What is the principle of automobile electronic pump?

The invention overcomes the shortcomings of the traditional hydraulic power steering system. The hydraulic pump it uses is no longer directly driven by the engine belt, but an electric pump, and all its working conditions are the most ideal ones calculated by the electronic control unit according to the signals such as vehicle speed and steering angle. To put it simply, the electronic control unit drives the electronic hydraulic pump to run at high speed, so as to output more power when steering at low speed, which makes the driver steering labor-saving; When the car runs at high speed, the hydraulic control unit drives the electronic hydraulic pump to run at low speed, which will not affect the need of high-speed steering and save some engine power. Is to use a more common power steering system.