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:
Jun. 20, 2006
Filed:
Dec. 13, 2001
Tetsuo Endo, Wako, JP;
Haruhiko Shimizu, Wako, JP;
Go Motohashi, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An internal combustion engine HC-adsorbent is located in one of a pair of exhaust passages in parallel to each other downstream of an emission control catalyst for purifying an exhaust gas and through which exhaust gas flows selectively by a switchover valve. The adsorbent is a zeolite mixture having pores at least 3.5 Å and smaller than 6 Å and not equal or larger than 6 Å and smaller than 7 Å, and zeolite having pores at least 7 Å and smaller than 10 Å and not equal or larger than 6 Å and smaller than 7 Å. HCs are desorbed quickly and easily lowering the desorption temperature, while ensuring excellent adsorbing performance for HCs of different molecular diameters. Even when a vehicle travels only a short duration after engine starting, desorption advances quickly and reliably, the adsorbent exhibiting intended adsorbing performance at the next engine starting.