Idling speed control system for internal combustion engines

Patent · Tue Jun 28 00:00:00 EDT 1988

OSTI ID:6448225

Hasebe, H; Asakura, M; Sakaino, M; Miyashita, Y

This patent describes an idling speed control system for controlling idling rotational speed of an internal combustion engine having an intake passage and a throttle valve arranged therein, comprising: vacuum-operated actuator means having a vacuum chamber, and a diaphragm defining the vacuum chamber and operatively connected to the throttle valve for controlling opening and closing thereof in response to pressure in the vacuum chamber; change-over control valve means operatively connected to the vacuum-operated actuator means for supplying the vacuum chamber selectively, with a first control pressure for opening the throttle valve and a second control pressure for closing the throttle valve; and an electronic control means operatively connected to the engine and the change-over control valve means, the electronic control means being adapted to generate an on-off control pulse signal having a repetition period corresponding to rotational speed of the engine, and to supply the change-over control valve means with the on-off control pulse signal, in response to which the change-over control valve means supplies the vacuum chamber, selectively, with the first control pressure and the second control pressure.

• Assignee: Honda Giken Kogyo K.K., Tokyo
• Patent Number(s): US 4753202
• OSTI ID: 6448225
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
ANGULAR VELOCITY
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
PRESSURE CONTROL
SPEED REGULATORS
VACUUM SYSTEMS
VALVES
VELOCITY