Vehicle traction control system for preventing vehicle turnover on curves and turns
First Claim
1. A traction control system for a motor vehicle having engine with a throttle valve actuated by an actuator means and wheels driven by the engine, accelerator pedal depression degree detector means for detecting degree of acceleration pedal depression and for producing a depression degree signal, throttle control means responsive to the depression degree signal for computing a desired throttle valve opening degree corresponding to the accelerator pedal depression degree and for producing a desired opening degree signal to the actuator means, the traction control system comprising:
- wheel stroke detecting means for detecting wheel stroke depending on a vertical movement of each of the wheels and for producing a wheel stroke signal;
wheel lift-off detector means responsive to said wheel stroke signal for determining a wheel lift-off condition when said wheel stroke of either of the wheels exceeds a predetermined value and for producing a wheel life-off signal; and
correction means responsive to said wheel lift-off signal and to the desired opening degree signal for decreasing the desired throttle valve opening degree to reduce an output of the engine.
1 Assignment
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Accused Products
Abstract
A traction control system comprising a slip control circuit connected between a slip detector circuit and a hydraulic brake control mechanism. Normally, the slip control circuit acts to cause the brake control mechanism to controllably actuate brakes on vehicle wheels so as to maintain the slip rates of the wheels less than a predetermined limit. The slip control circuit is disabled, however, by a wheel liftoff detector circuit as the latter detects, when the vehicle is rounding a curve, the lifting of the inside wheels off the road surface. At the same time the wheel liftoff detector circuit causes a decrease in engine power through reduction of throttle opening, thereby minimizing the danger of vehicle turnover.
146 Citations
4 Claims
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1. A traction control system for a motor vehicle having engine with a throttle valve actuated by an actuator means and wheels driven by the engine, accelerator pedal depression degree detector means for detecting degree of acceleration pedal depression and for producing a depression degree signal, throttle control means responsive to the depression degree signal for computing a desired throttle valve opening degree corresponding to the accelerator pedal depression degree and for producing a desired opening degree signal to the actuator means, the traction control system comprising:
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wheel stroke detecting means for detecting wheel stroke depending on a vertical movement of each of the wheels and for producing a wheel stroke signal; wheel lift-off detector means responsive to said wheel stroke signal for determining a wheel lift-off condition when said wheel stroke of either of the wheels exceeds a predetermined value and for producing a wheel life-off signal; and correction means responsive to said wheel lift-off signal and to the desired opening degree signal for decreasing the desired throttle valve opening degree to reduce an output of the engine. - View Dependent Claims (2, 3, 4)
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Specification