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Valve drive for an internal combustion engine

A transmission device, internal combustion engine technology, applied in valve drive device, valve device, machine/engine, etc., can solve the problems of tolerance and expensive tooth manufacturing, and achieve the effect of reducing manufacturing cost, reducing quality, and avoiding tooth noise.

Inactive Publication Date: 2020-01-17
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of the toothing is expensive and has tolerances, which, in addition to economic disadvantages, also have acoustic disadvantages

Method used

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  • Valve drive for an internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 A top view of a valve train 1 according to the invention for a cylinder head 16 of an internal combustion engine (not shown in detail) is shown.

[0017] The cylinder head 16 is shown without a valve cover, so that a free view of the valve train 1 is obtained. The cylinder head 16 is provided for a four-cylinder internal combustion engine and has an intake side with two first valve trains 1 according to the invention, of which only one first valve train is marked with the symbol out. On the exhaust side, the cylinder head 16 has a single second exhaust camshaft 12 for all four cylinders. On the intake side, a valve train 1 according to the invention is provided for each of the two cylinders. Only one valve train on the intake side is indicated. The first camshaft 4 is rotatably mounted in a first camshaft bearing 2 and a second camshaft bearing 3 , wherein only the bearing seats in the cylinder head 16 with unlabeled threaded connection holes are shown.

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Abstract

The invention relates to a valve drive for an internal combustion engine, comprising a first camshaft which is rotatably mounted in a first and a second camshaft bearing and which comprises at least one cam with a first cam curve and a second cam curve that differs from the first cam curve, wherein a gas exchange valve can be actuated by the first or the second cam curve; a camshaft section is provided, by means of which the cam can be moved by an adjusting means such that the gas exchange valve can be actuated either via the first or the second cam curve; the first camshaft and the cam have afixed position relative to each other; and the first camshaft can be axially moved in the first and the second camshaft bearing. By means of the valve drive design according to the invention, a substantial reduction of production costs is achieved compared to the prior art and undesired toothing noises are prevented.

Description

technical field [0001] The invention relates to a valve train for an internal combustion engine having the features of the preamble of claim 1 . Background technique [0002] For technical environments reference is made for example to European patent application EP0595060A1. From this patent application a valve train of an internal combustion engine is known, which has a prestressed sliding cam which is axially displaceable on a camshaft. The sliding cam is movable from its first position interacting with a first convex curve on the intake valve to its second position interacting with a second convex curve on the intake valve. In the first position, the sliding cam rests positively against the abutment of the transfer element connected between the intake valve and the sliding cam, provided that the sliding cam rests with a section on the abutment. operate in the area. When the base circle of the sliding cam is reached, the sliding cam is moved into the second position. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/02F01L13/00F01L1/047
CPCF01L1/026F01L1/047F01L13/0036F01L2001/0475F01L2001/0537F01L2013/0052
Inventor G·埃默斯伯格D·克诺尔R·克拉夫特R·施密德T·施泰因勒
Owner BAYERISCHE MOTOREN WERKE AG