| 摘要 |
<p>A hydraulic variable capacity pump designed as a pump with an internal pinion, in which the teeth of the outer wheel (1) and the inner wheel (3) are inter-meshed between the intersection points of the tooth tip circles. As a result, tooth-cells are formed in the outlet region. The tooth-cells lead into an outlet passage common to all via outlet passages (48) which are arranged at a distance from the teeth and are closed each time by a return valve. The inlet is connected by two or three passages with the tank, the first of which is provided with a fixed throttle (37) and the second is controlled by a pressure control valve (39) operating as a function of the pressure prevailing in the compression chamber (51), and the third is controlled by an electromagnetic valve (59) as a function of other operating parameters.</p> |
