Study: Electro-Hydraulic Brake Systems for Vehicle

Abstract

The hydraulic brake system, a long-standing and reliable vehicle component, has evolved significantly by introducing advanced functionalities such as the Electronic Stability Program (ESP), Anti-lock Braking System (ABS), and more. However, these enhancements have increased system complexity, challenging maintenance efforts. The rise of new energy vehicles like electric and hybrid vehicles requires transitioning from traditional vacuum boosters to electric hydraulic pumps, highlighting the limitations of hydraulic systems in accurately and independently regulating braking force. Brake-by-wire (BBW) systems, including Electronic-Hydraulic Brakes (EHB), Electronic-Wedge Brakes (EWB), and Electronic-Mechanical Brakes (EMB), offer superior performance, modularity, and flexibility by utilizing electronic controls and motors. This paper explores various BBW systems' structure, components, and operational principles, emphasizing their benefits and limitations. The development of hybrid BBW actuators, which combine hydraulic and electromechanical systems, is proposed as a short-term solution to address current technological constraints. Overcoming these limitations is essential for the widespread adoption of BBW systems, promising enhanced braking performance, safety, and energy efficiency for future vehicles.