ROAD SLIP-PREVENTING METHOD OF VEHICLE, CHANGING ENGINE OUTPUT WHEN DIFFERENCE BETWEEN ENGINE TORQUE DETECTED BY USING CLUTCH AND THEORETICAL ENGINE TORQUE EXISTS

摘要

PURPOSE: A road slip-preventing method of a vehicle is provided to intercept a slip production condition between vehicle wheels and the road surface by utilizing the difference between engine torque produced by a clutch and theoretical engine torque. CONSTITUTION: In a first step of a road slip-preventing method of a vehicle, an ECU(Electronic Control Unit) decides theoretical engine torque required by an engine according to the opening degree of a throttle valve and a first speed or second speed position of a gear shift lever while recognizing the road surface is actually in a snowy road state according to an on-signal of a winter mode switch and recognizing the vehicle is actually not in a travel state according to an on-signal of a clutch and recognizing an actual torque measurement value of the engine via the clutch. In a second step, the ECU compares the actual torque measurement value of the engine with a theoretical torque calculation value of the engine and decides a slip state between the road surface and vehicle wheels. In a third step, the ECU controls engine output to make the actual torque measurement value and the theoretical torque calculation value identical by delaying the fuel ignition time while reducing the opening degree of the throttle valve to reduce suction amount supplied to the engine and reducing the fuel injection amount to reduce the fuel amount supplied if the actual torque measurement value and the theoretical torque calculation value are not identical.