Exhaust gas recirculation system

Patent · Tue Nov 18 04:00:00 EST 1980

OSTI ID:6538398

Minoura, M; Yorioka, K

An exhaust gas recirculation system for cleaning exhaust gas from an internal combustion engine is provided in which a variable constriction is provided between an intake pipe and a pressure control valve in operative connection to a throttle valve in the carburetor and the pressure differential across said variable constriction is maintained constant to keep off any influence of the exhaust gas pressure while the ratio of the exhaust gas flow rate to the air intake into the engine is varied in correspondence to the intake pipe negative pressure. This exhaust gas recirculation system can be adapted to a fuel injection type intake system as well as other intake systems provided with an air valve for regulating air intake or having no venturi constriction such as employed in an su type carburetor.

• Assignee: Aisan Industry Co Ltd (Japan)
• Patent Number(s): US 4233946
• OSTI ID: 6538398
• Country of Publication: United States
• Language: English

Related Subjects

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