Methodology for extending the high load limit of HCCI operation by adjusting injection timing and spark timing

US7899601B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Hanho Yun · Oakland Charter Township, US
• Nicole Wermuth · Garching bei München, DE
• Paul M. Najt · Bloomfield Hills, US
• Jun-Mo Kang · Ann Arbor, US
• Gunter Gräwert · Langen (Hessen), DE

Key dates

• Filing date: Mar 2, 2009
• Grant date: Mar 1, 2011
• Expiry date: May 12, 2029

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 an internal combustion engine including extended operation in a homogeneous charge compression ignition mode at high loads includes operating the engine in the homogeneous charge compression ignition mode including spark-assisted ignition, monitoring an engine load, monitoring an engine speed, determining the engine to be in a high ringing range based upon the engine load and the engine speed, and when the engine load is in the high ringing range, operating the engine in a reduced ringing mode. The reduced ringing mode includes modulating a fuel injection timing according to a calibrated maximum combustion chamber cooling fuel injection timing, determining a preferred combustion phasing value, and modulating a spark timing based upon the modulated fuel injection timing and the preferred combustion phasing value.