Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1979-04-23
1980-04-22
Lazarus, Ronald H.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
1376275, F02P 502
Patent
active
041989376
ABSTRACT:
A pneumatic control apparatus is disclosed for an engine exhaust emission control device which includes a passage 101 for applying a negative intake passage pressure to a chamber of a differential pressure responsive unit 10 an atmospheric venting vacuum control valve 30 is provided for selectively venting the passage 101. The negative pressure chamber 37 of the valve 30 is controlled by an orifice unit 40 which supplies atmospheric pressure and/or negative pressures from spaced positions in the intake passage proximate the throttle valve 2 via flow restrictors 43, 44, whereby suitable response delays are provided. A further restrictor and check valve connected in parallel may also be employed to alter the response time. The proper selection of the restrictor flow resistances and the biasing spring strengths in the various control valves enables a wide range of operational control.
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Lazarus Ronald H.
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Nell R. A.
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