MECHANICAL COMBUSTION-ENGINE-DRIVEN FLUID PUMP

摘要

The invention refers to a mechanical combustion-engine-driven fluid pump (10) comprising an input shaft (20) which is directly driven by the combustion engine (12), a pumping unit (18) with a pump rotor (19), and a magneto-rheological multi-disk clutch (16) between the input shaft and the pump rotor. The dutch comprises . at least two radial input clutch disks (62) and at least two radial output clutch disks (64), the clutch discs defining at least two radial clutch liquid gaps (66) between them filled with a magneto-rheological clutch liquid (28), . a shiftable permanent magnet element (32) being shiftable between an engaged position wherein the permanent magnet element's magnetic field penetrates the clutch liquid gaps with relatively high magnetic flux, and a disengaged position wherein the magnet element's magnetic field penetration flux in the clutch liquid gaps is less than in the engaged position, and . an actuator (42) for moving the permanent magnet element (32) between its engaged and its disengaged position.