Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1978-10-26
1980-04-22
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123198F, F02M 2506, F02M 1304, F02D 900
Patent
active
041989406
ABSTRACT:
Disclosed is a split operation type internal combustion engine having a plurality of cylinders which are divided into a first cylinder group and a second cylinder group. The cylinders of the first cylinder group are connected to a first common intake manifold equipped with a first carburetor, and the cylinders of the second cylinder group are connected to a second common intake manifold equipped with a second carburetor. The second intake manifold is connected to the exhaust manifold via a bypass passage, and an exhaust valve is arranged in the bypass passage. A first gear actuated by the accelerator pedal is operatively connected to the first throttle valve of the first carburetor and intermittently engaged with a second gear connected to the second throttle valve of the second carburetor. The firing operation is always carried out in the first cylinder group. When the level of the vacuum produced in the first intake manifold is greater than a predetermined level, the second throttle valve remains closed, and the exhaust valve remains fully opened. At this time the exhaust gas is fed into the second cylinder group. When the level of the vacuum produced in the first intake manifold is reduced below the predetermined level, the first gear comes into engagement with the second gear for opening the second throttle valve and, at the same time, the exhaust valve is closed so that the firing operation is started in the second cylinder group.
REFERENCES:
patent: 3776207 (1973-12-01), Simko
patent: 3779013 (1973-12-01), Faber et al.
patent: 4019479 (1977-04-01), Garabedian
patent: 4024708 (1977-05-01), Takemoto
patent: 4041910 (1977-08-01), Houseman
patent: 4068637 (1978-01-01), Takamiya
patent: 4106471 (1978-08-01), Narajima et al.
patent: 4131095 (1978-12-01), Ouchi
patent: 4143635 (1979-03-01), Iizuka et al.
Burns Wendell E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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