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

Exhaust gas recirculation system

Patent ·
OSTI ID:6188486
Apparatus for controlling exhaust gas recirculation in an internal combustion engine employs a first control valve in an exhaust gas recirculation passageway, a second control valve in an air conduit connecting the intake passage to atmosphere through selective restriction means, and a regulating valve responsive to differential vacuum intensities for actuating the control valves. The restriction means comprise a plurality of individual restrictions one or more of which are selectively put into operation depending upon engine operating parameters such as coolant temperature and driving speed.
Assignee:
Honda Giken Kogyo K K (Japan)
Patent Number(s):
US 4335699
OSTI ID:
6188486
Country of Publication:
United States
Language:
English