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公开(公告)号：JP2003097256A
公开(公告)日：2003-04-03
申请号：JP2001289642
申请日：2001-09-21
Applicant: TOYOTA MOTOR CORP
Inventor： AOYAMA TARO , MATSUOKA HIROKI , SUGIYAMA TATSUMASA , OTSUBO YASUHIKO , ITO TAKEKAZU , TAWARA ATSUSHI
IPC: F02M25/07 , B01D53/94 , F01N3/02 , F01N3/08 , F01N3/24 , F01N3/28 , F02D21/08 , F02D41/02 , F02D41/04 , F02D43/00
Abstract: PROBLEM TO BE SOLVED: To provide a combustion improvement technique for enhancing drivability, reducing engine noise and controlling smoke when switching combustion states. SOLUTION: In an internal combustion engine 1 capable of switching between two combustion states having considerably different EGR rates, the adjustment of the EGR rate is carried out on the basis of oxygen concentrations of exhaust gas. A catalyst converter 52 and a reducing agent adding device 60 which adds the reducing agent to the catalyst converter 52 are provided to the exhaust passage. When changing the EGR rate to switch combustion states, the addition of the reducing agent by the reducing agent adding device 60 is prohibited. When switching combustion states, opening quantities of an EGR valve 16 and a throttle valve 13 are overshot. When switching the fuel injection control accompanied by the switching of combustion states, the switching is temporarily prohibited. At the switching, the device also switches to a regular fuel injection control while being changed gradually.
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公开(公告)号：JP2001234799A
公开(公告)日：2001-08-31
申请号：JP2000054396
申请日：2000-02-25
Applicant: TOYOTA MOTOR CORP
Inventor： HAYASHI KOTARO , MATSUSHITA SOICHI , TAWARA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To prevent generation of bore flashing due to additional fuel injection. SOLUTION: A cylinder fuel injection valve 111 of each of cylinders is controlled by an electronic control unit(ECU) 30 of a diesel engine 1. An exhaust air-fuel ratio is made less than a stocchiometric air-fuel ratio by carrying out additional fuel injection to an expansion stroke or to an exhaust stroke in addition to main fuel injection from the cylinder fuel injection valve when releasing NOx absorbed from a NOx occluding reducing catalyst 70 arranged in an exhaust passage 3 by the ECU. Additional fuel injection is carried out once for every one cylinder stroke cycle in each of cylinders, the number of cycles to carry out additional fuel injection continuously with the one cylinder is limited to the number not to cause bore flashing, and a term of period to stop additional fuel injection for a period of time to sufficiently recover lubricating oil film thickness of a wall surface in the cylinder until following additional fuel injection is started after the additional fuel injection is continuously carried out is provided.
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公开(公告)号：JP2000240436A
公开(公告)日：2000-09-05
申请号：JP4609299
申请日：1999-02-24
Applicant: TOYOTA MOTOR CORP
Inventor： KOBAYASHI MASAAKI , TSUKASAKI YUKIHIRO , ISHIYAMA SHINOBU , TAWARA ATSUSHI
Abstract: PROBLEM TO BE SOLVED: To improve reliability of a reducing agent feeding device to regenerate an NOX occlusion reduction catalyst and prevent worsening of an exhaust property. SOLUTION: An NOX occlusion reduction catalyst 7 is arranged in the exhaust passage 3 of an engine 1 to absorb NOX contained in exhaust gas of an engine under lean air-fuel ratio operation. A liquid reducing agent (light oil) is injected in an exhaust passage situated upper stream from the catalyst 7 through a nozzle 91a and NOX is emitted from the catalyst 7 for reduction purification. A control valve 91b controls a feed of a reducing agent to the nozzle 91a. A cooling jacket 95 is arranged at the periphery of the control valve 91b and by circulating the reducing agent, fed to the control valve, through a cooling jacket 95, the control valve is cooled. Even when a control valve is arranged in a position near the exhaust passage, operation reliability of the control valve is prevented from lowering due to a heat influence and a piping to interconnect the control valve and the nozzle is shortened, whereby a stoppage of injection through a nozzle is improved and an exhaust property is prevented from worsening.
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公开(公告)号：JP2000240428A
公开(公告)日：2000-09-05
申请号：JP4500299
申请日：1999-02-23
Applicant: TOYOTA MOTOR CORP
Inventor： ISHIYAMA SHINOBU , TSUKASAKI YUKIHIRO , TAWARA ATSUSHI , KOBAYASHI MASAAKI
Abstract: PROBLEM TO BE SOLVED: To improve the NOX purification efficiency of an NOX occlusion reduction catalyst. SOLUTION: An NOX occlusion reduction catalyst 7 is arranged in the exhaust passage 3 of an engine 1 to absorb NOX contained in exhaust gas of an engine under lean air-fuel ratio operation. When an NOX occlusion amount of the catalyst 7 attains a predetermined decision value, a reducing agent (diesel oil) is injected in an exhaust passage on the upper stream side of the catalyst 7 through a reducing agent feed nozzle 91 and NOX is emitted from the catalyst 7 for reduction purification. The decision value is set such that an emission amount of unpurified NOX due to exudation under absorption of NOX is decreased to a predetermined low value. This constitution, since emission of unpurified NOX through discharge or exudation owing to the increase of an occlusion NOX amount is suppressed to a low value, remarkably improves the NOX purification efficiency of the whole of the NOX occlusion reduction catalyst.
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公开(公告)号：JP2000161044A
公开(公告)日：2000-06-13
申请号：JP34187698
申请日：1998-12-01
Applicant: TOYOTA MOTOR CORP
Inventor： SUGIYAMA TOSHIHISA , TAWARA ATSUSHI
IPC: F01N3/02
Abstract: PROBLEM TO BE SOLVED: To suppress increase of a fuel consumption amount of an engine and satisfactorily regenerate a particulate filter. SOLUTION: An independent particulate filter(DPF) 40 is arranged on each exhaust port of a cylinder in a diesel engine 1. An electronic control unit(ECU) 30 of the engine performs one of the operations; phase lag of fuel injection timing into the cylinder, injection in an expansion process, throttling of intake, throttling of exhaust when an amount of the particulates captured by the DPF is increased and the engine is operated within a specified operation area, for increasing the exhaust temperature of the engine and burning the captured particulates. The ECU succeeds the regeneration operation, even when the engine operation area is out of the regeneration area during executing the regeneration, until the DPF temperature sensed by a temperature sensor 53 is reduced to a specified value or lower.
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Patent Agency Ranking
公开(公告)号：JPH06272634A
公开(公告)日：1994-09-27
申请号：JP6412093
申请日：1993-03-23
Applicant: TOYOTA MOTOR CORP
Inventor： TAWARA ATSUSHI
Abstract: PURPOSE:To provide a fuel filter of an improved on-vehicle mounting property by also disposing a filter in a pipe on a return side, and integrating it with a filter on a supply side. CONSTITUTION:A filter is constituted of a filter 41 on a supply side and a filter 42 on a return side which are integrated via a partition plate 40. The filters 41, 42 on the supply and return sides are approximately symmetrical in the vertical direction. Passages 414, 424 are formed at the centers of filters elements 413, 423. Fuel flowing in the central passages is reversed so that deposit is removed by the filter elements 413, 423. Consequently the deposit, which is a high molecular component of lubricant deposited in the fuel returned from an injection pump 5, is preented from intruding into a fuel tank to block a fuel system in the case where alcohol is used as the fuel.
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公开(公告)号：JP2009270511A
公开(公告)日：2009-11-19
申请号：JP2008122421
申请日：2008-05-08
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： TAWARA ATSUSHI
CPC classification number: Y02T10/40
Abstract: PROBLEM TO BE SOLVED: To reduce adverse effect caused by drive of a pressure reducing valve for diagnosing whether or not the pressure reducing valve is abnormal or not. SOLUTION: An ECU (electronic control unit) 200 includes a control part 300, a determination part 302 and a limitation part 304. The control part 300 controls a pressure reducing valve so as to drive the same by a predetermined diagnostic mode when diagnosing whether the pressure reducing valve for reducing the pressure of a fuel in a common rail is abnormal or normal. The determination part 302 determines whether or not at least one conditions related to the pressure rise of the fuel in the common rail, a condition related to the pressure decline of the fuel in the common rail, and a condition related to the drive of the pressure reducing valve is satisfied. The limitation part 304 restricts the control for driving the pressure reducing valve if at least either the condition related to the pressure rise of the fuel in the common rail, the condition related to the pressure decline of the fuel in the common rail, or the condition related to the drive of the pressure reducing valve is satisfied. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：减少用于诊断减压阀是否异常的减压阀的驱动引起的不利影响。 解决方案：ECU（电子控制单元）200包括控制部分300，确定部分302和限制部分304.控制部分300控制减压阀，以便通过预定的诊断模式来驱动它 诊断用于降低共轨中的燃料的压力的减压阀是否异常或正常。 确定部302判定与共轨中的燃料的压力上升有关的至少一个条件，与共轨中的燃料的压力下降有关的条件以及与压力的驱动有关的条件 减压阀满足。 限制部304限制用于驱动减压阀的控制，只要与共轨中的燃料的压力上升有关的条件，与共轨中的燃料的压力下降有关的条件， 与减压阀的驱动有关。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JP2009013842A
公开(公告)日：2009-01-22
申请号：JP2007175378
申请日：2007-07-03
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： TAWARA ATSUSHI , HIRAI TARO
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an engine capable of suppressing unburned fuel components from passing through a catalyst in an unreacted state, becoming white smoke, and being discharged into the atmosphere. SOLUTION: An electronic control device 50 executes fuel adding treatment for supplying unburned fuel components to a NOx occlusion reduction catalyst carried by a PM filter 42 provided in an exhaust passage 30. The electronic control device 50 sets a reference exhaust flow rate based on a catalyst bed temperature of the PM filter 42 estimated based on an upstream side exhaust temperature and a downstream side exhaust temperature detected by an upstream side exhaust temperature sensor 55 provided on the upstream side of the PM filter 42 and a downstream side exhaust temperature sensor 56 provided at the downstream side of the PM filter 42, and when the exhaust flow rate is the reference exhaust flow rate or more, inhibits the fuel adding treatment. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 解决的问题：提供一种能够抑制未燃燃料成分在未反应状态下通过催化剂的发动机的废气排放控制装置，成为白烟，并排出到大气中。 解决方案：电子控制装置50执行用于将未燃燃料成分供给到由设置在排气通道30中的PM过滤器42承载的NOx吸留还原催化剂的燃料添加处理。电子控制装置50基于排气流量 基于由设置在PM过滤器42的上游侧的上游侧排气温度传感器55检测出的上游侧排气温度和下游侧废气温度推定的PM过滤器42的催化剂床温度和下游侧排气温度传感器 56设置在PM过滤器42的下游侧，当排气流量为基准排气流量以上时，抑制燃料添加处理。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2007285233A
公开(公告)日：2007-11-01
申请号：JP2006114939
申请日：2006-04-18
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： TAWARA ATSUSHI
IPC: F02D29/02 , F01N3/02 , F01N3/24 , F01N3/36 , F02D41/04 , F02D41/06 , F02D43/00 , F02D45/00 , F02P19/02
CPC classification number: F02P19/026 , F02D41/029 , F02D2041/026
Abstract: PROBLEM TO BE SOLVED: To provide a control device for an engine exhaust system temperature which can increase the longevity of an auxiliary machine which is driven from the demand for the rise in the temperature of the exhaust system. SOLUTION: The control device for the exhaust system temperature is applied to the engine 1 which is constituted on two conditions. The first condition shows that injection control is performed which corrects the fuel injection amount to the increase side from the drive of a glow plug 15. The second condition shows that reproduction control is performed which combusts particulate matter accumulated on a catalyst-support-type filter 73 of an exhaust gas purification device 7. Then the exhaust temperature is raised by driving the glow plug 15 from the condition that the execution condition for the reproduction control is met. When it is estimated that the exhaust temperature does not reach a required value even when the glow plug 15 is driven, the drive of the glow plug 15 based on the satisfaction of the execution condition is prohibited. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation: 要解决的问题：提供一种用于发动机排气系统温度的控制装置，其可以增加从排气系统的温度升高的要求驱动的辅助机器的寿命。 解决方案：用于排气系统温度的控制装置被施加到在两个条件下构成的发动机1。 第一个条件表明，执行喷射控制，其从电热塞15的驱动校正对增加侧的燃料喷射量。第二个条件表明，进行再生控制，其使累积在催化剂载体型过滤器 73.然后，通过满足再现控制的执行条件的条件驱动电热塞15，从而提高排气温度。 当估计即使当电热塞15被驱动时排气温度也不达到所需值时，基于执行条件的满足就禁止了电热塞15的驱动。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2006291817A
公开(公告)日：2006-10-26
申请号：JP2005112834
申请日：2005-04-08
Applicant: Denso Corp , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社デンソー
Inventor： TAWARA ATSUSHI , KOBAYASHI NOBUKI , KOMATSU NOBUHIRO
Abstract: PROBLEM TO BE SOLVED: To accurately remove particulates deposited around a catalyst positioned on the upstream-most side among catalysts installed in an exhaust system. SOLUTION: A burnup control in which a fuel is concentrically and intermittently added from an adding valve 46 and the stop of the addition of the fuel are repeated is performed at the end of a PM regenerative control to burn out PM remaining at the exhaust gas upstream side end of an NOx catalytic converter 25. A rest time b (fuel addition interval) for adding the fuel in the concentrated and intermittent addition of the fuel is adjusted to be more reduced as a final target air-fuel ratio AFt reaches a value nearer the rich side. Since the addition of the fixed amount of fuel is performed in a shorter time as the rest time b is more reduced, a catalyst floor temperature T rapidly rises to a high value. When the environmental conditions when an internal combustion engine 10 is set so that an exhaust gas temperature is hard to rise, a final target air-fuel ratio AFt is corrected to the rich side so that the rest time b can be reduced. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：为了精确地去除安装在排气系统中的催化剂中精确地去除位于最上游侧的催化剂上沉积的颗粒。 解决方案：在PM再生控制结束时执行其中重复从添加阀46同时并间歇地添加燃料并停止添加燃料的燃耗控制，以将剩余的PM NOx催化转化器25的废气上游侧端部。随着最终目标空燃比AFt达到，调整在燃料浓缩和间歇添加中添加燃料的静止时间b（燃料添加间隔） 一个更靠近富人的价值。 由于随着休息时间b的降低，在更短的时间内进行固定量的燃料的添加，所以催化剂底板温度T迅速上升到高值。 当设定内燃机10使得排气温度难以上升的环境条件时，最终目标空燃比AFt被校正到浓侧，从而可以减少休止时间b。 版权所有（C）2007，JPO＆INPIT
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