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In this paper, a kissing point estimation is proposed for a 2-speed dry-type dual clutch transmission. The kissing point estimation is performed using the gradient change of the motor actuator torque and rotational displacement. Using the kissing point estimation, clamping force control is proposed, and its performance is investigated by the simulator of electric vehicle with 2-speed dry-type dual clutch transmission. It is found from the simulation results that the shift quality can be maintained by the clamping force control using the kissing point estimation.

In this study, a co-operative regenerative braking control algorithm was developed for an electric vehicle (EV) equipped with an electronic wedge brake (EWB) for its front wheels and an electronic mechanical brake (EMB) for its rear wheels. The co-operative regenerative braking control algorithm was designed considering the road friction characteristic to increase the recuperation energy while avoiding wheel lock. A powertrain model of an EV composed of a motor, and batteries and a MATLAB model of the control algorithm were also developed. They were linked to the CarSim model of the vehicle under study to develop an EV simulator. The EMB and EWB were modeled with an actuator, screw, and wedge to develop an EMB and EWB simulator. A co-simulator for an EV equipped with an EWB for the front wheels and an EMB for the rear wheels was fabricated, composed of the EV and the EMB and EWB simulator.