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1. 发明专利

JP2007303287A Deterioration diagnosis device for exhaust emission control catalyst 有权
标题翻译：用于排气控制催化剂的检测诊断装置
公开(公告)号：JP2007303287A
公开(公告)日：2007-11-22
申请号：JP2006129813
申请日：2006-05-09
申请人： Mitsubishi Motors Corp , 三菱自動車工業株式会社
发明人： CHINO DAISUKE , SAITO KENJI , KAMURA HITOSHI
IPC分类号： F01N3/20 , B01D53/94 , F01N3/24 , F02D45/00
CPC分类号： F01N11/007 , F01N3/101 , F01N2550/02 , F01N2560/025 , F01N2900/0421 , Y02T10/22 , Y02T10/47
摘要： PROBLEM TO BE SOLVED: To provide a deterioration diagnosis device for an exhaust emission control device capable of preventing wrong judgment of deterioration of a three-way catalyst due to deterioration of an upstream side oxygen sensor and accurately judging deterioration of the catalyst. SOLUTION: An ECU 50 is provided with an upstream side reverse rotation speed operation means calculating upstream side rich/lean reverse rotation speed NF, a downstream side rich/lean judgment level adjustment means establishing downstream side rich/lean judgment level large when the upstream side rich/lean reverse rotation speed NF gets lower than the predetermined value, a downstream side reverse rotation speed operation means calculating downstream side reverse rotation speed NR reversing to a rich side/a lean side based on the downstream side rich/learn judgment level established large and output signal of downstream side O2 sensor 41, and a deterioration judgment means calculating frequency ratio NR/NF when suction air quantity to the internal combustion engine is a predetermined lower limit value or more, and predetermined upper limit value or less and judging deterioration of the three-way catalyst 39 when the frequency ratio NR/NF is larger than deterioration judgment value. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决问题的方案：提供一种排气排放控制装置的劣化诊断装置，其能够防止由于上游侧氧气传感器的劣化导致的三元催化剂劣化的错误判断，并且能够准确地判断催化剂的劣化。解决方案：ECU50设置有计算上游侧富/反转速度NF的上游侧反转速度运算装置，下游侧富/稀判断电平调整装置，上游侧富/反转速度NF变得低于预定值，下游侧反向转速操作装置基于下游侧丰富/学习判断来计算逆向富侧/瘦侧的下游侧反转速度NR 下游侧O2传感器41的高电平建立大输出信号，以及当对内燃机的吸入空气量为规定的下限值以上且规定的上限值以下时，计算频率比NR / NF的劣化判定单元，当频率比NR / NF大于劣化判定值时，判断三元催化剂39的劣化。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2008208781A Egr system of internal combustion engine 有权
标题翻译：内燃机EGR系统
公开(公告)号：JP2008208781A
公开(公告)日：2008-09-11
申请号：JP2007046899
申请日：2007-02-27
申请人： Mitsubishi Motors Corp , 三菱自動車工業株式会社
发明人： FURUTA MASAHIRO , CHINO DAISUKE , SAITO KENJI , KAMURA HITOSHI , IWAMA AKIHIRO , KADOOKA AKIRA
IPC分类号： F02D21/08 , F02D43/00 , F02D45/00 , F02M25/07 , G01M99/00
CPC分类号： F02B47/08 , F02D41/0055 , F02M26/49 , Y02T10/121
摘要： PROBLEM TO BE SOLVED: To provide an EGR system of an internal combustion engine for which accurate diagnosis of failure in an EGR device is adequately conducted, and accuracy of the diagnosis of the EGR device is maintained high. SOLUTION: In the case where the opening of an intake air-flow control valve is restrained to a specified opening by a fuel cut, the EGR device is actuated to diagnose a failure of the EGR device on the basis of a change in intake-manifold pressure before and after the operation of the EGR device (S48). In the case where a relaxation control of an intake-manifold negative-pressure is not executed, the change in the intake-manifold pressure is corrected by the amount of change in a first reference intake-pressure (P(Ne)) which changes in accordance with an engine speed Ne (S26). In the case where a relaxation control of the intake-manifold negative-pressure is executed, change in the intake-manifold pressure is corrected by the amount of change in a second reference intake-pressure (PL(Ne)) which changes in accordance with the engine speed Ne (S40). COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种内燃机的EGR系统，其对EGR装置的故障进行准确诊断，并且将EGR装置的诊断精度保持为高。解决方案：在通过燃料切断将进气流量控制阀的打开限制到指定的开度的情况下，EGR装置被致动以基于EGR装置的变化来诊断EGR装置的故障在EGR装置的运转前后的进气歧管压力（S48）。在不执行进气歧管负压的松弛控制的情况下，通过第一基准进气压力（P（Ne））的变化量来校正进气歧管压力的变化，根据发动机转速Ne（S26）。在进行进气歧管负压的松弛控制的情况下，进气歧管压力的变化通过第二基准进气压（PL（Ne））的变化量来修正，该第二参考进气压力发动机转速Ne（S40）。版权所有（C）2008，JPO＆INPIT

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