The dynamics equation of E-CVT in PSHEV is presented through analyzing its principle

respectively making use of conventional and nonlinear PID theory

the tracking control of the goals for velocity and engine speed in E-CVT is carried out

then the control model is built in MATLAB.The simulation result shows that nonlinear PID control method is valid and the effect at system stability

response speed

dynamic-characteristics is better than conventional PID control. In addition

it can improve acceleration performance largely and reduce braking time

compared with PID algorithm.