Jeep WK Grand Cherokee Technology Glossary

By Jeep Experts

Welcome to the in-depth know-how glossary on WK Generation Jeep Grand Cherokee. We have organized as a lot data as we may discover right into a useful article under. Is one thing incorrect or lacking? Please get in contact with us and we’ll repair it!

4.7-liter V-8 gen II (2008-2009 fashions)
The new 4.7-liter V-8 presents higher gasoline financial system, energy and torque than the earlier 4.7-liter engine, whereas on the similar time delivering enhancements in refinement. The new 4.7-liter V-8 incorporates two spark plugs per cylinder (the one Chrysler Group engine to take action, apart from the 5.7-liter HEMI), elevated compression ratio, improved cylinder-head port movement and a brand new combustion system. The new engine is also able to working on E85 ethanol gasoline.

5.7-liter HEMI® V-8 gen II (2009-2010 fashions)
The all-new 5.7-liter HEMI® V-8 engine presents higher gasoline financial system, improved idle high quality and general refinement, together with extra horsepower and torque. In addition to Variable Valve Timing (VVT) and expanded Multi-displacement System (MDS) working vary, the HEMI’s gasoline financial system and efficiency enhancements consequence from elevated compression ratio, an lively consumption manifold with lengthy runners for low-end torque and brief runners for high-rpm energy, improved cylinder-head port movement effectivity, and lowered restriction exhaust and induction techniques. Numerous different {hardware} upgrades have been carried out to construct on the standard, reliability and sturdiness repute of the HEMI® engine. These embrace crankshaft structural upgrades, a dual-mass crankshaft damper, floating pin piston design, valve spring design and oil pump capability improve for VVT.

Air Dam
A spoiler under the entrance bumper that reduces aerodynamic carry, turbulence and drag by diverting airflow round, somewhat than below, the car. It might also be used to enhance airflow by means of the radiator and/or air-con condenser.

Antisway Bar
Helps cut back lean by resisting any unequal vertical movement between wheels on the identical axle.

Axle Ratio
The relationship between driveshaft revolutions and axle revolutions. Usually expressed as 3 .0:1 (learn “three level zero to at least one”) which means 3 .0 driveshaft revolutions to every revolution of the axle. The determine is obtained by dividing the variety of enamel on the ring gear by the variety of enamel on the pinion gear within the differential. A low numerical axle ratio (instance: 3 .07:1) is called a “quick/excessive” ratio, as a result of highway pace is comparatively quick for any given engine pace. The traits of this ratio are decrease engine pace, discount in efficiency means (energy), and fewer engine revolutions per mile, thus bettering gasoline financial system. A excessive numerical axle ratio (instance: 4.10:1) is called a “gradual/ low” ratio, as a result of the highway pace is slower relative to engine pace. The results embrace raised engine pace, elevated efficiency means (energy), elevated engine revolutions per mile and elevated gasoline consumption.

Belt Alert
Enhanced seat-belt reminder system. If a car is pushed with out the motive force or entrance passenger being correctly belted, the system will periodically activate a chime and illuminate a lamp within the instrument cluster to remind the motive force to buckle up. The lamp will keep lit within the instrument panel till the motive force or passenger bucklesup. The driver ought to then instruct all occupants to buckle up as nicely.

Body-on-Frame Construction
A sort of auto building through which the physique construction is hooked up to a separate body.

Brake Assist System
Tests have proven that the majority drivers fail to use the brake pedal vigorously sufficient throughout an emergency scenario, and the Brake Assist System was designed to intervene if the motive force reacts shortly however hesitantly when braking. The system acknowledges conditions through which emergency braking is known as for and mechanically will increase braking stress to its most. The system pc compares such components as pedal journey, pace of pedal journey and highway pace with different saved values to find out if an emergency scenario exists.

Breakover Angle
The diploma of slope which defines the biggest ramp or hill {that a} car can journey over with out scraping in opposition to the body or underbody parts.

An integral a part of the disc brake meeting that holds the brake pad. When the brakes are utilized, the caliper’s pistons push the brake pad in opposition to the rotor, slowing or stopping the car.

Catalytic Converter
An emissions-control machine within the exhaust system that accommodates platinum or palladium as a catalyst for the chemical response of unburned hydrocarbons and carbon monoxide. It converts them into water vapor, carbon dioxide and different innocent gases.

Child Seat Anchor System
All Chrysler automobiles characteristic decrease anchors and higher tether anchors for suitable little one seats. An higher tether with a metallic clip,

Coil-on-Plug Ignition System
Includes particular person coils linked immediately to every spark plug. The coils present extra vitality below regular working circumstances, eliminating the weak hyperlink in earlier ignition techniques — ignition cables. Since polarity is fixed, these outcomes cut back electrode erosion and prolong spark plug life.

Common-Rail Diesel (CRD)
A diesel engine with a gasoline injection system using a typical stress accumulator, referred to as the rail, which is mounted alongside the engine. The rail is fed by a high-pressure gasoline pump. In the common-rail injection system, the injection stress is unbiased from engine pace and cargo. Therefore, the injection parameters might be freely managed. Usually a pilot injection is launched, which permits for reductions in engine noise and emissions. This superior system additionally contributes to elevated energy and torque.

Compression Ratio
The quantity of the combustion chamber and cylinder when the piston is on the backside of its stroke, divided by the quantity of the combustion chamber when the piston is on the prime of its stroke. The increased the ratio, the extra vitality that’s developed from the air/gasoline combination.

Controller Area Network (CAN)
Electrical structure system that maintains open communication designed to hyperlink in-vehicle techniques. CAN is the in-vehicle community for the engine administration, the physique electronics akin to door and roof management, air-con, lighting, and leisure management. It simplifies the coordination of a number of digital features.

Cubic Inch Displacement (CID)
A measurement of engine dimension. In this case, displacement is the same as the full variety of cubic inches the pistons displace as they transfer from backside lifeless heart to prime lifeless heart throughout the engine. Displacement can be measured in liters (L).

Curb Weight (CW)
The weight of an empty car with out cargo or occupants, together with gasoline, coolant, oil and all commonplace and elective gear.

Dead Pedal
A footrest discovered to the left of the leftmost pedal. It supplies a spot for the motive force to brace his/her left leg throughout exhausting cornering

Departure Angle
The diploma of slope a car can depart from with out scraping the bottom or damaging any rear-end parts.

Often known as “run-on” in a gasoline engine, it happens when the ignition is turned off however the engine continues to run. It’s attributable to extreme quantities of gasoline within the cylinders, coupled with scorching glowing carbon deposits within the combustion chamber that act as glow plugs; the mixture produces a quasi-diesel engine. It can be attributable to excessive manifold pressures (on a usually aspirated engine) mixed with excessively retarded ignition timing.

A system of gears positioned within the heart axle housing between the driving wheels. Its function is to transmit engine torque to each driving wheels, whether or not the car is touring straight or turning a nook. This gearing permits every wheel to rotate at totally different speeds (as required when turning a nook), however maintains equal torque on every wheel to realize the specified ahead or rearward motion. Fourwheel- drive automobiles have a differential at each entrance and rear axles.

Disc Brakes
Hydraulically actuated calipers power pads in opposition to the perimeters of a rotor to create friction, resulting in car braking. This motion is much like the best way you’ll cease a spinning bicycle tire along with your thumb and forefinger. Some automobiles have entrance disc/rear drum preparations, though most fashions at the moment are geared up with four-wheel disc brakes. This system is mostly thought to be superior to disc/drum brake purposes resulting from its resistance to fade or discount of braking means throughout repeated purposes, akin to coming down a steep grade. The pads and rotor are higher uncovered to air cooling then an enclosed drum brake design.

The whole quantity of an engine’s cylinders that’s “swept out” by the pistons. Displacement is often measured in cubic inches, cubic centimeters or liters. One liter or 1,000 cubic.

Drag Coefficient (Cd)
One measure of a car’s effectivity as an aerodynamic form. Drag coefficient is a mathematical issue which, when multiplied by the projected sq. footage space of the car, offers its drag power in kilos. The decrease the quantity, the higher the aerodynamic effectivity. Drag Coefficient (Cd) = (Drag Force ÷ Dynamic Pressure) x Frontal Area.

The basic qualitative analysis of a powertrain’s working qualities, together with idle smoothness, cold and warm beginning, throttle response, energy supply and tolerance for altitude adjustments.

Shaft connecting the transmission output shaft to the differential drive pinion shaft. Four-wheel-drive automobiles add a second driveshaft from the switch case to the entrance differential. Also often called a propeller shaft.

Vehicle parts that drive the car and switch energy. Includes the engine, clutch, torque converter, transmission, switch case, common joints, driveshafts, differential gears and axle shafts. (Note: The clutch and torque converter are a part of the transmission).

“ECO” Indicator
Eco Indicator lets drivers of 5.7-liter HEMI®-powered automobiles know when they’re in four-cylinder mode, permitting them to change their driving habits for improved gasoline effectivity. For 2010, this characteristic has been expanded to incorporate further powertrain techniques, serving to clients save gasoline by avoiding speedy begins, sustaining regular speeds and decelerating easily. The characteristic is included as a part of the Electronic Vehicle Information Center (EVIC).

Electronic Fuel Injection (EFI)
A system which introduces gasoline at every cylinder’s consumption port by means of particular person injectors instead of a central standard carburetor. EFI exactly controls the quantities of gasoline used and improves the dispersion of gasoline within the air cost.

Electronic Limited-Slip Differential (ELSD)
An ELSD within the entrance and rear axles is just obtainable with theQuadra-Drive II® lively fourwheel- drive system (with the NV245 switch case). In an ELSD, every axle consists of an electronically managed moist clutch pack differential. This system is made up of a hydraulic pump, piston and electronically managed solenoid valve that controls stress. The hydraulic pump makes use of the axle fluid as its hydraulic fluid. The pump case is splined to the differential service, and the pump rotor is splined to an axle shaft. In this fashion, axle shaft pace distinction is required to show the pump and construct stress. Pressure is managed by the solenoid valve and is utilized to the piston as wanted. The piston acts on the moist clutch to create torque and get rid of slip. The Final Drive Control Module prompts the clutch packs to ship torque to the wheel with probably the most traction. When the antilock brake system is activated, the Final Drive Control Module stops sending present to the differential solenoid, and the stress will bleed off contained in the clutch pack, unlocking the clutch. ELSDs can quickly switch torque to the wheel with probably the most traction, producing twice as a lot torque within the rear axle and 4 instances as a lot within the entrance axle, in comparison with Vari-Lok® progressive axles.

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Electronic Range Select (ERS)
Electronic Range Select (ERS) driver-interactive shift management is commonplace with both the 545RFE, WA580 or W5J400 transmissions. Moving the shifter left and proper when the shifter is within the Drive place permits the collection of the specified prime gear. ERS permits the motive force to pick out the highest gear, offering extra management.

Electronic Roll Mitigation (ERM)
ERM is an added vehiclestability measure of Electronic Stability Program* (ESP), on choose fashions, designed to assist preserve car stability throughout an emergency maneuver or accidentavoidance scenario. While ESP aids the motive force in sustaining car stability, throughout the limits of traction, to maintain the car heading in the right direction, Electronic Roll Mitigation (ERM) makes an attempt to find out when a car is able to roll, then applies a entrance brake to cut back the probability of such an incidence. ERM won’t support car stability in “journey” conditions, akin to when the car strikes a curb or one other object.

Electronic Stability Program (ESP)
This system aids the motive force in sustaining car directional stability. ESP will do no matter might be performed, throughout the limits of obtainable traction, to maintain a car heading in the right direction. ESP takes the capabilities of ABS and all-speed traction management to a brand new degree of auto stability. The system’s sensors detect oversteer or “fishtailing,” which happens when the rear wheels of a car swing too broad throughout a flip, inflicting a car to go off the motive force’s supposed path. The system’s sensors detect understeer too — also referred to as “plowing.” It happens when a car is responding too slowly to steering adjustments in a flip, inflicting the entrance finish to slip out. ESP makes use of digital sensors to find out if there’s a distinction between the car’s precise path and the motive force’s supposed path. The steering wheel sensor displays the motive force’s intent. To measure the car’s precise path, ESP makes use of wheelspeed sensors, a lateral acceleration sensor and a yaw sensor. With this information, ESP selectively applies brakes and reduces engine energy even earlier than the motive force senses there’s a downside.

Electronic Throttle Control (ETC)
A way more refined system than conventional injection management, ETC responds by means of mechanical analog gadgets to find out the quantity of gasoline to inject in addition to injection timing, enhancing responsiveness and decreasing emissions. It makes use of a DC motor with discount gears to open and shut the throttle, controlling all airflow into the engine. There isn’t any bodily connection between the pedal and the throttle. The engine management pc interprets accelerator pedal actions and interprets them into throttle positions.

Electronic Vehicle Information Center (EVIC)
Programmable module with a reconfigurable show that reveals all journey data screens and may embrace such options as: compass/exterior temperature, common and present gasoline financial system, estimated distance to empty, elapsed journey time, miles to subsequent service, or a clean display. It additionally has a secondary journey odometer and shows warning screens, car personalization screens and a customized menu. In many automobiles, the EVIC additionally shows Tire Pressure Monitoring System warnings.

Engine Block Heater
An electrical heating aspect, powered by an exterior 110- volt provide, immersed within the coolant within the engine block, or immediately into the engine block, to facilitate simpler winter beginning at low ambient temperatures.

Engine Braking
A means of slowing the car when happening a grade by shifting to a decrease gear andusing the compression resistance of the engine to assist gradual the car.

Enhanced Accident Response System
In the occasion of an affect that causes air bag deployment, an Enhanced Accident Response System switches on the inside lamps and unlocks the door after the car has stopped. This helps emergency personnel render acceptable help. The lamps stay on so long as the battery has energy or till the ignition secret is eliminated.

Final Drive Ratio
The ratio between the engine rpm and the drive-wheel axle shaft rpm. It is set by the ring-and-pinion gear contained in the differential. For instance, if the ratio is 4.00:1, the driveshaft rotates 4 instances for every rotation of the rearaxle differential gear, the axle shafts and the wheels. A car’s acceleration and gasoline financial system might be altered by the ultimate drive ratio.

Flex Fuel Vehicle (FFV)
A car that’s designed to function on unleaded gasoline or a mix of unleaded gasoline and ethanol (alcohol), as much as a most of 85 p.c ethanol (E85). E85 presents efficiency and environmental advantages. When ethanol is mixed into E85 (85 p.c ethanol with 15 p.c gasoline), the result’s a 100+ octane ranking with an approximate 5 to 7 p.c improve in engine horsepower in some automobiles. E85 accommodates fewer toxins than are present in unleaded gasoline and supplies an estimated 35 p.c discount within the exhaust emissions. However, E85 is about 30 p.c much less environment friendly than gasoline. As a consequence, extra ethanol than gasoline is required to journey an equal distance.

Four-Wheel Drive
A drivetrain that makes use of a switch case to distribute engine energy between the entrance and rear axles in an effort to drive all 4 wheels. Full-time four-wheel-drive techniques make the most of a middle differential, which permits the entrance and rear driveshafts to show at totally different speeds, thereby allowingengagement on dry pavement for regular driving circumstances. A component-time system doesn’t make use of a middle differential and, throughout regular driving circumstances, should function solely in two-wheel drive. With a parttime system, the four-wheeldrive mode is for use solely when off-road or on moist or slippery surfaces.

Fuel Injection
A sort of gasoline system utilizing a pump and injectors, as a substitute of a carburetor, to meter gasoline. There are two foremost varieties of gasoline injection: direct cylinder injection, which sprays the gasoline proper into the combustion chamber, and multipoint injection, which places the gasoline cost into the consumption passage someplace upstream of the consumption valve. Fuel supply might be managed mechanically or electronically, and gasoline stress might be both pulsed, steady or a mix of the 2. Pulsed injection exactly controls the size of time the gasoline is sprayed, whereas steady injection makes no try at timed injections, however somewhat regulates the amount of regular movement.

Fuel Saver Mode Display
Lets drivers of HEMI-powered automobiles know when they’re in fourcylinder mode, permitting them to change their driving habits for improved gasoline effectivity. Included as a part of the Electronic Vehicle Information Center.

Gear Ratio
The variety of revolutions of a driving gear required to show a pushed gear by means of one full revolution. For a pair of gears, the ratio is discovered by dividing the variety of enamel on the pushed gear by the variety of enamel on the driving gear. A gear with 45 enamel pushed by a gear with 15 enamel would supply a ratio of three.0:1 (learn “three level zero to at least one”). A gear with 15 enamel pushed by a gear with 45 enamel would supply a ratio of 1.0:3.

Gross Vehicle Weight (GVW)
The whole weight of a car with cargo (together with camper physique), driver, passengers, gasoline, fluids and commonplace and elective gear.

Halogen Headlamps
Headlamps with halogen gas-filled bulbs that produce extra lighting energy per watt of electrical energy than standard bulbs.

Heater, Ventilation and Air Conditioning (HVAC) System
The local weather management system of a car. The HVAC is designed to supply a snug local weather for all passengers and good visibility by means of the home windows and windshield, thereby decreasing driver stress and fatigue.

HEMI® Engine
The 5.7L HEMI V8 engine consists of the next options: Aluminum cylinder heads with hemispherical combustion chambers and pushrod-operated, splayed valves for prime airflow. A excessive compression ratio for energy and financial system. Electronic throttle management system. Integrated Air-Fuel Module incorporating the consumption manifold and 14 different parts. Two spark plugs per cylinder fired by a distributorless ignition system with high-power coils to make sure constant, full combustion. A completely balanced, forged, nodular iron crankshaft working in cross-bolted foremost bearing caps to cut back deflection and vibration. SRT8 fashions additionally obtain a HEMI engine. Increased to six.1L, this high-performance variant incorporates many further race-proven enhancements.

High Intensity Discharge (HID)
High Intensity Discharge (HID) low-beam headlamps present roughly 21/2 instances the sunshine output of standard reflector lamps for even higher nighttime illumination. Their mild seems bluish in comparison with standard lamps, however their spectrum is nearer to that of daylight than halogen or incandescent bulbs to additional enhance nighttime visibility and have a considerably longer lifetime than halogen bulbs.

Hill Descent Control
Allows a clean and managed hill descent on tough or slippery terrain with out the motive force needing to the touch the brake pedal. This system applies the brakes to every wheel individually when wanted to cut back ahead movement whereas negotiating down steep grades.

Hill Start Assist
Assists the motive force when beginning a car from a cease on a hill by sustaining the identical degree of brake stress the motive force utilized for a brief time period after the foot has been faraway from the brake pedal. The system will launch the brake pedal in proportion to the quantity of throttle utilized. If the throttle just isn’t utilized inside a brief time period after the foot has been faraway from the brake pedal, Hill Start Assist will launch brake stress.

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Horsepower (hp)
A measure of the quantity of labor that may be performed in a sure period of time. One horsepower is the same as 550 lb-ft of labor per second, or the vitality wanted to carry 550 lb one foot off the bottom in a single second. The horsepower of an engine relies upon upon the torque and pace of the engine. hp = (Torque x rpm) ÷ 5,252.

Independent Suspension
A suspension design that permits the linked or adjoining wheel to maneuver independently. An unbiased suspension design is just a design through which a wheel just isn’t immediately linked to a different wheel on the car. Allowing a wheel to maneuver up and down independently over a bump means solely that wheel reacts — offering a smoother, extra secure journey.

iPod Interface
Allows an iPod to be plugged into the car’s sound system to play music by means of the car’s audio system, cost/recharge the iPod when the ignition is on, show artists and music selections on the radio and pause play when the UConnect system receives a telephone name. The iPod might be managed by means of the radio controls and the distant steering wheel switches (if geared up). The system makes use of a Universal Customer Interface (UCI) connector positioned within the glove field. An elective connection cable is obtainable by means of Mopar.

Jeep® Truck Engine Controller (JTEC)
The newest model of the Powertrain Control Module (PCM) utilized in Jeep and Dodge truck fashions. JTEC exactly controls the gasoline injector pulses and ignition spark timing for peak engine energy and effectivity below all working circumstances: beginning, idling, acceleration, cruising and deceleration.

Knee Blocker
A portion of the decrease instrument panel that’s designed to soak up vitality within the occasion of a frontal collision, maximizing the air bag’s effectiveness and minimizing the probabilities of occupants sliding below the dashboard. A driver inflatable knee blocker acts like an air bag for the motive force’s knees and inflates when the motive force air bag is deployed.

Limited-Slip Differential
A tool within the differential that limits the pace distinction between the 2 wheels. This prevents one wheel from spinning whereas the opposite is stationary and improves traction on slippery surfaces.

Locking Differential
A tool within the differential that eliminates the pace variations between the 2 driveshafts or axle shafts. This ensures that every axle or wheel will obtain equal torque.

Lower Anchors and Tethers for Children (LATCH)
The LATCH system helps simplify the set up of a suitable aftermarket little one seat with out utilizing the car’s seat belts. This system takes benefit of each the higher and decrease tether anchors to attenuate the motion of suitable little one seats whereas maximizing correct set up by the customers.

Low-Risk Deployment Air Bags
These front-passenger air baggage use distinctive form, venting, folding patterns, superior inflators or a mix of those 4 applied sciences to place and inflate the restraint correctly for a belted passenger whereas additionally assembly federal security necessities for out-of-position, small occupants and rear-facing toddler seats. Even with these superior front-passenger air baggage, all occupants are suggested to at all times sit correctly of their seats with the seat belt fixed. Children 12 and youthful ought to at all times be seated in a again seat appropriately, utilizing an infant- or child-restraint system or having the seat belt positioned appropriately for his or her age and weight.

Manufacturer’s Suggested Retail Price (MSRP))
The advised full retail worth of a product as decided by the product’s producer.

Multi-Displacement System (MDS)
Deactivates 4 cylinders when the remaining 4 are sufficient to fulfill energy necessities. The engine operates on all eight cylinders for acceleration and heavy hundreds and 4 cylinders in metropolis visitors driving and for cruising, even at some interstate freeway speeds. The engine idles on eight cylinders for max smoothness. MDS operates between 1,000 and three,000 rpm. It will function in four-cylinder mode when the torque requirement is lower than 95 p.c of the utmost obtainable from 4 cylinders. It supplies full-rated energy in V8 kind with an elevated gasoline financial system profit when working in fourcylinder mode, relying on driving habits and car utilization. It is built-in into the essential engine structure and is extra dependable than add-on techniques. Deactivation and activation of the cylinder is clear to the motive force.

Multipoint Fuel Injection (MPI)
Fuel injectors are mounted immediately within the consumption manifold near the consumption ports of every cylinder. Improves gasoline distribution and engine respiration for improved effectivity and lowered exhaust emissions.

MyGIG™ Entertainment System
The MyGIG Entertainment System is a cutting-edge multimedia audio and leisure system. The 20-gigabyte exhausting drive is obtainable for music storage and administration. SIRIUS Satellite Radio and UConnect Hands-free Communication are elective on this technique.

MyGIG™ Multimedia Infotainment System
This multimedia infotainment system is a sound/navigation/ media system pushed by a 20 Gigabyte exhausting disk drive (HDD). The HDD responds to each voice instructions and touch-screen enter to allow the person to handle information and function the system’s features. A 6.5-inch display shows navigation features and permits the person to view information, akin to photographs or DVDs, and use the system’s contact instructions. The features of the MyGIG system fall into three classes: Information, (e.g., turn-by-turn navigation and visitors alerts), Entertainment (e.g., CDs, DVDs, SIRIUS®, MP3 information), and Communications (e.g., hands-free calling and voice recorder for memos). To view a DVD on the pinnacle unit’s display within the entrance seat, the car should first be positioned in Park. The MyGIG voice command operate acknowledges and “learns” phrases in English, French, or Spanish for U.S. and Canada purposes. Integrated Bluetooth® connectivity and the button to pick out hands-free calling at the moment are positioned on the MyGIG. To use hands-free calling the person will need to have a Bluetooth enabled mobile phone. While the MyGIG system has a large number of capabilities, its obtainable features might be decided by the car’s gear. For instance, the MyGIG system has the potential of displaying the picture from a rear park help digicam on its display; nonetheless, the car will need to have the required gear (e.g., rear-mounted digicam) for the operate to function.

Noise, Vibration and Harshness (NVH)
An business time period related to vibration and audible sounds. Harshness often refers to transient frequencies or shock. The human ear can typically detect frequencies within the vary of 20 to twenty,000 Hz (Hertz, or cycles per second). Vibrations above and under this vary will not be detected by the human ear, however should require remedies for improved product per formance, longevity and buyer satisfaction.

Overdrive (OD)
It might be both an “additional” gear (often fifth in a handbook gearbox) or an aftermarket unit that bolts on between the gearbox and the driveshaft. The function of overdrive is to cut back engine rpm at freeway speeds to acquire a rise in gasoline financial system, to cut back engine put on and to decrease transmission temperatures. In overdrive, the engine turns lower than one revolution for every revolution of the driveshaft. For instance: 0.75:1, through which the driveshaft rotates as soon as for each 3/4 revolution of the engine.

ParkSense® Rear Park Assist System
This system dietary supplements the within and outdoors rearview mirrors, serving to the motive force decide if an impediment is within the rear path of the car when maneuvering in tight areas at parking speeds. When the motive force selects Reverse or Neutral, the system scans for objects behind the car, utilizing 4 ultrasonic sensors positioned within the rear fascia. Objects as shut as 10 inches and as far-off as 59 inches might be detected. A warning show above the rear window supplies each seen and audible warnings indicating the proximity of most bigger, stationary objects that is likely to be exterior the motive force’s line of sight.

ParkView™ Rear Back-up Camera
ParkView Rear Back-up Camera shows a rearview video picture when the car is in Reverse. This characteristic helps the motive force decide if an impediment is within the path of the car and provides higher rearward visibility when backing up. The ParkView Rear Back-up Camera, positioned on the rear of the car, permits drivers to see issues immediately behind the car and low to the bottom, an space that’s usually a blind spot. A coloration picture shows on a display in entrance of the motive force at any time when the transmission is positioned in Reverse. Shifting out of Reverse deactivates the system. The digicam operates in all varieties of lighting conditions and wishes no supplemental mild. The rear back-up digicam advantages the motive force by serving to them see objects behind the car as they maneuver in Reverse.

Power Adjustable Pedals
The horizontal place of the brake and accelerator pedals (and clutch pedal on Ram fashions) might be adjusted by the motive force. The pedals might be positioned in a means that permits the motive force to take a seat a snug distance from the motive force’s air bag and nonetheless have full accessibility to the pedals.

Powertrain Control Module (PCM)
Precisely controls gasoline injector pulses and ignition spark timing for peak engine energy and effectivity by utilizing digital sensor inputs from the engine, transmission and exhaust system.

Quadra-Drive II Active Four-Wheel Drive
The NV245 electronically shifted lively, two-speed switch case operates along side Electronic Limited-Slip Differentials (ELSD) to actively shift torque in all instructions to take care of most traction.

Quadra-Trac I Four-Wheel Drive
The NV140 full-time, single-speed switch case operates along side all-wheel traction management to reply to lack of traction through open differentials.

Quadra-Trac II Active Four-Wheel Drive
The NV245 electronically shifted lively, two-speed switch case operates along side 4-Wheel Brake Traction Control (4BTC) to reply to wheel slippage.

Rain-Sensing Wipers
This driver comfort characteristic mechanically senses moisture on the windshield and prompts the wipers.

The most really helpful revolutions per minute for an engine. In automobiles geared up with a tachometer, redline is often indicated by a pink space on the gauge.

Remote Start
Starts the car’s engine from as much as 300 ft away. If the car is provided with Automatic Climate Control, it’s going to mechanically alter, offering defrost, warmth or air-con based mostly on the surface temperature. Control of the Remote Start system is built-in into the car’s distant keyless entry fob.

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Removable Flashlight
Mounts within the cargo space and snaps out of the bezel when obligatory. It is dual-purpose, functioning as a dome mild and as a detachable flashlight. Rotor
A flat disc that rotates with and is hooked up to a wheel in a disc brake system. During braking, pads are pressed in opposition to the rotor by the calipers to gradual the car.

Run-Flat Tires
Also often called “Zero-Pressure” tires, run-flat tires permit the car to journey as much as 50 miles at 55 mph with no tire stress. Run-flat tires usually characteristic a stiffer inner building that’s able to quickly carrying the load of the car, even after the tire has misplaced all air stress. The tire building usually consists of rubber sandwiched between layers of heatresistant twine within the sidewall to assist forestall the tire sidewalls from folding over on themselves. Because run-flat tires are so good at masking the signs of air loss, they require a tire stress monitoring system to alert the motive force to the lack of stress.

Running Ground Clearance
The distance from the bottom to the bottom level between the axles in a car. It might be measured whereas the car is loaded or at curb weight.

Sentry Key® Antitheft Engine Immobilizer
This system consists of the Sentry Key Immobilizer Module (SKIM) and two keys geared up with a transponder (digital machine) positioned inside the important thing head. If the SKIM acknowledges the sign from the important thing as legitimate when the ignition change is turned on, it’s going to permit the engine to run. If the sign is acknowledged as invalid, the engine will begin, run for roughly two seconds, after which stall. After six consecutive unsuccessful engine begin makes an attempt, the engine controller will disable the engine starter and gasoline system. Additional encoded keys might be obtained by means of Chrysler, Dodge or Jeep® dealerships.

Sequential Multipoint Fuel Injection (SMPI)
A gasoline injection system that makes use of one gasoline injector per cylinder and injects gasoline into the consumption ports individually in a predetermined sequence so gasoline is delivered on the precise time it’s wanted.

Selec-Trac® II
A full-time, lively on-demand system that anticipates and prevents wheel slip earlier than it happens. This premium system presents a “4WD Auto” mode that’s preferrred for full-time driving. When driving in 4WD Auto mode, the system makes use of car sensors to regulate and redirect torque between entrance and rear axles based mostly on real-time driving circumstances, offering the car with responsive traction efficiency. For added functionality when traversing steep grades, tough terrain or extraordinarily poor-traction surfaces, the switch case features a “4WD Low” mode. This second gear multiplies engine torque 2.72 instances and locks the clutch pack for max traction.

Serpentine Belt
A drive belt that mixes a Vribbed and flat-back belt and is designed to cut back the variety of belts wanted to drive the equipment. An computerized tensioning machine is often required.

SIRIUS Backseat TV™
Chrysler Group is the primary and solely auto producer to supply SIRIUS Backseat TV in its 2008 mannequin yr car lineup. Backseat TV options three channels of revered youngsters’s TV that includes most of the most well-known youngsters’ programming, together with Nickelodeon, Disney Channel and Cartoon Network. The system operates through an in-vehicle satellite tv for pc video receiver and two small roof-mounted antennas. Programming is displayed on the car’s second- and/or third-row video display, and channel identify, program title and ranking might be broadcast and displayed on the display. For added flexibility, rear-seat passengers can take pleasure in SIRIUS Backseat TV whereas frontseat occupants take heed to SIRIUS Satellite Radio. The system might be operated from both the rear-seat leisure unit or the radio head unit. In addition, when the car is in Park, programming might be displayed on the MyGIG display for front-seat viewing.

Skid Plate
A sturdy metal plate mounted beneath the entrance suspension, switch case or gasoline tank of a car to guard these parts from obstacles prone to be encountered in rugged nation (rocks, tree stumps, and so on.).

GoodBeamTM Intelligent Headlamp High-Beam Control System
This clever system mechanically supplies the utmost quantity of sunshine for nighttime driving circumstances. Under regular “handbook” high-beam operation, each the high and low beams are on at full depth. When the GoodBeam characteristic is working, the low beams stay on at full depth, whereas the depth of the excessive beams varies from 25 to one hundred pc to supply the utmost quantity of sunshine for nighttime driving circumstances. A digicam on the windshield measures the refraction of sunshine and density.

Speed-Sensitive Power Steering
A steering system that adjusts the quantity of energy steering help in line with car or engine pace. At excessive speeds, help is at a minimal, offering crisp highway really feel. At low speeds akin to parking, help is bigger, so turning the steering wheel requires significantly much less effort.

Stabilizer Bar
Also (incorrectly) known as an antisway bar. It is a transverse bar linking either side (both entrance or rear) of the suspension, typically taking the type of a torsion bar, with rubber bushing mounts on the chassis that permit it to show freely. The bar’s foremost operate is to cut back physique lean, nevertheless it has an affect on general dealing with traits as nicely.

Stain-repel seat material
Offers three key advantages: repelling stains, controlling odor and decreasing static electrical energy. Dual-action know-how repels and releases spills that might stain different auto materials. This know-how additionally permits the upholstery floor to dry shortly. In addition, the seating material reduces static electrical energy generated when getting into or exiting the car.

Tip Start
With the introduction of Control Area Network BUS (CAN Bus), car features might be operated “be wire” or with none mechanical help. In many Chrysler Group automobiles, beginning the car is likely one of the operations that’s now pc managed. The car’s Electronic Control Unit (ECU) accepts an enter from the important thing turning within the ignition to the “Start” place; numerous features are set into movement that can begin the engine with out the operator holding the important thing within the “Start” place. This is simply one of many features that profit from CANBus know-how.

Trailer Sway Control
Reduces trailer sway and improves dealing with in adversarial towing circumstances attributable to crosswinds, visitors and improper weight distribution on the trailer. The system displays the car’s motion relative to the motive force’s supposed path, and the car yaw sensor acknowledges sway. TSC applies brake stress to at least one entrance wheel to counteract the yaw induced by the trailer and applies brake stress to all 4 wheels to gradual the car. As the trailer sways to the opposite facet of the car, TSC will improve stress to the other facet of the car. The system will proceed to use alternating brake stress and cut back engine torque till the trailer is below management.

Uconnect Multimedia
Uconnect Multimedia consists of:

Media Center radios–5 totally different radio choices, three with a 30-gigabyte exhausting drive, USB enter for music and photograph downloads. The Media Center is the hub of the car infotainment system
Audio techniques–Sound techniques together with audio system and amplifiers
Audio Jack–Standard enter permits MP3 gamers or different audio sources to be performed by means of the car’s audio system
Bluetooth Music Connection–Debuting on the all-new 2011 Jeep Grand Cherokee, permits streaming music from supported cell telephones (and future MP3 gamers) to be performed over the automobile’s sound system
iPod® Control–Full iPod integration with controls obtainable by means of the media heart or steering wheel
iPod USB Control–Debuting on the 2011 Jeep Grand Cherokee, permits voice search by music title and artist for iPod gadgets
SIRIUS Satellite Radio–More than 130 channels of one of the best music, leisure and data. Depending upon mannequin availability, SIRIUS Satellite Radio could also be operated from the rear-seat leisure unit or from the Media Center
Voice Command–Chrysler Group LLC’s hands-free voice recognition system. Most Media Center radio options are operable with Voice Command, which is commonplace with Uconnect Phone
Rear-seat leisure–DVD participant and a 9-inch video display with wi-fi headphones, inputs for gaming gadgets, and so on.
Dual-screen rear-seat leisure–DVD participant with two 9-inch video screens (one for every row) with wi-fi headphones, inputs for gaming gadgets, and so on.
SIRIUS Backseat TV™–Streaming TV from Nickelodeon™, Disney Channel™ and Cartoon Network Mobile™ (obtainable with rear-seat leisure system)

Uconnect Navigation
Uconnect Navigation combines the options of Global Positioning System (GPS), factors of curiosity, SIRIUS Traffic and Voice Command. Chrysler Group LLC’s Voice Command and contact display permit straightforward operation. If the car is in movement, Voice Command will acknowledge greater than 100,000 phrases for inputting addresses. New for 2010, the combination of Garmin’s well-known navigation know-how into one among Chrysler’s media heart/head-unit choices. This presents clients dependable, seamless use of what has turn out to be a obligatory know-how.

Uconnect Phone
Uses Bluetooth know-how and Chrysler Group LLC’s Voice Command to supply voice-controlled wi-fi communication between the occupants’ suitable cell phones and the car’s onboard receiver. The built-in Address Sync characteristic mechanically downloads as many as 1,000 telephone guide entries from supported telephones, which may then be chosen by voice command. The system additionally acknowledges three languages and is able to studying phrases. Voice Command perhaps used to handle onboard phone-book entries, choose radio stations and entry voice mail. Voice memos could also be recorded utilizing microphones which can be built-in throughout the rearview mirror. Multiple memos of as much as 30 seconds every could also be saved within the system. The hands-free choice promotes security, freedom, worth and suppleness. With hands-free telephone operation through Bluetooth®, Voice Command permits customers to pick out radio stations, select satellite tv for pc radio channels and enter navigation locations by voice recognition.

Uconnect Web
The system supplies high-speed information switch and suppleness, combining WiFi and 3G mobile connectivity for a brand new degree of wi-fi know-how. The system transforms the car right into a “scorching spot” to ship the Internet on to the car for immediate entry to Web websites, e-mail, personalised music, on-line gaming, photograph albums and extra. The Good Housekeeping Research Institute gave Uconnect Web a 2009 VIP (Very Innovative Product) Award. .

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