Engine idling speed controlling system
First Claim
1. An engine idling speed controlling system including:
- a stopper member for restricting a stop position on a closing side of a throttle valve mounted in an intake passage of an engine;
an actuator for actuating said stopper member to change said closing side stop position to thereby control the opening of the throttle valve;
a throttle position sensor for detecting an opening of the throttle valve;
an engine speed sensor for detecting the number of revolutions of the engine;
a first idling speed control means for comparing a detected signal from said engine speed sensor with a target idling speed of the engine when the throttle valve is under control by said actuator and providing to the actuator a first idling control signal obtained from the result of said comparison;
a second idling speed control means for comparing a detected signal from said throttle position sensor with a target idle opening of the throttle valve when the throttle valve is under control by said actuator and providing to the actuator a second idling control signal obtained from the result of said comparison;
an operation control means for controlling the operation of said first idling speed control means and that of said second speed control means; and
a correction value learning means for learning a correction value for said second idling control signal on the basis of a detected signal from said throttle position sensor during operation of said first idling speed control means,said correction value learning means being constructed so as to determine as said correction value both a long-time correction value based on a cumulative evaluation of detected signals from said throttle position sensor during operation of said first idling speed control means and a just-previous correction value based on the newest detected signal from said throttle position sensor during operation of said first idling speed control means, and said second idling speed control means being constructed so as to receive the long-time correction value and just-previous correction value determined by said correction value learning means and obtain said second idling control signal in order to reflect the learning results of said correction value learning means in said second idling control signal.
0 Assignments
0 Petitions
Accused Products
Abstract
An engine idling speed controlling system including, for controlling the throttle valve opening appropriately, a first idling speed control means for comparing a detected signal provided from an engine speed sensor during idle running with a target engine idling speed and providing a first idling control signal, a correction value learning means for learning a long-time correction value or a just-previous correction value on the basis of a cumulative value of the newest value of a detected signal provided from a throttle position sensor during operation of the first idling speed control means, a second idling speed control means for comparing a detected signal provided from the throttle position sensor during idle running with a target throttle opening, receiving the long-time correction value and the just-previous correction value and producing a second idling control signal, and means for controlling the idle opening of the throttle valve in accordance with one of the first and second idling control signals.
18 Citations
14 Claims
-
1. An engine idling speed controlling system including:
-
a stopper member for restricting a stop position on a closing side of a throttle valve mounted in an intake passage of an engine; an actuator for actuating said stopper member to change said closing side stop position to thereby control the opening of the throttle valve; a throttle position sensor for detecting an opening of the throttle valve; an engine speed sensor for detecting the number of revolutions of the engine; a first idling speed control means for comparing a detected signal from said engine speed sensor with a target idling speed of the engine when the throttle valve is under control by said actuator and providing to the actuator a first idling control signal obtained from the result of said comparison; a second idling speed control means for comparing a detected signal from said throttle position sensor with a target idle opening of the throttle valve when the throttle valve is under control by said actuator and providing to the actuator a second idling control signal obtained from the result of said comparison; an operation control means for controlling the operation of said first idling speed control means and that of said second speed control means; and a correction value learning means for learning a correction value for said second idling control signal on the basis of a detected signal from said throttle position sensor during operation of said first idling speed control means, said correction value learning means being constructed so as to determine as said correction value both a long-time correction value based on a cumulative evaluation of detected signals from said throttle position sensor during operation of said first idling speed control means and a just-previous correction value based on the newest detected signal from said throttle position sensor during operation of said first idling speed control means, and said second idling speed control means being constructed so as to receive the long-time correction value and just-previous correction value determined by said correction value learning means and obtain said second idling control signal in order to reflect the learning results of said correction value learning means in said second idling control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification