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A new type of powertrain system was developed for electric hybrid vehicles. It is mainly composed of engine, first electric motor, first shaft, synchronizer mechanism, second electric motor, planetary gear set and second shaft. The adoption of one planetary gear set and synchronizer mechanism make it can be operated in four different operation modes with high energy efficiency and lower cost, its four operation modes are pure electric driving, hybrid driving, independent engine driving and regenerative braking. These four operation modes can fit the vehicle practical conditions according to order from the control system.

A new powertrain system was developed for electric vehicle driving application with adoption of one electric motor and one set of planetary gear set. With the control of fork, the sleeve of synchronizer can mesh two different parts on the left and right side; the system can provide pure electric driving, hybrid driving and regenerative braking operation modes to meet vehicle practical conditions. It can reduce both power train structure size and cost with fewer parts.

A new type of electric power train system was designed for fully hybrid electric city bus, which is mainly composed of engine, power coupling mechanism, first motor, second motor, motor controller, power train controller, power battery, and Drive axle. Its main characteristics of power coupling mechanism is adoption of one planetary gear set to realize the function that can be provided by two planetary gear sets. The new power train can be manufactured with lower cost because of its simple structure with higher transmission efficiency and less faults such as oil leakage. The new system can provide five operation modes for city bus, which are hybrid driving, pure electric driving, regenerative braking, grid charging, and stop charging.

A new kind of power train was developed for low speed lorry with top speed less than 70km/h. this new hybrid power train is mainly consisted of clutch, transmission, engine, engine controller, vehicle controller, power battery, electric motor, and main differential. The main differential has a set of gear for power input, which is for engine and motor power coupling. This new system can provide pure engine driving, pure motor driving, hybrid driving, and braking energy regeneration according to different conditions, which can save energy and improve efficiency.

A new type power steering system was developed for electric hybrid city bus. It is mainly composed of fluid reservoir, electric motor, steering pump, safety valve, solenoid, pressure sensor, hydraulic cylinder, braking air tank, controller, steering wheel, steering angle sensor, steering control valve, mechanical steering mechanism, steering power cylinder. Its main idea is based on using of pressure from braking air tank to push a cylinder to generate hydraulic pressure. It can provide enough pressure for steering needing timely. And the steering pump does not need working at the time of no steering requirement. The application of a new type power steering system can save energy to improve fuel efficiency.

A new type of electric power train system was designed for fully hybrid electric city bus, which is mainly composed of engine, power coupling mechanism, first motor, second motor, motor controller, power train controller, power battery, and Drive axle. Its main characteristics of power coupling mechanism is adoption of one planetary gear set to realize the function that can be provided by two planetary gear sets. The new power train can be manufactured with lower cost because of its simple structure with higher transmission efficiency and less faults such as oil leakage. The new system can provide five operation modes for city bus, which are hybrid driving, pure electric driving, regenerative braking, grid charging, and stop charging.

The ABS, motor, Battery, fly wheels, wheel and roller are used to built test bench to measure coordinate control strategy between ABS braking and regenerative braking. The test bench can also be used to simulate engine brake during vehicle deceleration, and ABS control methods. This can reduce development time and cost effectively.

If static model of brake pipe pressure and torque model were used in brake system analysis and neglect their dynamic performance, it could cause bigger difference between simulation results and real condition. Some main dynamic models from experiments research are presented with brief introductions.