Variable valve actuation control for operation at altitude

Details Variable valve actuation control for operation at altitude Variable valve actuation control for operation at altitude

2005-06-28

2005-06-28

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S115000, C123S090170

Reexamination Certificate

active

06912458

ABSTRACT:
A method of controlling a variable valve actuation system for an engine is provided. A cam assembly is operated to move an intake valve between a first position and a second position. A parameter indicative of an altitude at which the engine is operating is sensed. A first lookup map is accessed to determine a desired air-to-fuel ratio when the sensed parameter indicates that the engine is operating at an altitude below a first predetermined value. A second lookup map is accessed to determine a desired air-to-fuel ratio when the sensed parameter indicates that the engine is operating at an altitude above the first predetermined value. A desired valve actuation period is determined based on the determined air-to-fuel ratio. The intake valve is prevented from returning to the first position until the end of the determined valve actuation period.

REFERENCES:
patent: 3250068 (1966-05-01), Vulliamy
patent: 4424790 (1984-01-01), Curtil
patent: 4561253 (1985-12-01), Curtil
patent: 4815423 (1989-03-01), Holmer
patent: 5408979 (1995-04-01), Backlund et al.
patent: 5445128 (1995-08-01), Letang et al.
patent: 5682854 (1997-11-01), Ozawa
patent: 5927075 (1999-07-01), Khair
patent: 6006706 (1999-12-01), Kanzaki
patent: 6026786 (2000-02-01), Groff et al.
patent: 6082328 (2000-07-01), Meistrick et al.
patent: 6170441 (2001-01-01), Haldeman et al.
patent: 6209516 (2001-04-01), Yamashita
patent: 6213069 (2001-04-01), Wada et al.
patent: 6237551 (2001-05-01), Macor et al.
patent: 6267107 (2001-07-01), Ward
patent: 6273076 (2001-08-01), Beck et al.
patent: 6279550 (2001-08-01), Bryant
patent: 6301887 (2001-10-01), Gorel et al.
patent: 6301889 (2001-10-01), Gladden et al.
patent: 6302076 (2001-10-01), Bredy
patent: 6360531 (2002-03-01), Wiemero et al.
patent: 6467452 (2002-10-01), Duffy et al.
patent: 6571765 (2003-06-01), Kuboshima et al.
patent: 6651618 (2003-11-01), Coleman et al.
patent: 6688280 (2004-02-01), Weber et al.
patent: 1 389 673 (2004-02-01), None
patent: 05106415 (1993-04-01), None
patent: 2000120457 (2000-04-01), None
patent: 2000145484 (2000-05-01), None
patent: WO 98/02653 (1998-01-01), None
Edwards et al., “The Potential of a Combined Miller Cycle and Internal EGR Engine for Future Heavy Duty Truck Applications,” The Engineering Society for Advancing Mobility Land Sea Air and Space International, International Congress and Exposition, Feb. 23-26, 1998, pp. 1-19.
Obert, “Internal Combustion Engines and Air Pollution,” Based on Internal Combustion Engines, Third Edition, 1973, pp. 612-614.
Challen et al., “Diesel Engine Reference Book, Section Edition, ”SAE International, 1999, pp. 75, 81, 84, 146, and 263-305.
Yorihiro Fukuzawa et al., “Development of High Efficiency Miller Cycle Gas Engine”, Mitsubishi Heavy Industries, Ltd. Technical Review, vol. 38, No. 3, Oct. 2001, pp. 146-150.
Request forInter PariesReexamination Transmittal Form for U.S. Appl. No. 6,688,280, and Attachment to Request for Inter Parties Reexamination Transmittal Form, Sep. 17, 2004.
Request forInter PariesReexamination Transmittal Form for U.S. Appl. No. 6,651,618, and Attachment to Request for Inter Parties Reexamination Transmittal Form, Aug. 27, 2004 http://www.mazda.com.au/corpora/209.html, Oct. 16, 2001, pp. 1-6.

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