带有制动能量再生系统的公共汽车制动过程

Braking course of city bus with regenerative braking system

带有制动能量再生系统汽车的制动过程与传统汽车的制动过程有所不同.通过对城市公共汽车再生制动力矩和车轮液压制动模型的分析,把再生制动力矩折算成相应的液压制动踏板行程,从而使再生制动力矩产生的制动感觉和液压制动感觉一致.对纯再生制动模式、紧急制动模式和一般制动模式三种情况下的制动距离进行分析计算,提出了城市公共汽车再生制动的控制策略.结果表明,制动安全主要取决于紧急制动距离,而制动能量回收的多少主要取决于纯再生制动模式和一般制动模式下的制动距离.推导出的紧急制动距离公式在设计带有能量再生制动系统汽车时,可用于计算、校核其制动安全距离.

The braking course of a city bus with regenerative braking system is different from that of traditional bus. By analyzing regenerative braking moment and wheel hydraulic braking model, regenerative braking moment is converted to hydraulic-brake pedal travel and the sense of regenerative braking is united with traditional braking sense. The braking distances in pure regenerative braking mode, emergency braking mode and general braking mode are studied and computed. Based on the discussion, the regenerative braking control strategy of a city bus is proposed. Computing results showed that braking safety depends on emergency braking distance and the amount of regenerative braking energy depends on the braking distance of pure regenerative braking mode and general braking mode. In the design of vehicle with regenerative braking system, the deduced formula of emergency braking distance can be used to compute and check braking safety distance.