Search Results

Engine Cooling and Air Conditioning tests were performed using a sports utility vehicle with a V-6 engine. The original vehicle was equipped with an engine driven fan. This vehicle was modified by adding electric motor driven fans, air path sealing and advanced heat exchangers in a predetermined test configuration. Engine cooling performance and air conditioning performance were evaluated at each step. Identical grade load and idle tests were conducted with this vehicle at each step. The V-6 sports utility vehicle was selected due to its use of an engine driven fan. The grade load of 8.7% was selected due to off road use by the consumers. The results of the testing showed that engine cooling performance and air conditioning performance were improved by using electric motor driven fans, air path sealing and advanced heat exchangers.

The objective of this study was to determine the effects of vehicle front end components on engine compartment air flow. Isothermal road tests were conducted on a 1989, four door sedan car having a 3.0 liter V-6 engine and an automatic transmission. The vehicle under study had a combined grille area of 0.1194 square meters. The engine occupied approximately 35% of the under hood plan view area. The air velocities measured at the radiator exit section (between the radiator and the fan shroud) were the data of interest. No coolant was circulating in the OE radiator or heater core, and no refrigerant was flowing in the OE condenser or evaporator. However, constant air temperature runs were accomplished by having a remote radiator installed at the rear of the vehicle for engine cooling during the tests.

The objective of this study was to develop, build and test a vehicular engine cooling module that is lower in air flow resistance and higher in both air-conditioning and engine cooling performance than the experimental vehicle's OE system. These improvements were accomplished using airflow management techniques. The vehicle under study was a 1989 four door sedan, with a 3.0 liter V-6 engine and automatic transmission. The developmental method consisted of four phases: (1) Understanding the effects of front end components on engine compartment airflow; (2) Improvement of airflow characteristics through shroud design; (3) Improvement in heat exchange capabilities and (4) Evaluation of air conditioning and engine cooling system performance on the road.