Variable-pressure gas release braking method and variable-pressure gas release brake for implementing same

Abstract

The invention discloses a variable-pressure gas release braking method. The variable-pressure gas release braking method includes that a first cavity, a second cavity and a third cavity are sequentially arranged on a brake shell; an electromagnetic valve is fixed into the first cavity, a slider is arranged in the second cavity, the second cavity is sealed by a plug, the plug is connected with the slider by a second spring, and a second steel ball is arranged between the slider and an oil drain passage; a piston is arranged in the third cavity; medium oil and the second spring jointly push the slider when the electromagnetic valve is powered on, the oil drain passage is sealed by the second steel ball, the medium oil pushes the piston to move downwardly, the pressure of the medium oil in a piston cavity rises when an exhaust valve of an engine is stopped from resetting by the bottom of the piston, the medium oil and a first spring jointly act to push a first steel ball to move downwardly, an oil inlet hole of the piston is sealed, the medium oil in the piston cavity is turned into high-pressure oil, and the piston is stopped from moving upwardly, so that the exhaust valve is opened in an ejected manner, and the purpose of braking the engine is achieved. The invention further discloses a variable-pressure gas release brake.

Description

Technical field [0001] The present invention relates to the technical field of machinery, and in particular to a pressure-variable bleed brake method and a pressure-variable bleed brake prepared by the method for engine braking. Background technique [0002] When the car encounters unexpected situations and needs to control the speed of the car during the driving process, the driver should continue to brake the car so that the speed of the car is stabilized at a certain safe value. However, in this case, it is difficult to accomplish such a braking task by relying solely on the service brake system, because the frequent operation of the brakes in the automatic service system will cause its temperature to rise significantly, and the braking efficiency will decline, or even completely Failure, so most of the cars are equipped with auxiliary braking devices. [0003] As an auxiliary braking device, the engine brake is widely used in large passenger cars and heavy commercial vehicles...

AI Technical Summary

Problems solved by technology

[0004] At present, the structure of the existing engine brake is relatively complicated, the cost is high, and the sealing performance is poor, the braking power is low, and the oil inlet passage and the oil discharge passage are the same pipeline, so the response speed of the brake is relatively slow, and the braking performance is relatively low. The effect is not ideal

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