Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Patent
1974-05-01
1976-05-04
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
60305, 123 75E, 123 901, 123119A, F02B 7510
Patent
active
039539695
ABSTRACT:
The valve-overlapping period of a spark ignition type, four stroke internal combustion engine extends within the range of 60.degree. to 90.degree. of crank angle with the valve overlapping period being generally equally divided to each side of the piston top dead center so that the pressure differential between the exhaust gas passage of the engine and the fuel and air intake passage causes the exhaust gas to counterflow from the exhaust gas passage to the combustion chamber and into the intake passage of the engine with the suction effect of piston descent being negligible when the piston is in the vicinity of top dead center. Secondary air supplied to the exhaust gas passage of the engine when the pressure in the exhaust gas passage is lower than atmospheric pressure during the valve-overlapping period causes the secondary air and exhaust gas mixture to mix with the fresh air and fuel mixture in the intake passage to preheat the fresh air and fuel mixture and subsequent recombustion within the combustion chamber of the engine together with the fresh mixture of fuel and primary air.
REFERENCES:
patent: 3334618 (1967-08-01), Funiciello
patent: 3413965 (1968-12-01), Gavasso
patent: 3494336 (1970-02-01), Myers
patent: 3507261 (1970-04-01), Myers
patent: 3653212 (1972-04-01), Gast
patent: 3662541 (1972-05-01), Sawada
patent: 3714932 (1973-02-01), Meacham
Taylor, C. F., The Internal Combustion Engine In Theory and Practice, (Vol. 1), MIT--Wiley, N. Y., 1960, pp. 190-191.
Mizuno Yukio
Mori Haruo
Fuji Heavy Industries Ltd.
Hart Douglas
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