Engine idle control system for vehicle
First Claim
1. An engine idle control system for a vehicle which causes the engine speed to converge on a target idling speed by a feedback control when the engine idles characterized in that said control system is provided with an engine speed sensor and a means for detecting whether the engine is revolving by itself or is being driven by the vehicle, and controls the engine speed by a proportional feedback control on the basis of the difference between an actual engine speed and the target idling speed when the engine is being driven by the vehicle while controlling the engine speed by a control at least a part of which is an integral feedback control when the engine is revolving by itself.
1 Assignment
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Accused Products
Abstract
An engine idle control system for a vehicle causes the engine speed to converge on a target idling speed by feedback control when the engine idles. Whether the engine is revolving by itself or is being driven by the vehicle is detected, and the engine speed is controlled by a proportional feedback control on the basis of the difference between the actual engine speed and the target idling speed when the engine is being driven by the vehicle, and is controlled by a control at least a part of which is an integral feedback control when the engine is revolving by itself.
6 Citations
4 Claims
- 1. An engine idle control system for a vehicle which causes the engine speed to converge on a target idling speed by a feedback control when the engine idles characterized in that said control system is provided with an engine speed sensor and a means for detecting whether the engine is revolving by itself or is being driven by the vehicle, and controls the engine speed by a proportional feedback control on the basis of the difference between an actual engine speed and the target idling speed when the engine is being driven by the vehicle while controlling the engine speed by a control at least a part of which is an integral feedback control when the engine is revolving by itself.
Specification