Controller for valve especially internal combustion engine gas exchanging valve

Abstract

The aim of the invention is to enable in a valve lifting movements with valve elevation curves in a mechanically simple manner using a control device, said valve lifting movements consisting of a main valve lift curve, the embodiment of which is variable, and at least one variable additional valve elevation curve. The phase position between the main and additional valve elevation curves can also be modified. A control device is thus provided in order to actuate at least one valve, particularly a gas exchange valve of an internal combustion engine, wherein: the valve lift movement of the at least one valve (6) is produced by superimposing two synchronously rotating cam profiles which mechanically act upon a lift actuating element (4), i.e. a first cam profile (1) and a second cam profile (2) and can be modified by phase displacement between said two cam profiles (1,2) and the two cam profiles (1,2) are provided with specially formed areas enabling at least one additional valve lift (ZV) to be generated by means of the superimposition thereof at the level of at least one of the two cam profiles (1,2) as a whole, respectively via the main valve lift movement (HV) produced by means ofa full rotation of said cam profiles (1,2). The at least one additional valve elevation curve (ZV) can be modified in form and allocation to the main valve elevation curve (HV) by phase displacementsbetween the two cam profiles (1,2).

Description

Controllers for valves, especially gas exchange valves of internal combustion engines technical field The invention relates to a controller for controlling at least one valve, in particular a gas exchange valve of an internal combustion engine, wherein a valve lift movement of at least one valve can be produced by superimposing at least two synchronously rotating cam profiles, namely a first cam profile and The second cam profile acts mechanically on the lifting operating element and can be varied by a phase shift between these two cam profiles. Background technique Such a device has been described in the earlier German patent application PCT / DE2004 / 000079. However, with the cam profiles disclosed in this patent, in virtually any desired manner, only a single valve with a single The valve lift of the displacement curve moves, and it is not possible to change the shape and course of this lift. German patent DE19733322A1 describes a valve controller with an additional val...

AI Technical Summary

Problems solved by technology

This combination of mechanical and hydraulic units has a very complex design with multiple functional elements and is therefore very prone to failure

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