Apparatus and method of controlling vehicle wheel spin
First Claim
1. A vehicle wheel spin control apparatus comprising:
- a vehicle speed detecting unit that detects a vehicle speed;
an accelerator pedal detecting unit that detects a displacement of an accelerator pedal;
an engine torque control device; and
a control unit that is arranged to determine whether a predetermined operation and a predetermined cancellation condition are satisfied based on the vehicle speed, a speed gradient value, and the displacement of the accelerator pedal and whether wheel spin occurs;
wherein the control unit is arranged to perform an engine torque limit control with the engine torque control device when the predetermined operation condition is satisfied and wheel spin occurs;
wherein the engine torque limit control includes;
reducing an engine torque to a first torque value (TQ1);
reducing the engine torque to a second torque value (TQ2) with a first torque gradient (S1) according to a variation in the vehicle speed; and
maintaining the engine torque to the second torque value (TQ2) in a case that the vehicle speed is reduced after a predetermined time (t1) has elapsed from an inception of reducing the engine torque to the first value (TQ1).
1 Assignment
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Accused Products
Abstract
The present invention provides a vehicle wheel spin control apparatus that, when it is determined that a wheel spin occurs, reduces engine torque to prevent the wheel spin, including: detecting driving control information and information on the state of a vehicle and determining whether basic conditions required to perform engine torque limit control to prevent the wheel spin are satisfied; when the basic conditions are satisfied, calculating a speed variation and the speed gradient value, and comparing the speed gradient value with a predetermined speed gradient value to determine whether a spin occurs; when it is determined that the spin occurs, using a torque gradient map set according to the current engine torque to perform the engine torque limit control; and when the vehicle speed is reduced by the engine torque limit control and cancellation conditions are satisfied, canceling the engine torque limit control and returning to normal control.
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Citations
7 Claims
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1. A vehicle wheel spin control apparatus comprising:
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a vehicle speed detecting unit that detects a vehicle speed; an accelerator pedal detecting unit that detects a displacement of an accelerator pedal; an engine torque control device; and a control unit that is arranged to determine whether a predetermined operation and a predetermined cancellation condition are satisfied based on the vehicle speed, a speed gradient value, and the displacement of the accelerator pedal and whether wheel spin occurs; wherein the control unit is arranged to perform an engine torque limit control with the engine torque control device when the predetermined operation condition is satisfied and wheel spin occurs; wherein the engine torque limit control includes; reducing an engine torque to a first torque value (TQ1); reducing the engine torque to a second torque value (TQ2) with a first torque gradient (S1) according to a variation in the vehicle speed; and maintaining the engine torque to the second torque value (TQ2) in a case that the vehicle speed is reduced after a predetermined time (t1) has elapsed from an inception of reducing the engine torque to the first value (TQ1). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification