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Adjustable camshaft

A camshaft, adjustable technology for cams, belts/chains/gears, engine components, etc. to solve manufacturing errors, rotor jams, etc.

Active Publication Date: 2017-06-13
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With very tight tolerances in the phase shifter, due to manufacturing errors, even small manufacturing errors of the tilt position or inner shaft can now occur, causing the rotor to jam relative to the stator

Method used

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Examples

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Embodiment Construction

[0021] correspond Figure 1 to Figure 5 , the camshaft 1 according to the invention comprises an inner shaft 2 and an outer shaft arranged coaxially with the inner shaft 2 . The adjustment of the inner shaft 2 relative to the outer shaft 3 takes place in this case by means of a phase shifter 4, the stator 5 of which is connected to the outer shaft 3 in a rotatably fixed manner, and the The rotor 6 is connected to the inner shaft 2 in a rotationally fixed manner. Such camshafts 1 are commonly used in internal combustion engines 7 , for example in motor vehicles, in order to influence the valve opening times.

[0022] In the case of the camshafts known hitherto from the prior art, the inner shaft 2 is connected in a fixed manner to the rotor 6 and the outer shaft 3 is connected in a fixed manner to the stator 5 of the phase shifter 4, wherein the rotor 6 is even opposite A small tilted position with respect to the inner shaft 2 would lead to jamming of the rotor 6 relative to ...

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PUM

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Abstract

An adjustable camshaft(1) may include an inner shaft(2) and an outer shaft(3) arranged coaxially thereto, and a phase shifter(4) having a stator(5) and a rotor(6). The stator(5) may be connected to the outer shaft(3) in a rotationally fixed manner, and the rotor may be connected to the inner shaft(2) in a rotationally fixed manner. On an outside of the outer shaft(3), a first connection contour(8) may be provided. The first connection contour may interact with a second connection contour(9) on the stator(5) formed complementarily thereto in a form-fit manner and enabling at least a tolerance offset in an axial direction(10).

Description

technical field [0001] According to the preamble of claim 1 , the invention relates to an adjustable camshaft having an inner shaft and an outer shaft arranged coaxially with said inner shaft. The invention furthermore relates to an internal combustion engine having at least one camshaft. Background technique [0002] Adjustable camshafts have long been used in current internal combustion engines and are used to control valve opening times. By twisting the inner shaft relative to the outer shaft, a first cam rotatably fixed to the inner shaft can be twisted relative to a second cam rotatably fixed to the outer shaft and thereby lengthen or shorten the valve opening time or valve closing time. The relative twist of the inner shaft with respect to the outer shaft is usually produced by so-called phase shifters, the rotor of which is rotatably fixed to the inner shaft and the stator of which is rotatably fixed connected to the external shaft. In the case of camshafts known ...

Claims

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Application Information

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IPC IPC(8): F01L1/047F01L1/344
CPCF01L1/047F01L1/34413F01L2001/0473F01L1/3442F16H53/04
Inventor 尤尔根·隆梅尔
Owner MAHLE INT GMBH
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