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    According to the different driving mode, the pump is generally divided into mechanical pumps and electric pumps. Most of the engines now use mechanical pumps, and electric pumps have been used in some newly developed, technologically high engines, such as the BMW 6-series (E63) engine.

1Mechanical pumps

    The mechanical water pump is driven by the engine crankshaft through the driving tape, and its rotational speed is proportional to the engine speed. The working methods of mechanical pumps have both advantages and disadvantages. When the engine is working under high speed and heavy load conditions, the heat produced by the engine, the high speed of the pump makes the circulating flow of the coolant increase, so that the cooling capacity of the engine can be improved. When the engine is working under low speed and heavy load, such as traction other vehicles or open air conditioner, the engine speed is low and the speed of pump is low. , which lowers the engine's cooling capacity.

2Electric pumps

    Electric water pump has brushless electric pump and brush electric pump. The electric pump is controlled by the engine control unit through the current, which is not affected by the engine speed, and can be flexibly operated according to the actual cooling of the engine. Because the electric pump consumes very little engine power, the fuel consumption of the engine can be reduced after the electric pump is used.

    Thanks for your reading. If you have any questions, please contact me [email protected].

    https://s1.ax1x.com/2018/07/21/P8R9aQ.jpg  

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Hydraulic pump is connected with the prime mover, and the pump shaft has no additional radial load; while hydraulic motor is connected with the load, such as sprockets, pulleys, gears and so on, its main shaft will bear a higher radial load. 3. The low pressure chamber of the hydraulic pump is usually vacuum.

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