Engine system for motor vehicle

Patent · Tue Dec 23 00:00:00 EST 1980

OSTI ID:6832762

Nakajima, Y; Nakamura, K; Sugihara, K; Takami, M

An engine system of the invention comprises an internal combustion engine; a carburetor; an exhaust gas recirculation system; an exhaust gas treatment device; and a source of secondary air, in which there is provided a fluid network which interconnects the source of secondary air, the engine exhaust system at a position upstream of the exhaust gas treatment device and the exhaust gas recirculation system at a position upstream of an exhaust gas recirculation valve and there is also provided an air injection control valve fluidly disposed in the fluid network intermediate the source of secondary air and the exhaust gas recirculation system. The air injection control valve is adapted to selectively permit and prevent the admission of air to the exhaust gas recirculation system. A controller for the air injection control valve is also disclosed which comprises a detector that generates as an output signal a first signal responsive to urban driving conditions which are empirically determined to occur when the motor vehicle is driven in urban areas and a second signal responsive to rural driving conditions which are empirically determined to occur when the motor vehicle is driven in rural areas. The controller causes the air injection valve to permit the admission of air to the egr system when the detector detects the rural driving conditions.

• Assignee: Nissan Motor Co Ltd (Japan)
• Patent Number(s): US 4240253
• OSTI ID: 6832762
• Resource Relation: Patent Priority Date: Priority date 20 Dec 1976, Japan
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
CONTROL SYSTEMS
AIR
CATALYTIC CONVERTERS
EXHAUST RECIRCULATION SYSTEMS
FUEL CONSUMPTION
FUEL ECONOMY
VALVES
CONTROL EQUIPMENT
ENERGY CONSUMPTION
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
GASES
HEAT ENGINES
POLLUTION CONTROL EQUIPMENT
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control