Piston pump
AssigneeRobert Bosch GmbH
InventorsManfred Ruoff, Helmut Rembold, Ernst Linder
Life of this patent
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Abstract
A piston pump which is contemplated for furnishing fuel at high pressure, especially gasoline with low self-lubricating properties. To avoid drive-side wear, a rotatably drive eccentric element is provided as the actuating device for the pump piston of the piston pump, the driving motion of the eccentric element being transmitted to the pump piston via a flexible transmission element.
Claims24
A piston pump having at least one pump cylinder (36, 236), disposed radially relative to a center axis (11) of a drive shaft (2) in a pump housing (1), a pump piston (38, 238) is driven in said cylinder relative to a pump work chamber (48) toward the center axis (11) for its compression stroke by an actuating element, an inlet bore (49) supplies pressure fluid to said pump work chamber and fluid under a higher pressure is forced from the pump work chamber via an outlet (50) which is controlled by a one-way check valve (51), and the actuating element is supported on an eccentric element (12) driven by the drive shaft (2), the actuating element comprises at least a partially annular part (20, 820) rotatably supported on the eccentric element, and a circumferentially flexible transmission element (53, 153,253) is joined to said actuating element on one end and to the pump piston on another end.
Dependencies are inferred from the claim text.