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. 07, 1997
Filed:
Sep. 13, 1995
Kenji Hirai, Kameoka, JP;
Akira Aono, Kyoto, JP;
Shinya Tsuneda, Kyoto, JP;
Hirokazu Matsumoto, Otsu, JP;
Yuji Yamashita, Suita, JP;
Hisayoshi Tanaka, Kyoto, JP;
Takanori Shiina, Utsunomiya, JP;
Haruko Kaburagi, Utsunomiya, JP;
Shimadzu Corporation, Kyoto, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic exhaust gas analyzer for analyzing an exhaust gas of an internal combustion engine. The analyzer includes: a) plural analyzing units; b) two independent gas lines provided in each of the plural analyzing units; c) a gas-chromatographic column provided in each of the gas lines; d) a gas-chromatographic detector connected with the column in each of the gas lines; and e) a signal communication network interconnecting the gas-chromatographic detectors. Exhaust gas and the background gas are sampled at each stage of a predetermined run cycle, and are provided immediately to the two independent gas lines of the plurality of analyzing units respectively. Then the exhaust gas and background gas are analyzed in parallel in each of the plurality of analyzing units, which facilitates equalizing the measurement conditions of the two gases and the background correction of the measurement results of the exhaust gas can be made at high precision.