Combustion method for a reciprocating piston internal combustion engine

US7874277B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Walter Huebner · Grasbrunn, DE
• Amin Velji · Karlsruhe, DE
• Sebastian Hensel · Winterthur, CH
• Christof Schulz · Cologne, DE
• Boris Ferdinand Kock · Ratingen, DE
• Norbert Peters · Flensburg, DE
• Olaf Roehl · Aachen, DE
• Konstantinos Boulouchos · Zürich, CH
• Ulrich Spicher · Herxheim, DE

Key dates

• Filing date: Oct 5, 2009
• Grant date: Jan 25, 2011
• Expiry date: Oct 5, 2029

Classification

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

Abstract

A reciprocating engine includes a combustion chamber, and a gas exchange inlet valve and a gas exchange outlet valve for a charge cycle. The method introduces an inlet gas into the combustion chamber in an intake phase; introduces a primary quantity of fuel into the combustion chamber during the intake phase and/or a compression phase; compresses the inlet gas and the fuel in the compression phase; ignites a mixture of inlet gas and fuel formed in the combustion chamber; and expands and discharges an exhaust gas formed by the combustion in an expansion phase. A pilot quantity of fuel is introduced into the combustion chamber before the primary quantity of fuel is introduced. Intermediate products of the pilot quantity of fuel are formed and the primary quantity of fuel is introduced into the combustion chamber during the compression phase such that complete ignition of the mixture consisting of inlet gas and the intermediate products is suppressed and other intermediate products are formed until a controlled ignition of the mixture and other intermediate products occurs.