초록 ▼

A system for controlling coolant flow in an engine includes a housing where coolant from a radiator and a bypass passage are mixed, the housing enclosing: a water pump having an impeller, a heat responding element downstream from the impeller and having a piston that extends when a temperature is ab

A system for controlling coolant flow in an engine includes a housing where coolant from a radiator and a bypass passage are mixed, the housing enclosing: a water pump having an impeller, a heat responding element downstream from the impeller and having a piston that extends when a temperature is above a predetermined amount, a linkage connected to the piston, and a valve upstream from the impeller and connected to the linkage so extension of the piston causes the valve to open so radiator coolant flows. A bypass valve also upstream from the impeller is connected to the linkage so extension of the piston causes adjustment of opening of the bypass valve, coolant from the bypass passage flowing when the bypass valve is open. The two valves are ganged so total flow is kept constant. A thermistor accelerates the action of the piston by quickly heating the element.

대표청구항 ▼

1. A thermostat that controls coolant flow into an internal combustion engine, comprising:a housing comprising an upstream end, a downstream end, and a mixing area where coolant from a radiator and from a bypass passage are mixed, wherein said mixing area separates said upstream end from said downst

1. A thermostat that controls coolant flow into an internal combustion engine, comprising:a housing comprising an upstream end, a downstream end, and a mixing area where coolant from a radiator and from a bypass passage are mixed, wherein said mixing area separates said upstream end from said downstream end; a plurality of valves disposed in said upstream end of said housing for controlling flow of said coolant entering said upstream end from both said radiator and said bypass passage; and a heat responding element disposed in said downstream end of said housing, said heat responding element operative to control said plurality of valves according to a temperature of said coolant in said downstream end of said housing.