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1. WO1998013680 - EXHAUST GAS MEASURING INSTRUMENT

Publication Number WO/1998/013680
Publication Date 02.04.1998
International Application No. PCT/JP1997/003289
International Filing Date 18.09.1997
Chapter 2 Demand Filed 03.03.1998
IPC
G01F 1/36 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
34by measuring pressure or differential pressure
36the pressure or differential pressure being created by the use of flow constriction
G01F 1/38 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
34by measuring pressure or differential pressure
36the pressure or differential pressure being created by the use of flow constriction
38the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
G01F 5/00 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
5Measuring a proportion of the volume flow
G01N 1/22 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
1Sampling; Preparing specimens for investigation
02Devices for withdrawing samples
22in the gaseous state
G01N 33/00 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
CPC
G01F 1/363
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
34by measuring pressure or differential pressure
36the pressure or differential pressure being created by the use of flow constriction
363with electrical or electro-mechanical indication
G01F 1/383
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
34by measuring pressure or differential pressure
36the pressure or differential pressure being created by the use of flow constriction
38the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
383with electrical or electro-mechanical indication
G01F 5/00
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
5Measuring a proportion of the volume flow
G01N 1/2252
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
1Sampling; Preparing specimens for investigation
02Devices for withdrawing samples
22in the gaseous state
2247Sampling from a flowing stream of gas
2252in a vehicle exhaust
G01N 2001/2264
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
1Sampling; Preparing specimens for investigation
02Devices for withdrawing samples
22in the gaseous state
2247Sampling from a flowing stream of gas
2264with dilution
G01N 33/0006
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
0004Gaseous mixtures, e.g. polluted air
0006Calibrating gas analysers
Applicants
  • HINO JIDOSHA KOGYO KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • ICHIKAWA, Jun [JP]/[JP] (UsOnly)
Inventors
  • ICHIKAWA, Jun
Agents
  • SHAMOTO, Ichio
Priority Data
8/27711127.09.1996JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) EXHAUST GAS MEASURING INSTRUMENT
(FR) INSTRUMENT DE MESURE DES GAZ D'ECHAPPEMENT
Abstract
(EN)
An exhaust gas measuring instrument has a miniature dilution tunnel (22) in which a part of exhaust gas in the exhaust pipe (15) of an engine is introduced through an extraction pipe (30) and diluted with air, a measuring means (33 and 36) which measures specific components in the exhaust gas diluted in the miniature dilution tunnel (22), a high response differential pressure type extracted gas flow meter (31 and 40) which measures the exhaust gas flow rate (Qs) in the extraction pipe (30), a high response differential pressure type bypassed gas flow meter (29 and 39) which measures the exhaust gas flow rate (Qb) in the exhaust pipe (15) and an arithmetic means (44) which calculates the flow rate dividing ratio R = Qb/Qs which is obtained by dividing the exhaust gas flow rate (Qb) by the exhaust gas flow rate (Qs). The exhaust gas measuring instrument further has a means by which the calibration coefficient (k) of the flow rate dividing ratio is obtained and a means which obtains the calibrated flow rate dividing ratio (k.R) by multiplying the flow rate dividing ratio by the calibration coefficient. The calibration coefficient (k) can be obtained by dividing a concentration dividing ratio (Rc) by the flow rate dividing ratio (R).
(FR)
Cet instrument de mesure des gaz d'échappement comprend un tunnel de dilution miniature (22), dans lequel une partie des gaz d'échappement se trouvant dans la tubulure d'échappement (15) d'un moteur est introduite par un tuyau d'extraction (30) et diluée avec de l'air, un organe de mesure (33 et 36) qui mesure les constituants spécifiques des gaz d'échappement dilués dans le tunnel de dilution miniature (22), un débitmètre de gaz extraits du type à pression différentielle et à réponse rapide (31 et 40), qui mesure le débit (Qs) des gaz d'échappement dans le tube d'extraction (30), un débitmètre de gaz dérivés du type à pression différentielle et à réponse rapide (29 et 30), qui mesure le débit (Qb) des gaz d'échappement dans la tubulure d'échappement (15), et un organe arithmétique (44), qui calcule le rapport de division des débits R = Qb/Qs, que l'on obtient en divisant le débit (Qb) par le débit (Qs) des gaz d'échappement. Cet instrument de mesure des gaz d'échappement comprend en outre un organe au moyen duquel on obtient le coefficient d'étalonnage (k) du rapport de division des débits, ainsi qu'un moyen qui permet d'obtenir le rapport de division des débits étalonné (k.R), en multipliant le rapport de division des débits par le coefficient d'étalonnage. On peut obtenir ce coefficient d'étalonnage (k) en divisant un rapport de division de concentrations (Rc) par le rapport de division des débits (R).
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