| US 7,458,348 B2 | ||
| Method and apparatus for controlling variable valve actuation device in internal combustion engine | ||
| Kenichi Machida, Isesaki (Japan); and Hidekazu Yoshizawa, Isesaki (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on Mar. 27, 2006, as Appl. No. 11/389,502. | ||
| Claims priority of application No. 2005-090616 (JP), filed on Mar. 28, 2005; and application No. 2005-090617 (JP), filed on Mar. 28, 2005. | ||
| Prior Publication US 2006/0219197 A1, Oct. 05, 2006 | ||
| Int. Cl. F01L 1/34 (2006.01) | ||
| U.S. Cl. 123—90.16 [123/90.15; 123/345; 123/346; 123/347; 123/348; 701/103; 701/105] | 13 Claims |
| 1. A variable valve actuation control apparatus for an internal combustion engine, comprising:
a variable valve actuation device which varies a phase of the center of an operating angle of an intake valve and lift characteristics
thereof;
a first learning section that learns an error in intake air quantity which depends on said phase;
a second learning section that learns an error in intake air quantity which depends on said lift characteristics;
a selecting section that operates said first learning section in a region in which an opening area of said intake valve is
determined to be larger than a first threshold, and operates said second learning section in a region in which the opening
area of said intake valve is smaller than a second threshold which is less than or equal to said first threshold; and
a control section that controls said variable valve actuation device, based on said learned errors in intake air quantity.
|