Automotive coolant pump apparatus

F - Mech Eng,Light,Heat,Weapons – 01 – P

Patent

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Details

F01P 5/10 (2006.01) F01P 7/16 (2006.01) F04D 29/18 (2006.01) F04D 29/46 (2006.01) F04D 29/56 (2006.01)

Patent

CA 2620924

An automotive coolant pump has movable vanes, which are adjustable as to their orientation in accordance with the temperature of the coolant, whereby the rate of coolant flow through the pump impeller accords with coolant temperature. A thermal-actuator is operated by a thermal-sensor, and serves to rotate a vanes-drive-ring to cause the vanes to change orientation in unison. The cooling system includes a bypass-port, which is open during warmup and closed once coolant has acquired working temperatures; the same thermal- actuator serves also to operate the bypass-port-blocker. Additionally, the same thermal-actuator may serve also to operate a radiator-port-blocker, which serves to block flow through the radiator during engine warmup. The vanes may be arranged to close completely together, and to be sealed at closure. Sealing is effected e.g by elastomeric sealing elements arranged on the appropriate surfaces of the vanes. The vanes lie sandwiched between top and bottom plates, which press the vanes with a small resilient force. The plates and vanes, together with a retainer, form a pre-assembly module. The vanes also are profiled to maximise efficiency over the range of orientations and conditions.

Pompe à liquide de refroidissement pour véhicule automobile dotée d'aubes mobiles dont l'orientation et par là même le débit du rotor de pompe - est réglable en fonction de la température du liquide de refroidissement. Un actionneur commandé par une sonde thermométrique fait tourner une bague qui modifie simultanément l'orientation des aubes. Le circuit de refroidissement comprend un orifice de dérivation qui est ouvert pendant le réchauffage et fermé lorsque le liquide de refroidissement a atteint sa température de marche. Le même actionneur est utilisé pour commander l'obturateur de l'orifice de dérivation. De plus, cet actionneur peut servir à commander l'obturateur de l'orifice de radiateur et couper le flux au radiateur pendant le réchauffage du moteur. Les aubes peuvent être agencées pour se fermer complètement ensemble et former un ensemble hermétique. L'étanchéité est obtenue par des éléments élastomères disposés sur des surfaces convenables des aubes. Les aubes sont prises en sandwich entre des plaques supérieure et inférieure qui exercent sur lesdites aubes une légère force élastique. Plaques et aubes, plus un arrêtoir, forment un module pré-assemblé. Les aubes présentent un profil qui leur confèrent une efficacité maximum sur toute la plage des orientations et des conditions.

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