Unloading gear capable of realizing engine braking and engine start/stop

Abstract

The invention relates to an unloading gear capable of realizing engine braking and engine start / stop, which is composed of a servo valve mechanism and an oil way control mechanism. The invention is characterized in that the servo valve mechanism is composed of a locking nut, a snap spring seat, an adjusting bolt, a valve body, a snap spring and a spring; the adjusting bolt is fixed on a support frame; the bottom of the adjusting bolt contacts the bottom of the valve body; the spring is positioned in the valve body; the snap spring seat is sheathed on the spring and fixed by the snap spring; the adjusting bolt is fixed by the locking nut; the oil way control mechanism is arranged on an oil way; a solenoid valve and a control valve are fixed on the support frame of the oil way control mechanism; and the control valve is provided with a control valve snap spring and a control valve return spring. The servo valve structure is used for reducing the cylinder pressure and moment of resistance in the starting process, thereby prolonging the service life of a starter, minimizing the energy consumption of an engine in the starting process and enhancing the economical efficiency of the complete machine; and the invention has the advantages of simple structure and control system, and high response speed.

Description

[0001] technical field [0002] The invention relates to a device capable of realizing engine braking and engine start-stop unloading, which is suitable for engine start-stop control with a large-torque starter motor. Background technique [0003] The total mass of modern vehicles is getting bigger and bigger, and the speed is getting higher and higher. Only relying on the main braking system of the vehicle itself can no longer meet the braking requirements of the vehicle under high-speed and heavy-load conditions. In order to ensure the safety performance of the vehicle, an auxiliary braking device must be added. Engine braking is to use the mechanical loss, pumping loss and compression work of the engine to generate the braking function through the turning of the car to the engine, thereby increasing the braking power of the car. [0004] The pollution of exhaust gas is the biggest when the car is idling, the fuel is not fully burned, energy is wasted, and the economy and...

AI Technical Summary

Problems solved by technology

The existing engine uses a traditional starter motor during the starting process. When the idle speed control device detects that the vehicle needs power, such as when the air conditioner is turned on, the driver steps on the accelerator pedal or shifts gears, the system will automatically start the engine, and the starter will work. It takes a long time to start the engine to the starting speed. When the engine is stopped / started frequently, the start is unstable.

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