Valve trains for internal combustion engines

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

Inactive Publication Date: 2020-12-08
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, a disadvantage of the valve trains known in the prior art is that the latter require an actuator for transferring the cam follower from its first position to its second position, wherein such actuators are not only relatively expensive (especially in relation to their component costs), and additionally require not to be underestimated installation space requirements, which are increasingly becoming a problem especially in the area of ​​narrow engine compartments

Method used

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

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Embodiment Construction

[0020] according to Figure 1 to Figure 3 , a valve train 1 of a not shown internal combustion engine 2 according to the invention has a camshaft 3 and a cam follower 4 . A first cam 5 a and a second cam 5 b are here arranged in a torque-resistant manner on the camshaft 3 , the cam profile of which cams can alternatively be picked up by the cam follower 4 and transferred to the associated valve, for example of the cylinder. Inlet valve or outlet valve. In this case, the two cams 5 a , 5 b have different cam profiles, wherein theoretically, for example, the cam 5 b can consist only of a base circle and thus cause the cylinders to separate.

[0021] In the first position, the roller 6 of the cam follower 4 picks up the cam profile of the cam 5a, while in the second position the roller 6 of the cam follower 4 is drivingly connected to the second cam 5b and thus picks up its profile. The roller 6 is here rotatably mounted on a roller needle 7 . According to the invention, an ad...

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Abstract

The invention relates to a valve train (1) with a camshaft (3) and a cam follower (4), with a first cam (5a) mounted in a torque-resistant manner on the camshaft (3), and A second cam (5b) arranged in a torque-resistant manner and axially adjacent to the first cam (5a), wherein the cam follower (4) is drivingly connected to the first cam (5a) in a first position , and is drivingly connected to the second cam (5b) in the second position. It is essential for the invention here that, for adjusting the engagement elements (8a, 8b), a control shaft (11) or a control slide (12) is provided, which in the first position forms an opening for the first engagement element (8a). stop, and at least in the second position form a stop for the second engagement element (8b), and thereby adjust the first engagement element (8a) to its switching position in the first position, and in the second The position adjusts the second engagement element (8b) to its switching position.

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] Known from DE19945340A1 is a general valve train for an internal combustion engine with a camshaft and with a cam follower, also with a first cam mounted on the camshaft in a torque-resistant manner and with a torque-resistant arrangement And a second cam axially adjacent to the first cam. In this case, the cam follower is drivingly connected to the first cam in a first position and is drivingly connected to the second cam in a second position. [0003] However, a disadvantage of the valve trains known in the prior art is that the latter require an actuator for transferring the cam follower from its first position to its second position, wherein such actuators are not only relatively expensive (especially in relation to thei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/00
CPCF01L13/0036F01L1/047F01L2013/10F01L1/18F01L2305/00F01L2820/032F01L1/46F01L1/0532F01L13/0063F01L2001/0473F01L2001/0478F01L2013/0052F01L1/181
Inventor 帕特里克·奥尔瑟戴维·莫茨科佩尔·尼卡皮
Owner MAHLE INT GMBH
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