AUTOMATIC TRANSAXLE SYSTEM


  1. CONSTRUCTION


    1. The ATF warmer uses engine coolant that has been warmed by the engine to warm up the ATF quickly and to keep the ATF temperature higher (within limits). Consequently, the friction losses of the automatic transaxle are quickly reduced, thus improving fuel economy.

    2. After warming up the ATF, the engine coolant flows into the ATF warmer to cool down the ATF. In addition, the ATF cooler cools down the ATF using the cooling fins which are provided on the cooler itself, and is fitted inside the radiator grille so that it can be exposed to the air directly while the vehicle is running.

    3. The transmission oil thermostat positioned between the ATF warmer and ATF cooler changes the route through which the ATF flows.

      A01R7R2C01
      *1 ATF Warmer (Transmission Oil Cooler) *2 Transmission Oil Thermostat
      *3 Oil Cooler Assembly - -
      B007WJ2 ATF Flow B007WKJ Engine Coolant Flow

  2. OPERATION


    1. When the ATF temperature is low, ATF is heated by the ATF warmer using the engine coolant, and when the ATF temperature is high, it is cooled down by the ATF warmer and ATF cooler.

      A01R8FNC01
      *1 Automatic Transaxle *2 ATF Warmer (Transmission Oil Cooler)
      *3 Transmission Oil Thermostat *4 Oil Cooler Assembly
      *a ATF Temperature is Low *b ATF Temperature is High

    2. The transmission oil thermostat consists of a poppet valve, a bypass valve and an element case (contains wax). When the ATF temperature changes from low to high, the wax will expand to start to open the poppet valve and close the bypass valve, thus switching the ATF passages.

      A01R80BC02
      *a ATF Temperature is Low *b ATF Temperature is High
      *c To Automatic Transaxle *d From Oil Cooler Assembly
      *e To Oil Cooler Assembly *f From ATF Warmer (Transmission Oil Cooler)
      *g Poppet Valve: Closed *h Bypass Valve: Open
      *i Poppet Valve: Open *j Bypass Valve: Closed
      B007WJ2 ATF Flow - -