초록 ▼

A method for regulating coolant flow rate to a heat exchanger in an automotive vehicle is described. The method includes the steps of providing a main fluid pump for providing a source of fluid under pressure to the vehicle engine and the heat exchanger and providing a reversible flow auxiliary pump

A method for regulating coolant flow rate to a heat exchanger in an automotive vehicle is described. The method includes the steps of providing a main fluid pump for providing a source of fluid under pressure to the vehicle engine and the heat exchanger and providing a reversible flow auxiliary pump between the main fluid pump and the heat exchanger. The method further includes the steps of generating an engine speed signal and an ambient temperature signal. The auxiliary pump forces fluid against the flow from the main fluid pump when the engine speed signal is greater than a threshold value and forces fluid to the heat exchanger when the ambient temperature signal is below a predetermined value and the engine speed signal is less than the threshold value and within predetermined values. A system is also disclosed for accomplishing the method.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for regulating coolant flow rate to a heat exchanger in an automotive vehicle having an engine operating at different speeds comprising the steps of:providing a main fluid pump for providing a source of fluid under pressure to the engine and the heat exchanger;

[ What is claimed is:] [1.]1. A method for regulating coolant flow rate to a heat exchanger in an automotive vehicle having an engine operating at different speeds comprising the steps of:providing a main fluid pump for providing a source of fluid under pressure to the engine and the heat exchanger;providing a reversible flow auxiliary pump disposed between the main fluid pump and the heat exchanger;measuring engine speed and generating an engine speed signal;measuring ambient temperature and generating an ambient temperature signal; andactivating the auxiliary pump to force fluid against the flow from said main fluid pump when the engine speed signal is greater than a threshold value.