Methods and systems for controlling flow of a diluted sample and

Details Methods and systems for controlling flow of a diluted sample and Methods and systems for controlling flow of a diluted sample and

1997-04-01

1998-12-08

Ludlow, Jan

Chemistry: analytical and immunological testing

Condition responsive control

73 2321, 73 2331, 73 2901, 73 3103, 7386303, 422 62, 422 83, 422 94, 436 39, 436 52, 436116, 436122, 436134, 436155, 436158, 436160, 436179, 436181, G01N 3510

Patent

active

058468315

ABSTRACT:
In a first embodiment of the present invention, a control method and system are provided in an exhaust emission sampling system for controlling a flow controller in order to compensate for the effects of changing water vapor content in a diluted sample having a predetermined dilution ratio. A water measuring device such as a relative humidity sensor generates a water vapor signal based on the amount of water vapor in the diluted sample. The water vapor signal is then processed within a control unit to obtain a value for the amount of water in the diluted sample. A control signal is generated by the control unit based on the amount of water vapor, flow rate of the exhaust emissions, and also, on the type of fuel used in the combustion process to control the flow controller which is, preferably, a mass flow controller.

REFERENCES:
patent: 3144769 (1964-08-01), Francisco, Jr.
patent: 3407646 (1968-10-01), Traver
patent: 3593023 (1971-07-01), Dodson
patent: 3603155 (1971-09-01), Morris
patent: 3699814 (1972-10-01), Kaufman
patent: 3784902 (1974-01-01), Huber
patent: 3817100 (1974-06-01), Anderson et al.
patent: 3895915 (1975-07-01), Haldeman
patent: 3965749 (1976-06-01), Hadden et al.
patent: 3986386 (1976-10-01), Beltzer et al.
patent: 4226675 (1980-10-01), Lewis et al.
patent: 4254797 (1981-03-01), Mayeaux
patent: 4351181 (1982-09-01), Currans
patent: 4379402 (1983-04-01), Harman, III
patent: 4498496 (1985-02-01), Barcellona et al.
patent: 4555930 (1985-12-01), Leach et al.
patent: 4555931 (1985-12-01), Amimoto et al.
patent: 4586367 (1986-05-01), Lewis
patent: 4660408 (1987-04-01), Lewis
patent: 4823591 (1989-04-01), Lewis
patent: 4852384 (1989-08-01), Woolbert et al.
patent: 4977776 (1990-12-01), Shindo et al.
patent: 5129257 (1992-07-01), Caduner et al.
patent: 5157957 (1992-10-01), Mettes et al.
patent: 5184501 (1993-02-01), Lewis et al.
patent: 5217692 (1993-06-01), Rump et al.
patent: 5267467 (1993-12-01), Caron
patent: 5279146 (1994-01-01), Asano et al.
patent: 5337595 (1994-08-01), Lewis
patent: 5410907 (1995-05-01), Strom et al.
patent: 5469731 (1995-11-01), Decker et al.
patent: 5485754 (1996-01-01), Harpster

Affiliated with

Also associated with

Rating

Methods and systems for controlling flow of a diluted sample 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 Methods and systems for controlling flow of a diluted sample and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for controlling flow of a diluted sample and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-176646