Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1984-12-24
1986-12-09
Miller, Carl Stuart
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123198F, 123432, 123 9039, F02D 1306, F01L 134
Patent
active
046273913
ABSTRACT:
An engine valve train system for selectively effecting operation of a pair of side by side valves of a cylinder and to effect deactivation of one of the valves in the pair during predetermined modes of engine operation includes first and second rocker arms pivotably supported on a hollow rocker shaft which in turn is suitably supported for pivotable movement between an operative position and an idle or inoperative position and which is connected to a source of pressurized hydraulic fluid. The first rocker arm is adapted to be driven by an actuator to effect opening and closing movement of one of the valves. The second rocker arm has a hydraulic cylinder and piston means which, when the rocker shaft is in the operative position, is supplied with hydraulic fluid whereby to extend the piston to operatively connect the second rocker arm with the first rocker arm so as to be also operated thereby whereby to effect opening and closing movement of the other one of the valves and when the rocker shaft is in the idle or inoperative position, hydraulic fluid can drain from the hydraulic cylinder and piston means whereby the second rocker arm becomes inoperative to effect opening movement of the other one of the valves.
REFERENCES:
patent: 4220122 (1980-09-01), Aoyama
patent: 4256070 (1981-03-01), Mueller
patent: 4469061 (1984-09-01), Ajiki
patent: 4480617 (1984-11-01), Nakano
patent: 4492192 (1985-01-01), Bagoelin
patent: 4523550 (1985-06-01), Matsuura
patent: 4537164 (1985-08-01), Ajiki
patent: 4537165 (1985-08-01), Honda
Automotive Engineering, vol. 92, No. 2, Feb. 1984, pp. 86-89, Dallas Texas, US.
J. Yamaguchi: "Variable Valve Area Improves Breathing" p. 86, line 16-p. 87, line 18, Figures 2-3.
General Motors Corporation
Krein Arthur N.
Miller Carl Stuart
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