Device for controlling the idling operation of an internal combustion engine

Patent · Tue Aug 16 00:00:00 EDT 1988

OSTI ID:6888563

Sasaki, T

This patent describes a device for controlling idling operation of an internal combustion engine comprising: an engine RPM sensor which senses rotational speed in RPMs of an engine and generates an output signal representative thereof; a water temperature sensor which senses temperature of cooling water for the engine and generates an output signal representative thereof; a throttle valve in an intake passage of the engine which controls flow rate of intake air sucked into the engine; an actuator means operatively connected to the throttle valve for controlling the opening degree of the throttle valve during the idling operation of the engine; an actuator position sensor which senses an operating position of the actuator means and generates an output signal representative thereof; a first control means connected to receive output signals from the engine RPM sensor, the water temperature sensor, and the actuator position sensor and calling for operation of the actuator means such that the opening degree of the throttle valve is adjusted to maintain the RPMs of the engine during idling at a predetermined value corresponding to the sensed temperature of the cooling water; and a second control means operable independently of the first control means to control the operation of the actuator means in accordance with the operating position of the actuator means and the temperature of the cooling water so as to limit the operating position of the actuator means and thereby limit the RPMs of the engine to the predetermined value corresponding to the sensed temperature of the cooling water notwithstanding a higher value of RPMs being called for by the first control means.

• Assignee: Mitsubishi Denki Kabushiki Kaisha
• Patent Number(s): US 4763623
• OSTI ID: 6888563
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
AIR FLOW
ANGULAR VELOCITY
CONTROL EQUIPMENT
CONTROL SYSTEMS
COOLANTS
COOLING SYSTEMS
ENERGY SYSTEMS
ENGINES
EQUIPMENT
FLOW RATE
FLOW REGULATORS
FLUID FLOW
GAS FLOW
HEAT ENGINES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
MONITORING
OPERATION
OXYGEN COMPOUNDS
TEMPERATURE MONITORING
VALVES
VELOCITY
WATER