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. 05, 1982
Filed:
Jan. 24, 1980
Pierre Cochard, Saint-Vrain, FR;
Bruno de Saint-Marie, Chatenay-Malabry, FR;
Regie Nationale des Usines Renault, Boulogne-Billancourt, FR;
Abstract
A method and apparatus for measuring the rate of recirculation of exhaust gases in an internal combustion engine are disclosed. The rate of recirculation is measured by determining the percentage of carbon gas in the exhaust gas, determining the percentage of carbon gas in the intake gas at a point downstream from the introduction of the recirculated gas and comparing the ratios of carbon gas in the two gases. The gases are drawn off for collection and determination of carbon gas content by a vacuum generator connected to a carbon analyzer and a pressure regulator. A 3-way selection valve is used for drawing off either the exhaust or intake gas.