A New Method to Design Cam Used in Automobile Heating, Ventilating and Cooling System

With the automotive air-conditioning industry aiming at better levels of quality, cost effectiveness and short time to market, the need for simulation is at an all time high. In the present study, the airflow control mechanism of an automotive heating, ventilating and cooling module for opening various doors/dampers were kinematically analyzed. A new method for cam design was developed which is faster and simpler than the existing oscillating link method. The existing design was modified for the same output using the new cam design method. It is shown that the torque required in the modified design is lesser than that in the existing design, thus lowering the effort required to rotate the cam from the control panel. © 2012, The Institution of Engineers (India).