Experimental Analysis of Engine Cooling Performance of a Real Passenger Car, Considering Various Radiator Fan and ECU Strategies

One of the most important aspects of designing passenger cars is the engine cooling. This process would significantly affect the vehicle performance. This study has been conducted both theoretically and experimentally to reveal the influences of different involved parameters of cooling. The current research is implemented in order to examine the effects of ۲-speed radiator fan utilization rather than the ۱-speed type. For this aim, the new modified fan is considered and the experimental data are obtained to compare the results with those of the old one. Additionally, the effects of parameters such as ECU strategy, radiator fin density as well as the radiator plate geometrical properties are considered in the analysis. As a prominent result, the experimental results show a substantial effect of considering ۲-speed radiator fan and choosing a better strategy for ECU on the cooling performance in the vehicle. The experimental results show that employing ۲-speed fan instead of single-speed and ۹۰۰ fin/m fin density instead of ۷۸۰ fin/m decreases coolant outlet temperature of radiator by ۶.۱% and ۷.۱% in the same condition, respectively.

Keywords:

Cooling , ECU strategy , Radiator , Fan speed , Fin density.