C 230 (202.023) L4-2.3L (111.974) (1998)
Camshaft: Description and Operation
Camshaft Adjuster
NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.
Task Of Camshaft Adjuster
The task of the camshaft adjuster is to:
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educe the quantities of residual gas by creating smaller valve overlaps at idling speed and up to 1200 rpm ("retarded" position)
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Reduce unburned mixture losses at engine speeds of 1200-4300 rpm ("advanced" position)
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Improve the charge (boost effect) from an engine speed of 4300 ram Retarded position)
Function Of Camshaft Adjuster
When the engine is running, the camshaft adjuster (75) rotates the inlet camshaft (78) hydraulically/mechanically relative to the camshaft sprocket
by 20° crank angle or 10° cam angle, respectively. toward the "advanced" position and back into the "retarded" position.
The camshaft adjuster is actuated electromagnetically by the control module.
The adjustment time of about 1 second is dependent on the engine oil pressure at the camshaft adjuster and the oil viscosity and oil temperature.