Control apparatus of an intake air amount in an internal combustion engine

Patent · Tue Apr 08 00:00:00 EST 1986

OSTI ID:5856753

Takao, M; Kimura, T

A control apparatus is described of an intake air amount in an internal combustion engine comprising: a bypass air passageway which is arranged in parallel to an intake pipe to lead the intake air into the internal combustion engine, the bypass air passageway being formed to bypass a throttle valve portion of the intake pipe; an air control valve having an actuator to control the amount of air flowing through the air passageway and an exciting coil to drive and control the actuator in accordance with an amount of an exciting current; drive means for generating a pulse-like drive current which is controlled due to its duty ratio and supplying the drive current to the exciting coil of the air control valve; temperature detecting means for detecting temperature information corresponding to a temperature of the exciting coil of the air control valve; calculation storage means for calculating and storing a correction value of an amount of feedback control to allow the present rotating speed of the internal combustion engine in its idle state to approach an idle objective rotating speed in the states whereby a feedback control condition was set and whereby a value of the temperature information detected by the temperature detecting means lies within a specified temperature range, the stored correction value being used for calculation of a control amount upon open loop control; and control means for setting the duty ratio of the pulse-like drive current which is generated by the drive means in accordance with the control amount for the feedback control and open loop control, thereby controlling the amount of the air which flows through the bypass air passageway.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4580536
• OSTI ID: 5856753
• Resource Relation: Patent File Date: Filed date 4 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
AIR FLOW
COMPUTERIZED CONTROL SYSTEMS
VALVES
ACTUATORS
ELECTRIC CURRENTS
FEEDBACK
INTAKE STRUCTURES
MEMORY DEVICES
PULSES
ROTATION
TEMPERATURE MEASUREMENT
VELOCITY
CONTROL EQUIPMENT
CONTROL SYSTEMS
CURRENTS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
HEAT ENGINES
MECHANICAL STRUCTURES
MOTION
330100* - Internal Combustion Engines