Relationship between Engine Speed and Clutch

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Relationship between Engine Speed and Clutch Function (Starting)

Further Information - Concrete Example

Engine Speed

Clutch Cylinder - Pressure in kg/cm2

Clutch Position Obtained

Hydraulic Block Gear Selector Position

OBSERVATIONS

in RPM

Referred to as

Irrelevant or Engine Stopped

60 to 65

Disengaged

Neutral

Vehicle stationary

c.550

Normal Idle

c.30

Disengaged

Gear Selected Irrelevant

Foot on brake - for example, vehicle ready to start

c.725

"Biting" Point

c.23

"Biting" - The discs come into contact

1st (For example)

Brakes released. The vehicle starts to move.

c.925

Fast Idle

c.10

"Biting" more significantly than above

1st (For example)

Vehicle continues to advance (Transmission of more torque than above)

c.1200

 

0

Totally Engaged

1st (For example)

Foot on Accelerator. Maximum torque transmitted.

Note: The pressures are not correct for all DS vehicles but are typical.

- the passage from 550rpm to 925rpm is done automatically by taking the foot off the brake pedal connected to the idle speed corrector.