Abstract
Key Words:
Electric water pump, valve, variable temperature.
Abstract
The paper covers the sequential use of an electronically controlled flow proportioning valve, and an electrically powered coolant pump on a 4.0 litre, normally aspirated V8 gasoline engine, producing about 300bhp. The work was conducted within the constraints of the existing 12-volt electrical system, thus the input power to the pump was limited to 400 watts. The use of electronic control enabled a variable coolant temperature control methodology to be employed in place of fixed temperature control. The electrical water pump provided sufficient capacity to cool the engine in all but the most extreme test conditions. Significant fuel savings were obtained with the systems, although the work did highlight issues with the recognised test methods.