Tiguan Haldex All-Wheel Drive - Freel2.com

All-Wheel Drive Clutch DetailsElectro-Hydraulic AssemblyThe electro-hydraulic assembly consists of theHaldex Clutch Pump V181, the oil filter, theaccumulator, and the Haldex Clutch Control ValveN373.Haldex Clutch Pump V181The Haldex Clutch Pump V181 is a reciprocatingpiston pump and is installed in the lower sectionof the all-wheel drive clutch. It generates the oilpressure. The accumulator in the oil circuit is filledregularly. It is requested by the All Wheel DriveControl Module J492 depending on the demand.Compressed OilIs DischargedS414_046FunctionThe bores of the cylinder housing each contain apiston with a locating pin and a return spring. Withthe help of an angular ball bearing, the piston andlocating pin are moved in stroke fashion when thecylinder housing turns so that oil is drawn in at thebottom and is discharged compressed at the topafter 180 degrees of rotation.Oil IsDrawn InCylinderHousingBallBearingTo AccumulatorEffects of FailureWhen the Haldex Clutch Pump V181 fails, oilpressure cannot be generated. Torque is no longertransferred to the rear axle.PistonLocating PinOil FilterFrom OilReservoirReturn SpringS414_022The oil filter is a no-maintenance fleece filter. A checkvalve is integrated in the oil filter housing whichprevents the oil pressure to the Haldex Clutch PumpV181 from dropping.12