Title:
真空ポンプの始動時における粒子カウンタでの圧力パルスの低減を可能にするバルブを有する固体粒子計数システム
Document Type and Number:
Japanese Patent JP5005768
Kind Code:
B2
Abstract:
A solid particle counting system for measuring solid particle number concentrations from engine or vehicle exhausts in real-time includes a diluter arrangement, a particle counter, and a flow splitter. The diluter arrangement mixes the dilution gas with flowing sample gases. The flow splitter receives the output flow from the diluter arrangement, provides a portion of this flow to the particle counter, and provides a by-pass flow that is received by a vacuum pump. A second flow route to the particle counter includes a valve arranged such that opening the valve during the starting of the vacuum pump reduces a pressure pulse at the particle counter caused by the starting of the vacuum pump, thereby avoiding work fluid backflow from the particle counter prior to the vacuum pump stabilizing.
Inventors:
Wei Chang
Porter scott tea
Ichiro Asano
Rahman Montager Md
Takeshi Kusaka
Porter scott tea
Ichiro Asano
Rahman Montager Md
Takeshi Kusaka
Application Number:
JP2009543163A
Publication Date:
August 22, 2012
Filing Date:
December 19, 2007
Export Citation:
Assignee:
HORIBA, Ltd.
International Classes:
G01N15/06; G01N15/00
Domestic Patent References:
| JP2005514588A | ||||
| JP11014516A | ||||
| JP11508368A | ||||
| JP2003521688A | ||||
| JP4072542A | ||||
| JP6500621A | ||||
| JP2002515600A | ||||
| JP2004512503A |
Attorney, Agent or Firm:
Ryuhei Nishimura
Akiko Sato
Saito Shindai
Akiko Sato
Saito Shindai