This, along with sensors that can
detect wheel slip, apply brakes to the said wheel, while torque is delivered to the other wheels with grip.
There is also a Snow mode that reduces engine power when the sensors
detect wheel slip, and both an Offroad and a Custom Offroad setting.
However, if the car's electronic
detect wheel slip of any description, the 4WD system will activate and send power to the wheels with the most grip, front or rear.
Sensors in the wheels are able to
detect wheel slip and control the throttle input to help the car get un-stuck.
Standard AdvanceTrac ® automatically applies the brakes and modulates engine torque whenever
it detects wheel slip.
The last CR - V's all - wheel drive system used a fixed 60:40 (front / rear) torque split when engaged and could only send power rearward if
it detected wheel slip on the front axle.
It normally sends 60 percent of power to the rear wheels until the system
detects wheel slip.
If the ABS system
detects wheel slip, it signals the engine control unit to adjust torque output accordingly.
Not exact matches
Even the all -
wheel - drive system does great work in a performance - style vehicle like this because it biases power delivery completely to the rear
wheels until
wheel slip is
detected, then its famously quick - responding, electro - magnetic, central clutch pack diverts power to the front
wheels.
Like automatic versions of the 3 Series, the XE uses a ZF eight - speed automatic transmission, in this case sending 340 hp and 332 lb - ft of torque to the rear
wheels unless the system
detects slip, in which case it can engage the front
wheels as well.
(Volkswagen's 4Motion all -
wheel drive normally operates in front -
wheel - drive mode until the system
detects slip, at which point the differential can send 100 percent of available engine torque to the rear axle.)
We drove the «All 4» version which, like its Countryman sister, uses a part - time four -
wheel drive system to redistribute torque to the rear axle when
slip is
detected at the front.
Fully 100 percent of the torque heads straight for the rear
wheels unless
slip is
detected, in which case a maximum of 50 percent is sent to the front.
In essence, quattro Ultra acts more like a haldex system, keeping the Q5 mostly front
wheel drive and only shuffling power to the rear
wheels when a certain degree of
slip is
detected.
The new GT is 100 per cent rear -
wheel drive almost all of the time, only sending torque to the front when
slip is
detected.
Some models of this use a Torsen center limited
slip differential, and open differentials in the front and back, but they do this trick where they use the ABS sensors to
detect wheel spin, and then apply brakes to the spinning
wheel, forcing it traction to go to the other
wheels.
It works the same way as a slippy diff, but is managed by electrics rather than mechanics, slowing a
wheel if
slip is
detected and able to apportion up to 100 per cent of torque to either side.
The RS3 has a traditional haldex all -
wheel drive system which only directs power to the rear
wheels when
slip is
detected.
The all -
wheel drive system itself is based on the same Haldex system seen elsewhere on the MQB platform, running mostly in front
wheel drive until
slip is
detected.
When sensors
detect that
wheel slip is occurring or even just likely to occur, the All - Wheel - Drive (AWD) system can react within as little as 50 milliseconds to distribute up to 100 percent of the available torque to the rear w
wheel slip is occurring or even just likely to occur, the All -
Wheel - Drive (AWD) system can react within as little as 50 milliseconds to distribute up to 100 percent of the available torque to the rear w
Wheel - Drive (AWD) system can react within as little as 50 milliseconds to distribute up to 100 percent of the available torque to the rear
wheels
When it
detects side -
slipping or
wheel spin, ASTC provides integrated control of brakes, engine torque (via the electronic throttle control), transmission and electronically controlled four -
wheel drive to improve vehicle stability.
Almost always, the power is primarily to the front
wheels and only sent back after the vehicle's sensors
detect that the front
wheels are
slipping.
This distribution ratio can be changed within a fraction of a second if the sensors monitoring the
slip on all
wheels detect the respective requirement.
Using the same
wheel - speed sensors as the Antilock Braking System (ABS) and Electronic Stability Program (ESP ®), 4 - ETS can
detect the onset of wheelspin and rapidly pulse the brake at the
slipping wheel.
Options: Graphic Equalizer Radio: Am / Fm Audio System Window Grid Diversity Antenna Bluetooth Wireless Phone Connectivity Radio W / Seek - Scan In - Dash Mounted Single Cd Mp3 Player Clock Speed Compensated Volume Control Aux Audio Input Jack Steering
Wheel Controls Voice Activation Radio Data System Dvd - Audio External Memory Control And 20 Gb Internal Memory 9 Speakers 1 Lcd Monitor In The Front Real - Time Traffic Display Streaming Audio 600W Regular Amplifier Audio Theft Deterrent Galvanized Steel / Aluminum / Composite Panels Black Side Windows Trim And Black Front Windshield Trim Clearcoat Paint Fixed Rear Window W / Defroster Wheels W / Silver Accents Trunk Rear Cargo Access Tires: 255 / 40R18 Front & 275 / 40R18 Rear - Inc: Mixed Performance Black Grille W / Chrome Surround Light Tinted Glass Front Windshield - Inc: Sun Visor Strip Body - Colored Rear Bumper Body - Colored Front Bumper Body - Colored Door Handles Perimeter / Approach Lights Spare Tire Mobility Kit Fully Automatic Projector Beam High Intensity Low / High Beam Daytime Running Auto - Leveling Directionally Adaptive Headlamps W / Delay - Off Tailgate / Rear Door Lock Included W / Power Door Locks Wheels: 18 X 9 Front & 18 X 10 Rear - Inc: Light Alloy V - Spoke Style 513M Speed Sensitive Rain
Detecting Variable Intermittent Wipers W / Heated Jets Body - Colored Power Heated Auto Dimming Side Mirrors W / Manual Folding And Turn Signal Indicator Trip Computer Cargo Area Concealed Storage 2 - Way Power Passenger Seat - Inc: Power Seatback Side Bolster Support Manual Cushion Extension And Power Rear Seat Easy Entry Outside Temp Gauge Gauges - Inc: Speedometer Odometer Tachometer Oil Temperature Trip Odometer And Trip Computer Day - Night Auto - Dimming Rearview Mirror Hvac - Inc: Underseat Ducts Residual Heat Recirculation And Console Ducts Fade - To - Off Interior Lighting Interior Trim - Inc: Carbon Fiber Instrument Panel Insert Piano Black Door Panel Insert Carbon Fiber Console Insert And Metal - Look Interior Accents Full Carpet Floor Covering - Inc: Carpet Front And Rear Floor Mats Manual Tilt / Telescoping Steering Column Delayed Accessory Power Leather / Metal - Look Gear Shift Knob 2 Seatback Storage Pockets Cargo Space Lights Tracker System Integrated Navigation System W / Voice Activation 40-20-40 Folding Bench Front Facing Fold Forward Seatback Rear Seat Memory Settings - Inc: Driver Seat And Door Mirrors Illuminated Locking Glove Box Systems Monitor Driver And Passenger Door Bins Rear Cupholder Sport Leather Steering
Wheel Perimeter Alarm Front Cupholder Interior Lock Disable Cloth / Leather Upholstery Carpet Floor Trim And Carpet Trunk Lid / Rear Cargo Door Trim Leatherette Door Trim Insert Power 1St Row Windows W / Driver And Passenger 1 - Touch Up / Down 2 - Way Power Driver Seat - Inc: Power Seatback Side Bolster Support Manual Cushion Extension And Power Rear Seat Easy Entry Driver And Passenger Visor Vanity Mirrors W / Driver And Passenger Illumination Full Cloth Headliner Proximity Key For Push Button Start Only Driver Foot Rest Bmw Online Full Service Internet Access Remote Keyless Entry W / Integrated Key Transmitter 2 Door Curb / Courtesy Illuminated Entry And Panic Button Valet Function Engine Immobilizer Fixed Front Head Restraints And Manual Adjustable Rear Head Restraints Cruise Control W / Steering
Wheel Controls Power Door Locks W / Autolock Feature Sliding Front Center Armrest And Rear Center Armrest Cargo Features - Inc: Spare Tire Mobility Kit Cargo Net Front And Rear Map Lights 4 12V Dc Power Outlets Fob Controls - Inc: Trunk / Hatch / Tailgate Windows And Sunroof / Convertible Roof Full Floor Console W / Covered Storage Rear Console W / Storage And 4 12V Dc Power Outlets Heated Front Sport Seats - Inc: Lumbar Support Fixed Rear Windows Rear Hvac W / Separate Controls Power Fuel Flap Locking Type Garage Door Transmitter Air Filtration Dual Zone Front Automatic Air Conditioning Analog Display Remote Releases - Inc: Power Cargo Access 3.46 Axle Ratio Multi-Link Rear Suspension W / Coil Springs Engine Auto Stop - Start Feature Electro - Mechanical Limited
Slip Differential 4 -
Wheel Disc Brakes W / 4 -
Wheel Abs Front And Rear Vented Discs Brake Assist And Hill Hold Control Engine: 3.0 L Inline 6 - Cylinder M Twinpower Turbo Engine Oil Cooler 4500 # Gvwr 860 # Maximum Payload Electric Power - Assist Speed - Sensing Steering Sport Tuned Suspension Rear -
Wheel Drive Strut Front Suspension W / Coil Springs 15.9 Gal.
Fuel Tank220 Amp Alternator3.70 Axle Ratio4 -
Wheel Disc Brakes w / 4 -
Wheel ABS, Front And Rear Vented Discs, Brake Assist and Hill Hold Control50 State Emissions5450 # Gvwr80 - Amp / Hr 730CCA Maintenance - Free Battery w / Run Down ProtectionAutomatic w / Driver Control Ride Control Sport Tuned Adaptive SuspensionDual Stainless Steel Exhaust w / Chrome Tailpipe FinisherEngine Oil CoolerEngine: 6.2 L V8 SuperchargedFront And Rear HD Anti-Roll BarsHydraulic Power - Assist Speed - Sensing SteeringMechanical Limited
Slip DifferentialMulti - Link Rear Suspension w / Coil SpringsPremium Shock AbsorbersRear -
Wheel DriveShort And Long Arm Front Suspension w / Coil SpringsTransmission: 6 - Speed Manual TremecInterior10 - Way Power Driver Seat - inc: Power Height Adjustment, Fore / Aft Movement, Cushion Tilt, Manual Recline, Power 4 - Way Lumbar Support and Manual Rear Seat Easy Entry2 12V DC Power Outlets4 - Way Passenger Seat - inc: Manual Recline, Fore / Aft Movement and Manual Rear Seat Easy Entry60 - 40 Folding Bench Front Facing Fold Forward Seatback Rear SeatAir FiltrationAnalog DisplayCargo Area Concealed StorageCargo Features - inc: Spare Tire Mobility KitCargo Space LightsCarpet Floor Trim and Carpet Trunk Lid / Rear Cargo Door TrimCompassCruise Control w / Steering
Wheel ControlsDay - Night Auto - Dimming Rearview MirrorDelayed Accessory PowerDriver And Passenger Door BinsDriver And Passenger Heated - Cushion, Driver And Passenger Heated - Seatback and Ventilated Front SeatsDriver And Passenger Visor Vanity Mirrors w / Driver And Passenger IlluminationDriver Foot RestDual Zone Front Automatic Air ConditioningFade - To - Off Interior LightingFixed Rear WindowsFOB Controls - inc: Trunk / Hatch / Tailgate and WindowsFront And Rear Map LightsFront Center Armrest and Rear Center ArmrestFront Seats w / Power 4 - Way Driver LumbarFull Carpet Floor Covering - inc: Carpet Front And Rear Floor MatsFull Cloth HeadlinerFull Floor Console w / Covered Storage, Mini Overhead Console w / Storage and 2 12V DC Power OutletsGauges - inc: Speedometer, Odometer, Oil Pressure, Engine Coolant Temp, Tachometer, Oil Temperature, Trip Odometer and Trip ComputerHeated Leather / Metal - Look Steering WheelHomeLink Garage Door TransmitterHVAC - inc: Underseat Ducts and Console DuctsIlluminated Front CupholderIlluminated Locking Glove BoxInterior Trim - inc: Aluminum Instrument Panel Insert, Aluminum Console Insert, Chrome And Metal - Look Interior AccentsLaguna Performance Seats w / SRT Embossed LogoLeather / Metal - Look Gear Shift KnobManual Anti-Whiplash Adjustable Front Head Restraints and Fixed Rear Head RestraintsMobile Hotspot Internet AccessOutside Temp GaugePerimeter AlarmPower 1st Row Windows w / Driver And Passenger 1 - Touch DownPower Door Locks w / Autolock FeaturePower Tilt / Telescoping Steering ColumnProximity Key For Doors And Push Button StartRear CupholderRemote Keyless Entry w / Integrated Key Transmitter, Illuminated Entry and Panic ButtonRemote Releases - Inc: Power Cargo AccessSentry Key Engine ImmobilizerSmart Device IntegrationSystems MonitorTrip ComputerValet FunctionVoice RecorderExteriorBlack GrilleBlack Side Windows TrimBody - Colored Door HandlesBody - Colored Front BumperBody - Colored Power Heated Side Mirrors w / Manual FoldingBody - Colored Rear BumperClearcoat PaintFixed Rear Window w / DefrosterFully Automatic Projector Beam High Intensity Low / High Beam Daytime Running Auto High - Beam Headlamps w / Delay - OffGalvanized Steel / Aluminum PanelsLED BrakelightsLight Tinted GlassLip SpoilerPerimeter / Approach LightsPirelli Brand TiresRain
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When the management system
detects front -
wheel slip a multiplate clutch on the rear differential engages, without waiting for the drive shaft to spool up.
The all -
wheel - drive (AWD) S Q4 has its power biased toward the rear
wheels and only changes when
wheel slip is
detected.
If Electronic Control Unit
detects that one
wheel is
slipping, it applies the brake pressure to match its speed to the second, non-
slipping wheel.
When the system
detects slip, when cornering hard, or under heavy acceleration, the center diff can engage almost instantly, sending up to 50 percent of available torque to the rear
wheels.
If it
detects that the
wheels on the inside of the curve, which are under a reduced load, will soon begin to
slip, it marginally brakes these
wheels — just slight application of the pads on the disks at minimal pressure is all that it takes.
Honda's Real Time four -
wheel - drive system routes power to the rear only when front -
wheel slip is
detected, so everyday handling is predictably benign puller behavior.
This system defaults to the rear
wheels under normal conditions, shifting power to the front
wheels when it
detects slip.
xDrive, BMW's intelligent all -
wheel drive system, redistributes power to the
wheel with most traction when
slip is
detected or anticipated.
That brake technology complements a CVT Belt Protection System, which automatically retards ignition timing if the system
detects engine operation at high rpm for more than two seconds while the rear
wheels are motionless (i.e., if the belt is
slipping) and warns the rider via a flashing belt warning lamp on the dash.
If it
detects that the
wheels on the inside of the curve, which are under a reduced load, are about to
slip, it marginally brakes these
wheels — just slight application of the pads on the disks at minimal pressure is all that it takes.
The 4WD model features an Autotrac transfer case that can, with the twist of a dial, quickly be set to lock into four -
wheel - drive mode when off - road, rear -
wheel - drive mode for efficient street cruising or be left to its own devices to control the torque split, automatically sending torque to the front
wheels when
slip is
detected.
When
wheel slip is
detected, the HR - V sends power to the
wheels with more traction, providing smooth handling and traction.
When the vehicle is accelerating or
wheel slip is
detected, torque is sent to the rear
wheels.
The car also comes with traction control which works well to cut the power once it
detects slip on any of the
wheels.
The 2014 Journey SE's all -
wheel - drive system performs primarily on the front
wheels to conserve fuel, but it will engage the rear
wheels when
slip is
detected.
In normal operation, M xDrive sends 100 - percent of its power to the rear
wheels, and only diverts some to the front when it
detects slip.
A sub-function of the anti-lock brake system is that if it
detects application of the brakes on loose ground, it periodically increases
wheel slip during brake cycles.
When accelerating or if
slip is
detected, the SH - AWD system can send up to 70 - percent of the available torque to the rear and, when turning, it can torque vector to 100 - percent of that rear grunt laterally to either rear
wheel.
When
slip is
detected drive is transferred to the rear
wheels by an oil pump - driven clutch system, and the standard transmission is a six - speed S tronic (dual - clutch) unit, although Audi offers a manual transmission at no extra cost.
When placed in Auto mode, Active Drive I will send power to the front
wheels during normal driving, but send power rearward the second
wheel slip is
detected.
The Countryman ALL4 is a front
wheel drive car in most normal circumstances, but when any
slip is
detected on the front
wheels, or if the car is being driven enthusiastically, an electro - magnetic clutch, located on the rear axle, engages drive to the rear
wheels to improve traction.
After a few minutes playing in this little pit, mashing the throttle, we couldn't
detect any
slip from the front or rear
wheels.
The G70 2.0 T and 3.3 T models equipped with the Dynamic package are further enhanced by the inclusion of a mechanical limited
slip differential that improves traction on corner exit by balancing torque distribution across the rear axle when
wheel spin is
detected.
During moderate acceleration or when front
wheel slip is
detected in dry conditions, up to 40 % of engine torque is transferred to the rear
wheels.