Oil pressure resistance apparatus for vehicle

Abstract

The invention relates to a retarder for an automobile. An oil pressure resistance apparatus for a vehicle consists of a resistance system and an operation control system, wherein a resistance pump of the resistance system is arranged between a speed changing box and a rear axle by use of universal joints; the resistance pump is driven to rotate by virtue of a drive shaft of the vehicle; an oil outlet pipe of the resistance pump is provided with an oil control valve; the oil control valve is controlled by virtue of a command signal sent by the operation control system so as to reduce the oil discharge amount; after the pressure of the resistance pump increases, resistance is generated and the running resistance of the vehicle increases; when in operation, vehicle speed set values are input into the control system, a vehicle speed detector detects a current vehicle speed; when the vehicle speed reaches the maximal set value, the oil control valve is gradually closed, and the resistance of the resistance pump increases, so that the vehicle decelerates; when the vehicle speed is reduced to the minimum set value, the oil control value is gradually opened, and the resistance of the resistance pump decreases, so that the vehicle reaches a set speed by virtue of inertia; when the vehicle runs on a level road or on an upslope, the control system is turned off, the resistance pump is in an idling condition, and kinetic energy of the vehicle is not consumed.

Description

Technical field [0001] The invention relates to a retarder for automobiles. Background technique [0002] When a truck is going down a long slope, due to the very strong inertial force of the vehicle downhill, the brake drum of the vehicle will generate heat when it works for a long time. Engine braking must also be used to reduce the speed of the vehicle during service braking, and the resistance produced by the engine is limited. The existing electromagnetic retarders, permanent magnet retarders and other vehicle retarders have low resistance to retardation and are affected by the environment. Factors such as the influence of temperature make it not well applied in the market. When the heavy-duty vehicle is going down a long slope, the brakes are overloaded. If the temperature of the brake drum is too high, the braking efficiency will decrease, and it will be longer in emergency situations. The braking distance may cause the brakes to fail, resulting in serious traffic ac...

AI Technical Summary

Problems solved by technology

[0002] When a truck is going down a long slope, due to the very strong inertial force of the vehicle downhill, the brake drum of the vehicle will generate heat when it works for a long time. Engine braking must also be used to reduce the speed of the vehicle during service braking, and the resistance produced by the engine is limited. The existing electromagnetic retarders, permanent magnet retarders and other vehicle retarders have low resistance to retardation and are affected by the environment. Factors such as the influence of temperature make it not well applied in the market. When the heavy-duty vehicle is going down a long slope, the brakes are overloaded. If the temperature of the brake drum is too high, the braking efficiency will decrease, and it will be longer in emergency situations. Braking distance may lead to brake failure, resulting in serious traffic accidents