| US 7,478,620 B2 | ||
| Method and apparatus to control a transition between HCCI and SI combustion in a direct-injection gasoline engine | ||
| Tang-Wei Kuo, Troy, Mich. (US); Paul M. Najt, Bloomfield Hills, Mich. (US); Nicole Wermuth, Ann Arbor, Mich. (US); and James A. Eng, Troy, Mich. (US) | ||
| Assigned to GM Global Technology Operations, Inc., Detroit, Mich. (US) | ||
| Filed on May 17, 2007, as Appl. No. 11/749,823. | ||
| Claims priority of provisional application 60/808292, filed on May 25, 2006. | ||
| Prior Publication US 2007/0272202 A1, Nov. 29, 2007 | ||
| Int. Cl. F02B 17/00 (2006.01); F02B 5/00 (2006.01); F01L 1/34 (2006.01); G06F 17/00 (2006.01) | ||
| U.S. Cl. 123—294 [123/481; 123/435] | 22 Claims |
| 1. Method to operate a multi-cylinder direct-injection engine, comprising:
adapting the engine to selectively operate in one of a controlled auto-ignition combustion mode and a spark-ignition combustion
mode;
monitoring engine speed and an operator torque request; and,
selectively deactivating fuel delivery to a portion of the cylinders and selectively increasing torque output from non-deactivated
cylinders to achieve the operator torque request when the operator torque request is within a predetermined, engine speed
dependent torque range.
|