Fuel transfer unit e.g. alveolar pump, for internal combustion engine, has pressure release opening in angular zone extending at certain angle divided by double number of sealing units and number of sealing units in rotational direction

摘要

The unit has a pressure release channel (65) with a pressure release opening (66) provided in an angular zone of the channel. The zone extends at an angle of 360 degrees divided by double the number of sealing units, in a direction of rotation from a wide gap towards an inlet (33) of a pump chamber. The zone extends at an angle of 360 degrees divided by the number of units in the direction from the gap towards an outlet of the chamber. The wide gap is the maximum distance between a rotor and a circulation path.