Exhaust gas purifier for internal combustion engine
AssigneesToyota Jidosha Kogyo Kabushiki Kaisha, Tsuchiya Co., Ltd.
InventorsRyoichi Okano, Tsuchio Bunda, Shinichiro Mizusawa, Akiyoshi Morita
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Abstract
An exhaust gas purifier for internal combustion engine, has a porous filter impregnated with a desired adsorbent or a porous filter made of bulk metal catalyst. Instead of extending perpendicular to the main axial direction of the exhaust pipe, the filter extends axially and is mounted on a metal screen cylinder having a baffle which diverts the flow of exhaust gas toward and through the cylinder and filter. In this manner, the exhaust gas flows axially into the screen cylinder and then passes radially through the filter to a second flow passage which is connected to the purifier outlet. Very low back pressure is obtained with this arrangement.
Claims6
An exhaust gas purifier comprising, a casing, at least one porous tube surrounded by porous filter means within the casing, said porous tube having an interior and an exterior, said tube and casing having a gas flow space between said casing and the exterior of said tube;
- gas inlet means at one end of the casing for directing gas into the interior of said porous tube, and gas outlet means at the other end of the casing for receiving gas from said gas flow space;
- baffle means in said tube for mixing gas from said inlet and for diverting gas through said porous tube and into the gas flow space, said baffle means comprising, a series of flat plates each twisted at least 180.degree. between end edges thereof and aligned with the porous tube, end edges of adjacent plates being at right angles to each other so that the mixing action of the plates is enhanced.
Dependencies are inferred from the claim text.