Valve train for internal combustion engine

Details Valve train for internal combustion engine Valve train for internal combustion engine

1978-03-22

1980-01-15

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9021, 123 9024, 123 9026, 74 57, F01L 134

Patent

active

RE0301884

ABSTRACT:
A system for varying valve timing; i.e. the rotational angle of the crankshaft during which an intake or an exhaust valve of a cylinder of a reciprocating internal combustion engine is open which results in varying valve overlap, and for varying valve lift of such intake and exhaust valves. A desmodromic cam and cam follower convert rotation of a cam shaft to reciprocating rotation, or oscillation, of the cam follower. The reciprocating rotation of the cam follower is converted by the interaction of a secondary cylindrical cam, a cylindrical control ring, and a reciprocating member to linear motion of the reciprocating member which reciprocating member is operatively connected to a poppet valve. Timing and lift of the reciprocating member and valve are variable over predetermined limits as a function of engine rpm and load by rotation of the cylindrical control ring. Each valve train positively closes as well as opens its associated valve.

REFERENCES:
patent: 1177428 (1916-03-01), Melin
patent: 2664866 (1954-01-01), Fulke
patent: 3107541 (1963-10-01), Parsus
patent: 3270360 (1966-09-01), Kropp
patent: 3492880 (1970-02-01), Pearson
patent: 3696682 (1972-10-01), Matas
patent: 3703834 (1972-11-01), Beezer
patent: 3816031 (1974-06-01), Joyce

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