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公开(公告)号：JP2008180230A
公开(公告)日：2008-08-07
申请号：JP2008110561
申请日：2008-04-21
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： OI YASUHIRO , OKAZAKI SHUNTARO , NAGAI TOSHINARI , OTSUKA IKU , KOBAYASHI DAISUKE , KATO NAOTO
Abstract: PROBLEM TO BE SOLVED: To provide technology for producing best emission property by performing best air-fuel feedback control and accurate purifying performance determination of an exhaust emission purifying catalyst under both all-cylinder operation and partial cylinder operation and in the conditions of the number of all operating cylinders and their combination under partial cylinder operation.
SOLUTION: This variable cylinder system for an internal combustion engine changes a feedback gain for air-fuel ratio feedback control, an air-fuel ratio learning value for air-fuel ratio learning control and the purifying performance determination of the exhaust emission purifying catalyst depending on whether under partial cylinder operation or not and on the number of the operating cylinders or their combination under partial cylinder operation.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 要解决的问题：通过在全缸操作和部分气缸操作以及在全缸操作和部分气缸操作的条件下，通过执行最佳的空气燃料反馈控制和排气净化催化剂的精确净化性能确定来提供产生最佳排放性能的技术 所有操作气缸的数量及其在部分气缸操作下的组合。 解决方案：用于内燃机的可变气缸系统改变空燃比反馈控制的反馈增益，空燃比学习控制的空燃比学习值和排气净化的净化性能确定 催化剂取决于是否在部分气缸操作下以及在部分气缸操作下的操作气缸数量或其组合。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2006257917A
公开(公告)日：2006-09-28
申请号：JP2005073735
申请日：2005-03-15
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： KINOSHITA TAKEO , NAGAI TOSHINARI , ADACHI NORIYASU , KOJIMA KAZUNORI
Abstract: PROBLEM TO BE SOLVED: To optimally control the fuel amount fed into a cylinder by raising the precision in a model calculation in consideration of a deposit adhering to an injector.
SOLUTION: The deposit amount of a cylinder injector 42 is calculated using a tip temperature Tdinj of the calculated cylinder injector 42 (step 102). The values of a cylinder adhesion ratio and a residual ratio are selected corresponding to the deposit amount (steps 106 and 108). The deposit amount of a port injector 40 is calculated using a tip temperature Tpinj of the calculated port injector 40 (step 112). The values of port and valve adhesion ratio and residual ratio are selected corresponding to the deposit. The fuel injection amounts of each injector 40 and 42 are calculated using selected each adhesion ratio and each residual ratio (step 122).
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：考虑到附着在喷射器上的沉积物，通过提高模型计算中的精度来最佳地控制进入气缸的燃料量。 解决方案：使用计算出的气缸喷射器42的尖端温度Tdinj计算气缸喷射器42的沉积量（步骤102）。 对应于沉积量选择气缸附着率和残留比的值（步骤106和108）。 使用所计算的端口喷射器40的尖端温度Tpinj计算端口喷射器40的沉积量（步骤112）。 根据沉积物选择端口和阀门附着率和残留率的值。 每个喷射器40和42的燃料喷射量使用选择的每个粘附比和每个残留比来计算（步骤122）。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2006161766A
公开(公告)日：2006-06-22
申请号：JP2004357610
申请日：2004-12-10
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： KOJIMA KAZUNORI , NAGAI TOSHINARI , KINOSHITA TAKEO
CPC classification number: F02D41/047 , F02D41/3094
Abstract: PROBLEM TO BE SOLVED: To provide a fuel injection quantity control device for an internal combustion engine capable of preventing the occurrence of a phenomenon that fuel adhering to an intake system flows in a droplet state into a combustion chamber (a droplet fuel inflow phenomenon). SOLUTION: This device is applied to the internal combustion engine provided with a dual injection system equipped with a cylinder injection valve and a port injection valve for every cylinder. The device determines that the droplet fuel inflow phenomenon does not occur when the fuel adhesion quantities fwp, fwv are a limit fuel adhesion quantity or less, and sets an injection rate to an optimum cylinder injection rate determined according to the operating state of the engine to determine a port injection quantity fip and a cylinder injection quantity fic. The device determines that there is a possibility of causing the droplet fuel inflow phenomenon when at least one of the fuel adhesion quantities fwp, fwv exceeds the limit fuel adhesion quantity, and fixes the injection rate so that the port injection rate becomes 0%. The actual fuel adhesion quantities fwp, fwv are thereby reduced to respectively become the limit fuel adhesion quantity or less to prevent the occurrence of the droplet fuel inflow phenomenon. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种用于内燃机的燃料喷射量控制装置，其能够防止粘附到进气系统的燃料以液滴状态流入燃烧室的现象（液滴燃料流入 现象）。
解决方案：该装置应用于配备有每个气缸的气缸喷射阀和喷嘴阀的双喷射系统的内燃机。 该装置确定当燃料粘附量fwp，fwv是极限燃料粘附量或更小时，不会发生液滴燃料流入现象，并且将注射速率设定为根据发动机的运行状态确定的最佳气缸喷射速率 确定端口喷射量fip和气缸喷射量fic。 当燃料粘附量fwp，fwv中的至少一个超过限制燃料粘附量时，该装置确定存在导致液滴燃料流入现象的可能性，并且将喷射率固定为使得喷射率变为0％。 由此，实际的燃料附着量fwp，fwv分别变为极限燃料粘附量以下，以防止液滴燃料流入现象的发生。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2004316459A
公开(公告)日：2004-11-11
申请号：JP2003107999
申请日：2003-04-11
Applicant: Toyota Central Res & Dev Lab Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田中央研究所
Inventor： NAGAI TOSHINARI , KATO NAOTO , BABA NAOKI
Abstract: PROBLEM TO BE SOLVED: To precisely detect catalyst deterioration without deteriorating emission characteristics related to a catalyst deterioration detecting device to detect deterioration of catalyst disposed in an exhaust passage of an internal combustion engine. SOLUTION: The catalyst to purify exhaust gas is provided in the exhaust passage in the internal combustion engine. Excess or lack in oxygen quantity in exhaust gas flowing inside the catalyst is estimated for each of blocks A-J in a flow direction of the exhaust gas. Based on result of estimation, a convergence point where the excess or lack of oxygen quantity in exhaust gas becomes a determination value or less is specified, and frequency for each block to have the convergence point (stoichiometric convergence point frequency) is counted. The air-fuel ratio is controlled in such a way that the convergent point is positioned on the upstream side of the catalyst. In a case where high convergence point frequency is recognized in a block on the downstream side even after the air-fuel ratio control, it is determined as catalyst deterioration. COPYRIGHT: (C)2005,JPO&NCIPI
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公开(公告)号：JP2004316457A
公开(公告)日：2004-11-11
申请号：JP2003107986
申请日：2003-04-11
Applicant: Toyota Central Res & Dev Lab Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田中央研究所
Inventor： NAGAI TOSHINARI , KATO NAOTO , BABA NAOKI
Abstract: PROBLEM TO BE SOLVED: To control the air-fuel ratio based on an oxygen occlusion state or the like at a specific position in catalyst in an air-fuel ratio control device for an internal combustion engine to purify exhaust gas by the catalyst disposed in an exhaust passage. SOLUTION: The catalyst to purify the exhaust gas is disposed in the exhaust passage in the internal combustion engine. Quantity of excess or lack of oxygen Cgout (N) in the exhaust gas flowing in the catalyst is determined for every position in a flow direction of exhaust gas (every block divided supposedly). In addition, a convergence point X in the catalyst where the quantity of excess or lack of oxygen in exhaust gas Cgout (N) becomes zero is detected (step 102). In a case where the convergence point is transferring downstream of a target point (step 104), the air-fuel ratio of mixed gas supplied to the internal combustion engine is controlled in such a way that its convergence point transfers upstream (step 106). COPYRIGHT: (C)2005,JPO&NCIPI
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Patent Agency Ranking
公开(公告)号：JP2004270596A
公开(公告)日：2004-09-30
申请号：JP2003064130
申请日：2003-03-10
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： OI YASUHIRO , OKAZAKI SHUNTARO , NAGAI TOSHINARI , OTSUKA IKU , KOBAYASHI DAISUKE , KATO NAOTO
Abstract: PROBLEM TO BE SOLVED: To provide technology providing the best emission characteristics by performing optimum air fuel ratio feedback control and accurate purification capacity determination of exhaust emission control catalyst during both of all cylinder operation and reduced cylinder operation for all number and combination of the operating cylinders during reduced cylinder operation. SOLUTION: In variable cylinder system for an internal combustion engine, feedback gain of air fuel ratio feedback control, air fuel ratio learning value of air fuel ratio learning control, determination of purification capacity of exhaust emission control catalyst or the like are varied according to whether in reduced operation or not, number of the operating cylinders or combination of the operating cylinders during reduced cylinder operation. COPYRIGHT: (C)2004,JPO&NCIPI
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公开(公告)号：JP2004239071A
公开(公告)日：2004-08-26
申请号：JP2003025795
申请日：2003-02-03
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： KOBAYASHI DAISUKE , NAGAI TOSHINARI , OTSUKA IKU , OI YASUHIRO , KATO NAOTO , OKAZAKI SHUNTARO
Abstract: PROBLEM TO BE SOLVED: To reduce a pumping loss; to provide a superior engine starting characteristic and an idle characteristic; and to allow superior temperature control of a catalyst.
SOLUTION: This internal combustion engine 1 generates motive power by burning fuel in a plurality of cylinders C1 to C4, and is provided with a plurality of fuel injection valves i1 to i4 arranged so as to individually correspond to the respective cylinders C1 to C4, an intake valve Vi and an exhaust valve Ve arranged in the respective cylinders C1 to C4, a valve system 9 capable of opening-closing at least the intake valve Vi and the exhaust valve Ve of the respective cylinders C1 to C4 and an ECU 10 capable of performing cylinder reducing operation by stopping fuel supply to a part of the plurality of cylinders C1 to C4. The ECU 10 controls the valve system 9 so as to close the intake valve Vi and the exhaust valve Ve of the whole resting cylinders C1 and C4 when performing the cylinder reducing operation when stating the engine.
COPYRIGHT: (C)2004,JPO&NCIPI-
公开(公告)号：JP2004225618A
公开(公告)日：2004-08-12
申请号：JP2003014648
申请日：2003-01-23
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： KATO NAOTO , NAGAI TOSHINARI , OI YASUHIRO , IDE KOJI
CPC classification number: Y02T10/47
Abstract: PROBLEM TO BE SOLVED: To stably and completely decrease the exhaust amount of emission by performing perturbation control of an air-fuel ratio, directly focusing on conditions of exhaust gas flowing out of a catalyst. SOLUTION: This exhaust emission control device has a catalyst device consisting of first and second catalysts 53, 54 disposed in series in an exhaust passage and an electrical control device 70. An electric control device 70 is integrated with a catalyst model which virtually divides the catalyst device into a plurality of blocks along an exhaust gas flow direction, and computes an oxygen concentration or the like which indicates degree of an over and short of oxygen in the gas flowing out of the respective blocks. The electric control device performs the perturbation control of the air-fuel ratio by controlling so that the air-fuel ratio may become at a prescribed rich air-fuel ratio when the oxygen concentration in the gas flowing out of the controlling blocks selected to move to the downstream side with degradation in oxygen absorbing capability of the catalyst device becomes larger than a positive threshold around "0", and controlling so that the air/fuel ratio may become at a prescribed lean air/fuel ratio when the oxygen concentration becomes smaller than a negative threshold around "0". COPYRIGHT: (C)2004,JPO&NCIPI
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公开(公告)号：JP2004169607A
公开(公告)日：2004-06-17
申请号：JP2002335716
申请日：2002-11-19
Applicant: Toyota Central Res & Dev Lab Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田中央研究所
Inventor： KATAYAMA AKIHIRO , NAGAI TOSHINARI , KATO NAOTO , KOJIMA SHINJI , BABA NAOKI
Abstract: PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine with improved estimation precision of a mathematical model when the control device grasps the state of an exhaust emission control catalyst using the mathematical model and controls the internal combustion engine based on the state of the catalyst. SOLUTION: The control device is equipped with an estimation means for estimating an emission amount of specific components inside and downstream of the exhaust emission control catalyst according to the mathematical model based on an exhaust air-fuel ratio (or an emission amount of specific components) on the downstream side of the exhaust emission control catalyst, a specific component detecting sensor positioned on the downstream side of the exhaust emission control catalyst, and a rich/lean setting means for forcedly vibrating the exhaust air-fuel ratio on the downstream side of the exhaust emission control catalyst into a rich side and a lean side. The estimation means calculates a constant of the mathematical model based on the result detected by the specific component detecting sensor while forcedly vibrating the exhaust air-fuel ratio by the rich/lean setting means, and calculates an estimation value by the mathematical model using the calculated constant. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2004116417A
公开(公告)日：2004-04-15
申请号：JP2002281690
申请日：2002-09-26
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： KATO NAOTO , NAGAI TOSHINARI , OI YASUHIRO , IDE KOJI
CPC classification number: Y02T10/47
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of effectively purifying noxious component by controlling air fuel ratio of gas flowing in a catalyst without fail of feed back control (hunting of air fuel ratio of gas which is controlled by feed back control). SOLUTION: This exhaust emission control device is provided with a first catalyst 53, a second catalyst 54 and a third catalyst 55, a first catalyst down stream air fuel ratio sensor 67, a second catalyst down stream air fuel ratio sensor 68 and a third catalyst down stream air fuel ratio sensor 69, and an electric control device 70. The electric control device controls air fuel ratio of gas flowing into the first catalyst to turn output of the first catalyst down stream air fuel ratio sensor when the maximum oxygen occlusion amount of the first catalyst is higher than a threshold, output of the second catalyst down stream air fuel ratio sensor when sum of the maximum oxygen occlusion amount of the first catalyst and the second catalyst is higher than the threshold, or output of the third catalyst down stream air fuel ratio sensor when sum of the maximum oxygen occlusion amount of the first, the second and the third catalyst is higher than the threshold, into a predetermined target output. COPYRIGHT: (C)2004,JPO
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