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Valve train for an internal combustion engine

A valve mechanism, internal combustion engine technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve disadvantages and other problems

Inactive Publication Date: 2017-12-29
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 train for an internal combustion engine
  • Valve train for an internal combustion engine
  • Valve train for an internal combustion engine

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Embodiment Construction

[0022] according to figure 1 with 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 pr...

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Abstract

A valve train may include a camshaft having first and second slide guides, first and second cams mounted axially adjacent in torque-proof manners on the camshaft, and a cam follower adjustable between a first position, in which the cam follower is drivingly connected with the first cam, and a second position, in which the cam follower is drivingly connected with the second cam. The valve train may also include an adjustment arrangement having adjustable mechanical first and second engagement elements for axially adjusting the cam follower between first and second positions. Each engagement element may be adjustable between basic positions, in which no contact exists with a respective one of the slide guides, and switching positions, in which the respective engagement element cooperates with the slide guide. Each engagement element may have a spring that prestresses it into the switching position. The valve train may further include an arresting device and an actuator for each engagement element, wherein the arresting device, when in a locked position, holds the associated engagement element in the basic position, and the actuator releases the arresting device.

Description

technical field [0001] According to the preamble of claim 1 , the invention relates to a valve train for an internal combustion engine having a camshaft and having 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 op...

Claims

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Application Information

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Patent Type & Authority Applications(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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