AIR CONDITIONING SYSTEM


  1. CONSTRUCTION


    1. Individual servo motors are used for the fresh/recirculation damper, the driver and front passenger mode switching damper, the driver side and front passenger side air mix control dampers and rear mode switching damper.

    2. A No. 1 air conditioning radiator damper servo sub-assembly that combines three types of servo motors (for the driver mode switching damper and for the air mix control damper of both the driver seat and front passenger seat) is used.

    3. A pulse pattern type servo motor that controls by communicating over the bus wire with the air conditioning amplifier assembly is used for each servo motor. Along with using pulse pattern type servo motors, smart connectors contain ICs that have such functions as communicating with the air conditioning amplifier assembly.

    4. The installation positions for the servo motors are on the side of the blower assembly for the Fresh/Recirculation damper servo motor, and on the side of the air conditioning unit assembly for the No. 1 air conditioning radiator damper servo sub-assembly.

      Figure 1. Front Air Conditioning Unit (LHD Models)

      B0055DHC01
      *1 NO.1 BLOWER DAMPER SERVO SUB-ASSEMBLY (FRESH/RECIRCULATION DAMPER) *2 NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR PASSENGER MODE DOOR)
      *3

      NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY


      • DAMPER SERVO (FOR DRIVER MODE DOOR)

      • DAMPER SERVO (DRIVER SIDE AIR MIX)

      • DAMPER SERVO (PASSENGER SIDE AIR MIX)

      		 *4 NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR REAR MODE DOOR)

      Figure 2. Front Air Conditioning Unit (RHD Models)

      B0055KDC02
      *1 NO.1 BLOWER DAMPER SERVO SUB-ASSEMBLY (FRESH/RECIRCULATION DAMPER) *2 NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR PASSENGER MODE DOOR)
      *3

      NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY


      • DAMPER SERVO (FOR DRIVER MODE DOOR)

      • DAMPER SERVO (DRIVER SIDE AIR MIX)

      • DAMPER SERVO (PASSENGER SIDE AIR MIX)

      		 *4 NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (FOR REAR MODE DOOR)

      Figure 3. Rear Cooling Unit Assembly

      B0055F4C01
      *1 No. 1 Rear Cooling Unit Damper Servo Sub-assembly (Air Mix) *2 No. 2 Rear Cooling Unit Damper Servo Sub-assembly (Mode Switching)

  2. OPERATION


    1. Pulse Pattern Type Servo Motor


      1. In contrast to the previous type that detects the position by way of a potentiometer voltage, the pulse pattern type servo motor detects the relative position by way of the 2-bit on/off signals.

      2. The forward and reverse revolutions of this motor are detected by way of 2 phases, A and B, which output 4 types of patterns. The air conditioning amplifier assembly counts the number of pulse patterns in order to determine the stopped position.

        B0055E2E04