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    • 1. 发明专利
    • Fuel injection control device
    • 燃油喷射控制装置
    • JP2012026339A
    • 2012-02-09
    • JP2010164756
    • 2010-07-22
    • Denso Corp株式会社デンソー
    • KOMATSU KO
    • F02D41/38F02D45/00F02M47/00
    • F02D41/2467F02D41/2416F02D41/247F02D2200/0602F02D2250/04
    • PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of accurately controlling an actual injection state.SOLUTION: The fuel injection control device includes a parameter acquisition means 33a acquiring the parameter (for instance, injection end time R4) of an injection rate waveform showing the variation of an injection rate based on the detection value of a fuel pressure sensor, a learning means 33b storing as learning values the injection command signal (for instance, energization period Tq) outputted to a fuel injection valve and the parameter R4 corresponding to the signal, a memory 32 (storage means) stored with a model waveform M3 showing that the parameter R4 varies periodically with a variation of the injection command signal Tq, and an interpolation means 33c calculating the injection command signal Tq situated between the learning values and the value of the parameter R4 situated at the signal by interpolating the learning values using the model waveform M3.
    • 要解决的问题:提供能够精确地控制实际喷射状态的燃料喷射控制装置。 解决方案:燃料喷射控制装置包括参数获取装置33a,其基于燃料压力传感器的检测值来获取表示喷射率变化的喷射率波形的参数(例如,喷射结束时间R4) 存储输出到燃料喷射阀的喷射指令信号(例如通电期间Tq)和对应于该信号的参数R4的学习值的学习单元33b,存储有模型波形M3的存储器32(存储单元) 参数R4随着喷射指令信号Tq的变化而周期性地变化,并且内插装置33c通过使用上述方法内插学习值来计算位于该信号之间的学习值与参数R4的值之间的喷射命令信号Tq 型号波形M3。 版权所有(C)2012,JPO&INPIT
    • 2. 发明专利
    • Fuel injection state detection device
    • 燃油喷射状态检测装置
    • JP2012013036A
    • 2012-01-19
    • JP2010151928
    • 2010-07-02
    • Denso Corp株式会社デンソー
    • KOMATSU KO
    • F02D41/04F02D41/32F02D41/38F02D45/00
    • F02D41/20F02D41/3809F02D41/40F02D2041/1432F02D2200/0602F02D2250/04F02M47/027F02M57/005F02M2200/247Y02T10/44
    • PROBLEM TO BE SOLVED: To provide a fuel injection state detection device that accurately detects an injection state and reduces arithmetic processing load.SOLUTION: A high frequency component higher than a predetermined frequency is removed from a waveform W detected upon injection by a second low pass filter 33 (filtering means) to extract a supply pressure waveform component Wb. The supply pressure waveform component Wb is subtracted from the waveform W detected upon injection to calculate an injection pressure waveform component Wc by a subtractor 34 (injection pressure waveform calculating means). An injection rate waveform (fuel injection state) is estimated based on the injection pressure waveform component Wc by an injection rate waveform arithmetic unit 35 (injection state estimating means). The supply pressure waveform component Wb can be acquired without using a fuel pressure sensor corresponding to a non-injection cylinder, thereby accurately detecting the injection pressure waveform component Wc indicating the actual injection state and reducing arithmetic processing load on an ECU generating a detection waveform from a value detected by the fuel pressure sensor.
    • 要解决的问题:提供一种能够精确地检测喷射状态并降低运算处理负荷的燃料喷射状态检测装置。 解决方案:从通过第二低通滤波器33(滤波装置)注入的检测到的波形W去除高于预定频率的高频分量,以提取供给压力波形分量Wb。 从喷射检测到的波形W中减去供给压力波形成分Wb,由减法器34(注入压力波形计算装置)计算出喷射压力波形成分Wc。 喷射率波形运算单元35(喷射状态估计装置)基于喷射压力波形分量Wc估计喷射率波形(燃料喷射状态)。 可以在不使用与非注射缸相对应的燃料压力传感器的情况下获取供给压力波形分量Wb,从而精确地检测表示实际喷射状态的喷射压力波形成分Wc,并且减少对产生检测波形的ECU的运算处理负荷 由燃料压力传感器检测的值。 版权所有(C)2012,JPO&INPIT
    • 3. 发明专利
    • 圧力センサの特性近似方法、圧力センサの特性取得方法、近似された特性を用いて圧力を算出する方法及び装置、取得された特性を用いて圧力を算出する方法及び装置、近似された特性を記憶する記憶媒体、圧力センサの異常判定方法。
    • 用于压力传感器特性的方法,用于采用压力传感器特性的方法和方法以及使用近似特征计算压力的方法和装置,用于使用获取特征计算压力的方法和装置,用于存储近似特性的记录介质以及用于确定压力传感器中的异常的方法
    • JP2015025737A
    • 2015-02-05
    • JP2013155513
    • 2013-07-26
    • 株式会社デンソーDenso Corp
    • KOMATSU KO
    • G01L27/02
    • 【課題】近似誤差を抑制するとともに、できる限り少ない数の近似式の組合せで圧力センサの特性を近似する。【解決手段】第1圧力から第2圧力まで、所定間隔で出力電圧と圧力との対応関係を測定する特性測定工程と、第1圧力及びそれに対応する出力電圧で特定される第1点と、第2圧力及びそれに対応する出力電圧で特定される第2点とを結ぶ基準特性を算出する基準特性算出工程と、測定された対応関係の各出力電圧において、算出された基準特性との圧力の偏差を算出する偏差算出工程と、算出された偏差が極大もしくは極小となる電圧を境界電圧とする境界電圧算出工程と、算出された境界電圧及び対応関係において境界電圧に対応する圧力で特定される点のうち、境界電圧が隣り合う点同士を結ぶ近似式を算出する近似式算出工程と、算出された近似式、及び近似式に対応する境界電圧を記憶する記憶工程と、を備える。【選択図】図5
    • 要解决的问题:使用尽可能少的近似方程的组合逼近压力传感器的特性,并且抑制近似的误差。解决方案:本发明包括:测量输出之间的对应关系的特性测量步骤 从第一压力到第二压力的规定间隔的电压和压力; 参考特性计算步骤,计算将由第一压力指定的第一点和与其对应的输出电压连接的参考特性和由第二压力指定的第二点和与其对应的输出电压; 偏差计算步骤,用于在测量的对应关系中计算每个输出电压下的计算出的参考特性的压力偏差; 边界电压计算步骤,使计算出的偏差变得最大或最小的电压成为边界电压; 近似式计算步骤,计算在所计算的边界电压指定的点和对应于边界电压的压力之间,将边界电压彼此相邻的点相关联的近似方程; 以及存储步骤,存储所计算出的近似等式和对应于近似等式的边界电压。
    • 4. 发明专利
    • Noise existence diagnosis device of fuel injection system
    • 燃油注射系统的噪声识别装置
    • JP2012122429A
    • 2012-06-28
    • JP2010275051
    • 2010-12-09
    • Denso Corp株式会社デンソー
    • KOMATSU KO
    • F02D45/00F02D41/04F02D41/38F02M65/00
    • F02D41/40F02D2041/2055F02D2200/0602F02D2200/0618F02M47/027F02M57/005F02M2200/247Y02T10/44
    • PROBLEM TO BE SOLVED: To provide a noise existence diagnosis device of a fuel injection system for restraining deterioration in the accuracy of fuel injection control by discriminating whether or not noise is superimposed on a fuel pressure waveform.SOLUTION: The noise existence diagnosis device is premised to be applied to the fuel injection system having a fuel pressure sensor for detecting fuel pressure in a fuel injection valve, a fuel pressure waveform detecting means for detecting a change in the fuel pressure caused according to injection as a fuel waveform based on a detection value of the fuel pressure sensor and an injection state analyzing means for analyzing an injection state based on the detected fuel pressure waveform, and is characterized by having a differential arithmetic operation means (S32) for arithmetically operating a differential waveform of expressing a change in a differential value corresponding to the fuel pressure waveform (an injection waveform Wb) and noise determining means (S33, S34 and S35) each determining that the noise is superimposed on the fuel pressure waveform when there exist in the differential waveform a place in which there exist points becoming higher in threshold exceeding predetermined upper limit thresholds A2, B2 and C2 or a place in which there exist points becoming lower in threshold exceeding predetermined lower limit thresholds A1, B1 and C1.
    • 要解决的问题:提供一种用于通过识别噪声是否叠加在燃料压力波形上来抑制燃料喷射控制精度的劣化的燃料喷射系统的噪声存在诊断装置。 解决方案:噪声存在诊断装置被提前应用于具有用于检测燃料喷射阀中的燃料压力的燃料压力传感器的燃料喷射系统,用于检测燃料压力变化的燃料压力波形检测装置 根据燃料压力传感器的检测值的燃料波形的喷射,以及基于检测到的燃料压力波形来分析喷射状态的喷射状态分析装置,其特征在于具有:差分运算装置(S32),用于 算术地操作表示对应于燃料压力波形(喷射波形Wb)和噪声确定装置(S33,S34和S35)的差分值的变化的差分波形,每个确定噪声叠加在燃料压力波形上时 存在于差异波形中,存在阈值越高的阈值越高的地方 上限阈值A2,B2和C2或存在点的阈值超过预定下限阈值A1,B1和C1的位置。 版权所有(C)2012,JPO&INPIT
    • 5. 发明专利
    • Fuel injection state detecting device
    • 燃油喷射状态检测装置
    • JP2012026323A
    • 2012-02-09
    • JP2010164036
    • 2010-07-21
    • Denso Corp株式会社デンソー
    • KOMATSU KO
    • F02D45/00F02D41/40
    • F02D41/2467F02D41/221F02D2200/0602F02D2200/0616F02D2200/0618
    • PROBLEM TO BE SOLVED: To provide a fuel injection state detecting device capable of improving the computing accuracy of an injection rate waveform by improving the calculating accuracy of reference pressure.SOLUTION: The fuel injection state detecting device includes a pressure waveform acquisition means acquiring the pressure waveform showing the variation of the detection value of a fuel pressure sensor, a reference pressure calculation means calculating the reference pressure Pbase based on a before-drop-starting waveform among pressure waveforms which is the waveform before a pressure drop starts with an injection start, and an injection rate waveform computation means computing the injection rate waveform based on the pressure waveform and the reference pressure Pbase. The reference pressure calculation means includes a search means S20-S23 searching a stable part in the before-drop-starting waveform where pressure variation is within a predetermined range, and calculation means S30, S31 calculating the reference pressure Pbase based on the pressure of the stable part.
    • 要解决的问题:提供一种能够通过提高基准压力的计算精度来提高喷射率波形的计算精度的燃料喷射状态检测装置。 解决方案:燃料喷射状态检测装置包括:压力波形获取装置,获取表示燃料压力传感器的检测值的变化的压力波形;基准压力计算装置,基于前置放大器计算基准压力Pbase; 压力波形之间的起始波形是压力开始于喷射开始之前的波形,喷射率波形运算装置根据压力波形和基准压力Pbase计算喷射率波形。 参考压力计算装置包括搜索装置S20-S23,在搜索稳定部分的压力变化在预定范围内的降落启动波形中,以及计算装置S30,S31,基于压力变化的压力计算基准压力Pbase 稳定部分。 版权所有(C)2012,JPO&INPIT
    • 6. 发明专利
    • Detection apparatus for fuel injection valve
    • 燃油喷射阀检测装置
    • JP2010285889A
    • 2010-12-24
    • JP2009138440
    • 2009-06-09
    • Denso Corp株式会社デンソー
    • KOMATSU KO
    • F02D45/00F02M51/06G01L23/22
    • F02M57/005F02D35/023F02D35/025F02D41/222
    • PROBLEM TO BE SOLVED: To provide a detecting apparatus for a fuel injection valve, improving the calculation accuracy when detecting with a sensor device the fuel pressure or the fuel temperature in a fuel injection valve, and calculating the same with a calculation device.
      SOLUTION: The detecting apparatus is equipped with: a sensor device 20 having a fuel pressure sensing circuit 22 for outputting a pressure sensing signal according to the fuel pressure; and an ECU (calculation device) for calculating the fuel pressure, based on a voltage value of a pressure sensing signal with respect to a reference voltage. The ECU obtains a comparing voltage according to the voltage applied to the fuel pressure sensing circuit 22 for calculating the difference between the obtained comparing voltage and the reference voltage. The sensor device 20 adjusts the applied voltage for making smaller the difference calculated by the ECU. Since the difference between the applied voltage and the reference voltage is canceled thereby, the calculation accuracy of the fuel pressure is improved.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种用于燃料喷射阀的检测装置,在利用传感器装置检测燃料喷射阀中的燃料压力或燃料温度的同时,提高计算精度,并使用计算装置 。 解决方案:检测装置配备有:具有用于根据燃料压力输出压力检测信号的燃料压力检测电路22的传感器装置20; 以及用于基于相对于参考电压的压力感测信号的电压值来计算燃料压力的ECU(计算装置)。 ECU根据施加到燃料压力检测电路22的电压获得比较电压,以计算所获得的比较电压和参考电压之间的差。 传感器装置20调整所施加的电压以使由ECU计算出的差值变小。 由于施加电压和参考电压之间的差被抵消,所以燃料压力的计算精度提高。 版权所有(C)2011,JPO&INPIT