Get Oil circuit ? hydraulic system -> Clutch operation Guide for Volkswagen Touran 4 Door First Generation (2003-2015)

Oil circuit – hydraulic system

Clutch operation

To actuate the clutches, the mechatronic electronic

control unit actuates the solenoid valve

How it works

Actuation of K1 is shown here as an example.

● N435 valve 3 in gear train half 1 for clutch K1 and

● N439 valve 3 in gear train half 2 for clutch K2.

Clutch not actuated

The clutch actuator piston is in the resting position.

The solenoid valve N435 is open in the return flow

direction. The oil pressure from the gear train half

pressure control valve N436 flows into the

mechatronic unit's oil reservoir.

N435

Clutch actuator K1 in resting position

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Clutch actuated

If clutch K1 is to be actuated, the solenoid valve N435

is actuated by the electronic control unit. When

actuated, it opens the oil channel to the clutch

actuator, and oil pressure is built up at the rear of

the clutch actuator piston. The clutch actuator piston

moves and thereby actuates the K1 clutch engaging

lever. Clutch K1 is closed. The control unit receives a

signal regarding the precise position of the clutch via

clutch travel sender 1 G167.

Clutch slip, the speed difference between the gearbox

input speed and drive shaft speed, is achieved by

solenoid valve N435 by controlling the oil pressure

between the clutch actuator and the return flow.

N435

Clutch actuator K1 actuated

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Oil circuit ? hydraulic system -> Clutch operation for Your Volkswagen Touran 4 Door First Generation (2003-2015)