| 摘要 |
PURPOSE: A car control method and a device thereof are provided to detect generation of hopping, and to control breaking pressure of TCS and engine torque by timing the hopping correctly, thereby securing ride comfort and preventing damage of an engine mount. CONSTITUTION: A car control method comprises the following steps of; judging whether hopping of a vehicle is generated or not(212); performing engine control and braking control in case the hopping is generated(214,216) where the braking control is performed according to an increase/decrease tendency of a wheel speed, and gets the vehicle out of a resonance area; increasing braking power in case the wheel speed is on the increase(220); decreasing the breaking power in case the wheel speed is on the decrease(222). An engine control reduces engine torque by 5-10%. [Reference numerals] (202) Measure a wheel speed using a sensor; (204) Determine the increasing/decreasing tendency of the wheel speed; (206) Calculate the amplitude and period of the wheel speed and the difference of the wheel speed from a vehicle speed; (208) Determine whether a reference value is satisfied; (210) Determine whether three periods are satisfied; (212) Start hopping control; (214) Engine control(Reduce 5-10% of engine torque); (216) Braking control(Apply the concept of time shift); (218) Increasing tendency of the wheel speed; (220) Increase braking power; (222) Reduce braking power; (224) Release the hopping control; (AA) Start; (BB,DD,FF,HH) No; (CC,EE,GG,II) Yes; (JJ) End |
