Exhaust gas recirculation system for internal combustion engine

Patent · Tue Dec 27 04:00:00 EST 1983

OSTI ID:6688096

Dozono, K; Hasegawa, Y

In an exhaust gas recirculation system for an internal combustion engine having an intake manifold in which a throttle valve is disposed and an exhaust gas conduit provided with a particle trap for accumulatively catching particles entrained by exhaust gas discharged from the engine, a control valve apparatus which is disposed in a recirculation passage and connected to the intake manifold downstream of the throttle valve and to the exhaust gas conduit upstream of the particle trap. The control valve apparatus comprises a first control means which is adapted for controlling the exhaust gas recirculation on the basis of the vacuum pressure prevailing in the intake manifold downstream of the throttle valve, and a second control means which is adapted for cooperating with the first control means to maintain optimum exhaust gas recirculation despite an increase in the pressure of the exhaust gas caused by clogging of the particle trap.

• Assignee: Nissan Motor Co., Ltd. (Japan)
• Patent Number(s): US 4422431
• OSTI ID: 6688096
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PIPES
POLLUTION CONTROL EQUIPMENT
TRAPS
VALVES
WASTES