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:
Dec. 10, 1996
Filed:
Apr. 28, 1994
Mallanagouda D Patil, Corning, NY (US);
Jimmie L Williams, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A engine exhaust system is disclosed for reducing the amount of hydrocarbons emitted during engine start-up (cold-start), before the catalytic converter has attained its effective operating temperature. The system includes a flow control device, in particular a bi-metallic flap, occupying a first position at the first temperature to direct substantially all of the engine exhaust through a molecular sieve structure to adsorb the hydrocarbons, and a second position at the second temperature, to direct the engine exhaust stream directly from the light-off catalyst to the burnoff catalyst, bypassing the molecular sieve structure.