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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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公开(公告)号：US20110179774A1
公开(公告)日：2011-07-28
申请号：US13010302
申请日：2011-01-20
申请人： Yoichi IIHOSHI , Ryusei Miura , Eisaku Fukuchi , Akihito Numata
发明人： Yoichi IIHOSHI , Ryusei Miura , Eisaku Fukuchi , Akihito Numata
IPC分类号： F01N11/00
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1454
摘要： To prevent the deterioration of exhaust emissions of an internal combustion engine due to air-fuel ratio variation among multiple cylinders, and to identify an abnormal cylinder during an abnormality of cylinder air-fuel ratio variation. An control apparatus of an internal combustion engine comprising upstream air-fuel ratio detection means for detecting upstream air-fuel ratio of the catalyst that purifies exhaust emissions discharged from multiple cylinders, and configured to control air-fuel ratio of the multiple cylinders based on the upstream air-fuel ratio, wherein the air-fuel ratio variation among the multiple cylinders is increased and the upstream air-fuel ratio is controlled to become rich. Further, an abnormality of the air-fuel ratio variation among the multiple cylinders and an abnormal cylinder are identified based on an output of an air-fuel ratio sensor in downstream of the catalyst when the air-fuel ratio variation is increased, or an estimated value of an air-fuel ratio (central air-fuel ratio) at which the purification efficiency of the catalyst becomes optimal.
摘要翻译： 为了防止由于多个气缸之间的空燃比变化引起的内燃机的废气排放的恶化，并且在气缸空燃比变化的异常期间识别异常气缸。 一种内燃机的控制装置，包括上游空燃比检测装置，用于检测催化剂的上游空燃比，其净化从多个气缸排出的废气排放，并且被配置为基于所述多个气缸来控制多个气缸的空燃比 上游空燃比，其中多个气缸之间的空燃比变化增加，并且上游空燃比被控制为变浓。 此外，当空燃比变化增加时，基于催化剂下游的空燃比传感器的输出来识别多个气缸和异常气缸之间的空燃比变化的异常，或估计 催化剂的净化效率最优的空燃比（中央空燃比）的值。
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