Hydraulic or pneumatic pump for supplying compressed oil of an automatic gearing mechanism comprises a suction tube with a wall which is completely or partially elastic so that the tube is deformed when a fuel is passed through

摘要

Hydraulic or pneumatic pump comprises a suction tube (5) with a wall which is completely or partially elastic so that the tube is deformed when a fuel is passed through the tube based on the fuel component produced by the flow speed in the direction of the axis of the tube depending on the conveying stream. The tube cross-section is reduced, the throttle resistance is increased and the conveying amount of the pump reduced. Preferred Features: The suction tube wall is made completely or partially from an elastomer which has increased ridigity at low temperatures and the suction tube has a cross-section tapering at low temperatures.