Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2005-02-15
2005-02-15
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
C073S117020, C123S347000, C123S090150
Reexamination Certificate
active
06856890
ABSTRACT:
In an internal combustion engine wherein a valve timing can be changed in at least two stages and wherein an exhaust gas recirculation passage provided with a control valve is connected to an intake pipe downstream of a throttle valve, there is provided an intake air amount estimation apparatus that estimates, on the basis of an intake pipe pressure, an amount of intake air drawn via the throttle valve. An amount of recirculated exhaust gas flowing past the control valve having a specific opening degree based on an intake pipe pressure in the case of the first valve timing is calculated as an intake exhaust gas amount. On the assumption that this intake exhaust gas amount remains unchanged irrespective of a valve timing, an intake air amount in the case of the second valve timing is calculated.
REFERENCES:
patent: 5590632 (1997-01-01), Kato et al.
patent: 6553964 (2003-04-01), Arai et al.
patent: 20040065303 (2004-04-01), Russell et al.
patent: A 2001-41095 (2001-02-01), None
patent: A 2002-147279 (2002-05-01), None
patent: A 2002-180877 (2002-06-01), None
Kobayashi Daisuke
Muto Harufumi
Toyota Jidosha & Kabushiki Kaisha
Vo Hieu T.
LandOfFree
Intake air amount estimation apparatus and method for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intake air amount estimation apparatus and method for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intake air amount estimation apparatus and method for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3467111