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1. 发明授权

EP2489870B1 PRESSURE SENSOR DIAGNOSTIC METHOD AND COMMON RAIL FUEL INJECTION CONTROL DEVICE 有权
公开(公告)号：EP2489870B1
公开(公告)日：2018-08-22
申请号：EP10823342.0
申请日：2010-10-08
申请人： Bosch Corporation
发明人： SUDA Sakae , SATO Eiichi
IPC分类号： F02M55/02 , F02D41/22 , F02M63/00
CPC分类号： F02D41/222 , F02D41/20 , F02D2041/2055 , F02D2041/2058 , F02D2041/223 , F02D2200/0602 , F02D2200/0604 , F02M63/024 , Y02T10/40
摘要： Provided are a pressure sensor diagnosis method and a common-rail-type fuel injection control device which can realize the diagnosis of the presence or the non-presence of abnormality of a pressure sensor with the simple constitution without having a dedicated circuit for diagnosis of an operation such as abnormality or a malfunction of the pressure sensor. A time from a point of time that energizing of injectors 2-1 to 2-n is finished to a point of time that a peak of a counter electromotive current generated in the injectors 2-1 to 2-n is generated after the finishing of the energizing is measured as a valve closing time (S504 to S516). A rail pressure with respect to the measured valve closing time is obtained as an estimated rail pressure Pv based on a correlation acquired in advance between a valve closing time and the rail pressure (S520). When an absolute value of the difference between the estimated rail pressure Pv and an actual rail pressure Pac acquired by a pressure sensor 11 is equal to or less than a predetermined error ±, it is determined that the pressure sensor 11 has no abnormality (S524), while when the absolute value is not equal to or less than a predetermined error ±, it is determined that the pressure sensor 11 has abnormality (S526).

2. 发明公开

EP2489870A1 PRESSURE SENSOR DIAGNOSTIC METHOD AND COMMON RAIL FUEL INJECTION CONTROL DEVICE 审中-公开
标题翻译： DRUKERENSOR-DIAGNOSEVERFAHREN UNDSTEUERGERÄTFÜRCOMMON-RAIL-EINSPRITZUNG
公开(公告)号：EP2489870A1
公开(公告)日：2012-08-22
申请号：EP10823342.0
申请日：2010-10-08
申请人： Bosch Corporation
发明人： SUDA Sakae , SATO Eiichi
IPC分类号： F02M55/02 , F02D41/22 , F02M63/00
CPC分类号： F02D41/222 , F02D41/20 , F02D2041/2055 , F02D2041/2058 , F02D2041/223 , F02D2200/0602 , F02D2200/0604 , F02M63/024 , Y02T10/40
摘要： Provided are a pressure sensor diagnosis method and a common-rail-type fuel injection control device which can realize the diagnosis of the presence or the non-presence of abnormality of a pressure sensor with the simple constitution without having a dedicated circuit for diagnosis of an operation such as abnormality or a malfunction of the pressure sensor.
A time from a point of time that energizing of injectors 2-1 to 2-n is finished to a point of time that a peak of a counter electromotive current generated in the injectors 2-1 to 2-n is generated after the finishing of the energizing is measured as a valve closing time (S504 to S516). A rail pressure with respect to the measured valve closing time is obtained as an estimated rail pressure Pv based on a correlation acquired in advance between a valve closing time and the rail pressure (S520). When an absolute value of the difference between the estimated rail pressure Pv and an actual rail pressure Pac acquired by a pressure sensor 11 is equal to or less than a predetermined error α, it is determined that the pressure sensor 11 has no abnormality (S524), while when the absolute value is not equal to or less than a predetermined error α, it is determined that the pressure sensor 11 has abnormality (S526).
摘要翻译：提供了一种压力传感器诊断方法和共轨型燃料喷射控制装置，其能够以简单的结构实现对压力传感器的存在或不存在异常的诊断，而不需要专门的诊断用电路操作如压力传感器的异常或故障。从喷射器2-1至2-n通电的时间开始到在喷射器2-1至2-n中产生的反电动势的峰值在完成后产生的时间作为关阀时间测量通电（S504〜S516）。基于在关闭时间和轨道压力之间预先获得的相关性，获得相对于测量的阀关闭时间的轨道压力作为估计轨道压力Pv（S520）。当压力传感器11获取的估计轨道压力Pv与实际轨道压力Pac之差的绝对值为规定误差±以下时，判断为压力传感器11没有异常（S524）当绝对值不等于或小于预定误差±时，确定压力传感器11有异常（S526）。

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