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It is important to consider powertrain cooling performance, when engine is applied to new vehicle. If theperformance is poor, engine will be damaged by overheating. But, the development timing of engine is faster thantiming of vehicle, it is difficult to test the cooling performance of new engine and vehicle. In this study the powertaincooling performance was estimated with some test and calculation data. First, the heat rejection test was conducted. From this test, the heat rejection data at required rpm and load was acquired. Second, coolant flow test was conducted.From this test coolant flow rate to radiator was measured. Then engine torque and rpm was calculated from vehicle load and speed. Vehicle load and speed was calculated from test mode. Then by comparing these data, the powertraincooling performance was estimated. Key Words : Coolant Flow Data, Heat Rejection Rate, PTC (Powertrain Cooling Performance) * Corresponding Author : Sunki Min(Ajou Motor College)Tel: +82-10-9072-2658 email: skmin@motor.ac.krReceived January 29, 2015 Accepted May 7, 2015Revised (1st March 20, 2015, 2nd May 6, 2015)Published May 31, 2015 |
