System for regulating the idle speed of an internal combustion engine

Patent · Tue Oct 14 04:00:00 EDT 1986

OSTI ID:5074367

Abe, K

This patent describes a system for regulating the idle speed of an internal combustion engine with an electronic fuel injection system having an air flow bypass around a throttle valve of the engine and at least one solenoid operated control valve. The solenoid operated control valve has at least one solenoid provided in the bypass to control the volume of air flow passing through the bypass. The improvement described here comprises: first means for sensing speed of the engine and for producing an engine speed signal; at least one second means for producing a reference voltage corresponding to a predetermined idle speed; integration operating means operatively for producing during idle operation of the engine a regulating signal dependent on the difference between the engine speed signal and the reference voltage. The regulating signal comprises simultaneously a first integration component, the value of the latter relatively rapidly increasing, and a second integration component, the value of the latter relatively slowly increasing; and a driver responsive to the regulating signal for energizing at least one solenoid of at least one solenoid operated control valve to actuate at least one control valve.

• Assignee: Fuji Jukogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4616614
• OSTI ID: 5074367
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
SIGNALS
SOLENOIDS
SPEED REGULATORS
VALVES
VELOCITY