Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1991-03-14
1991-12-31
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
123 9015, F01L 904, F01L 134
Patent
active
050762222
ABSTRACT:
A control system for controlling intake and exhaust valves of an internal combustion engine includes an electromagnetic actuator means for electromagnetically operating the intake and exhaust valves. The electric power to be supplied to the electromagnetic actuator means is controlled depending on the rotational speed of the engine such that it will be smaller when the engine rotational speed is lower and larger when the engine rotational speed is higher, so that the area in which the intake and exhaust valves are open increases as the engine rotational speed increases. With this arrangement, the intake and exhaust efficiencies are increased in the full range of engine rotational speeds.
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Cross E. Rollins
Isuzu Motors Limited
Lo Weilun
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