Device for changing the control times of gas exchange valves of an internal combustion engine, especially regulating mechanism for regulating the rotary piston rotation angle of a camshaft relative to a crankshaft.

摘要

Device for changing the control times of gas exchange valves of an internal combustion engine, especially regulating mechanism rotary piston to regulate the rotation angle of a camshaft relative to a crankshaft, with the following characteristics: - the device (1) it is fixed to the end of the drive side of a camshaft mounted in the cylinder head of the internal combustion engine and is configured in principle as a controllable hydraulic servo depending on different operating parameters of the internal combustion engine, - the device (1) substantially consisting of a drive wheel (2) which is in drive connection with a crankshaft of the internal combustion engine and an impeller (3) connected rotationally with a camshaft of the engine internal combustion, - the drive wheel (2) has a cavity formed by a wall Periferic a hollow cylindrical (4) and two side walls (5, 6), in which cavity is formed at least one chamber hydraulic working (9) by at least two walls radial limitation (7, 8), - the wheel pallet (3) has at the perimeter of the hub (10) at least one vane (11) extending radially into a working chamber (9) of the drive wheel (2) and which divides this chamber into a respective pressure chamber (12) and a respective pressure chamber B (13), - under a biasing discretionary or simultaneous pressure in a hydraulic pressure medium, the pressure chambers (12, 13) cause a pivoting movement or immobilisation of the impeller (3) relative to the drive wheel (2) and therefore of the camshaft relative to the crankshaft, - the impeller (3), when falling below a pressure pressure medium required for regulation, it can be coupled mechanically with a wheel ccionamiento (2) by an element separate locking (14) in a position preferred base within its control range, - the locking element (14) is arranged in a bore of the impeller (3) parallel to the axis longitudinal means of the device (1) and can be moved by a spring element (15) towards a locked position inside a housing (16) of one of the side walls (5, 6) of the drive wheel (2) - the housing (16) of the locking element (14) is connected to at least one pressure chamber (12 or 13) within the device (1), so that, under biasing pressure of the pressure chamber ( 12 or 13), the locking element (14) can be moved hydraulically into an unlocked position within the bore of the impeller (3), - the locking element (14) being configured as a pin uniformly cylindrical locking throughout its length and the latter being disposed in an axial bore (17) of the hub (10) of the impeller (3) whose longitudinal axis has a as small as possible distance to the longitudinal axis of the device (1), characterized in that - the housing (16 ) of the locking element (14) has on one of the side walls (5, 6) of the drive wheel (2) a contour quadrangular configured on its surface with a larger size as a omnilateral clearance defined that the surface of the cross section of the locking element (14), and said housing is formed with a slot mouth (18) the type of worm for feeding pressure medium, - which is connected exclusively with a camera a pressure (12) of the device (1) which is unpressurized in the locked position of the impeller (3) and through which the housing (16) of the locking element (14) can be appli Tado pressure with hydraulic pressure medium only if there is a pressure biasing the pressure chambers A (12).