Method of controlling intake air quantity for internal combustion engines at idle

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6659622

Yasuoka, A; Kiuchi, T

This patent describes a method of controlling the quantity of intake air being supplied to an internal combustion engine during idling thereof. The engine has an intake passage; a throttle valve arranged in the intake passage; a first auxiliary air passage bypassing the throttle valve; a first control valve arranged in the first auxiliary air passage for controlling the quantity of supplementary air to be supplied to the engine through the first auxiliary air passage on the basis of a basic value of a control amount corresponding to the difference between actual engine speed and desired idling speed; a second auxiliary air passage bypassing the throttle valve; and a second control valve arranged in the second auxiliary air passage for controlling the quantity of supplementary air to be supplied to the engine through the second auxiliary air passage in response to a temperature of the engine. The method described here comprises: (a) detecting atmospheric pressure encompassing the engine; (b) calculating a first correction value based upon the atmospheric pressure thus detected; (c) detecting the temperature of the engine; (d) calculating a second correction value based upon the detected engine temperature and atmospheric pressure; (e) correcting the basic value of the control amount by means of the first and second correction values thus calculated; and (f) driving the first control valve according to the basic value of the control amount thus corrected.

• Assignee: Honda Giken Kogyo K.K., Tokyo
• Patent Number(s): US 4649877
• OSTI ID: 6659622
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
ATMOSPHERIC PRESSURE
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
CORRECTIONS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
SPEED REGULATORS
TEMPERATURE EFFECTS
VALVES
VELOCITY