Device for determining the ignition advance angle of an internal combustion engine

US5992385A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Werner Hess · Stuttgart, DE
• Hong Zhang · Schwieberdingen, DE

Key dates

• Filing date: Dec 10, 1997
• Grant date: Nov 30, 1999
• Expiry date: Dec 10, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for determining the ignition-advance angle of an internal combustion engine, having a device for determining the ignition-advance angle from stored maps on the basis of the recorded parameters of the internal combustion engine, includes a knock control device. The additive ignition-advance angle adjustment defined in the knock control device is able to be added to the ignition-advance map angle to define a base ignition-advance angle. A setpoint torque interface is supplied with the base ignition-advance angle and, at its output, supplies a torque-optimized setpoint ignition-advance angle. The torque-optimized setpoint ignition-advance angle is routed to at least one downstream limiting stage, which limits the setpoint ignition-advance angle to a value that is acceptable for the operation of the internal combustion engine. The output ignition-advance angle is available at the output of the at least one limiting stage for controlling the ignition.