| 摘要 |
PCT No. PCT/DE90/00818 Sec. 371 Date Jun. 18, 1991 Sec. 102(e) Date Jun. 18, 1991 PCT Filed Oct. 26, 1990 PCT Pub. No. WO91/08383 PCT Pub. Date Jun. 13, 1991.An electrohydraulic valve control device for internal combustion engines in which a tappet volume for operating a valve piston arranged between an actuating cam operated cam piston and an engine valve can be reduced via a solenoid valve which is arranged in a drain passage. Arranged in this drain passage is a shut-off valve which is hydraulically actuated to open only when the valve piston has carried out a minimum stroke. This minimum stroke corresponds to a torque angle range of the camshaft in degrees of rotation during the opening actuation, in which, due to the shut-off valve, a control by the solenoid valve is not possible, whereby despite overlapping of engine valve opening times in a multi-cylinder engine, any overlapping of control times for the drain passages of individual engine valves, predetermined by the solenoid valve is prevented.
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