Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-06-29
1979-01-09
Cox, Ronald B.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123127, F02P 504
Patent
active
041333241
ABSTRACT:
Spark timing control apparatus for an internal combustion engine having a throttle controlled intake passage for an air-fuel mixture. A vehicle is powered by the engine. A vacuum line from the intake passage downstream from the throttle valve is connected to a three-way valve which, in turn, has one conduit connected to a spark advance chamber and another conduit connected to a spark retard chamber. Another valve closes the vacuum line when the engine temperature is low. An electrical switch sensitive to velocity of the vehicle actuates the three-way valve electromagnetically to connect the vacuum line to either of said chambers for actuating a movable member which controls the ignition timing of the engine. The conduit leading to the spark retard chamber also leads to a vacuum chamber in an additional fuel supply system having a valve, so that when the spark is retarded the additional fuel supply is cut off.
REFERENCES:
patent: 3685502 (1972-08-01), Oberdoreck
patent: 3687120 (1972-08-01), Lenz
patent: 3923023 (1975-12-01), Ito
patent: 4027633 (1977-06-01), Otsubo
patent: 4077373 (1978-03-01), Nakano
Nakamura Akihisa
Yagi Toru
Cox Ronald B.
Honda Giken Kogyo Kabushiki Kaisha
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