Method of controlling EGR for internal combustion engines

Patent · Tue Oct 25 00:00:00 EDT 1983

OSTI ID:5413602

Ishida, T

An internal combustion engine has a primary intake passage including a primary throttle valve for supplying engine cylingers with an air-fuel mixture under a full range of loads, a secondary intake passage including a secondary throttle valve for supplying the engine cylinders with an air-fuel mixture under high loads, and an exhaust-gas recirculation passage including an exhaust-gas recirculation valve for introducing an exhaust gas into the primary intake passage. Vacuums at the primary and secondary throttle valves are utilized to control the exhaust-gas recirculation valve. A distributor for producing ignition sparks is also controlled by the vacuums at the primary and secondary throttle valves for ignition timing. The engine also includes a first mechanism for retarding ignition sparks and a second mechanism for promoting engine idling. When the exhaust-gas recirculation valve is controlled, the second mechanism is released, immediately thereafter air is introduced from the secondary intake passage into the primary intake passage for air-fuel ratio control therein, and the first mechanism is released. When the secondary intake passage comes into operation, fuel vapor is introduced from a canister into the secondary intake passage.

• Assignee: Suzuki Jidosha Kogyo Kabushiki Kaisha (Japan)
• Patent Number(s): US 4411241
• OSTI ID: 5413602
• Resource Relation: Patent Priority Date: Priority date 15 Jun 1981, Japan; Other Information: PAT-APPL-361055
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST RECIRCULATION SYSTEMS
CONTROL
INTERNAL COMBUSTION ENGINES
EXHAUST GASES
VALVES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
POLLUTION CONTROL EQUIPMENT
WASTES
330700* - Advanced Propulsion Systems- Emission Control
330100 - Internal Combustion Engines