Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-07-22
1979-04-17
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 2506
Patent
active
041495004
ABSTRACT:
Two diaphragms divide a vacuum motor which controls the flow of exhaust gases from the exhaust passage to the induction system into three chambers, the first is fed a modulated vacuum signal from the induction passage, the second either an uncontrolled signal from substantially the aforementioned part of the induction passage or a VC vacuum created immediately upstream of the position assumed by the throttle valve in a fully closed position and the third exposed to atmospheric pressure. A relief valve disposed in the conduit through which the modulated vacuum is fed opens upon the pressure therein falling to a predetermined level to further modulate the vacuum in the first chamber.
The vacuum regulating device which modulates the vacuum from the induction passage is responsive to atmospheric pressure, a signal which originates immediately downstream of a restriction in the EGR passage which may be either greater or less than atmospheric pressure depending on the design of the restriction and a venturi vacuum signal or the equivalent. To modulate the vacuum in the first chamber the relief valve can feed the vacuum which opens it to a normally atmospheric chamber of the vacuum regulating device.
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patent: 3888222 (1975-06-01), Tomita
patent: 4009700 (1977-03-01), Engels et al.
patent: 4040402 (1977-08-01), Nohira et al.
patent: 4041914 (1977-08-01), Sugihara et al.
patent: 4041917 (1977-08-01), Suzuki
patent: 4044739 (1977-08-01), Miura et al.
patent: 4056084 (1977-11-01), Baumgartner
patent: 4066056 (1978-01-01), Nohira et al.
patent: 4069797 (1978-01-01), Nohira et al.
patent: 4092960 (1978-06-01), Nohira et al.
patent: 4094287 (1978-06-01), Nohira
Adams Bruce L.
Burns Robert E.
Burns Wendell E.
Lobato Emmanuel J.
Nissan Motor Company Limited
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