Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1994-07-13
1995-11-07
Yuen, Henry C.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
251285, 13762415, F01L 1300
Patent
active
054639875
ABSTRACT:
A variable valve timing mechanism for controlling at least one biased valve comprising a guide assembly having a mounting surface and a spaced apart upper guide surface. The guide assembly includes spaced apart longitudinal guides; a closing stop positioned on the mounting surface and a stop surface. An opening stop is positioned on the guide assembly and has a stop surface. A valve activator is movably positioned within the guide assembly and in operable contact with the biased valve. The valve activator has first and second stop surfaces to contact a respective closing stop and opening stop, and includes an angled contact surface. A drive ram is movably positioned within said guide assembly and in contact with the upper guide surface and the valve activator. The drive ram has an angled drive surface positioned for contacting the valve activator and is connected to a drive for imparting reciprocating motion thereto. The drive is synchronized with the operation of the valve.
REFERENCES:
patent: 2260983 (1941-10-01), Walker
patent: 3911879 (1975-10-01), Altmann
patent: 4138973 (1979-02-01), Luria
patent: 4414931 (1983-11-01), Burandt
patent: 4484546 (1984-11-01), Burandt
patent: 5119773 (1992-06-01), Schon et al.
patent: 5165370 (1992-11-01), Beaumont
Lo Weilun
Yuen Henry C.
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