Arrangement for controlling the idle speed of an engine of a motor vehicle
First Claim
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1. An arrangement for controlling the idle speed of an engine of a motor vehicle, the arrangement comprising:
- an actuator for acting on said engine to influence the speed thereof;
first sensor means for detecting the actual speed of the engine and providing a first signal having an actual value indicative of said actual speed;
second sensor means for detecting the road speed of the motor vehicle;
desired-value forming means connected to said second sensor means for forming a second signal indicative of a desired value of a desired speed for said idle speed dependent upon said road speed;
comparison means for comparing said first and second signals to form a difference signal indicative of the deviation of said desired speed from said actual speed; and
,a controller receiving said difference signal for forming and supplying an output signal to said actuator to thereby cause said actual speed to approach said desired speed.
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Abstract
The invention is directed to an arrangement for controlling the engine speed and especially the idle engine speed of an engine of a motor vehicle. The pregiven idle engine speed desired value is controlled in dependence upon the road speed of the motor vehicle so that this desired value becomes greater with increasing road speed.
13 Citations
9 Claims
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1. An arrangement for controlling the idle speed of an engine of a motor vehicle, the arrangement comprising:
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an actuator for acting on said engine to influence the speed thereof; first sensor means for detecting the actual speed of the engine and providing a first signal having an actual value indicative of said actual speed; second sensor means for detecting the road speed of the motor vehicle; desired-value forming means connected to said second sensor means for forming a second signal indicative of a desired value of a desired speed for said idle speed dependent upon said road speed; comparison means for comparing said first and second signals to form a difference signal indicative of the deviation of said desired speed from said actual speed; and
,a controller receiving said difference signal for forming and supplying an output signal to said actuator to thereby cause said actual speed to approach said desired speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An arrangement for controlling the idle speed of an engine of a motor vehicle having drive wheels, the engine being connected to said drive wheels via a transmission having gears, the arrangement comprising:
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an actuator for acting on said engine to influence the speed thereof; first sensor means for detecting the actual speed of the engine and providing a first signal having an actual value indicative of said actual speed; second sensor means for detecting the road speed of the motor vehicle; desired-value forming means connected to said second sensor means for forming a second signal indicative of a desired value of a desired speed for said idle speed dependent upon said road speed; comparison means for comparing said first and second signals to form a difference signal indicative of the deviation of said desired speed from said actual speed; a controller receiving said difference signal for forming and supplying an output signal to said actuator to thereby cause said actual speed to approach said desired speed; and
,said desired-value forming means further including means for causing said desired value for said idle speed to lead to an adjustment of said engine speed when said motor vehicle is rolling with a gear of said transmission in place to provide a connection between said engine and the drive wheels of said motor vehicle whereby said road speed is adjusted to a minimum without a vibration developing in the torque transmitting connection. - View Dependent Claims (8, 9)
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Specification