The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
Dec. 21, 2006
Qiang Wei, Novi, MI (US);
Scott T. Porter, Ann Arbor, MI (US);
Ichiro Asano, Konan, JP;
Montajir M D. Rahman, Otsu, JP;
Takeshi Kusaka, Otsu, JP;
Qiang Wei, Novi, MI (US);
Scott T. Porter, Ann Arbor, MI (US);
Ichiro Asano, Konan, JP;
Montajir M D. Rahman, Otsu, JP;
Takeshi Kusaka, Otsu, JP;
Horiba Ltd., Kyoto, JP;
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.