The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2011
Filed:
Aug. 12, 2008
Vijay Ramappan, Novi, MI (US);
Allen B. Rayl, Waterford, MI (US);
Jun-mo Kang, Ann Arbor, MI (US);
Peter Kafarnik, Eltville-Erbach, DE;
Matthew A. Wiles, Royal Oak, MI (US);
Hanho Yun, Oakland Township, MI (US);
Vijay Ramappan, Novi, MI (US);
Allen B. Rayl, Waterford, MI (US);
Jun-Mo Kang, Ann Arbor, MI (US);
Peter Kafarnik, Eltville-Erbach, DE;
Matthew A. Wiles, Royal Oak, MI (US);
Hanho Yun, Oakland Township, MI (US);
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).