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U.S. Department of Energy
Office of Scientific and Technical Information

Exhaust gas recirculation system

Patent ·
OSTI ID:5282453
Passage means are described for communicating an EGR passage between first and second EGR control valves. A vacuum chamber of an actuator of the second EGR control valve is prevented from being clogged by solids of the engine exhaust gases by the provision of an air pump for feeding air to fill the passage means between an orifice therein and the EGR passage with air and also to make the amount of engine exhaust gases passing through the orifice nearly zero.
Assignee:
Nissan Motor Co., Ltd.
Patent Number(s):
US 4048968
OSTI ID:
5282453
Country of Publication:
United States
Language:
English