Valve operating mechanism for internal combustion engines

Details Valve operating mechanism for internal combustion engines Valve operating mechanism for internal combustion engines

1987-11-18

1989-01-24

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9016, 123 9044, F01L 134, F01L 104

Patent

active

047994630

ABSTRACT:
A valve operating mechanism for an internal combustion engine having cams rotatable in synchronism with a crankshaft, a pair of valves disposed in intake or exhaust ports of a combustion chamber, and four pivotable rocker arms for transmitting the lifting motion of said cams to said valves. Four cams are provided with different cam profiles corresponding to respective ranges of rotational speeds of the engine. Switching means are operated by hydraulic oil pressure for selectively connecting and disconnecting the rocker arms to thereby operate the valves in several different modes for different engine speeds.

REFERENCES:
patent: 4523550 (1985-06-01), Matsuura
patent: 4612884 (1986-09-01), Ajiki et al.
patent: 4690110 (1987-09-01), Nishimura et al.
patent: 4727830 (1988-03-01), Nagahiro et al.
patent: 4727831 (1988-03-01), Nagahiro et al.

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