Title:
LEAK DETECTION METHOD FOR OPEN EMISSION ANALYSIS, AND OPEN EMISSION ANALYSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/154687
Kind Code:
A1
Abstract:
[Provide] To simply and reliably detect exhaust gas leaks when carrying out an open emission analysis of exhaust gas. [Solution] An exhaust gas discharged from a discharge port 7a is taken into the interior of an exhaust gas collection unit 10 together with outside air from the surroundings. A leak detection mechanism 50 for detecting an exhaust gas leaking out from a collection port 11 is provided. The leak detection mechanism 50 is equipped with: a temperature sensor, which is a pair comprising an outer temperature sensor 51 and an inner temperature sensor 52; and a temperature measurement unit 55 that measures the temperature difference between the inner and outer temperatures detected by the temperature sensor. A plurality of the inner/outer paired temperature sensors are disposed at regular intervals in the circumferential direction of the collection port 11. When a leak occurs, the temperature at the inner temperature sensor 52 rises and the temperature difference with the outer temperature sensor 51 increases, and thus the leak is detected by detecting said temperature difference via the temperature measurement unit 55. If the leak occurs in a portion of the peripheral direction, only the temperature difference of the section where the leak is occurring increases, and so the location of the leak is identified.
Inventors:
FUJII SATOSHI (JP)
OKONOGI TAKUMA (JP)
NIHEI HIDEO (JP)
OKONOGI TAKUMA (JP)
NIHEI HIDEO (JP)
Application Number:
PCT/JP2017/008019
Publication Date:
September 14, 2017
Filing Date:
February 28, 2017
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
G01N1/00; F01N3/00; G01M15/10; G01N1/22; G01M3/02
Foreign References:
| JP2014224784A | 2014-12-04 | |||
| JPS56164949A | 1981-12-18 | |||
| JPS596748U | 1984-01-17 |
Other References:
See also references of EP 3428607A4
Attorney, Agent or Firm:
KOMATSU Kiyomitsu (JP)
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