In the early stage, the vehicle mass is relatively small, the speed is relatively low, the mechanical chassis can meet the driver’s control needs. The driver directly controls the six components of the tire through the operation of the steering wheel and pedal, thus indirectly changing the freedom of three-way translation and three-way rotation of the vehicle. With the development of science and technology and the development of the automobile industry, especially the development of military vehicles and military technology, the chassis system has also made new breakthroughs, such as the introduction of hydraulic steering and hydraulic braking is a major technical innovation of the chassis in the mechanical period. At the same time, as vehicles get heavier, boosters are becoming more widely used in chassis control to provide steering or braking assistance to the driver. But essentially, vehicle motion control in this period was entirely dependent on driver input.
In the electromechanical hybrid period, the combination of traditional mechanical hydraulic design and single-chip control can further reduce the driving load of the driver, but also through software control to assist the driver to better vehicle control, vehicle fuel economy, safety and comfort are greatly improved.
Take electronic brake booster system eBooster as an example. eBooster uses sensors to sense the force and speed of the driver pressing the brake pedal and processes the signals to the electronic control unit (ECU), which controls the torque corresponding to the power motor and pushes the brake pump to work under the electromechanical amplifying mechanism, thus realizing electronic brake. Faster response time and precise pressure control.