Valve operation control device for internal combustion engine

Details Valve operation control device for internal combustion engine Valve operation control device for internal combustion engine

1988-06-23

1989-10-31

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9016, 123198D, F01L 902, F01L 134

Patent

active

048769959

ABSTRACT:
Method and apparatus are described for determining the operability, or lack thereof, of a hydraulic pressure-operated selective coupling mechanism for operating an intake valve or an exhaust valve of an internal combustion engine during various modes of engine operation wherein a control means employed to operate the control valve effective for supplying hydraulic pressure to the mechanism is imparted with an indication of the selected mode of intake or exhaust valve operation and of the hydraulic pressure supplied to the mechanism and is operative to compare such indications to determine whether or not they coincide.

REFERENCES:
patent: 4111165 (1978-09-01), Aoyama et al.
patent: 4485777 (1984-12-01), Nakagami et al.
patent: 4683854 (1987-08-01), Goulet
patent: 4741306 (1988-05-01), Watanabe et al.
patent: 4759322 (1988-07-01), Konno
patent: 4768471 (1988-09-01), Draxler et al.
patent: 4788946 (1988-12-01), Inoue et al.
patent: 4790274 (1988-12-01), Inoue et al.

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