Idle revolution control device for internal combustion engine

Patent · Tue Feb 16 04:00:00 EST 1988

OSTI ID:5107352

Kadota, Y

An idle revolution control device for an internal combustion engine is described comprising a water temperature sensor for detecting temperature of an engine coolant to provide an electric signal indicative of the temperature, a filter means connected to an output of the water temperature sensor, the filter means having a filter function for passing the output signal of the water temperature sensor a predetermined time after the engine starts, with time constants providing a high response speed for a temperature variation toward a high temperature side and a low response speed for a temperature variation toward a low temperature side, and a control means responsive to an output signal of the filter means for controlling an idling engine revolution to a desired revolution number for a detected water temperature.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4724808
• OSTI ID: 5107352
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL SYSTEMS
COOLING
COOLING SYSTEMS
ELECTRONIC CIRCUITS
ENERGY SYSTEMS
ENGINES
FILTERS
FUNCTIONS
HEAT ENGINES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METERS
OPERATION
OXYGEN COMPOUNDS
PULSE CIRCUITS
RESPONSE FUNCTIONS
SIGNAL CONDITIONERS
TEMPERATURE DEPENDENCE
TEMPERATURE MEASUREMENT
VELOCITY
WATER