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61. 发明专利

JPH0579441A IGNITION TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0579441A
公开(公告)日：1993-03-30
申请号：JP24164991
申请日：1991-09-20
申请人： HITACHI LTD
发明人： ICHIHARA TAKANOBU , KATOUGI KOUZOU
IPC分类号： F02D45/00 , F02P5/15 , F02P5/152 , F02P5/153
摘要： PURPOSE:To perform constantly excellent decision of the occurrence of knocking not depending upon unevenness in manufacture and deterioration with age by accumulating vibration data where no knocking occurs and vibration data where knocking occurs, and deciding the occurrence of knocking through comparison of the two data with each other. CONSTITUTION:A control unit 9 receives detection signals from an intake air amount sensor 2, a crank angle sensor 12, and a vibration sensor 17, etc., and computes an ignition timing and a fuel injection amount. In this control unit, the magnitude of a vibration component responding to a crank angle in an ignition timing range in which no knocking is supposed to take place during operation of an internal combustion engine 7 is determined so as to be stored. Further, the magnitude of a vibration component responding to a crank angle in an ignition timing range in which knocking is supposed to take place, so as to be stored. A difference or a ratio between the magnitudes of the abovementioned vibration components is determined. By deciding whether or not knocking characteristics represented by taking the difference or the ratio are contained in vibration data provided each time ignition, the occurrence of knocking is decided.

62. 发明专利

JPH04326036A KNOCKING DETECTION METHOD 失效
公开(公告)号：JPH04326036A
公开(公告)日：1992-11-16
申请号：JP9670391
申请日：1991-04-26
申请人： HITACHI LTD
发明人： ICHIHARA TAKANOBU , KATOUGI KOUZOU
IPC分类号： F02D45/00 , F02P5/15 , F02P5/152 , F02P5/153 , G01M15/00
摘要： PURPOSE:To enable a frequency analysis error due to input cut of a signal to be reduced in a knocking detection device which performs frequency analysis of a knocking sensor signal in real time and performs knocking detection. CONSTITUTION:In a knocking detection device with a means for performing frequency analysis of a knock sensor signal in real time and a means for judging presence or absence of knocking according to a size of an obtained spectrum value, an error in frequency analysis is reduced by performing weighting to a time-series data of a inputted knock sensor signal and then matching both signal levels within the frequency analysis section forcibly, thus enabling the error in frequency analysis due to input cut of signals to be reduced and hence detection accuracy of knocking to be improved.

63. 发明专利

JPH04166647A KNOCKING DETECTION DEVICE 失效
公开(公告)号：JPH04166647A
公开(公告)日：1992-06-12
申请号：JP29205390
申请日：1990-10-31
申请人： HITACHI LTD
发明人： KATOUGI KOUZOU , ICHIHARA TAKANOBU , TOKUDA HIROATSU , KURIHARA NOBUO , KANEYASU MASAMI
IPC分类号： F02P5/152 , F02D45/00 , F02P5/15 , F02P5/153
摘要： PURPOSE:To easily judge a knocking occurrence with composite judging for the knocking occurrence made possible by determining at least two resonance frequency components, included in the output of a vibration sensor, with the component range limited from a first crank angle to a second crank angle. CONSTITUTION:Vibration, produced by pressure variation following combustion in a combustion chamber, is caught with a knocking sensor 17 fitted in the vicinity of the combustion chamber, is outputted as an electric signal, and is inputted in a CPU in a control unit 9 via an amplifier and an AD converter. AD conversion is made at given time intervals in a given period, these AD conversion results are successively stored in a RAM, a frequency analysis requesting flag is sent to the CPU at the point of time when a converted number becomes (n), and frequency analysis is made with the CPU. Analyzed results including specific frequencies are selected and extracted from the frequency analysis result, and (m) results are added in order of the larger sizes of components. A knocking occurrence is recognized when an added result is compared with a mean value at the time of the knocking occurrence and found to have a ratio of a given value or more.

64. 发明专利

JPH0481546A KNOCKING DETECTOR OF ENGINE 失效
公开(公告)号：JPH0481546A
公开(公告)日：1992-03-16
申请号：JP19493190
申请日：1990-07-25
申请人： HITACHI LTD
发明人： KATOUGI KOUZOU , ICHIHARA TAKANOBU
IPC分类号： F02P5/15 , F02D45/00 , F02P5/152 , F02P5/153
摘要： PURPOSE:To surely detect knocking regardless of the positional relation ship between a knocking sensor and a cylinder by calculating a relative coeffcient between signals of a cylinder interal pressure sensor and a knocking sensor, and calculating intensity of knock generation according to frequency components included in a knock sensor signal. CONSTITUTION:A means which controls an ignition timing or a means which controls an air-fuel ratio is provided so that knocking can be generated. There is also provided a means (charge amplifier) which amplifies knocking signals to a proper amplitude, a means (band pass filter) which collects the knocking signals an auxiliary means to measure the intensity of the knocking, and a means which analizes collected data. Consequently, repeatability of knocking detection is improved.

65. 发明专利

JPH03267547A KNOCKING DETECTING DEVICE FOR ENGINE 失效
公开(公告)号：JPH03267547A
公开(公告)日：1991-11-28
申请号：JP6709590
申请日：1990-03-19
申请人： HITACHI LTD
发明人： KATOUGI KOUZOU , ICHIHARA TAKANOBU , KITANO KOJI , KAYANO MITSUO , KANEYASU MASAMI
IPC分类号： F02P5/152 , F02D45/00 , F02P5/15 , F02P5/153 , G01H17/00 , G01M15/00
摘要： PURPOSE:To detect the knocking coping with the kind of engine and the secular change by A/D-converting the signal of a knock sensor, storing the signal as the data train in time sequence, obtaining a plurality of frequency components through the addition and subtraction calculation of the data train, detecting the relation of magnitude from a threshold value for each component and combining the relation of magnitude of each component. CONSTITUTION:A cylinder internal pressure sensor or knock sensor detects the pressure variation accompanied with the combustion in a combustion chamber or the vibration in the generation of knocking, and the signal having a sufficient amplitude through amplification can be A/D-converted. A means for region restriction can eliminate the influence of the repetitive frequency in the frequency analysis. A/D conversion is carried out at each certain time interval, and the data train is stored, and the input signal can be analyzed in time sequence. Knocking can be detected by analyzing the frequency only for a specific frequency by analyzing the data train. The method for frequency analysis can be carried out at high speed by using only addition and subtraction calculation.

66. 发明专利

JPH02301634A THROTTLE CONTROL METHOD 失效
公开(公告)号：JPH02301634A
公开(公告)日：1990-12-13
申请号：JP12154089
申请日：1989-05-17
申请人： HITACHI LTD
发明人： ICHIHARA TAKANOBU , SHIDA MASAMI , KONO KAZUYA , ISHII TOSHIO
IPC分类号： F02D41/04 , B60W30/00 , F02D9/02
摘要： PURPOSE:To enhance operational feeling by providing an accelerator opening detecting means, a gear position detecting means, a vehicle speed detecting means, a vehicle-distance detecting means, and also providing an operational direction discriminating means by which the operational direction is discriminated from the outputs of the above detecting means. CONSTITUTION:When the detected results of a gear position detecting means 4 and a vehicle speed detecting means 5 are used as the input of an operational direction discriminating means 3, the detected gear position is compared with the reference gear position which has been previously determined to the rate of the vehicle speed in the discriminating means 3, and from the result of the comparison, it is judged whether the vehicle speed is the 'sudden acceleration direction' for an operator preferring a sudden acceleration or whether it is the 'gradual acceleration direction' for one preferring a gradual acceleration. In a throttle-valve driving means 6, the opening of the throttle valve or the changing rate of the opening is controlled in accordance with the detected opening of an accelerator opening detecting means 2 and the judgment result of the discriminating means 3.

67. 发明专利

JP2010071116A Control device for engine 审中-公开
标题翻译：发动机控制装置
公开(公告)号：JP2010071116A
公开(公告)日：2010-04-02
申请号：JP2008236998
申请日：2008-09-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKAGAWA SHINJI , KANETOSHI KAZUHIKO , KATOGI KOZO , ICHIHARA TAKANOBU , OSUGA MINORU
IPC分类号： F02D29/02 , F02B31/00 , F02D13/02 , F02D41/04 , F02D45/00
CPC分类号： Y02T10/146
摘要： PROBLEM TO BE SOLVED: To provide a control device for an engine effectively inhibiting deterioration of exhaust emission during restart after idling stop by preventing inside of a catalyst from getting into a strong oxidizing atmosphere without causing complication and cost increase of a valve train and the like. SOLUTION: Control for burning air fuel mixture at minute torque so as to keep an inside of the catalyst in a state near stoichiometric condition is executed during a period from a point of time of determination to the stop of the engine when determining to stop the engine. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种用于发动机的控制装置，通过防止催化剂内部进入强氧化气氛而有效地抑制重启后排气的劣化，而不会引起气门机构的复杂化和成本增加等等。解决方案：在从确定到发动机停止的时间段期间执行以微小扭矩燃烧空气燃料混合物以将催化剂保持在接近化学计量条件的状态的控制，当确定为停止发动机版权所有（C）2010，JPO＆INPIT

68. 发明专利

JP2010025091A Control device of cylinder injection type internal combustion engine 审中-公开
标题翻译：气缸喷射式内燃机的控制装置
公开(公告)号：JP2010025091A
公开(公告)日：2010-02-04
申请号：JP2008191189
申请日：2008-07-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATOGI KOZO , MATOHARA SHINYA , KANETOSHI KAZUHIKO , ICHIHARA TAKANOBU
IPC分类号： F02D41/14 , F02D41/02 , F02D41/22 , F02D41/34 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To correct an injection quantity characteristic of a fuel injection valve on an onboard basis so as to be capable of coping even with an individual difference and a secular change in the fuel injection valve.
SOLUTION: When an engine operation state satisfies a predetermined condition and the detecting air-fuel ratio is converged in the target air-fuel ratio, a fuel injection quantity arithmetically operated based on the engine operation state is equally divided, and an air-fuel ratio correction quantity provided by air-fuel ratio feedback control is also equally divided similarly to the fuel injection quantity, and divided injection is performed for successively supplying a divided driving pulse having a pulse width corresponding to an equally divided fuel injection quantity of adding the equally divided air-fuel ratio correction quantity to the equally divided fuel injection quantity to the fuel injection valve, and a deviation quantity ΔU50 from an ideal characteristic line of the fuel injection quantity on an equally divided driving pulse width, is determined based on the divided air-fuel ratio correction quantity provided until the detecting air-fuel ratio is converged in the target air-fuel ratio by the divided injection, and this deviation quantity ΔU50 is learnt.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了在燃料喷射阀的个体差异和长期变化的情况下，能够基于车载来校正燃料喷射阀的喷射量特性。解决方案：当发动机运转状态满足预定条件并且检测空燃比被收敛于目标空燃比时，基于发动机运转状态计算运算的燃料喷射量被等分，空气通过空燃比反馈控制提供的燃料比校正量也与燃料喷射量类似地分配，并且执行分割喷射以连续地提供具有对应于等分的燃料喷射量的相加的脉冲宽度的分频驱动脉冲基于等分的驱动脉冲宽度，对燃料喷射阀的等分燃料喷射量的等分空燃比校正量以及与燃料喷射量的理想特性线的偏差量ΔU50，基于分配空燃比校正量，直到检测空燃比收敛在容积中 t分配喷射的空燃比，并且学习该偏差量ΔU50。版权所有（C）2010，JPO＆INPIT

69. 发明专利

JP2008223643A Engine control device 有权
标题翻译：发动机控制装置
公开(公告)号：JP2008223643A
公开(公告)日：2008-09-25
申请号：JP2007064305
申请日：2007-03-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKAGAWA SHINJI , KANETOSHI KAZUHIKO , KATOGI KOZO , ICHIHARA TAKANOBU , OSUGA MINORU
IPC分类号： F02D41/06 , F02D13/02 , F02D45/00
CPC分类号： F02D41/1497 , F02D35/023 , F02D41/0002 , F02D41/042 , F02D2200/1004 , F02D2200/1006 , F02D2250/18
摘要： PROBLEM TO BE SOLVED: To provide an engine startup control method assuring excellent startability and low exhaust emission (small amount of gas).
SOLUTION: This control device for starting an engine (from its stop state) is provided with: a means for setting a target engine operating state of each combustion; a means for detecting an actual engine operating state of each combustion; and a means for computing a control parameter for each subsequent combustion based on the target operating state of each combustion and the actual operating state of each combustion.
COPYRIGHT: (C)2008,JPO&INPIT

70. 发明专利

JP2008202413A Fuel control device of internal combustion engine 有权
标题翻译：内燃机燃油控制装置
公开(公告)号：JP2008202413A
公开(公告)日：2008-09-04
申请号：JP2007036133
申请日：2007-02-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIHARA TAKANOBU , KANETOSHI KAZUHIKO , KATOGI KOZO , TAKAMURA HIROYUKI
IPC分类号： F02D41/06 , F02D41/04 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To prevent the exhaust amount of unburned gas and a rotational fluctuation from increasing by quickly detecting a lean state and controlling a fuel injection amount with high response even if an air-fuel ratio is quickly leaned during the cold starting of an internal combustion engine.
SOLUTION: This fuel control device of an internal combustion engine comprises a fuel injection valve installed in the intake port of each cylinder or in each cylinder, a rotational fluctuation amount calculation means 1 for calculating the rotational fluctuation amount for each ignition cycle, an integrating means 3 for integrating the rotational fluctuation amount of a set quantity, and a fuel correcting means 5 for correcting the fuel injection amount of the fuel injection valve according to the integrated value of the rotational fluctuation amount calculated by the integrating means 3 after the starting. The integrating means 3 changes the set quantity within the range of one or more according to the rotational fluctuation amount. The integrated amount is quickly calculated by the integrating means 3, and the fuel injection amount is controlled.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使在冷空气中迅速倾斜空燃比，为了通过快速检测稀薄状态并且高反应地控制燃料喷射量来防止未燃烧气体的排出量和旋转波动增加起动内燃机。解决方案：内燃机的燃料控制装置包括安装在每个气缸或每个气缸的进气口中的燃料喷射阀，用于计算每个点火循环的旋转波动量的旋转波动量计算装置1，用于对设定量的旋转变动量进行积分的积分装置3和用于根据由积分装置3计算出的旋转波动量的积分值来校正燃料喷射阀的燃料喷射量的燃料校正装置5 开始。积分装置3根据旋转变动量在一个以上的范围内改变设定量。由积分装置3快速计算积分量，控制燃料喷射量。版权所有（C）2008，JPO＆INPIT

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