Abstract
An engine performance prediction becomes necessary for shortening of a period of development. In particular a performance prediction of thermal management is important because relevance with the other part is high vehicle layout, the engine main body. Currently, the heat performance that a prediction is difficult is a rise of oil temperature in engine when a vehicle ran heat full load. There is literature predicting temperature of oil by one dimension of circuit, but there is the next problem.
1)A solution method when oil temperature is only one that oil, water flow rate is controlled of a coolant, and number of solution method is not sufficient.
2)The mechanism that oil temperature changes in the engine main body cannot be calculate.
Oil temperature prediction in three dimensions in engine becomes necessary. As for the prediction of temperature of oil of three dimensions, there are problems such as calculation time, model scale. In order to solve this problem, we calculate separately each boundary condition such as a coolant, circulation flow quantity of oil, and a combustion gas condition. We input each calculated boundary condition into heads, a block, a coolant jacket; an oil passage of three dimensions after experiment value revision, theory revision and analyze heat fluid - structure. I can reduce analysis time, model scale by an above-mentioned calculation. Analysis value by this technique is good correlations for experiment value so that we can plan to thermal management at an early development phase.
Keywords:Oil temperature, Simulation, Engine, Oil curcuit, Coolant curcuit