Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1976-01-15
1978-05-30
Hart, Douglas
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02P 514
Patent
active
040917789
ABSTRACT:
An improvement in a vacuum advancer which controls the ignition timing of a gasoline engine responding to an engine load comprises a first pipe which is connected between a port in a wall of a carburetor adjacent a throttle valve and a diaphragm chamber of a distributor, a second pipe provided between another port in the wall of a carburetor adjacent the throttle valve and the first pipe, the second pipe being provided with a heat sensitive valve and a restricted orifice that make the second pipe communicable with the first pipe after the engine has been warmed. Thus the negative pressure therein escapes through the second pipe for said port in a wall of a carburetor adjacent the throttle valve so that the advance angle for the distributor becomes lagged, and the engine is prevented from overheat to the result that suppress generation of NO.sub.x in the exhaust.
REFERENCES:
patent: 2249446 (1941-07-01), Vanderpoel
patent: 2659353 (1953-11-01), Mallory
patent: 3494338 (1970-02-01), Reise
patent: 3638626 (1972-02-01), Marshall
patent: 3707954 (1973-01-01), Nakada
patent: 3800759 (1974-04-01), Cedar
patent: 3923023 (1975-12-01), Ito
patent: 3948232 (1976-04-01), Gould
Hart Douglas
Toyota Jidosha Kogyo Kabushiki Kaisha
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