Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-09-19
2006-09-19
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
C073S118040
Reexamination Certificate
active
07110878
ABSTRACT:
A differential pressure type emission flow rate measuring method and apparatus and an emission measuring system are capable of correcting measuring error occurring due to pulsation appropriately and enhancing the measuring precision of flow rate. In measuring the flow rate of an emission exhausted from an engine, an accurate flow rate in spite of pulsation is determined by using a differential pressure type flowmeter. The detected differential pressure signal is resolved by frequency, and is corrected by using a correction coefficient predetermined depending on each frequency obtained by frequency resolution.
REFERENCES:
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 5613479 (1997-03-01), Gates et al.
patent: 6138504 (2000-10-01), Lewis et al.
patent: 6553764 (2003-04-01), Gladden et al.
patent: 6718768 (2004-04-01), Shaffer
Adachi Masayuki
Aoki Shintaro
Asano Ichiro
Nakamura Hiroshi
Senda Jiro
Brooks & Kushman P.C.
Horiba Ltd.
Vo Hieu T.
LandOfFree
Method and apparatus for measuring exhaust gas flow rate and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring exhaust gas flow rate and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring exhaust gas flow rate and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3606755