Title:
CATALYTIC CONVERTER
Document Type and Number:
Japanese Patent JPS6318123
Kind Code:
A
Abstract:
PURPOSE:To suppress a laminar flow of exhaust gas in an upstream section of a catalytic converter having a plurality of monolith catalysts arranged in series, and effectively utilize the whole of the catalysts, by making a cell size of the upstream catalyst greater then that of the downstream catalyst. CONSTITUTION:A catalytic converter 21 comprises a substantially cylindrical converter case 22 and two monolith catalysts 23 and 24 arranged in series in the case 22 with cavities defined between axial ends of the catalysts. The converter case 22 includes a turbulence generating changer 28 defined at a central portion of a cylindrical shell 25 and upstream and downsteam catalyst chambers 29 and 30 defined on the upstream and downstream sides of the turbulence generating chamber 28. The catalysts 23 and 24 have a structure such that they are partitioned like a grid to define cells 31 and 32 which form axially extending exhaust gas passages. Each cell 31 of the upstream monolith catalyst 23 has a size greater than that of each cell 32 of the downstream monolith catalyst 24. Accordingly, a laminar flow of exhaust gas in the upstream section of the catalytic converter may be suppressed to maintain a turbulent condition of the exhaust gas, thereby improving the emission control.
Inventors:
OKA TOSHIAKI
Application Number:
JP16395086A
Publication Date:
January 26, 1988
Filing Date:
July 10, 1986
Export Citation:
Assignee:
FUJI HEAVY IND LTD
International Classes:
F01N3/28; F01N13/02; (IPC1-7): F01N3/28
Attorney, Agent or Firm:
Susumu Ito