Engine exhaust gas recirculation system

Patent · Tue Jun 23 04:00:00 EDT 1981

OSTI ID:6072519

Ishii, K; Nishimura, H; Osawa, K

An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air control valve therein draws atmospheric air into the intake passage downstream from the throttle valve. Vacuum responsive actuators are provided for each of the control valves and they are operated by vacuum pressure controlled by a regulating valve, which regulating valve is responsive to differential pressure between vacuum intensity in the intake passage upstream from said throttle valve and modified atmospheric pressure. The modified atmospheric pressure is obtained downstream of a fixed or variable restriction in the air conduit.

• Assignee: Honda Giken Kogyo K K (Japan)
• Patent Number(s): US 4274384
• OSTI ID: 6072519
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
ACTUATORS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
POLLUTION CONTROL EQUIPMENT
PRESSURE REGULATORS
VACUUM SYSTEMS
VALVES