Common-rail system comprising a controlled high-pressure pump as a second pressure regulator

US6578553B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Schubert · Kaarst, DE
• Andreas Kellner · Birkenau, DE

Key dates

• Filing date: Dec 8, 2000
• Grant date: Jun 17, 2003
• Expiry date: Dec 8, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/31
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method and a device are described for controlling an internal combustion engine, particularly an internal combustion engine that has a common-rail system. At least one pump delivers fuel into an accumulator. A pressure in the accumulator is detected. A distinction is made between at least one first operating state and at least one second operating state based on at least one speed signal and/or one load signal. At least one first pressure-control device is used to adjust the pressure in the at least one first operating state. At least one second pressure-control device is used to control the pressure in the at least one second operating state.