Method for controlling electromagnetic actuators for operating c

Details Method for controlling electromagnetic actuators for operating c Method for controlling electromagnetic actuators for operating c

1998-07-31

2000-06-13

Lo, Wellun

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

F01L 904

Patent

active

060735961

ABSTRACT:
A method for controlling the current supply to an electromagnetic valve for operating a cylinder (gas exchange) valve (6 and 7) in a piston-type internal combustion engine, wherein the interior cylinder pressure is detected at least for determining the time "valve opens", and the detected pressure is supplied to the engine control device (14) as a measuring signal. Thereafter the respective actual time of switching off the retaining current at the retaining electromagnet (9, 10), on the one hand, and switching on the capturing current at the capturing electromagnet (9, 10) on the other hand, are corrected as a function of the detected interior cylinder pressure.

REFERENCES:
patent: 4945870 (1990-08-01), Richeson
patent: 5190013 (1993-03-01), Dozier
patent: 5671705 (1997-09-01), Matsumoto et al.
patent: 5720242 (1998-02-01), Izuo

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