Study on Energy-Saving Control Strategy of Idling Stop System for City Bus

Fuel economy of city bus is poor, because the urban traffic is congested, the city bus is constantly in the idle condition resulting in fuel consumption is increasing. In order to improve the vehicle fuel economy and protect environment, the energy consumption characteristics of city bus are analyzed, and the energy consumption model is established. The energy-saving mechanism of the idling stop system is studies and proposed the ways of energy-saving that engine stop/start; carrying out regenerative braking. The control strategies of various energy-saving ways have been studied, which are verified using hardware-in-the-loop simulation (HLS) platform. The test results show that fuel economy of city bus with idling stop system increased about 10% for a variety of test cycles.