Method for the cylinder-selective knock control of an internal combustion engine

US6330874A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wojciech Cianciara · Grünthal, DE
• Gerhard Fischer · Darmstadt, DE
• Thomas Haug · Manitowoc, US

Key dates

• Filing date: Dec 22, 2000
• Grant date: Dec 18, 2001
• Expiry date: Dec 22, 2020

Classification

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

Abstract

The total ignition angle ZW(z) of each cylinder z is composed of cylinder-selective values basic ignition angle GZ(z) {determined by engine speed n and load L}, knock adjustment angle KNK(z), in addition to a first adaptation value AD1(z) and a second adaptation value AD2 common to all cylinders. AD1(z) is increased when KNK(z) is greater than a threshold DEC and is reduced when KNK(z) is lower than a threshold INC. The second adaptation value AD2 is formed as a function of the average value AD1+L of the adaptation values of all cylinders.