Closed loop electric valve control for I. C. engine

Details Closed loop electric valve control for I. C. engine Closed loop electric valve control for I. C. engine

1989-11-27

1990-09-18

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

731181, 25112905, F01L 904

Patent

active

049570749

ABSTRACT:
The actual lift of a valve is monitored by a lift sensor that is coupled to an electronic valve controller by a lift signal processing circuit, and the electronic valve controller issues a control signal that is calculated to secure as faithful correspondence as possible of this lift signal to a command signal that the electronic valve controller receives from an electronic engine management controller. The processing circuit functions to disclose to the electronic valve controller the actual opening and closing instants of the valve in a manner that amounts to the sensor being precisely re-calibrated each time that it closes.

REFERENCES:
patent: 3682152 (1972-08-01), Muller-Berner
patent: 3935846 (1976-02-01), Zelenka
patent: 4544986 (1985-10-01), Buchl
patent: 4706619 (1987-11-01), Buchl
patent: 4782798 (1988-11-01), Jones
patent: 4836016 (1989-06-01), Nakano et al.

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