Cooling system for hybrid vehicle

Abstract

A cooling system for a hybrid vehicle in which power from an engine and a motor can be transmitted to driving wheels through a clutch and a transmission mechanism may include a heater core fluid-connected to the engine to heat the interior of the hybrid vehicle, using cooling water from the engine, and a heat exchanger which may be arranged in parallel with the heater core and fluid-connected to the engine to receive the cooling water from the engine together with the heater core, and through which ATF (Automatic Transmission Fluid) that has cooled the motor and the transmission mechanism exchanges heat with the cooling water from the engine.

1 . A cooling system for a hybrid vehicle in which power from an engine and a motor can be transmitted to driving wheels through a clutch and a transmission mechanism, the cooling system comprising:
 a heater core fluid-connected to the engine to heat the interior of the hybrid vehicle, using cooling water from the engine; and   a heat exchanger which is arranged in parallel with the heater core and fluid-connected to the engine to receive the cooling water from the engine together with the heater core, and through which ATF (Automatic Transmission Fluid) that has cooled the motor and the transmission mechanism exchanges heat with the cooling water from the engine.   
     
     
         2 . The cooling system as defined in  claim 1 , wherein:
 the heater core is fluid-connected with the engine through a cooling water connection pipe,   the heat exchanger is connected to a diverging connection pipe that diverges from the cooling water connection pipe, and   the diverging connection pipe has a diameter smaller than cooling water connection pipe.   
     
     
         3 . The cooling system as defined in  claim 2 , wherein the diverging connection pipe has a diameter smaller by approximately 20% to approximately 60% than the diameter of the cooling water connection pipe. 
     
     
         4 . The cooling system as defined in  claim 2 , further comprising:
 an engine radiator that cools the cooling water from the engine;   a water pump that pumps up the cooling water to the engine; and   a thermostat that switches a supply state of the cooling water to the engine radiator in accordance with a temperature of the cooling water.   
     
     
         5 . The cooling system as defined in  claim 4 , further comprising an ETC (Electronic Throttle Control) through which the cooling water passing through the heat exchanger is selectively controlled to pass, wherein the ETC is disposed in parallel with the heater core and in series with the heat exchanger on the diverging connection pipe. 
     
     
         6 . The cooling system as defined in  claim 2 , further comprising an ETC (Electronic Throttle Control) through which the cooling water passing through the heat exchanger is selectively controlled to pass, wherein the ETC is disposed in parallel with the heater core and in series with the heat exchanger on the diverging connection pipe.