Air flow rate measuring device having bypass passage

Details Air flow rate measuring device having bypass passage Air flow rate measuring device having bypass passage

2007-06-26

2007-06-26

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

Proportional

C073S202000, C073S202000

Reexamination Certificate

active

11108797

ABSTRACT:
A measurement body is provided with a sub-outlet arranged between a U-turn portion of a bypass passage and a main outlet. The sub-outlet includes a first sub-outlet positioned on a path of air, which flows on the inside of the bypass passage, and a second sub-outlet positioned on a path of air, which flows on the outside of the bypass passage. The respective sub-outlets open in a sidewall surface of the measurement body along the thickness-wise direction. However, the first sub-outlet and the second sub-outlet are arranged in different positions with respect to the flow direction of measurement air. With this structure, a substantial length of the bypass passage can be adjusted in accordance with positions of the first sub-outlet and the second sub-outlet, so that compensation of intake pulsation is enhanced in accuracy. Thereby, measurement error caused by influences of intake pulsation can be reduced.

REFERENCES:
patent: 5804718 (1998-09-01), Nagasaka et al.
patent: 6223594 (2001-05-01), Takiguchi et al.
patent: 6526822 (2003-03-01), Maeda et al.
patent: 6619140 (2003-09-01), Kitahara et al.
patent: 2003/0046996 (2003-03-01), Nakada et al.
patent: 2004/0003659 (2004-01-01), Kato et al.
patent: 2005/0241389 (2005-11-01), Kitahara et al.
patent: 11-23336 (1999-01-01), None
patent: 2005315740 (2005-11-01), None
Office Action dated Sep. 18, 2006 in U.S. Appl. No. 11/108,753.
U.S. Appl. No. 11/108,753, filed Apr. 19, 2005; Client Ref: 83495-US-SHM/cy; Inventors: Noboru Kitahara et al., Claims priority of: JP 2004-133856 filed Apr. 28, 2004.
Chinese Office Action dated Dec. 29, 2006 issued in counterpart Chinese Appln. No. 200510067040.9 with English translation.

Affiliated with

Also associated with

Rating

Air flow rate measuring device having bypass passage does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air flow rate measuring device having bypass passage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air flow rate measuring device having bypass passage will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3822484