Valve trains for internal combustion engines

A valve train, internal combustion engine technology, applied in the direction of machine/engine, mechanical equipment, engine components, etc., can solve problems such as disadvantages

Inactive Publication Date: 2021-01-12
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the valve trains known from the prior art, in particular their complex and thus expensive actuating devices which additionally have a relatively long response time are generally disadvantageous

Method used

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  • Valve trains for internal combustion engines
  • Valve trains for internal combustion engines
  • Valve trains for internal combustion engines

Examples

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Embodiment Construction

[0021] according to figure 1 and figure 2 , the valve train 1 according to the invention for an internal combustion engine 2 which is only indicated has a camshaft 3 and a cam follower 4 . A first cam 5 a and an axially adjacent second cam 5 b are arranged in a torque-resistant manner on the camshaft 3 here, said cams having different cam profiles. For example, one of the two cams 5a, 5b can have only a base circle and thus no cam lobe, so that separation via its cylinder is possible. In order to be able to change between the cam profiles of the two cams 5a, 5b, the cam follower 4 is axially adjustable, ie with respect to the axial direction of the camshaft 3 and ie between a first position and a second position , in the first position, it is drivenly or respectively operatively connected with the cam 5a (see figure 1 ), in said second position, it is drivenly or respectively operatively connected with the second cam 5b (see figure 2 ). An adjusting device 7 is also pro...

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PUM

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Abstract

The invention relates to a valve train (1) with a camshaft (3) and an axially adjustable cam follower (4), with a first torque-proof mounted on the camshaft (3) The cam ( 5 a ), as well as the second cam ( 5 b ), it is necessary for the present invention to provide an adjusting device ( 7 ) for the axial adjustment of the cam follower ( 4 ), the adjusting device having in the base position and switching First and second mechanical engagement elements (8a, 8b) respectively adjustable between positions, in the base position there is no contact with the associated sliding guide (9a, 9b), while in the switched position the associated engagement element (8a) , 8b) cooperating with the associated sliding guides (9a, 9b), each engagement element (8a, 8b) having a spring (10a, 10b) preloading the engagement element (8a, 8b) to its switching position, providing There are braking means (11) holding the associated engaging elements (8a, 8b) in their home position in the locked position, and associated actuators (13) are provided for releasing said braking means (11).

Description

technical field [0001] The invention relates to a valve train for an internal combustion engine with a camshaft and with a cam follower. The invention also relates to an internal combustion engine with such a valve train. Background technique [0002] From DE 199 45 340 A1 is known a general valve train for an internal combustion engine with a camshaft and with a cam follower, wherein a first cam is arranged on the camshaft in a torque-proof manner and axially connected to said first cam Adjacent to the second cam. The cam follower is hereby itself axially adjustable between a first position, in which the cam follower is connected to the first cam, and a second position, in which the cam follower is connected to the first cam. Second cam connection. [0003] With an adjustable, conventional valve train comprising two cams of different cam strokes, the cylinders of the internal combustion engine can be operated in two different operating modes. If, instead of two cams wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/12F01L1/047
CPCF01L1/047F01L1/12F01L1/185F01L13/0036F01L2013/101F01L2305/00F01L2820/032F01L1/46F01L1/0532F01L13/0063F01L2001/0473F01L2001/0478F01L2013/0052
Inventor 佩尔·尼卡皮埃德加·萨尔弗德
Owner MAHLE INT GMBH
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