Vehicle braking control method and device

Abstract

The invention provides a vehicle braking control method and device, and relates to the field of vehicle braking. The vehicle braking control method and device aim at solving the technical problem of how to eliminate vehicle towering during vehicle braking. The method comprises the following steps of collecting information, judging whether a vehicle is in a braking working condition or not, judging whether a towering vehicle eliminating function can be activated or not and adjusting the working radius of a cone pulley, and the device structurally comprises a control unit, a collecting module and a gearbox. According to the vehicle braking control method and device, the turbine rotating speed of a hydraulic torque converter is not higher than the engine rotating speed all the time by adjusting the working radius of a bevel wheel of the gearbox, crossing does not occur when the vehicle is braked, the situation that the vehicle deceleration absolute value is reduced due to the change of a vehicle driving state is avoided, the vehicle is prevented from generating driving force, and the situation that the vehicle is towering when the vehicle is braked is eliminated.

Description

technical field [0001] The invention relates to the field of vehicle braking, in particular to a vehicle braking control method and device. Background technique [0002] At present, many vehicles are equipped with continuously variable transmissions (CVT). The connection methods between the CVT and the engine mainly include hydraulic torque converters and multi-disc clutches. Multi-disc clutches do not have the natural and smooth flexible transmission effect of hydraulic torque converters. It has high requirements for starting, so a hydraulic torque converter is usually used. [0003] The power transmission path of the vehicle includes the engine, torque converter, gearbox, drive shaft and tires in turn. The gearbox is connected to the tire through the drive shaft. The torque converter is rigidly connected to the input shaft of the gearbox. The speed of the cone wheel is the speed of the torque converter. The speed ratio of the gearbox is constantly changing during driving,...

AI Technical Summary

Problems solved by technology

[0005] When the vehicle is under braking and the torque converter is not turned on, the engine speed is always consistent with the speed of the turbine of the torque converter. When the vehicle is under braking and the torque converter is turned on, the speed of the turbine of the torque converter is high Depending on the engine speed, the vehicle is in the above-mentioned second driving state. As the vehicle speed decreases, the turbine speed of the torque converter, which is proportional to the change in vehicle speed, will gradually decrease, while the engine speed remains basically unchanged. Therefore, the torque converter Turbine speed forms a crossover to engine speed, that is, the engine speed exceeds the turbine speed. After crossing, the vehicle is in the first state, the driving state of the vehicle changes, and the vehicle generates driving force, and the absolute value of the vehicle deceleration decreases, thus bringing a feeling of towering That is, the vehicle shakes, reducing the driver's driving experience

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