Method and control device for triggering solenoid valves assigned to gas-exchange valves

US7472017B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rolf Jaros · Backnang, DE
• Hubert Schweiggart · Stuttgart, DE
• Ulf Pischke · Stuttgart, DE
• Hermann Gaessler · Leinfelden, DE

Key dates

• Filing date: Jun 24, 2003
• Grant date: Dec 30, 2008
• Expiry date: Jun 24, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for triggering solenoid valves assigned to gas-exchange valves in an electrohydraulic valve activation of an internal combustion engine having a plurality of combustion chambers. The solenoid valves assigned to the gas-exchange valves may be activated independently of each other. To this end, crankshaft-synchronous trigger signal for solenoid valves of the internal combustion engine are ascertained in a control unit and transmitted to an output stage. The output stage controls the solenoid valves on the basis of the transmitted trigger signals. Each combustion chamber of the internal combustion engine has at least one intake valve and at least one discharge valve as gas-exchange valve. All solenoid valves of all gas-exchange valves of a combustion chamber form a solenoid-valve set. One activation profile in each case is specified for all solenoid valves of a solenoid valve set. In the control unit, a crankshaft-synchronous activation signal is ascertained for each combustion chamber and supplied to the output stage. The output stage triggers the solenoid valves of the solenoid-valve set on the basis of the activation signal of the cylinders according to the activation prof…