| US 7,488,273 B2 | ||
| Cylinder deactivation for a motorcycle engine | ||
| Thomas Carl, Hartford, Wis. (US); Earnest Metz, Wales, Wis. (US); Matthew Peller, Milwaukee, Wis. (US); Benjamin Wright, Sullivan, Wis. (US); Kyle G. Wick, Menomonee Falls, Wis. (US); William P. Pari, Sussex, Wis. (US); and David L. Zwart, Wauwatosa, Wis. (US) | ||
| Assigned to Harley-Davidson Motor Company Group, Inc., Milwaukee, Wis. (US) | ||
| Filed on Jun. 30, 2006, as Appl. No. 11/427,801. | ||
| Prior Publication US 2008/0004158 A1, Jan. 03, 2008 | ||
| Int. Cl. B60W 10/02 (2006.01); B60W 10/06 (2006.01) | ||
| U.S. Cl. 477—181 | 19 Claims |
| 1. A method of reducing heat produced by an internal combustion engine in a motorcycle, the method comprising:
providing a motorcycle including an internal combustion engine, the internal combustion engine including at least one cylinder
at least partially defining a combustion chamber;
supplying fuel pulses to the combustion chamber at least once per engine cycle;
operating the motorcycle at a low speed condition;
withholding at least a portion of at least one fuel pulse from at least one engine cycle to the combustion chamber when operating
the motorcycle at the low speed condition; and
resuming fuel pulses at every engine cycle to the combustion chamber when the motorcycle is no longer operating at the low
speed condition, wherein the motorcycle is no longer operating at the low speed condition when at least one of the following
conditions is met;
an engaged clutch position, and
an acceleration enrichment greater than 1 millisecond.
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