Technical Paper
Determination of Time Variant 1D-3D Temperature and Heat Transfer Distribution Inside the Cooling Jacket of a SI Engine Cooling System after Key-Off
2012-04-16
2012-01-0642
This research work focuses on the unsteady heat transfer and temperature distribution over the engine cooling jackets. The efforts are gestated to generate the time-dependent effects of heat transfer from the combustion chamber to the cooling jacket of a 4-cylinder 1.6-L cam-profile switching system SI engine. The characteristic behavior of heat transfer to the coolant at lower speed (idle speed/traffic signal) or when the engine is shut down after driving the vehicle for a significant period manifests unstable temperature rise with respect to time. It has been observed that the temperature of the coolant inside the jacket rises up within a very short period of time. It can be a case due to the shut off of the actuators (coolant pump, fan) which helps the cooling system to take effect according to the demand of the thermal efficiency of the engine.
