Arrangement for controlling a device for changing the valve timi

Details Arrangement for controlling a device for changing the valve timi Arrangement for controlling a device for changing the valve timi

1998-08-21

2000-05-02

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, 464160, F01L 1344

Patent

active

060559500

ABSTRACT:
An arrangement for controlling a device for changing the control times of gas exchange valves of an internal combustion engine is provided. The device includes a hydraulic pressure cylinder with an axially movable piston the setting motions of which are transformed into relative rotation of a drive part of the pressure cylinder connected to the crankshaft in relation to a drive part of the pressure cylinder connected to the camshaft. the hydraulic pressure cylinder is subdivided by the piston into two pressure chambers (3, 4), with each being provided with a pressure medium connection (5, 6) to which a hydraulic pump (7) is connected upstream and a pressure medium reservoir (8) is connected downstream, and whose pressure medium inflow or pressure medium outflow is controlled by a hydraulic valve arrangement controlled by a motor controller (9).

REFERENCES:
patent: 5520145 (1996-05-01), Nagai et al.
patent: 5615648 (1997-04-01), Ruoff et al.

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