Valve drive for an internal combustion engine

Abstract

The invention relates to a valve drive (1) for an internal combustion engine, wherein the valve drive (1) comprises a camshaft (2) and at least one cam follower (3). In this context, the camshaft (2)comprises at least one cam set (4, 5) with a first cam (4a, 5a) and with a second cam (4b, 5b). The valve drive (1) further comprises at least one adjustment device (6) with a first adjustable engagement element (6a) and with a second adjustable engagement element (6b), each of which is respectively associated with a first slot guide (7a) that interacts with a second slot guide (7b). The valve drive (1) further comprises at least one control shaft (9) with at least one control element group (10) comprising a first control element (10a) and a second control element set (10b). According to the invention, the first control element (10a) and the second control element (10b) are rotatable relative to the control shaft (9) such that the first control element (10a) is capable of adjusting the first adjustable engagement element (6a) and the second control element (10b) is capable of adjusting the second adjustable engagement element (6b). The control element can be designed in the form of a control cam (12), an adjustment lever (25) or a rotary lever (28).

Description

technical field [0001] According to the preamble of claim 1 , the invention relates to a valve drive for an internal combustion engine with a camshaft and with a cam follower. Background technique [0002] A general valve drive for an internal combustion engine is known which has a camshaft with at least one cam follower and a cam set fixed on the camshaft in a non-rotatable manner with a first cam And with a second cam axially adjacent to said first cam. In this case, the cam follower is drivingly connected in a first position to the first cam of the respective cam set and in a second position to the second cam of the respective cam set. Via the adjusting device, the cam follower can be switched between a first position and a second position and thus activate or deactivate the corresponding cylinder of the internal combustion engine. For controlling the regulating device, valve drives known from the prior art comprise a control shaft, which is mounted possibly rotatably a...

AI Technical Summary

Problems solved by technology

[0003] In the case of the control shafts known from the prior art, however, it is disadvantageous that the adjusting device can only be actuated by complex movement sequences (eg rotation combined with axial displacement)

This not only results in longer firing times, but also increases manufacturing and repair costs

Moreover, separate activation of the individual cylinders cannot be achieved only by extensive effort

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