Electrically driven camshaft adjuster

A technology of adjusting device and camshaft, applied in valve device, engine element, machine/engine, etc., to achieve the effect of simple structure and improved fail-safety

Inactive Publication Date: 2007-06-20
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, however, the indication of reaching the referen

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  • Electrically driven camshaft adjuster
  • Electrically driven camshaft adjuster
  • Electrically driven camshaft adjuster

Examples

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Embodiment Construction

[0042] An embodiment of the invention is shown in FIG. 1 as an adjusting device with a variable-speed gearbox 13 and an adjusting motor 2 consisting essentially of a rotor 8 and a stator 9 . The adjusting device serves to adjust the angular position between the crankshaft and the camshaft 3 in an internal combustion engine (not shown). The transmission gearbox 13 is designed as a three-shaft transmission with a driving element 4 , a driven element 5 and an adjusting shaft 6 . The driving element 4 is fixedly connected with the drive wheel 7 and the crankshaft through an unshown gear, toothed belt or toothed chain. The driven part 5 is fixedly connected to the camshaft 3 and the adjusting shaft 6 to the rotor 8 of the adjusting motor 2 . The stator 9 of the adjusting motor 2 is fixedly connected to the cylinder head 10 and is at rest. Camshaft 3 has a reference position or emergency running position which must be reached for reliable starting and limited operation. Since the...

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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...

Claims

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Application Information

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IPC IPC(8): F01L1/34F01L1/352F01L1/46
CPCF01L2001/34473F01L2800/12F01L1/352F01L1/344F01L2820/032
Inventor 延斯·舍费尔迈克·科尔斯马丁·施泰格瓦尔德乔纳森·海伍得
Owner SCHAEFFLER TECH AG & CO KG
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