Fuel e.g. petrol, supply system for use in motor vehicle areas, has hydraulic system that is independent of electrical system and its effects and self sufficiently operated, and brushless screw pump operated by controller

摘要

The system has a pre-supply pump that is driven by a brushless direct current motor, which is characterized by carbon brush commutation. The pre supply pump is operated with high overall and constant efficiency. A brushless screw pump is operated by an electronically commutated controller, which operates the screw pump with constant rotation speed. A hydraulic system is independent of an electrical system and its effects and is self sufficiently operated.