Control for air suspension is an effective way for improvement of the vehicle comfort.MC9S08GB60 is the control chip and a control unit of electronic control for air suspension of the passenger car is designed based on the quarter vehicle model of YBL6891H-passenger car.Though adjusting air spring’s stiffness

the control unit loweres perpendicular vibration acceleration of the vehicle body.In order to enhance the precision of control

fuzzy PID control algorithm is adopted.The experiment results illustrate the control unit can lower perpendicular vibration acceleration of the vehicle body efficiently

and improve vehicle comfort and manipulation stabilization.