Abstract: Based on the physical model of the exhaust turbocharger control mechanism, the mathematical model for the turbine mechanism and the control mechanism is established by the energy balance equation and the force balance equation, which determines the relationship between the boost pressure and the duty cycle of the control solenoid valve. Using PID (proportion-integral-derivative) control mode to control the output duty cycle to make sure the actual boost pressure follows the target boost pressure. The vehicle road test results show that the boost control effect is good. Compared with the pre-pulse control system, the pressure deviation value changes more smoothly. The control system is feasible.

Key words: conservation of energy, turbocharger, PID (proportion integration differentiation) control