| 摘要 |
The invention relates to a device (10) for variably adjusting control times of gas exchange valves (9a, 9b) of an internal combustion engine (1). Said device comprises a drive element (22), an output element (23), a rotation angle limiting device (42, 43) and a control valve (37). At least two counter-working pressure chambers (35, 36) are also provided. Phase adjustment between the output element (23) and the drive element (22) can be initiated by applying pressure to one of the pressure chambers (35, 36) whilst simultaneously discharging the other pressure chamber. Said rotation angle limiting device (42, 43) prevents the phasing from altering when in the locked state and said rotational angle limiting device (42, 43) allows the phasing to be altered when in the unlocked state. Said rotational angle limiting device (42, 43) can be transferred from the locked state into the unlocked state due to pressure. Said control valve (37) comprises a valve housing (52) and a control piston (54). An inflow connection (P), at least one outflow connection (T), a control connection (S) and two working connections (A, B) are embodied on the valve housing (52). The inflow connection (P) is connected to the pressure source (47), the outflow connection (T) is connected to the tank, the control connection (S) is connected to the rotational angle limiting device (42, 43) and the working connections (A, B) are connected, respectively to one of the pressure chambers (35, 36) and the control valve (37) is arranged in a central receiving area (40) of the output element (23). |
