Patent ID: 8459221
Filing Date: 2013-06-11
Classification: F01L

Abstract:
1. A device for variably adjusting control times of gas exchange valves of an internal combustion engine, comprising: a driving element; an output element; at least one pressure chamber; at least one mechanism limiting an angle of rotation and configured to have a minimum response pressure; and at least one pressure accumulator that is configured to have a minimum response pressure, wherein a phase angle between the output element and the driving element can be changed within a maximum possible angular spread by delivering to or discharging pressure medium from the pressure chamber, wherein each mechanism limiting the angle of rotation, in a locked state, limits the phase angle at least to an angular spread which is less than a maximum possible angular spread, wherein the mechanism limiting the angle of rotation can be transferred into an unlocked state through an application of pressure medium via a control line, and whereby the pressure accumulator communicates at least temporarily with the control line during operation of the internal combustion engine, and wherein the minimum response pressure of the mechanism limiting the angle of rotation is greater than the minimum response pressure of the pressure accumulator so that the mechanism limiting the angle of rotation does not disengage in case of pressure peaks.