Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Exhaust gas recirculation control system

Patent ·
OSTI ID:6062371
A multiple spark plug ignition internal combustion engine is equipped with an EGR control system which consists of an EGR control valve disposed in an EGR passageway connecting an exhaust gas passageway and an intake passageway. The EGR control system is arranged to control EGR rate in accordance with venturi vacuum and in accordance with the exhaust gas pressure in the EGR passageway upstream of the EGR control valve. The EGR control system comprises a device for decreasing the EGR rate under a suburban area cruising condition of a motor vehicle on which the engine is mounted.
Assignee:
Nissan Motor Co., Ltd.
Patent Number(s):
US 4165722
OSTI ID:
6062371
Country of Publication:
United States
Language:
English