CAJ | 학술논문

针对电子液压制动系统的设计缺乏理论指导的问题，在建立电子液压制动系统数学模型的基础上，提出基于安全特性的电子液压制动系统匹配设计方法；通过试验验证所建立的数学模型的有效性，分析电子液压制动系统在普通制动和硬件失效下的制动性能。研究表明：基于安全特性考虑应保证在电机泵失效的情况下蓄能器仍能使车辆完成数次大强度制动；而电机泵的设计应兼顾期望的充液时间以及蓄能器失效下的保持车辆制动性能；备用制动回路作为电子液压制动系统系统的硬件冗余，要求其在蓄能器和电机泵均失效的情况下提供一定的制动能力。仿真分析表明：基于安全特性的电子液压制动系统匹配设计方法能够在正常情况和硬件失效的情况下均能保证车辆的制动安全性。
침대전자액압제동계통적설계결핍이론지도적문제，재건립전자액압제동계통수학모형적기출상，제출기우안전특성적전자액압제동계통필배설계방법；통과시험험증소건립적수학모형적유효성，분석전자액압제동계통재보통제동화경건실효하적제동성능。연구표명：기우안전특성고필응보증재전궤빙실효적정황하축능기잉능사차량완성수차대강도제동；이전궤빙적설계응겸고기망적충액시간이급축능기실효하적보지차량제동성능；비용제동회로작위전자액압제동계통계통적경건용여，요구기재축능기화전궤빙균실효적정황하제공일정적제동능력。방진분석표명：기우안전특성적전자액압제동계통필배설계방법능구재정상정황화경건실효적정황하균능보증차량적제동안전성。
The design of the electronic hydraulic brake system in general is lack of theoretical guidance. In this experiment, the structure and working principle of the electronic hydraulic brake system were analyzed in detail. Then the matching design method for the electronic hydraulic brake system based on safety feature was proposed on the basis of establishment of the mathematical model, including the design of power supply based on the hardware failure protection, the design of emergency brake circuit based on power supply failure protection, the design of the inlet and outlet valves based on the emergency braking requirements. The effectiveness of mathematical model was validated through the experiments, and the braking performance of electronic hydraulic brake system in both the common brake and hardware failure was analyzed. The hardware in loop test results showed that the booster response time of electronic hydraulic brake system was reduced when compared with the conventional hydraulic brake system under the normal braking. The electronic hydraulic brake system could control the wheel slip ratio in high adhesion road, low adhesion road and docking the road very well under emergency braking. Also, after using the accumulator brake vigorously for five times, the accumulator pressure was not less than the minimum system pressure in the case of electrical failure indicating that the design of accumulator met the requirements. In addition, the booster response time increased in the case of accumulator failure showing that although the motor pressure rated was higher than the system maximum working pressure but it had low flow rate. Furthermore, in the accumulator and the motor failure cases, the electronic hydraulic brake system still could provide part of the braking intensity which was higher than design required 3 m/s2 braking deceleration. Conclusions from the research included the accumulator should guarantee to complete several intensive braking under the condition of motor pump failure considering the demand of security features. The design objects of motor pump should give attention to its expected charging time and maintain automobile braking performance in case of accumulator failure. The emergency braking circuit should provide a certain amount of braking ability under the condition of accumulator and motor pump failure as a hardware redundancy of the electronic hydraulic brake system. Simulation analysis showed that the matching design method of the electronic hydraulic brake system based on safety feature can guarantee the automobile braking safety both in normal condition and hardware failure. At present there are still some problems worth further study. For example, how to adjust design parameters to control the effective volume of the accumulator not too big, the influence of system parameters such as the system maximum working pressure and the minimum working pressure on the braking performance of the electronic hydraulic brake system, putting forward the method to optimize the design parameters of the electronic hydraulic brake system to improve its braking performance and so on.