关键词: 液压 ABS/ESC；柱塞泵；轮边负压；失效机理

Abstract: As the basis of active safety and brake-by-wire technology, the localization of hydraulic anti-lock brake system (ABS)/electronic stability control (ESC) has a certain theoretical research foundation, but the original design requirements are not well understood and the failure management system is not perfect, which makes engineers will encounter various practical problems in the process from theoretical research to engineering practice. This paper studies the design requirements of the pump subsystem for the key characteristic parameters of related parts from the three aspects of ABS pressure reduction function, ESC pressure reduction function and ESC active pressure building function of hydraulic brake, focuses on analyzing and solving the related wheel side negative pressure problem and its failure mechanism. Finally, this paper introduces the hydraulic bench test method of designed function, performance verification and failure verification. These methods have strong practicability and engineering application value. This test bench is highly integrated, and the test method has strong practicability and engineering application value.

Key words: Hydraulic ABS/ESC; Pump; Wheel side negative pressure; Failure mechanism