The Electro-hydraulic braking System (EHB) consists of an Electronic Control Unit (ECU) and a Hydraulic Control Unit (HCU). This project has developed a control unit for EHB which includes software for pressure build-up and brake assistant operations. The ebooster detects the driver’s brake request via a travel sensor and sends this information to the ECU. The ECU calculates the activation of the electric motor, which converts its torque via a gear unit into the requested assisting force. The sum total of the force supplied by the booster and the driver is converted into hydraulic pressure in a standard brake master cylinder. The brake assistant control of the ebooster can be divided into inner and outer loops, with the inner loop for current control and the outer loop for input rod stroke control. In the inner control loop, the main control target is the torque output characteristic of the electric motor, and the field oriented control method is used to control the electric motor in order to obtain a better motor response characteristic.

1.Input voltage range: 9 ~16V 

2.Temperature range for operation: -40 ~ 125°C 

3.Pressurization capacity the ebooster: 160 bar/s 

4.ebooster performance meets regulation requirements (Standard of Vehicle Safety Testing Direction 42-4)

This system can be applied in various types of vehicles equipped with hydraulic braking systems.

The technology can make domestic braking component manufacturers have capabilities of system integration and establish electronic control technique. As a result, they will get opportunities of getting into the electronic braking system supply chain to meet future trend of emerging market demand for electronic braking systems of electric or self-driving cars.