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Computer simulation of the behavior of the automotive cooling system is becoming increasingly common, so as to reduce the dependency on costly testing. The simulation of transient cooling system behavior has become easier with the use of 1-D simulation tools. However, accurate prediction of transient coolant temperature after thermostat operation has been limited by the difficulty in accurately modeling the behavior of the automotive thermostat. Physical models of the thermostat are often inaccurate due to the complexity of the thermostat. Therefore an empirical model has been developed, which can be used to model any automotive thermostat, once a few simple tests have been conducted on the part. This thermostat model can be used in conjunction with a 1-D flow simulation tool to predict coolant transient temperature response during thermostat operation.

In the hydrostatic concept, maintenance is an absolute must! There exists at any knowledge level countless texts, guides and etc., on service routine. There is, however, in the final analysis no substitute for the benefits to be derived by contributions that can be made by design and service engineering who have the opportunity of building a practical service routine into the end product. New products are never really destroyed from without, but from a lack of in-depth study in the art of service ability.