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公开(公告)号：JP2005155500A
公开(公告)日：2005-06-16
申请号：JP2003396166
申请日：2003-11-26
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： TOMITA TETSUJI , SUGIYAMA TATSUMASA , TAWARA ATSUSHI
IPC: F02M25/07 , F01N3/02 , F01N3/023 , F01N3/24 , F02D9/02 , F02D21/08 , F02D35/00 , F02D41/00 , F02D41/02 , F02D41/12 , F02D45/00
CPC classification number: F01N9/002 , F01N13/009 , F01N13/0093 , F01N13/0097 , F02B29/0406 , F02B37/00 , F02D35/0023 , F02D41/029 , F02D2041/0017 , F02D2200/0802 , F02D2200/0812 , F02M26/05 , F02M26/23 , F02M26/35 , Y02T10/47
Abstract: PROBLEM TO BE SOLVED: To suppress impairment of the exhaust gas control function of exhaust gas controlling catalyst by excessive rise of the catalyst temperature even when the engine speed of an internal combustion engine is reduced in a state of much deposition of particulate matters while recycling the catalyst. SOLUTION: An exhaust gas control apparatus includes a second catalyst converter 35 having an exhaust gas control function in an exhaust passage 14 in an engine 10. The second catalyst converter 35 is recovered by burning and removing particulate matters deposited in the second catalyst converter 35. In the exhaust gas control apparatus, when the engine 10 (a vehicle) is decelerated while an amount of the deposited particulate matters is large during recovery of the catalyst, an increase in the amount of intake air in a combustion chamber 13 over the small amount of the deposited particulate matters is suppressed by operating an intake throttle valve 18 to the closing side or the like. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：为了抑制排气控制催化剂的排气控制功能的损害，即使当内燃机的发动机转速在颗粒物沉积的情况下减少时，催化剂温度过高 同时回收催化剂。 解决方案：排气控制装置包括在发动机10中的排气通道14中具有排气控制功能的第二催化剂转化器35.通过燃烧和除去沉积在第二催化剂中的颗粒物质来回收第二催化剂转化器35 在废气控制装置中，当在催化剂回收期间发动机10（车辆）减速而沉积的颗粒物质的量大时，燃烧室13中的进气量增加 通过将进气节流阀18操作到关闭侧等来抑制少量沉积的颗粒物质。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JP2004346787A
公开(公告)日：2004-12-09
申请号：JP2003143121
申请日：2003-05-21
Applicant: Toyota Industries Corp , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田自動織機
Inventor： SUGIYAMA TATSUMASA , TSUZUKI MASAHITO , ISHIKAWA MASAHIKO , KOBAYASHI NOBUKI , TAWARA ATSUSHI , KATO HIDENAGA
IPC: F02M25/07 , F02D21/08 , F02D41/00 , F02D41/04 , F02D41/06 , F02D41/14 , F02D41/24 , F02D41/30 , F02D41/38 , F02D41/40 , F02D43/00
CPC classification number: F02B29/0406 , F02D41/0007 , F02D41/064 , F02D41/1441 , F02D41/1446 , F02D41/187 , F02D41/2422 , F02D41/3035 , F02D41/3827 , F02D2200/0406 , F02D2200/0602 , F02D2250/38 , F02M26/05 , F02M26/23 , F02M26/47 , Y02T10/146
Abstract: PROBLEM TO BE SOLVED: To provide technology capable of controlling emission of smoke and providing acceleration matching with driver's demand in an internal combustion engine selectively switching between a low temperature combustion condition and a normal combustion condition. SOLUTION: In the internal combustion engine selectively switching between the low temperature combustion condition and the normal combustion condition, MAP for calculating the maximum fuel injection quantity that is an upper limit value of quantity of fuel that can be injected into a combustion chamber is separately provided as a MAP for low temperature combustion and a MAP for normal combustion respectively (S103, S104). COPYRIGHT: (C)2005,JPO&NCIPI
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公开(公告)号：JP2004257319A
公开(公告)日：2004-09-16
申请号：JP2003049486
申请日：2003-02-26
Applicant: TOYOTA MOTOR CORP
Inventor： ISHIKAWA MASAHIKO , TSUZUKI MASAHITO , SUGIYAMA TATSUMASA , KOBAYASHI NOBUKI , TAWARA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To properly remove HC in an exhaust gas recirculating gas while the temperature rise of the exhaust gas recirculating gas is suppressed in an oxidization catalyst. SOLUTION: An engine intake passage and an engine exhaust passage are connected to each other by an EGR passage, and the oxidization catalyst is disposed in the EGR passage. The platinum carrying amount Q (Pt) of the oxidization catalyst is set so that the CO removal rate PR (CO) of the oxidization catalyst does not exceed an allowable upper limit value UL and the HC removal rate PR (HC) is not lower than an allowable lower limit value LL. The allowable upper limit value UL is preferably substantially 10%, and the allowable lower limit value LL is preferably substantially 40%. COPYRIGHT: (C)2004,JPO&NCIPI
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公开(公告)号：JP2004144072A
公开(公告)日：2004-05-20
申请号：JP2003065370
申请日：2003-03-11
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： ISHIKAWA MASAHIKO , TSUZUKI MASAHITO , SUGIYAMA TATSUMASA , KOBAYASHI NOBUKI , TAWARA ATSUSHI , NAKATANI KOICHIRO
Abstract: PROBLEM TO BE SOLVED: To reduce the volume of sulfate emitted into the atmosphere. SOLUTION: A particulate filter is arranged in the exhaust passage of an internal combustion engine where the air-fuel ratio of air fuel mixture burnt in a combustion chamber is kept lean, and an NOx catalyst is supported on a particulate filter. If engine back pressure P representing the volume of fine particles accumulated on the particulate filter becomes higher than a first threshold P1, the temperature of the particulate filter is increased to a targeted temperature TPM, and the oxidation of the fine particles is performed to hold them at the targeted temperature TPM for a targeted time tPM, while keeping lean the air-fuel ratio of exhaust gas flowing into the particulate filter. The volume of SOx that has been accumulated in the NOx catalyst without forming sulfate is determined. When the volume of SOx that has been accumulated in the NOx catalyst without forming sulfate is large, the targeted temperature TPM is made to be lower, whereas the targeted time tPM is made to be longer compared to that when it is small. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2003148142A
公开(公告)日：2003-05-21
申请号：JP2001341585
申请日：2001-11-07
Applicant: TOYOTA MOTOR CORP
Inventor： TAWARA ATSUSHI , MATSUOKA HIROKI , SUGIYAMA TATSUMASA , OTSUBO YASUHIKO , AOYAMA TARO , ITO TAKEKAZU
Abstract: PROBLEM TO BE SOLVED: To provide a technique for eliminating a difference between the quantity of a reducing agent required for reducing NOX occluded in a NOX occlusion agent and that of a reducing agent actually supplied, whereby precisely controlling an air-fuel ratio at the time of reducing NOX. SOLUTION: This device comprises a NOX occlusion agent 20; a driving condition detecting means 33; a target temperature rise amount deciding means 35 for deciding the temperature rise amount of the NOX occlusion agent 20; a reducing agent supply means 28; a temperature rise means 28 for rising the temperature of the NOX occlusion agent 20 by supplying the reducing agent; a temperature rise amount estimation means 24 for estimating the actual temperature rise amount of the NOX occlusion agent; a correction coefficient calculation means 35 for calculating the ratio of the target temperature rise amount and the estimated temperature rise amount; and a reducing agent supply quantity correction means 35 for correcting the quantity of the reducing agent based on the value calculated by the correction coefficient calculation means 35.
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Patent Agency Ranking
公开(公告)号：JP2002242780A
公开(公告)日：2002-08-28
申请号：JP2001040545
申请日：2001-02-16
Applicant: TOYOTA MOTOR CORP
Inventor： MURAKAMI GENICHI , TAWARA ATSUSHI , MATSUSHITA SOICHI
Abstract: PROBLEM TO BE SOLVED: To attain both an improvement in mounting property and economic property and the ensuring of functional reliability in a fuel supply unit for an internal combustion engine having the function of additively supplying fuel as a reducing agent to a reduction catalyst provided on an exhaust system of the internal combustion engine and the function of accumulating the pressurized fuel once and injecting and supplying it to each cylinder. SOLUTION: In this fuel supply unit 10 for supplying each cylinder of the engine 100 and an exhaust passage 101, a device structure for arranging a control valve structure (suction shut-off valve) 80 containing a linear solenoid in a branch point branching a passage P2 for fuel sucked to a feed pump 30 to a fuel passage P3 directed to a fuel addition valve 40 and a fuel passage P4 directed to a high-pressure pump 50 is adapted. The suction shut-off valve 80 controls both the quantity of the fuel directed from the fuel passage P2 to the fuel passage P3 and the quantity of the fuel directed from the fuel passage P2 to the fuel passage P4 on the basis of an instruction signal from an electronic control unit(ECU).
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公开(公告)号：JP2002213231A
公开(公告)日：2002-07-31
申请号：JP2001010663
申请日：2001-01-18
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUOKA HIROKI , MATSUSHITA SOICHI , OKI HISASHI , HAYASHI KOTARO , ISHIYAMA SHINOBU , KOBAYASHI MASAAKI , SHIBATA DAISUKE , MAGATA HISAFUMI , ODA TOMIHISA , HARADA YASUO , NEGAMI AKIHIKO , OTSUBO YASUHIKO , AOYAMA TARO , TAWARA ATSUSHI
IPC: F01N3/08 , B01D53/86 , B01D53/94 , F01N3/20 , F01N3/28 , F01N9/00 , F01N11/00 , F02B37/00 , F02D9/04 , F02M25/07
Abstract: PROBLEM TO BE SOLVED: To provide arts to enable detection of abnormality of a reducing agent feed mechanism, in an exhaust emission control device for an internal combustion engine provided with a reducing agent feed mechanism to feed a reducing agent to an exhaust gas purifying catalyst. SOLUTION: The exhaust emission control device for an internal combustion engine comprises a reducing agent adding nozzle 28; a reducing agent discharging means 6 to discharge a reducing agent; a reducing agent feed passage 29 to guide a reducing agent to a reducing agent adding nozzle 28; a metering valve 30 situated in the middle of the reducing agent feed passage 29; a cut-off valve 31 situated in the reducing agent feed passage 29 situated upper stream from the metering valve 30; a pressure detecting means 32 situated in the reducing agent feed passage 29 running between the metering valve 30 and the cut-off valve 31; and an abnormality deciding means 35 to decide abnormality of the cut-off valve 31, the metering valve 30, and the reducing agent adding nozzle 28 based on a pressure of the reducing agent after closing of the metering valve 30 and the cut-off valve 31 is controlled and a pressure of the reducing agent after opening and closing of the metering valve 30 is controlled thereafter.
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公开(公告)号：JP2002129945A
公开(公告)日：2002-05-09
申请号：JP2000325623
申请日：2000-10-25
Applicant: TOYOTA MOTOR CORP
Inventor： AOYAMA TARO , MATSUSHITA SOICHI , OKI HISASHI , HAYASHI KOTARO , ISHIYAMA SHINOBU , KOBAYASHI MASAAKI , SHIBATA DAISUKE , MAGATA HISAFUMI , ODA TOMIHISA , HARADA YASUO , NEGAMI AKIHIKO , MATSUOKA HIROKI , OTSUBO YASUHIKO , TAWARA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To provide a technique capable of detecting abnormality in a reduction agent feeding mechanism and to contribute to the suppression of deterioration of exhaust emission and exhaust emission purifying catalyst caused by abnormality in the reduction agent feeding mechanism in an exhaust emission control device for the internal combustion engine equipped with the mechanism feeding a reduction agent in exhaust emission purifying catalyst. SOLUTION: This exhaust emission control device for the internal combustion engine comprises a reduction agent adding nozzle arranged in an exhaust passage located upstream from the exhaust emission purifying catalyst, a reduction agent feeding passage introducing the reduction agent emitted from a reduction agent emission means to the reduction agent adding nozzle, a passage opening and closing valve provided in the reduction agent feeding passage, a pressure detection means provided in the reduction agent feeding passage located downstream from the passage opening and closing means, and an abnormality determining means for determining abnormality on the basis of pressure detected by the pressure abnormality detection means during the opening period of the passage opening and closing valve, and before and after the opening period of the valve.
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公开(公告)号：JP2000213330A
公开(公告)日：2000-08-02
申请号：JP1603799
申请日：1999-01-25
Applicant: TOYOTA MOTOR CORP
Inventor： WATANABE YOSHIMASA , HENDA YOSHIMITSU , TAWARA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To prevent exhaust gas from flowing backward in a filter when demanded output of an internal combustion engine is lowered. SOLUTION: In this exhaust emission control device, filters 7a to 7d for catching particulates discharged from an internal combustion engine 1 are provided on engine exhaust passages 5a to 5d. When demanded output of the internal combustion engine is lowered and also when the target injection fuel amount to be injected to the internal combustion engine is lowered, differential pressure between pressure in the engine exhaust passage on the downstream side of the filter and pressure in the engine exhaust passage on the upstream side of the filter is maintained to a predetermined value or less.
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公开(公告)号：JP2000170521A
公开(公告)日：2000-06-20
申请号：JP34852298
申请日：1998-12-08
Applicant: TOYOTA MOTOR CORP
Inventor： TAWARA ATSUSHI , SUGIYAMA TOSHIHISA
Abstract: PROBLEM TO BE SOLVED: To accurately calculate the capturing amount of a particulate filter. SOLUTION: Individual particulate filters (DPF) 40 are disposed in the respective cylinder exhaust ports of a diesel engine 1. The electronic control unit(ECU) 30 of the engine calculates a particulate amount PMR generated per unit time from the engine based on an engine load and a revolution speed, and also calculates the rate (capturing efficiency) K1 of those captured by the DPF among particulates generated in the engine. The ECU 30 calculates PMR and K1 for each unit time, and calculates the amount of actually captured particulates by the DPE by integrating the values of PMR×K1. Thus, the amount of particulates captured in the DPE is accurately calculated.
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