Electrically driven camshaft adjuster

Abstract

The invention relates to an adjusting device (1) of adjusting the relative rotation angle position of a camshaft (3) relative to a crankshaft. Said adjusting device comprises a drive element (4) which is stationarily mounted on the crankshaft and a drive element (5) which is stationarily mounted on the camshaft. The adjusting device (1) comprises an adjusting motor (2) as the primary adjusting device and an auxiliary drive (11) as the secondary adjusting device. When the adjusting motor (2) fails, the camshaft (3) can be adjusted to a stationary rotation angle position, an emergency operation position, by means of the auxiliary drive (11).

Description

technical field

[0001] The invention relates to an adjusting device for adjusting the relative angular position of the camshaft relative to the crankshaft in an internal combustion engine having a gear box designed as a three-shaft transmission, said gear box having a driving element fixed on the crankshaft and a camshaft fixed on the A follower on the shaft, and an adjustment shaft connected to the adjustment motor shaft of the adjustment motor. Background technique

[0002] In order to ensure reliable engine starting in internal combustion engines with hydraulic or electrical camshaft adjustment systems, the camshaft must be in the so-called reference position or emergency running position. This position is usually "retarded" on the intake camshaft and "early" on the exhaust camshaft. During normal operation of the vehicle, the camshaft is adjusted to the corresponding reference position when the engine is switched off and held or locked there.

[0003] Conventional hydr...

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