Device for the variable adjusting of the control timing of gas exchange valves of an internal combustion engine

Abstract

The invention relates to a device (11) for the variable adjusting of the control timing of gas exchange valves (9, 10) of an internal combustion engine (1) with a drive element (13), an output element (14), at least one pressure chamber (23) and a volume accumulator (31), wherein the output element (14) is arranged in a rotatable manner to the drive element (13), and the pressure chamber (23) is bordered at least partially by these components (13, 14), wherein a phase position between the output element (14) and the drive element (13) can be variably adjusted by the pressure medium supply to or pressure medium removal from the pressure chamber (23), wherein pressure medium lines (25a, b, p) are provided by means of which the pressure medium can be supplied to the pressure chamber (23) or removed therefrom, wherein the volume accumulator (31) has at least one housing (32); and a displaceable separating element (33) therein that separates a supply chamber (34), which connects to one of the pressure medium lines (25a, b, p), from a ventilated complementary space (35), wherein the separating element (33) is displaced in the housing (32) by the admission of the pressure medium in the supply chamber (34) in such a way that the volume of the supply chamber (34) increases at the expense of the complementary space (35).

Description

technical field [0001] The invention relates to a device for variably adjusting the valve timing of a gas exchange valve of an internal combustion engine, the device having a drive element, a driven element, at least one pressure chamber and a volume accumulator, wherein the driven element is capable of Arranged in a rotational manner relative to the driver, and the pressure chamber is delimited at least partially by these components, wherein the phase position (Phasenlage) between the driven part and the driver can be obtained by feeding pressure medium into the pressure chamber or by removing pressure medium from the pressure chamber. chamber output to be variably adjustable, wherein pressure medium lines are provided, via which pressure medium can be supplied to the pressure chamber or discharged from the pressure chamber, wherein the volume accumulator has at least one housing and a displaceable partition in the housing, which separates a reserve chamber communicating with...

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the embodiment shown is that, due to the tensioned pressure spring, the emptying of the volume accumulator starts already at a point in time when the volume flow supplied by the pressure medium pump is sufficient to ensure regulation

However, the pressure medium volume squeezed out of the volume accumulator in this phase is no longer available in those phases of the phase adjustment device in which there is a lack of supply.

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