Pressurization device for the cooling system of a heat engine
AssigneeRenault Vehicules Industriels
InventorJean-Paul Pernet
Life of this patent
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Abstract
This invention has as its object a pressurization device for a cooling system of a heat engine. According to the invention, the device (10) includes two pressure relief valves (20, 30) mounted in a series, a chamber (32) between the pressure relief valves (20, 30), and a source (34) of gas under pressure connected to the chamber (32). The expansion chamber (12) is not subjected to the scavenging of the pressurization gas, and the maximum value of the pressurization is equal to the sum of the values of the calibrations of the two pressure relief valves (20, 30).
Claims4
A pressurization device for the cooling system of a heat engine, said cooling system comprising an enclosure fed by a source of gas under pressure in which cooling liquid circulates, said pressurization device comprising:
- (a) a chamber connected to the source of gas under pressure;
- (b) a first pressure relief valve disposed between said chamber and the atmosphere, said first pressure relief valve having a first calibration value (T.sub.1) and being oriented so as to vent the pressure in said chamber to atmosphere when it exceeds a predetermined value (P.sub.0 +T.sub.1);
- (c) a second pressure relief valve disposed between said chamber and the enclosure, said second pressure relief valve having a second calibration value (T.sub.2) and being oriented so as to vent the pressure in said enclosure to said chamber when it exceeds the pressure in said chamber;
- and
- (d) a first depression valve disposed between said chamber and the enclosure, said first depression valve having a third calibraton value (T.sub.3) and being oriented so as to vent the pressure in said chamber to the enclosure when it exceeds the pressure in the enclosure.
Dependencies are inferred from the claim text.