Exhaust gas recirculation control system
Patent
·
OSTI ID:6448344
An EGR control valve is closely disposed in an EGR passageway connecting an intake passageway and an exhaust gas passageway which leads to an internal combustion engine. The EGR control valve is operated to control recirculated exhaust gas flow by varying the exhaust gas pressure in a chamber between a restriction disposed in the EGR passageway and the EGR valve, in accordance with variations in a venturi vacuum in the intake passageway to prevent the recirculated exhaust gas flow from being affected by the exhaust gas pressure in the EGR passageway upstream of the chamber. Furthermore, the EGR control valve is arranged to be controlled so that the amount of the recirculated exhaust gas is reduced during high engine speed operation of the engine.
- Assignee:
- Nissan Motor Co., Ltd.
- Patent Number(s):
- US 4124004
- OSTI ID:
- 6448344
- Country of Publication:
- United States
- Language:
- English
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