Engine exhaust gas recirculation control system

Patent · Tue Feb 05 04:00:00 EST 1980

OSTI ID:5684086

Aoyama, S

A restriction is formed in a branch passage of the exhaust gas passageway of an engine having a plurality of combustion chambers , which passage communicates at its upstream end with only a part of the combustion chambers of the engine, to divide the branch passage into upstream and downstream sections, and the egr passageway connects the upstream section and the induction passageway of the engine, and the egr rate is controlled by controlling a vacuum for operating the egr control valve in accordance with the pressure differential between the upstream and downstream sections and/or a venturi vacuum to control the degree of opening of the egr control valve and therefore the pressure differential between the sections and therefore the flow rate of exhaust gases passing through the restriction.

• Assignee: Nissan Motor Co Ltd (Japan)
• Patent Number(s): US 4186698
• OSTI ID: 5684086
• 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
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
PRESSURE CONTROL
PRESSURE GRADIENTS
VACUUM SYSTEMS
VALVES
WASTES