Internal combustion engine valve drive device for a motor vehicle

摘要

In an internal combustion engine valve drive device having at least one switch gate for valve lift switching by converting a rotation of at least a first and a second cam element into an axial movement by first and second actuators provided for axially displacing the first cam element and the second cam element in a first switching direction via an operative connection of the first actuator with the switch gate and the second actuator provided for axially displacing the second cam element in the same switching direction via an operative connection with the switch gate, the device including a control unit controlling the axial displacement of the first and second cam elements in the same switching direction under the control unit by actuating the first and second actuators at the same time.

主权项

1. An internal combustion engine valve drive device for a motor vehicle, having at least one camshaft (24a, 24b) which includes at least first and second cam elements (12a, 13a, 12b, 13b) with gate tracks (31a, 32a, 33a, 34a, 31b, 32b, 33b, 34b) for lift switching of valves of the internal combustion engine by converting a rotary motion (11a; 11b) of the cam elements (12a, 13a; 12b, 13b) into an axial motion (14a; 14b), each cam element (12a, 13a; 12b, 13b) being provided with a first actuator (15a, 17a; 15b, 17b) for axially displacing the first cam element (12a, 12b; 13a, 13b) in one switching direction (16a; 16b), and a second actuator (20a, 22a; 20b, 22b) for axially displacing a second cam element (13a; 13b) in an opposite switching direction (21a, 21b), and a control unit (18a; 18b) for controlling an axial displacement of the first and second cam elements (12a, 13a; 12b, 13b) in the said one switching direction (16a; 16b), the control unit (18a; 18b) being provided for simultaneously initiating an axial displacement of the first actuators (15a, 17a; 15b, 17b) and an axial displacement of the second actuators (20a, 22a, 20b, 22b).