| US 7,603,224 B2 | ||
| Cam phasing control system for improving regeneration efficiency | ||
| William L. Aldrich, III, Davisburg, Mich. (US); Lyle E. Hamilton, Howell, Mich. (US); James L. Worthing, Munith, Mich. (US); and Donald D. Crites, Washington, Mich. (US) | ||
| Assigned to GM Global Technology Operations, Inc., | ||
| Filed on Dec. 12, 2007, as Appl. No. 11/954,829. | ||
| Claims priority of provisional application 60/952437, filed on Jul. 27, 2007. | ||
| Prior Publication US 2009/0030585 A1, Jan. 29, 2009 | ||
| Int. Cl. B60T 7/12 (2006.01); F01L 1/34 (2006.01) | ||
| U.S. Cl. 701—103 [123/90.15; 123/198 DB] | 19 Claims |
| 1. A system comprising:
a cam position calculation module that determines a current intake cam position and a current exhaust cam position during
operation of an engine, wherein said engine includes a regeneration of power mode and a fuel cut-off (FCO) mode;
a cam position adjustment module that generates an alternate intake cam position and an alternate exhaust cam position when
said engine is operating in said regeneration of power mode and in said FCO mode; and
a cam positioning module that generates a selected intake cam position based on a lower of said current intake cam position
and said alternate intake cam position,
wherein said cam positioning module generates said selected exhaust cam position based on the lower of said current exhaust
cam position and said alternate exhaust cam position, and
wherein said cam positioning module positions intake and exhaust cams of said engine based on said selected intake cam position
and said selected exhaust cam position.
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