Apparatus for controlling an idle speed of an internal combustion engine

Patent · Tue Nov 24 00:00:00 EST 1987

OSTI ID:5685426

Takao, M

An apparatus for controlling an idle speed of an internal combustion engine is described comprising: an oxygen sensor outputting a signal corresponding to a concentration of residual oxygen in the exhaust gas; means for varying an air-fuel ratio of a mixture to be supplied to the engine; means for feedback controlling the varying means to make the air-fuel ratio closer to a desired air-fuel ratio in response to the signal from the oxygen sensor; means for sensing a condition of the engine and outputting a signal corresponding thereto; means for deciding whether or not the feedback control means is to be executed in response to the signal from the sensing means; means for detecting an idle condition of the engine; means for adjusting a flow rate of the mixture; means for driving the adjusting means according to a decision of the deciding means when the detecting means detects the idle condition of the engine.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4708109
• OSTI ID: 5685426
• Resource Relation: Patent File Date: Filed date 8 Jul 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST GASES
MONITORING
FUEL INJECTION SYSTEMS
CONTROL SYSTEMS
DETECTION
FEEDBACK
FUEL-AIR RATIO
INTERNAL COMBUSTION ENGINES
MONITORS
OPERATION
OXYGEN
VELOCITY
ELEMENTS
ENGINES
FLUIDS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
MEASURING INSTRUMENTS
NONMETALS
WASTES
330100* - Internal Combustion Engines