Exhaust gas recirculation system for an internal combustion engine

Patent · Tue May 20 04:00:00 EDT 1980

OSTI ID:5399287

Yorioka, K

An exhaust gas recirculation system for an internal combustion engine wherein a fixed restriction, a pressure chamber and a pressure control valve are arranged in the order named in an exhaust gas recirculation passage and the pressure control valve is controlled in such a way that the pressure in the pressure chamber may be maintained equal to the combined pressure which is obtained by the comparison between two amplified pressure signals a and B both of which represent the quantity such as the negative pressure in an intake pipe which in turn represents the variations in load on the engine. With these two pressure signals a and b, the pressure in the pressure chamber may be varied from the exhaust gas pressure to the pressure a few times the negative pressure created in a venturi in the intake pipe, whereby in response to the variations in load on the engine, which may be represented by the variations in the negative pressure in the intake pipe, the ratio of the flow rate of the exhaust gases to be recirculated to the quantity of the intake air may be varied more widely than in the exhaust gas recirculation system.

• Assignee: Aisan Industry Co Ltd (Japan)
• Patent Number(s): US 4203400
• OSTI ID: 5399287
• Country of Publication: United States
• Language: English

Related Subjects

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