Exhaust gas recirculation system for an internal combustion engine

Patent · Tue Dec 04 04:00:00 EST 1979

OSTI ID:5490531

Nakamura, N; Toyama, N; Baika, T

An exhaust gas recirculation system is described for an internal combustion engine of the back pressure control type wherein a back pressure chamber formed in a recirculation passage for recirculating exhaust gases is controlled to be substantially at atmospheric pressure by co-operation of a vacuum-operated diaphragm type exhaust gas recirculation control valve and a vacuum control valve which modifies the vacuum supplied to the exhaust gas recirculation control valve, wherein the system further includes a vacuum switching valve which selectively supplies intake manifold vacuum to a second diaphragm chamber of the exhaust gas recirculation control valve so as to close the control valve temporarily when the engine is decelerated.

• Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
• Patent Number(s): US 4176635
• OSTI ID: 5490531
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
INTERNAL COMBUSTION ENGINES
POLLUTION CONTROL EQUIPMENT
PRESSURE CONTROL
VALVES