Reset slide valve type rocker arm mechanism for engine braking and braking method thereof

Abstract

The invention discloses a reset slide valve type rocker arm mechanism for engine braking and a braking method thereof. The reset slide valve type rocker arm mechanism for engine braking comprises a control mechanism, an oil filling mechanism, a rocker arm body and a driven mechanism, wherein the rocker arm body is provided with the control mechanism, the oil filling mechanism and the driven mechanism. According to the braking method, the switching of the working modes of an engine is controlled by controlling on-off of an external electromagnetic valve; when the electromagnetic valve is switched on, the engine enters the braking mode, a control valve core in the control mechanism is pushed by high-pressure oil to move downwards, and then a slide valve core is further made to move downwardsunder the action of spring force to isolate an oil supply channel from a pressure oil channel; and the driven mechanism forms a closed space and is pushed to move by oil in the oil channels in the closed space under the action of a cam, and then an exhaust valve directly connected with the driven mechanism is opened to release compressed gas, so that effective engine braking is generated, and thespeed of a vehicle is slowed down. The reset slide valve type rocker arm mechanism for engine braking is high in integration level, simple to control, and reliable and effective.

Description

technical field [0001] The invention relates to the field of engine braking, in particular to a reset slide valve rocker mechanism for engine braking and a braking method thereof. Background technique [0002] With the improvement of road conditions and the development of automobile technology, the engine power of modern cars is getting higher and higher, while the friction inside the vehicle and the air resistance on the body are getting smaller and smaller, which means that the deceleration ability of the vehicle itself is reduced. On the other hand, domestic heavy-duty trucks are often overloaded. When going down a long slope, frequent use of the brakes will often cause the brakes to overheat and wear out or even fail. Therefore, only relying on the vehicle's own service braking, that is, the main braking system, can no longer meet the braking requirements of the vehicle under high-speed and heavy loads. In order to ensure the braking safety performance of the vehicle, an...

AI Technical Summary

Problems solved by technology

[0005] Integrating the engine brake device inside the conventional rocker arm can make the rocker arm compact in structure and reduce its weight. An engine brake device published by Chery Automobile Co., Ltd. with the application number 200810024409.2 is easy to control, but requires additional Cam switching, relatively expensive to manufacture and assemble; and very short opening time and height of the brake valve during engine braking, more limited time available for resetting

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