Long-downgrade self-adaptive retarder for passenger vehicle and control device and method thereof

Abstract

The invention discloses a long-downgrade self-adaptive retarder for a passenger vehicle and a control device and method thereof. The method comprises the steps that 1, current driving road informationof the passenger vehicle is detected; 2, a downgrade gradient, and a self-vehicle gear and a current vehicle speed of the passenger vehicle are detected, and the safe and stable speed and the safetyspeed of each level of the passenger vehicle under the current gear are obtained; 3, a corresponding braking mode is determined, and the retarder is controlled to automatically turned on and a corresponding retarder gear is selected; 4, after the retarder is turned on, a retarder excitation current is adjusted to realize accurate braking torque compensation of the retarder; and 5, the vehicle speed of the passenger vehicle is continuously detected in the braking process, and if the vehicle speed is less than or equal to the safe and stable speed of the passenger vehicle at the current gear andthe gradient, the retarder is turned off. The long-downgrade self-adaptive retarder for the passenger vehicle and the control device and method thereof realize the accurate braking torque compensation of the retarder, complete the deceleration process with higher braking efficiency, and ensure that the passenger vehicle can safely and effectively complete the braking and deceleration downgrade.

Description

technical field [0001] The invention relates to the field of passenger vehicle driving safety, in particular to a passenger vehicle long downhill self-adaptive retarder and its control device and method. Background technique [0002] When the car is driving on a long downhill road for a long time, the potential energy of its own gravity is converted into kinetic energy, which makes the speed of the car tend to increase. At the end of the end, its main braking system also has sufficient braking performance. When driving on a slope, use the braking system to convert the potential energy and kinetic energy of the car into heat energy, especially when driving continuously downhill, the thermal load of the braking system of the car is very large, and the braking system cannot release the heat in time To the surrounding environment, the temperature of the brake hub and brake shoe is greatly increased, so that it reaches the failure temperature of the brake. Due to continuous bra...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a passenger vehicle long downhill self-adaptive retarder and its control device and method, which are used to solve the problem of overheating of the brakes and the low utilization rate of the road surface adhesion conditions of passenger vehicles on long downhill slopes. To solve the problem, through the adaptive opening of the retarder and the selection of appropriate gears, the utilization rate of the passenger car to the road surface adhesion conditions can be improved, and the passenger car can go downhill safely.

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