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EGR control system for diesel engine

Patent ·
OSTI ID:6423142
; ; ;
In an EGR control system for a diesel engine, the EGR amount is controlled by controlling the pressure in a diaphragm chamber of an EGR valve using the output signal of a computer, responsive to signals from a plurality of engine running condition sensors, for calculating the EGR amount wich corrections according to the engine running conditions and the excess air rate. In some cases, the EGR is carried out only when the rotational speed of the engine is higher than a predetermined rotational speed. Also, some cases, the EGR is carried out when an occurence of idling is detected, even if the rotational speed of the engine is lower than the predetermined rotational speed.
Assignee:
Nippon Soken Inc. (Japan)
Patent Number(s):
US 4450825
OSTI ID:
6423142
Country of Publication:
United States
Language:
English

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Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330700 -- Advanced Propulsion Systems-- Emission Control
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
DIESEL ENGINES
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FUEL-AIR RATIO
HEAT ENGINES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
LUBRICANTS
MOTION
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PRESSURE CONTROL
ROTATION
SIGNALS
VALVES
VELOCITY
WATER