| US 7,513,229 B2 | ||
| Apparatus for and method of controlling variable valve mechanism | ||
| Ryo Miyakoshi, Isesaki (Japan); Kenichi Machida, Isesaki (Japan); Takahiro Yoshino, Yokosuka (Japan); Masahiro Arai, Yokohama (Japan); and Hatsuo Nagaishi, Zushi (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on Jan. 25, 2007, as Appl. No. 11/657,728. | ||
| Claims priority of application No. 2006-017066 (JP), filed on Jan. 26, 2006. | ||
| Prior Publication US 2007/0186885 A1, Aug. 16, 2007 | ||
| Int. Cl. F01L 1/34 (2006.01) | ||
| U.S. Cl. 123—90.16 [123/90.15] | 20 Claims |
| 1. An apparatus for controlling a variable valve mechanism provided for varying an open characteristic of an intake valve
of an internal combustion engine, comprising:
a first control unit configured to control the variable valve mechanism in accordance with operating conditions of the internal
combustion engine;
a second control unit that controls the open characteristic of the intake valve to such an open characteristic that a flow
velocity of intake air passing through the intake valve becomes almost sound velocity;
a detecting unit configured to detect an amount of air passing through the intake valve, when the open characteristic of the
intake valve is controlled by the second control unit;
a setting unit configured to set a correction value for correcting the open characteristic of the intake valve, on the basis
of the detected amount of the passing air; and
a correcting unit configured to correct a control operation performed by the first control unit on the basis of the correction
value.
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