Device for rapidly building-up pressure in a device of a motor vehicle, said device being supplied with a pressure medium by means of a feed pump

US6497215B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hermann Gaessler · Leinfelden, DE
• Udo Diehl · Stuttgart, DE
• Karsten Mischker · Leonberg, DE
• Rainer Walter · Pleidelsheim, DE
• Bernd Rosenau · Asperg, DE
• Juergen Schiemann · Markgröningen, DE
• Christian Grosse · Kornwestheim, DE
• Georg Mallebrein · Stuttgart, DE
• Volker Beuche · Stuttgart, DE
• Stefan Reimer · Markgröningen, DE

Key dates

• Filing date: Oct 24, 2001
• Grant date: Dec 24, 2002
• Expiry date: Oct 24, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M63/0225
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Described is an apparatus for rapid pressure buildup in a motor vehicle reservoir-type injection system (common rail) supplied with fuel by a high-pressure pump, the apparatus including a piston, which defines a pressure chamber that can be enlarged counter to the force of a spring element prestressed counter to the piston, which pressure chamber communicates with the feed pump and with the device supplied with the pressure medium. A locking device acting on the piston is provided, by which the piston can be locked in a locking position, assumed as a result of the pressure, built up in the pressure chamber by the feed pump, counter to the prestressing of the spring element and can be untensed after unlocking into a position that reduces the size of the pressure chamber. By the relaxation of the spring, the system pressure is built up suddenly.