Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2008-04-16
2009-11-10
Moulis, Thomas N (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S690000, C123S694000, C123S695000
Reexamination Certificate
active
07614391
ABSTRACT:
A correction apparatus for correcting an output of an oxygen sensor installed in an exhaust pipe of an internal combustion engine to measure the concentration of oxygen contained in exhaust gas. The apparatus works to execute a fuel cut operation to bring the pressure in the exhaust pipe to the atmospheric pressure and enters an under-atmosphere correction mode to sample an output of the oxygen sensor and determine a correction factor compensating for a deviation of the sampled output from a reference value representing an actual concentration of oxygen. The apparatus also works to calculate the pressure in the exhaust pipe after start of the fuel cut and determine whether the under-atmosphere correction mode is to be entered or not based on the pressure of exhaust gas, thereby ensuring the accuracy in correcting the output of the oxygen sensor regardless of a variation in the pressure of exhaust gas.
REFERENCES:
patent: 4601809 (1986-07-01), Kitahara
patent: 5179929 (1993-01-01), Miyashita et al.
patent: 5323635 (1994-06-01), Ueno et al.
patent: 5357754 (1994-10-01), Ogawa et al.
patent: 5615550 (1997-04-01), Ogawa et al.
patent: 5797384 (1998-08-01), Kitagawa et al.
patent: 7367330 (2008-05-01), Yoshidome
patent: 2007/0023020 (2007-02-01), Yoshidome
patent: 10-212999 (1998-08-01), None
patent: 2003-003903 (2003-01-01), None
patent: 2003-269240 (2003-09-01), None
patent: 2007-032466 (2007-02-01), None
Japanese Office Action dated Dec. 2, 2008 issued in corresponding Japanese Application No. 2007-109614, with English translation.
Kawase Tomoo
Kurokawa Eiichi
Masuko Takahito
Nakabayashi Katsuhiko
Sugiura Koji
Denso Corporation
Moulis Thomas N
Nixon & Vanderhye PC
LandOfFree
Oxygen sensor output correction apparatus for internal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxygen sensor output correction apparatus for internal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen sensor output correction apparatus for internal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4095602