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公开(公告)号：JPH06159037A
公开(公告)日：1994-06-07
申请号：JP9284993
申请日：1993-04-20
Applicant: TOYOTA MOTOR CORP
Inventor： HIROTA SHINYA , ARAKI YASUSHI , OBATA KIYOSHI
Abstract: PURPOSE:To reduce the energy to ignite and burn the collected particulates. CONSTITUTION:A particulate filter 10 is provided to the exhaust gas passage 6 of a diesel engine main body 2. An NOx absorber 26 is held to the particulate filter 10. When the NOx is discharged and reduced, a throttle valve 8 is closed and a fuel is fed from a reducing agent feeding device 12. After the NOx is discharged and reduced, the throttle valve 8 is opened. In this case, the particulates collected to the particulate filter 10 have been heated by the heating in the NOx discharging and reducing time, and they can be ignited easily.
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公开(公告)号：JPH06108828A
公开(公告)日：1994-04-19
申请号：JP26184192
申请日：1992-09-30
Applicant: TOYOTA MOTOR CORP
Inventor： ARAKI YASUSHI , HIROTA SHINYA , OBATA KIYOSHI
Abstract: PURPOSE:To prevent exhaust emission from being deteriorated and eliminate the need for using a large amount of reducing agent. CONSTITUTION:An NOX adsorption/discharge catalyst 10 is arranged at the exhaust passage 6 of a diesel engine body 2. If the NOX adsorption/discharge catalyst 10 is not in an NOX reducing condition, the opening of an intake throttle valve 8 is reduced, and even when theta=0 is formed, fuel supply amount from a fuel supply device 14 is increased, provided that the catalyst is not in the NOX reducing condition. If the catalyst 10 is in the NOX reducing condition, the opening of the intake throttle valve 8 is increased, and then the fuel supply amount form the fuel supply device 14 is increased.
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公开(公告)号：JPH05214924A
公开(公告)日：1993-08-24
申请号：JP29525492
申请日：1992-11-04
Applicant: TOYOTA MOTOR CORP
Inventor： YASUKAWA MASAO , KIMURA KENJI , HAYASHI KOTARO , KAWAHARA KUNIHIRO , ARAKAWA KENJI , OBATA KIYOSHI , OKI MAMORU
Abstract: PURPOSE:To mitigate the engine output fluctuation generated when the exhaust flow is switched at the time of filter regeneration in a dual-filter type exhaust emission control device. CONSTITUTION:An exhaust emission control device is provided with a regenerated combustion gas discharge pipe 20 communicating branch passages in the upstream of filters 2, 3, and opening/closing valves 23, 24 opening or closing the passages. When the particulate collection state is switched to the filter regeneration and when regeneration is switched from the filter 2 to the filter 3, the discharge pipe 20 is temporarily communicated nearly synchronously with the switching action of an exhaust control valve 4 to guide the exhaust gas to both filters 2, 3, and the filter back pressure fluctuation is mitigated when the exhaust control valve 4 is switched.
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公开(公告)号：JPS62182418A
公开(公告)日：1987-08-10
申请号：JP2181886
申请日：1986-02-03
Applicant: NIPPON DENSO CO , TOYOTA MOTOR CORP
Inventor： NIWA JUN , KAGEYAMA TERUTAKA , OIBE KAZUO , HOSHIZAKI HIRONORI , SUZUKI HIROBUMI , IMAMURA YOSHIHIKO , OBATA KIYOSHI , TAKAMA KENICHIRO , TAKESHIMA SHINICHI
IPC: F01N3/02
Abstract: PURPOSE:To prevent any crack in a ceramic heater due to oxidation of a bonding material from occurring, by attaching a holding electrode to a tip of the electrode inserted into a through hole of ceramic heater, and installing a bank part for the bonding material between the holding electrode and the electrode. CONSTITUTION:A through hole 12 is installed in a ceramic heater 11, while a holding electrode 16 is connected to a tip of an electrode 14 being inserted into this through hole 12, and the ceramic heater 11 is held between a flange 15 of an electrode body 13 and the holding electrode 16. And, a bonding material bank part 20 is installed in a circumferential part coming into contact with the electrode 14 of the holding electrode 16. A bonding material layer 17 is interposed between the flange 15, the holding electrode 16 and the ceramic heater 11. With this constitution, since a superfluous bonding material being extruded at the time of joining is stored in the bond part, the bonding material is not filled up inside the through hole, any crack in the ceramic heater due to oxidation of the bonding material is preventable from occurring.
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公开(公告)号：JPS6275013A
公开(公告)日：1987-04-06
申请号：JP21555985
申请日：1985-09-28
Applicant: NIPPON DENSO CO , TOYOTA MOTOR CORP
Inventor： OIBE KAZUO , SUZUKI HIROBUMI , KAGEYAMA TERUTAKA , IMAMURA YOSHIHIKO , OBATA KIYOSHI , TAKAMA KENICHIRO , TAKESHIMA SHINICHI
IPC: F01N3/02
Abstract: PURPOSE:To prevent stress from concentrating and a crack from generating on a ceramic insulating ring by holding a conductive ceramic element heater and said ring between the projected part of a heater case and a screw cap. CONSTITUTION:A conductive ceramic element heater 21 is placed on the upper course side of the filter 2 of an exhaust fine particle collecting and cleaning device. A projected part 26 is provided on a heater case 20, the heater 21 is place on it, and a ceramic insulating ring 23 is overlapped on the heater 21 and clamped by a screw cap 22 from above. Thereby, the insulating ring 23 is pressed and held by nearly a uniform pressure over its whole surface, preventing stress concentration and the generation of a crack.
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Patent Agency Ranking
公开(公告)号：JPS59190418A
公开(公告)日：1984-10-29
申请号：JP6373683
申请日：1983-04-13
Applicant: Toyota Motor Corp
Inventor： OBATA KIYOSHI , TAKAMA KENICHIROU
CPC classification number: F01N3/027
Abstract: PURPOSE:To obtain a solid-particle collector having the stable ignition performance by forming the almost all the part which extend between the insulative supporting members of a heater element so as to be deformed towards a filter side in comparison with the parts supported by insulative supporting members. CONSTITUTION:A heater element 30 is constituted of a nichrome wire and curved toward a filter 22 through pressing on the side. Therefore, the intermediate part between supporting members 32 and 34 out of the heater element 30 projects to the filter side in comparison with the side parts 48 and 50 inserted into the grooves 44 and 46 of the supporting members 32 and 34 respectively. As heat is generated through electric conduction, the heater element thermally expands only on the filter side, and the intermediate part 42 approaches to or is closely attached onto the edge surface of the filter 22. Therefore, the collected solid particles can be ignited certainly and stably, when the filter is regenerated.
Abstract translation: 目的：为了获得具有稳定点火性能的固体颗粒捕集器，通过在与绝缘支撑件支撑的部分相比较下形成几乎全部加热元件的绝缘支撑件之间的部分，以朝向过滤器侧变形 成员。 构成：加热器元件30由镍铬合金线构成，并通过在侧面上压制而朝向过滤器22弯曲。 因此，与分别插入支撑构件32和34的槽44和46中的侧部48和50相比，加热元件30之间的支撑构件32和34之间的中间部分突出到过滤器侧。 当通过导电产生热量时，加热器元件仅在过滤器侧热膨胀，并且中间部分42接近或紧密地附着在过滤器22的边缘表面上。因此，收集的固体颗粒可以被肯定点燃， 稳定地，当过滤器再生时。
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27.发明专利
公开(公告)号：JPS59150921A
公开(公告)日：1984-08-29
申请号：JP2290383
申请日：1983-02-16
Applicant: Toyota Motor Corp
Inventor： OOISHI KIYOHIKO , OBATA KIYOSHI , TAKAMA KENICHIROU
CPC classification number: F01N9/002 , F01N3/023 , F01N3/025 , F01N2430/06 , Y02T10/47
Abstract: PURPOSE:To provide a trap regenerating device capable of performing sufficient combustion of fine exhaust gas particles by a method wherein a throttling of intake gas is performed in a high speed range of engine and either a secondary fuel injection or both of a secondary fuel injection and a throttling of intake is performed. CONSTITUTION:When a computer 9 judges that the engine is at a high speed range in reference to signals from a load sensor 17 and a rotation sensor 18, the instruction is transmitted to the load change-over valves 6 and 7 to close an intake throttle valve 3 until it shows a desired pressure of an intake pressure sensor 20. When the computer 9 judges that the engine is at a low or medium speed range, fuel is secondary injected into cylinders of intial exhaust stroke through the change-over valves under instruction for the computer to increase temperature in a trap 10 and to combust the exhaust fine particles. When a sensor 11 for exhaust gas temperature detects that a rate of increased temperature is insufficient in the trap 10, the computer 9 produces an instruction to close the intake throttle valve 3.
Abstract translation: 目的：提供一种能够通过以下方法执行精细废气颗粒的充分燃烧的捕集器再生装置，其中在发动机的高速范围内执行进气的节流，以及二次燃料喷射或二次燃料喷射和 进行节流。 构成：当计算机9根据来自负载传感器17和旋转传感器18的信号判定发动机处于高速范围时，指令被传送到负载转换阀6和7以关闭进气节气门 阀3，直到其显示进气压力传感器20的所需压力。当计算机9判断发动机处于低速或中速范围时，通过指令下的转换阀将燃料二次喷射到初始排气冲程的气缸中 用于使计算机增加捕集器10中的温度并使废气细颗粒燃烧。 当用于排气温度的传感器11检测到在收集器10中温度升高的速度不足时，计算机9产生关闭进气节气门3的指令。
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公开(公告)号：JPH1033923A
公开(公告)日：1998-02-10
申请号：JP19462696
申请日：1996-07-24
Applicant: TOYOTA MOTOR CORP
Inventor： WATANABE YOSHIMASA , HENDA YOSHIMITSU , OBATA KIYOSHI , ARAKI YASUSHI
Abstract: PROBLEM TO BE SOLVED: To easily remove ashes without damaging a filter by sticking ceramic particles on the surface of the filter consisting of a particulate filter arranged in an engine exhaust system through an organic binder or a metallic binder. SOLUTION: A filter 1 for collecting particulates is arranged in the exhaust passage 10 of a Diesel engine and also a feeder 2 of ceramic particles is connected to the exhaust passage 10 through a control valve 2a on the exhaust upstream side of the filter 1. Ceramic particles are stuck in a layer shape on the surface of a porous partition 1a of the filter 1 through an organic binder or a metallic binder. In the case of forming the layer 3 of ceramic particles, the organic binder or the metallic binder is applied to the surface of the filter and the control valve 2a of the feeder 2 is opened and ceramic particles together with air flow are passed through the filter and ceramic particles are stuck on the surface of the filter. The particulate filter is formed by burning the filter.
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公开(公告)号：JPH09268910A
公开(公告)日：1997-10-14
申请号：JP12162696
申请日：1996-05-16
Applicant: TOYOTA MOTOR CORP
Inventor： ARAKI YASUSHI , WATANABE YOSHIMASA , HENDA YOSHIMITSU , OBATA KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To surely remote ash from a filter when a filter is regenerated by arranging filters for collecting particulate in exhaust ports for communicating an exhaust muffler part and each cylinder with each other, and comparatively increasing a resistance in an exhaust passage positioned on an exhaust downstream side from the exhaust muffler part. SOLUTION: The exhaust manifold in a four cylinder diesel engine consists of an exhaust collecting part 21 and four exhaust ports 22 to 25, and filters for collecting particulate are arranged upward respective exhaust ports 22 to 25. A catalyst, a muffler, and the like are arranged in the exhaust passage positioned on the downstream side from the part 21, and much large passage resistance is formed in the whole of the exhaust passage. As a result, in the exhaust stroke of one cylinder, pressure in a diesel engine side part is reduced more than pressure of the part 21, back flow of exhaust gas is generated in the filter of the other cylinder, and ash is peeled off and removed from the filter.
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公开(公告)号：JPH07279718A
公开(公告)日：1995-10-27
申请号：JP7347294
申请日：1994-04-12
Applicant: TOYOTA MOTOR CORP
Inventor： HIROTA SHINYA , ARAKI YASUSHI , OBATA KIYOSHI
IPC: F02B75/10 , F01N3/08 , F01N3/24 , F02B3/06 , F02B23/00 , F02D41/02 , F02D41/14 , F02D41/38 , F02D43/00 , F02D45/00 , F02M25/07
Abstract: PURPOSE:To suppress variation of an engine output torque when a mean air-fuel ratio in a combustion chamber is changed over from a lean condition to a rich condition so as to discharge NOx from an NOx absorber. CONSTITUTION:An NOx absorber 16 is arranged inside an exhaust passage of an engine. The NOx abserber 16 normally absorbs NOx, and releases it when a mean air-fuel ratio in a combustion chamber 3 is in a rich condition. An intake amount is reduced by opening an EGR control valve 21, or closing an intake control valve 12 when NOx is discharged from the NOx abserber 16. A fuel injection amount is increased at this time so as not to vary an engine output torque.
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