Internal-combustion engines – Starting device – Compression relieving type
Patent
1989-06-09
1990-01-09
Myhre, Charles J.
Internal-combustion engines
Starting device
Compression relieving type
123 9016, F01L 1308
Patent
active
048920681
ABSTRACT:
An internal combustion engine is provided with a mechanism to release engine compression at low speeds thereby facilitating starting of the engine. The engine has an exhaust valve which is operated by a valve lifter following a cam surface. A cam pin is positioned within a seat in that cam surface in a manner which allows the pin to rotate. A drive member is attached to the cam pin and has gear teeth in a peripheral edge. A flyweight has teeth which engage the gear teeth of the drive member and cause a rotation of the cam pin in response to engine speed. At relatively low engine speeds an eccentric portion of the cam pin extends above the cam surface so as to engage the valve lifter producing an opening of the exhaust valve during the compression portion of the engine cycle. At higher engine speeds the cam pin is rotated so that the eccentric portion of the cam pin no longer extends above the cam surface so that the exhaust valve is not opened during the engine compression. This operation automatically release of the compression at lower engine speeds.
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Kohler Co.
Lo Weilun
Myhre Charles J.
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