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公开(公告)号：US20070095051A1
公开(公告)日：2007-05-03
申请号：US11589890
申请日：2006-10-31
CPC分类号： F01N11/007 , F01N3/0864 , F01N2560/025 , F01N2560/14 , F02D41/0295 , F02D41/1441 , F02D41/18 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： A control apparatus for an internal combustion engine has an oxygen storage volume computing unit for computing an oxygen storage volume of a catalyst by using a real air/fuel ratio detected by an air/fuel ratio sensor installed on the upstream side of a catalyst, a center air/fuel ratio representing a stoichiometric air/fuel ratio and an estimated air flow volume or detecting a flow rate of air flowing into the catalyst. A center air/fuel ratio correcting unit for correcting a center air/fuel ratio based on output of a rear air/fuel ratio sensor provided on the downstream side of the catalyst, and an oxygen storage volume computed by an oxygen storage volume computing unit, and the oxygen storage volume computing unit computes an oxygen storage volume by using a center air/fuel ratio corrected by the center air/fuel ratio correcting unit.
摘要翻译： 一种用于内燃机的控制装置，具有一个氧气存储量计算单元，用于通过使用安装在催化剂上游侧的空气/燃料比传感器检测到的实际空气/燃料比来计算催化剂的氧气存储容积， 中心空气/燃料比表示化学计量空气/燃料比和估计的空气流量或检测流入催化剂的空气的流量。 一种中央空燃比校正单元，用于基于设置在催化剂下游侧的后空/燃比传感器的输出和由储氧量计算单元计算的氧储存量来校正中心空燃比， 并且氧气存储量计算单元通过使用由中央空燃比校正单元校正的中心空燃比来计算氧气存储量。
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公开(公告)号：US20070017212A1
公开(公告)日：2007-01-25
申请号：US11492058
申请日：2006-07-25
CPC分类号： F02D41/0295 , F01N11/007 , F01N2550/02 , F02D2200/0814 , Y02A50/2324 , Y02T10/22 , Y02T10/47
摘要： A catalyst diagnosis apparatus comprises a reaction rate calculation unit for calculating a reaction rate of chemical reaction in a three-way catalyst based on an output of an oxygen sensor, and an OSC indicator calculation unit for calculating an OSC indicator indicating an oxygen storage capacity (OSC) of the three-way catalyst based on outputs of a linear air-fuel ratio sensor and the oxygen sensor, and a catalyst degradation determination unit for determining degradation of the three-way catalyst based on the reaction rate and the OSC indicator. The determination of the catalyst degradation can be performed with high accuracy in a manner adapted for influences of external environments, etc.
摘要翻译： 催化剂诊断装置包括：反应速率计算单元，用于基于氧传感器的输出计算三元催化剂中的化学反应的反应速率;以及OSC指示符计算单元，用于计算表示氧气存储容量的OSC指示符（ 基于线性空燃比传感器和氧传感器的输出的三元催化剂的催化剂劣化判定单元，基于反应速度和OSC指标来判定三元催化剂的劣化的催化剂劣化判定单元。 可以以适合于外部环境等的影响的方式以高精度进行催化剂劣化的测定。
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公开(公告)号：US20060190159A1
公开(公告)日：2006-08-24
申请号：US11206793
申请日：2005-08-19
CPC分类号： G01N27/4175 , F02D41/1456 , F02D41/1495
摘要： In a diagnosis apparatus for an internal combustion engine which determines the abnormality of a linear A/F sensor which is disposed on the upstream side of a catalyst of the engine and detects the A/F of exhaust gas, the apparatus includes a response/gain deterioration detection unit that separately detects the response deterioration in which the response of the linear A/F sensor is delayed and the gain deterioration in which the detection sensitivity of the linear A/F sensor is abnormal.
摘要翻译： 在用于确定设置在发动机的催化剂的上游侧并检测排气的A / F的线性A / F传感器的异常的内燃机的诊断装置中，该装置包括响应/增益 劣化检测单元分别检测线性A / F传感器的响应延迟的响应恶化和线性A / F传感器的检测灵敏度异常的增益劣化。
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公开(公告)号：US20050262828A1
公开(公告)日：2005-12-01
申请号：US11136533
申请日：2005-05-25
IPC分类号： F02D45/00 , B01D53/94 , F01N3/20 , F01N3/24 , F01N3/28 , F02D41/04 , F02D41/14 , F02D41/36 , F01N3/00 , F01N7/00
CPC分类号： F02D41/1443 , F02D41/1441 , F02D41/1456 , F02D41/1495 , Y02T10/22
摘要： A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while avoiding a worsening of exhaust emissions, an increase of revolution variations, etc. The diagnostic device comprises an exhaust air-fuel ratio control unit for performing control to keep an air-fuel ratio of exhaust gas flowing into a main catalyst near a stoichiometric ratio in accordance with outputs of downstream air-fuel ratio sensors, a rich/lean switching unit for switching over an air-fuel ratio in each of the cylinder groups to be rich or lean, thereby making diagnosis of each downstream air-fuel ratio sensor, a response detecting unit for detecting a response of the downstream air-fuel ratio sensor when the rich/lean switching of the air-fuel ratio in each cylinder group is performed, and a downstream sensor deterioration determining unit for determining a deterioration of the downstream air-fuel ratio sensor based on the detected response.
摘要翻译： 一种发动机排气净化系统的诊断装置和方法，其能够主动地控制空燃比并且可以高精度和可靠地在发动机排气净化系统中对空燃比传感器，催化剂等进行诊断，同时避免 废气排放恶化，旋转变化的增加等。诊断装置包括排气空燃比控制单元，用于进行控制以使排气流入主催化剂的空燃比接近化学计量比 具有下游空燃比传感器的输出，用于切换每个气缸组中的空燃比的丰富/稀薄切换单元以富或稀，从而对每个下游空燃比传感器进行诊断，响应 检测单元，用于当执行每个气缸组中的空燃比的丰富/稀薄切换时，检测下游空燃比传感器的响应;以及下游传感器测定 确定单元，用于基于检测到的响应来确定下游空燃比传感器的劣化。
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公开(公告)号：US07549284B2
公开(公告)日：2009-06-23
申请号：US11830130
申请日：2007-07-30
IPC分类号： F01N3/00
CPC分类号： F02D41/1443 , F02D41/1441 , F02D41/1456 , F02D41/1495 , Y02T10/22
摘要： A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while avoiding a worsening of exhaust emissions, an increase of revolution variations, etc. The diagnostic device comprises an exhaust air-fuel ratio control unit for performing control to keep an air-fuel ratio of exhaust gas flowing into a main catalyst near a stoichiometric ratio in accordance with outputs of downstream air-fuel ratio sensors, a rich/lean switching unit for switching over an air-fuel ratio in each of the cylinder groups to be rich or lean, thereby making diagnosis of each downstream air-fuel ratio sensor, a response detecting unit for detecting a response of the downstream air-fuel ratio sensor when the rich/lean switching of the air-fuel ratio in each cylinder group is performed, and a downstream sensor deterioration determining unit for determining a deterioration of the downstream air-fuel ratio sensor based on the detected response.
摘要翻译： 一种发动机排气净化系统的诊断装置和方法，其能够主动地控制空燃比并且可以高精度和可靠地在发动机排气净化系统中对空燃比传感器，催化剂等进行诊断，同时避免 废气排放恶化，旋转变化的增加等。诊断装置包括排气空燃比控制单元，用于进行控制以使排气流入主催化剂的空燃比接近化学计量比 具有下游空燃比传感器的输出，用于切换每个气缸组中的空燃比的丰富/稀薄切换单元以富或稀，从而对每个下游空燃比传感器进行诊断，响应 检测单元，用于当执行每个气缸组中的空燃比的丰富/稀薄切换时，检测下游空燃比传感器的响应;以及下游传感器测定 确定单元，用于基于检测到的响应来确定下游空燃比传感器的劣化。
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公开(公告)号：US07266942B2
公开(公告)日：2007-09-11
申请号：US11136533
申请日：2005-05-25
CPC分类号： F02D41/1443 , F02D41/1441 , F02D41/1456 , F02D41/1495 , Y02T10/22
摘要： A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while avoiding a worsening of exhaust emissions, an increase of revolution variations, etc. The diagnostic device comprises an exhaust air-fuel ratio control unit for performing control to keep an air-fuel ratio of exhaust gas flowing into a main catalyst near a stoichiometric ratio in accordance with outputs of downstream air-fuel ratio sensors, a rich/lean switching unit for switching over an air-fuel ratio in each of the cylinder groups to be rich or lean, thereby making diagnosis of each downstream air-fuel ratio sensor, a response detecting unit for detecting a response of the downstream air-fuel ratio sensor when the rich/lean switching of the air-fuel ratio in each cylinder group is performed, and a downstream sensor deterioration determining unit for determining a deterioration of the downstream air-fuel ratio sensor based on the detected response.
摘要翻译： 一种发动机排气净化系统的诊断装置和方法，其能够主动地控制空燃比并且可以高精度和可靠地在发动机排气净化系统中对空燃比传感器，催化剂等进行诊断，同时避免 废气排放恶化，旋转变化的增加等。诊断装置包括排气空燃比控制单元，用于进行控制以使排气流入主催化剂的空燃比接近化学计量比 具有下游空燃比传感器的输出，用于切换每个气缸组中的空燃比的丰富/稀薄切换单元以富或稀，从而对每个下游空燃比传感器进行诊断，响应 检测单元，用于当执行每个气缸组中的空燃比的丰富/稀薄切换时，检测下游空燃比传感器的响应;以及下游传感器测定 确定单元，用于基于检测到的响应来确定下游空燃比传感器的劣化。
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公开(公告)号：US20080028828A1
公开(公告)日：2008-02-07
申请号：US11830130
申请日：2007-07-30
IPC分类号： G01N7/00
CPC分类号： F02D41/1443 , F02D41/1441 , F02D41/1456 , F02D41/1495 , Y02T10/22
摘要： A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while avoiding a worsening of exhaust emissions, an increase of revolution variations, etc. The diagnostic device comprises an exhaust air-fuel ratio control unit for performing control to keep an air-fuel ratio of exhaust gas flowing into a main catalyst near a stoichiometric ratio in accordance with outputs of downstream air-fuel ratio sensors, a rich/lean switching unit for switching over an air-fuel ratio in each of the cylinder groups to be rich or lean, thereby making diagnosis of each downstream air-fuel ratio sensor, a response detecting unit for detecting a response of the downstream air-fuel ratio sensor when the rich/lean switching of the air-fuel ratio in each cylinder group is performed, and a downstream sensor deterioration determining unit for determining a deterioration of the downstream air-fuel ratio sensor based on the detected response.
摘要翻译： 一种发动机排气净化系统的诊断装置和方法，其能够主动地控制空燃比并且可以高精度和可靠地在发动机排气净化系统中对空燃比传感器，催化剂等进行诊断，同时避免 废气排放恶化，旋转变化的增加等。诊断装置包括排气空燃比控制单元，用于进行控制以使排气流入主催化剂的空燃比接近化学计量比 具有下游空燃比传感器的输出，用于切换每个气缸组中的空燃比的丰富/稀薄切换单元以富或稀，从而对每个下游空燃比传感器进行诊断，响应 检测单元，用于当执行每个气缸组中的空燃比的丰富/稀薄切换时，检测下游空燃比传感器的响应;以及下游传感器测定 确定单元，用于基于检测到的响应来确定下游空燃比传感器的劣化。
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公开(公告)号：US20120245824A1
公开(公告)日：2012-09-27
申请号：US13513211
申请日：2010-12-14
IPC分类号： F02D41/30
CPC分类号： F02D41/3845 , F02D41/1454 , F02D41/18 , F02D41/22 , F02D2041/224 , F02D2250/14 , F02D2250/31
摘要： An anomaly in a high-pressure fuel system of an internal combustion engine is diagnosed early on and with high precision, and, further, the anomaly site is identified. With respect to a diagnostic device for a direct injection internal combustion engine, there is provided: an injection correction amount computation means (302) that computes an injection correction amount so as to bring a detected air-fuel ratio to a target air-fuel ratio; a fuel injection valve control means (202) that controls the fuel injection valves with the fuel injection amount corrected based on the injection correction amount; a discharge correction amount computation means (305) that computes a discharge correction amount so as to bring a detected fuel pressure to a target fuel pressure; a fuel pump control means (203) that controls the fuel pump with the discharge amount corrected based on the discharge correction amount; a fuel pressure value shifting means (204) that shifts the value of the detected fuel pressure if the injection correction amount deviates from a predetermined range and until the injection correction amount converges to a given amount within the predetermined range; and an anomaly determination means (306) that determines which of the fuel pump, the fuel injection valves, and the fuel pressure sensor has an anomaly based on the discharge correction amounts before the fuel pressure values shift starts and after the fuel pressure value shift ends, and on the injection correction amount before the fuel pressure value shift starts.
摘要翻译： 早期就以高精度诊断出内燃机的高压燃料系统的异常现象，进一步确定异常现场。 关于直接喷射内燃机的诊断装置，提供：喷射校正量计算装置（302），其计算喷射校正量，以使检测到的空燃比为目标空燃比 ; 燃料喷射阀控制装置（202），其基于喷射校正量校正燃料喷射量来控制燃料喷射阀; 排出校正量计算装置（305），其计算排出校正量以使检测到的燃料压力达到目标燃料压力; 燃料泵控制装置（203），其以基于排出校正量校正的排出量来控制燃料泵; 如果喷射校正量偏离预定范围并且直到喷射校正量收敛到预定范围内的给定量，则将检测到的燃料压力的值偏移的燃料压力值移动装置（204） 以及异常判定装置（306），其基于在燃料压力值变速开始之前和燃料压力值换档结束之后的排出校正量来确定燃料泵，燃料喷射阀和燃料压力传感器中的哪一个具有异常 ，以及在燃料压力值偏移开始之前的喷射校正量。
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公开(公告)号：US08573185B2
公开(公告)日：2013-11-05
申请号：US13513211
申请日：2010-12-14
IPC分类号： F02M59/36
CPC分类号： F02D41/3845 , F02D41/1454 , F02D41/18 , F02D41/22 , F02D2041/224 , F02D2250/14 , F02D2250/31
摘要： An anomaly in a high-pressure fuel system of an internal combustion engine is diagnosed early on and with high precision, and, further, the anomaly site is identified. With respect to a diagnostic device for a direct injection internal combustion engine, there is provided: an injection correction amount computation means (302) that computes an injection correction amount so as to bring a detected air-fuel ratio to a target air-fuel ratio; a fuel injection valve control means (202) that controls the fuel injection valves with the fuel injection amount corrected based on the injection correction amount; a discharge correction amount computation means (305) that computes a discharge correction amount so as to bring a detected fuel pressure to a target fuel pressure; a fuel pump control means (203) that controls the fuel pump with the discharge amount corrected based on the discharge correction amount; a fuel pressure value shifting means (204) that shifts the value of the detected fuel pressure if the injection correction amount deviates from a predetermined range and until the injection correction amount converges to a given amount within the predetermined range; and an anomaly determination means (306) that determines which of the fuel pump, the fuel injection valves, and the fuel pressure sensor has an anomaly based on the discharge correction amounts before the fuel pressure values shift starts and after the fuel pressure value shift ends, and on the injection correction amount before the fuel pressure value shift starts.
摘要翻译： 早期就以高精度诊断出内燃机的高压燃料系统的异常现象，进一步确定异常现场。 关于直接喷射内燃机的诊断装置，提供：喷射校正量计算装置（302），其计算喷射校正量，以使检测到的空燃比为目标空燃比 ; 燃料喷射阀控制装置（202），其基于喷射校正量校正燃料喷射量来控制燃料喷射阀; 排出校正量计算装置（305），其计算排出校正量以使检测到的燃料压力达到目标燃料压力; 燃料泵控制装置（203），其以基于排出校正量校正的排出量来控制燃料泵; 如果喷射校正量偏离预定范围并且直到喷射校正量收敛到预定范围内的给定量，则将检测到的燃料压力的值偏移的燃料压力值移动装置（204） 以及异常判定装置（306），其基于在燃料压力值变速开始之前和燃料压力值换档结束之后的排出校正量来确定燃料泵，燃料喷射阀和燃料压力传感器中的哪一个具有异常 ，以及在燃料压力值偏移开始之前的喷射校正量。
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20.发明申请公开(公告)号：US20060144370A1
公开(公告)日：2006-07-06
申请号：US10563099
申请日：2004-02-06
申请人： Yoichi Iihoshi , Shinji Nakagawa , Toshio Hori , Akira Hikichi
发明人： Yoichi Iihoshi , Shinji Nakagawa , Toshio Hori , Akira Hikichi
CPC分类号： F02M25/0818 , F02B2075/125 , F02D2200/0612 , F02M25/0809 , Y02T10/123
摘要： Pressure detection means detects the pressure of an evaporation purge system that includes a fuel tank and a communicating tube, which connects a canister for adsorbing and retaining fuel vapor to an intake pipe. Shutout means shuts out the evaporation purge system from atmospheric air. A pump is driven for pressurization or depressurization purposes while the shutout means shuts out the evaporation purge system from atmospheric air. The pump is stopped when the pressure detected by the pressure detection means reaches a predetermined level. A leak judgment is formulated in accordance with pump drive time and a pressure change after pump stoppage.
摘要翻译： 压力检测装置检测包括燃料箱和连通管的蒸发吹扫系统的压力，该连通管连接用于吸附和保持燃料蒸汽的进气管的罐。 疏水装置意味着从大气中排出蒸发清洗系统。 驱动泵用于加压或减压目的，而关闭装置则将蒸发吹扫系统从大气中排出。 当压力检测装置检测到的压力达到预定水平时，泵停止。 根据泵驱动时间和泵停止后的压力变化来制定泄漏判定。
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