Spark timing and control during transitions between spark ignited combustion and homogenous charge compression ignition

US7975668B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Vijay Ramappan · Novi, US
• Allen B. Rayl · Waterford, US
• Jun-Mo Kang · Ann Arbor, US
• Peter Kafarnik · Eltville am Rhein, DE
• Matthew A. Wiles · Royal Oak, US
• Hanho Yun · Oakland Charter Township, US

Key dates

• Filing date: Aug 12, 2008
• Grant date: Jul 12, 2011
• Expiry date: Sep 3, 2028

Classification

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

Abstract

A control system for an engine comprises an air per cylinder (APC) generating module that generates measured and desired APC values. A combustion transition module selectively transitions the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion. A spark control module selectively retards spark during the transitions based on a ratio of the measured APC value and the desired APC value. Alternately, spark retard can be based on measured and desired engine torque representing values (ETRVs).