Exhaust gas recirculation system for internal combustion engine

Patent · Tue Sep 08 04:00:00 EDT 1981

OSTI ID:5741405

Ikuta, Y; Matsuo, M

An exhaust gas recirculation system for an internal combustion engine has an exhaust gas recirculation passage, a constant pressure chamber disposed in the exhaust gas recirculation passage, a pressure regulating valve operative in response to the exhaust gas pressure in the constant pressure chamber, a first flow-rate control valve adapted to be actuated by the vacuum regulated by the pressure regulating valve so as to open and close the exhaust gas recirculating passage and a second flowrate control valve disposed at the upstream side of the constant pressure chamber and adapted to change the cross-sectional area of the exhaust gas recirculating passage in response to the vacuum generated by the internal combustion engine. The exhaust gas recirculation system further has an atmospheric-pressure introduction passage attached to the constant pressure chamber or disposed in a pressure transmitting passage through which the constant pressure chamber is communicated with the pressure regulating valve. The atmospheric-pressure introduction valve is adapted to open in response to an increase of the level of the vacuum in the constant pressure chamber or in the pressure transmitting passage, so as to selectively introduce the atmospheric pressure.

• Assignee: Toyota Jidosha Kogyo K K (Japan)
• Patent Number(s): US 4287866
• OSTI ID: 5741405
• Country of Publication: United States
• Language: English

Related Subjects

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