Method for operating a spark ignited engine

US10641190B2 · kind B2 · utility

Assignee

• Innio Jenbacher GmbH & Co OG · AT

Inventors

• Friedrich Gruber · Hippach, AT
• Nikolaus Spyra · Innsbruck, AT
• Christian TRAPP · Hall in Tirol, AT
• Georg TINSCHMANN · Schwaz, AT
• Ettore Musu · Modena, IT
• Peter Christiner · Graz, AT

Key dates

• Filing date: Nov 2, 2015
• Grant date: May 5, 2020
• Expiry date: Dec 13, 2035

Classification

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

Abstract

A method for operating a spark ignited engine, including forming a combustible mixture by mixing generally homogeneously a first fuel and air and introducing this mixture into the at least one cylinder in an intake stroke, and compressing the combustible mixture with a piston in a compression stroke thereby introducing a part of the combustible mixture into a pre-chamber. During the intake and/or the compression stroke, a second fuel is introduced into the pre-chamber at an introduction-time before start of combustion, and the second fuel is of the same or different chemical composition and/or concentration with respect to the first fuel, and a spark ignites in the prechamber. An amount of second fuel and/or the chemical composition of second fuel introduced to the pre-chamber and/or spark timing of the pre-chamber and/or an in-cylinder charge temperature is chosen such that a desired duration of combustion can be achieved.