| 摘要 |
A housing (1) has a chamber (10) comprising fluid accesses (41, 42, 43, 44), at least one of which can be plugged by a plug (2); a reversible motor (6) equipped with a rotary shaft is connected to the plug by a coupling (7) involving a screw-nut system (71) to move it in translation towards plugging or uncovering the pluggable access (41) according to the temperature of a stream of fluid travelling through the device; and a thermostatic element (8) located in the same stream of fluid actuates the plug if the motor or its controls fail. In order to prevent the plug (2) from then reverting to its initial position when the element (8) retracts, the coupling (7) is inelastic and the screw-nut system (71) is reversible so that when the plug is actuated by the thermostatic element, the motor (6) is made to rotate. Use: internal combustion engine cooling circuit.
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