Patent · US Expired

Method and apparatus for determining the non-volatile component of aerosol particles in a gas sample

US6972841B2 · kind B2 · utility

10Cited by

5References

22Claims

0Family size

Assignee

AVL LIST GMBH · AT

Inventors

Peter W. Krempl · Leibnitz, AT
Christian Reiter · Sarstedt, DE
Wolfgang Schindler · Graz, AT
Wolfgang Singer · Aalen, DE

Key dates

Filing date	Nov 25, 2002
Grant date	Dec 6, 2005
Priority date	—
Expiry date	Sep 14, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/0422
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a method for determining the non-volatile component of aerosol particles in a gas sample, especially in the exhaust gas of internal combustion engines, where the aerosol particles are deposited on an oscillating sensor (2) of at least one crystal microbalance (3), and the change in at least one oscillation parameter of the oscillating sensor is employed as measurement variable. According to the invention the oscillating sensor (2) of at least one crystal microbalance (3) is maintained at a temperature of more than 200° C. during deposition of the aerosol particles, and preferably between 250° C. and 350° C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.