Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1990-03-21
1990-12-04
Myhre, Charles J.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, F01L 104
Patent
active
049745603
ABSTRACT:
A device for varying optimally, throughout the operating range of an internal combustion engine, the duration of the processes of induction and exhaust. The device employing, within a common combustion chamber, two valves for each of the processes of induction and exhaust; each of the two valves being driven by a different camshaft; the two camshafts so employed being capable of variable angular indexing with respect to each other, and with respect to crankshaft revolution, by means of a camshaft indexing variator; the variable indexing so achieved causing variable indexing of the two valves relative to each other, whereby, for instance, one valve of a pair may be caused to open at an advanced indexing, relative to crankshaft revolution, and the other valve to open at a retarded indexing, relative to crankshaft revolution; the advanced opening point of one valve, and the retarded closing point of the other valve defining an extended duration of the process associated with the two valves.
REFERENCES:
patent: 4561390 (1985-12-01), Nakamura
patent: 4674452 (1987-06-01), Asanomi
patent: 4716864 (1988-01-01), Binder
patent: 4805566 (1989-02-01), Ampferer
patent: 4895113 (1990-01-01), Speier
Lo Weilun
Myhre Charles J.
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