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公开(公告)号：JPS639619A
公开(公告)日：1988-01-16
申请号：JP4730087
申请日：1987-03-02
Applicant: NIPPON SOKEN , TOYOTA MOTOR CORP
Inventor： KAMIYA SHIGERU , TAKAGI SHIGERU , TOMITA MASAHIRO , OISHI KIYOHIKO , OBATA KIYOSHI
Abstract: PURPOSE:To eliminate exhausted fine particles collected in a filter through effective burning thereof by making exhaust gas to flow through either one of branch exhaust pipes, and heating the filter with a burner provided on the other side of the branch exhaust pipe, in regeneration of a filter. CONSTITUTION:Fine particles in exhaust gas are collected from the full quantity of exhaust gas flowing through filter member 8 by opening the first exhaust pipe 7a by a controller 13 through switching valve 9. A part of exhaust gas is made to recirculate in a suction pipe 3a through EGR pipe 1 and EGR valve 12. On the other hand, when a travel distance and/or a fuel consumption detected with a sensor 17 come to the specified values. Burning is set with a burner 10 facing the first exhaust pipe 7a as well as the second exhaust pipe 7b is opened. Thereby, the filter member 3a can efficiently be heated by the burner 10 at a state where the exhaust gas of low temperature not flowing through the filter member 8, to eliminate fine particles on the filter member 8 by burning.
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公开(公告)号：JPS62210212A
公开(公告)日：1987-09-16
申请号：JP5258286
申请日：1986-03-12
Applicant: TOYOTA MOTOR CORP
Inventor： OBATA KIYOSHI , TAKAMA KENICHIRO , TAKESHIMA SHINICHI
IPC: F01N3/02
Abstract: PURPOSE:To regenerate a filter reliably through simple structure by arranging a gate valves in a path communicating between the upstream and the downstream sides of a filter for catching the particulates in the exhaust gas and in a path communicating between the vicinity of the inlet end section of the filter and an exhaust path. CONSTITUTION:An upstream partition wall 12 and a downstream partition wall 13 are provided in a housing 11 while a filter 16 is inserted between both partition walls 12, 13 and an electrical heater 17 is arranged near the outlet section 16b of the filter 16. A hole 19 is made on the upstream side of the upstream partition wall 12 so as to arrange a first valve 21 while an outlet port 22 formed on the downstream side of the first and second paths 14, 15 is communicated to an exhaust pipe and the donwnstream side of the first path 14 is opened/closed by means of the second valve 23. The first and second valves are closed when the particulates are caught, but they are opened when the filter is regenerated to counter flow the exhaust gas from the outlet side of the filter.
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公开(公告)号：JPS6275012A
公开(公告)日：1987-04-06
申请号：JP21555885
申请日：1985-09-28
Applicant: NIPPON DENSO CO , TOYOTA MOTOR CORP
Inventor： OIBE KAZUO , HOSHIZAKI HIRONORI , KAGEYAMA TERUTAKA , IMAMURA YOSHIHIKO , OBATA KIYOSHI , TAKAMA KENICHIRO , TAKESHIMA SHINICHI
IPC: F01N3/02
Abstract: PURPOSE:To suppress the generation of stress and prevent breakage in a conductive ceramic element heater by conductively fixing one end of said heater to a case while supporting the other end slidably in a thermally expanding direction by means of an insulator and connecting a lead wire to it. CONSTITUTION:An earth electrode 24b is brazed to one end of a conductive ceramic element heater 21 and inserted into an electrode inserting hole 29b provided on a heater case 20 while being fixed to a heater case 20 by means of an insulating cap 35. And, a positive electrode 24a is brazed to the other end of the heater 21 and inserted into an electrode inserting hole 29a, and a lead wire 30 is connected to it while the heater 21 is slidably supported by means of the insulating cap 35. Thereby, the generation of stress can be suppressed and breakage can be prevented in the heater.
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公开(公告)号：JPS6273587A
公开(公告)日：1987-04-04
申请号：JP21280285
申请日：1985-09-26
Applicant: NIPPON DENSO CO , TOYOTA MOTOR CORP
Inventor： HOSHIZAKI HIRONORI , SUZUKI HIROBUMI , OIBE KAZUO , KAWAHARA NOBUAKI , NIWA JUN , KAGEYAMA TERUTAKA , IMAMURA YOSHIHIKO , OBATA KIYOSHI , TAKAMA KENICHIRO , TAKESHIMA SHINICHI
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公开(公告)号：JP2000257417A
公开(公告)日：2000-09-19
申请号：JP5844899
申请日：1999-03-05
Applicant: TOYOTA MOTOR CORP
Inventor： KOBAYASHI MASAAKI , TSUKASAKI YUKIHIRO , ISHIYAMA SHINOBU , TAWARA ATSUSHI , OBATA KIYOSHI , YANAGIHARA HIROMICHI
Abstract: PROBLEM TO BE SOLVED: To prevent hydrocarbons from flowing into the downstream side of NOx occlusion reduction catalyst. SOLUTION: An exhaust emission control converter 10 is placed on an exhaust path 3 of an internal combustion engine 1. The exhaust emission control converter 10 is configured to arrange a NOx occlusion reduction catalyst 7, HC absorbent member 11, oxidation catalyst 13 in this order from the upstream inside a casing. The HC absorbent member 11 selectively absorbs heavy hydrocarbon components among the exhaust air, and when the temperature rises it converts the absorbed heavy hydrocarbons into light hydrocarbons and emits it. When a reductant (fuel) is supplied from a reductant supply device 9 into an exhaust path, at the upstream of the converter 10 at low temperatures, hydrocarbons that did not react on NOx occlusion reduction catalyst 7 flow to the downstream of the catalyst 7. Among those hydrocarbons, heavy components are adsorbed into the HC adsorbent member, while light component is purified further by oxidation catalyst at the downstream side. Hydrocarbons emitted from the HC adsorbent member after the temperature rises are purified by oxidation catalyst on the downstream side, therefore emission of hydrocarbons into the air is prevented completely.
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Patent Agency Ranking
公开(公告)号：JPH1054220A
公开(公告)日：1998-02-24
申请号：JP21138696
申请日：1996-08-09
Applicant: TOYOTA MOTOR CORP
Inventor： WATANABE YOSHIMASA , ARAKI YASUSHI , OBATA KIYOSHI , HENDA YOSHIMITSU
IPC: B01D46/24 , F01N3/02 , F01N3/021 , F01N3/022 , F01N3/023 , F01N3/027 , F01N13/08 , F01N13/10 , F02B3/06 , F02B27/06 , F02D9/04 , F01N7/08 , F01N7/10
Abstract: PROBLEM TO BE SOLVED: To secure a high particulate collecting rate by arranging a particulate collecting filter in each exhaust branch passage for communicating an exhaust collecting part with each cylinder, and communicating the respective exhaust branch passages, positioned on the exhaust upper reaches of each filter, with one another by communicating passages. SOLUTION: In an exhaust manifold 20 composed of an exhaust collecting part 21 and exhaust branched passages 22-25 communicating the exhaust collecting part 21 with each cylinder, particulate collecting filters 42-45 are interposed at upward extended parts of the respective exhaust branched passages 22-25, and adjacent exhaust side exhaust branch passage parts 22a-25a are communicated by communicating passage 32-34. The exhaust pressure of the exhaust branched passage part 22a connected to the cylinder in an exhaust stroke is higher than the exhaust pressure of the other three exhaust branched passage parts 23a-25a, but the exhaust pressure of the respective exhaust branched passage parts 22a-25a are made almost equal by communicating the exhaust branched passage parts 22a-25a with one another so as to impede contraflow of exhaust gas.
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公开(公告)号：JPH08243333A
公开(公告)日：1996-09-24
申请号：JP25086795
申请日：1995-09-28
Applicant: SUMITOMO ELECTRIC INDUSTRIES , TOYOTA MOTOR CORP
Inventor： SAKA TOSHISUKE , IHARA HIROHIKO , NAGAI YOICHI , OBATA KIYOSHI , YANAGIHARA HIROMICHI
IPC: F01N3/02 , B01D39/20 , B01D46/10 , B01D46/24 , B01D53/86 , B01D53/94 , B01J23/86 , B01J35/04 , B01J35/06 , F02B3/06 , B01D53/87
Abstract: PURPOSE: To provide a small-sized, inexpensive particulate trap for a diesel engine satisfying all the characteristics, particulate collecting performance, pressure loss due to the collection, regenerating performance, and durability. CONSTITUTION: Nonwoven fabric of heat resistant metal fiber is used as a filter medium, and metal reducing taper cylindrical filters 2-7 made of the filter medium are concentrically arranged so that the taper directions can be alternately opposite. In the cylindrical filters 2-7, a small diameter side end part of each filter is connected to a large diameter side end part one inside thereof to alternately make clearances between the filters come to a dead end on the inlet and the outlet sides of waste gas. The filter element 1 thus constituted is fitted in a metal container installed in midway of a discharge system to constitute a particulate trap. A metal three-dimensional net-shaped perforated body having air permeability is fitted to the filter medium or on one side or both sides thereof, and a catalyst is deposited on the perforated body, allowing it to be also used as a catalytic converter.
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公开(公告)号：JPH07174018A
公开(公告)日：1995-07-11
申请号：JP27252494
申请日：1994-11-07
Applicant: TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
Inventor： YANAGIHARA HIROMICHI , HIROTA SHINYA , HAYASHI KOTARO , ARAKI YASUSHI , OBATA KIYOSHI , ISHIGURO TOMOOTSU
Abstract: PURPOSE:To prevent a particulate and NOX from being exhausted into the atmosphere. CONSTITUTION:Heaters 18a, 18b and particulate filters 19a, 19b with NOX absorption agent are arranged in a pair of exhaust gas paths 16a, 16b branched from an exhaust pipe. The inlet of either of the exhaust gas paths 16a, 16b is closed by a flow-path selector valve 17. The heaters 18a or 18b in the exhaust path 16a or 16b of which the inlet is closed, is turned on, and secondary air is supplied from secondary air supply ports 24a, 24b to burn a particulate, and then NOX exhausted from the NOX absorption agent is recirculated to an engine.
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公开(公告)号：JPH07150930A
公开(公告)日：1995-06-13
申请号：JP30312193
申请日：1993-12-02
Applicant: NIPPON DENSO CO , TOYOTA MOTOR CORP , TOYODA AUTOMATIC LOOM WORKS
Inventor： MORITA NAOHARU , YASUURA NOBUSHI , YOSHIDA HIDEJI , KATO KEIICHI , TOTANI TAKAYUKI , OBATA KIYOSHI , HAYASHI KOTARO , TANIGUCHI HIROYUKI
Abstract: PURPOSE:To provide a duty controller of an electric motor and an exhaust emission control device of a diesel engine at low cost, capable of driving the electric motor having little rush current. CONSTITUTION:A filter 7 and an electric heater 8 are provided on an exhaust system of a diesel engine 1, and an electrically powered air pump 11 supplies secondary air to the filter 7. An ECU 12 is provided with a microcomputer 13 for outputting a low-frequency duty signal as a driving signal of an electric motor 11a of the electrically powered air pump 11, a high frequency generating circuit 14 for outputting a high-frequency pulse signal, and an AND gate for outputting a signal by taking the logical product of the signal of the high frequency generating circuit 14 and the signal of the microcomputer 13. The microcomputer 13 ignites particulates collected by the filter 7 in an electric heater 8 and also incinerates particulates collected by the filter 7 by driving the electric motor 11a, so as to regenerate the filter.
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公开(公告)号：JPH07102958A
公开(公告)日：1995-04-18
申请号：JP25309493
申请日：1993-10-08
Applicant: TOYOTA MOTOR CORP
Inventor： ARAKI YASUSHI , HIROTA SHINYA , YANAGIHARA HIROMICHI , OBATA KIYOSHI
Abstract: PURPOSE:To provide an exhaust purifying device capable of effectively eliminating NOX in exhaust gas of a lean air-fuel ratio. CONSTITUTION:Exhaust gas and reductant are alternately brought in contact with NOX absorbent supported on the wall face of a passage 16, so that NOX absorption of the NOX absorbent and discharge and reducing purification of the absorbed NOX can be carried out by rotating a rotor 15 equipped with axial direction passages 16, and introducing exhaust gas from one end of the passage 16, and reductant from the other end, respectively.
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