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公开(公告)号：US20160298565A1
公开(公告)日：2016-10-13
申请号：US15037447
申请日：2014-11-10
Applicant: DENSO CORPORATION
Inventor： Hiroaki NAGATOMO , Makoto TANAKA
CPC classification number: F02D41/2467 , F02D41/20 , F02D41/40 , F02D2041/2006 , F02D2041/2058 , F02D2041/2065 , F02M51/061 , F02M51/0671 , F02M51/0685 , Y02T10/44
Abstract: A fuel injection controller includes an energization time period calculation portion adapted to calculate an energization time period of a coil responsive to a target injection amount; and a rise control portion adapted to apply a boosted voltage to the coil, along with start of the energization time period, and to raise an current flowing through the coil to a predetermined threshold value. When a range where timing of the current raised to have a peak value at the threshold value appears in accordance with a range of an operating temperature of the coil is defined as a peak appearance range W1, the target injection amount is set such that timing of completion of the energization time period Ti is timing deviated from the peak appearance range W1.
Abstract translation: 燃料喷射控制器包括：通电时间计算部，其适于根据目标喷射量计算线圈的通电时间周期; 以及上升控制部分，其适用于向线圈施加升压电压以及通电时间段的开始，并且将流过线圈的电流升高到预定阈值。 当根据线圈的工作温度的范围出现电流上升到具有阈值的峰值的电流的范围被定义为峰值出现范围W1时，将目标喷射量设定为 通电时间段Ti的完成是从峰值出现范围W1偏离的时间。
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公开(公告)号：US20210293198A1
公开(公告)日：2021-09-23
申请号：US17340421
申请日：2021-06-07
Applicant: DENSO CORPORATION
Inventor： Makoto TANAKA , Masatake WADA
Abstract: A control device includes a drive unit configured to supply electric power to a fuel injection valve to perform valve open drive to supply fuel to a combustion chamber of an internal combustion engine; and a correction unit configured to correct a fuel injection amount of the fuel injection valve. The correction unit is configured to learn the fuel injection amount of the fuel injection valve when NOx purge is performed to reduce and purify the NOx occlusion catalyst.
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公开(公告)号：US20180057011A1
公开(公告)日：2018-03-01
申请号：US15686684
申请日：2017-08-25
Applicant: DENSO CORPORATION
Inventor： Kenji SOGO , Takashi NAOI , Makoto TANAKA , Kazutoshi SHIOMI , Ichiro AKAHORI
IPC: B60W50/00
CPC classification number: B60W50/00 , B60L15/007 , B60L2270/147 , H02M1/44
Abstract: An in-vehicle apparatus is provided which is installed in a vehicle including a power supply. The apparatus includes at least one drive circuit that is driven by DC voltage supplied from the power supply, and a positive electrode side line that electrically connects a positive electrode terminal of the power supply and a high-electric potential side electrical path of the drive circuit. A negative electrode terminal of the power supply and a low-electric potential side electrical path of the drive circuit are electrically connected to a body ground of the vehicle. The apparatus includes an auxiliary line that has a first end electrically connected to the positive electrode terminal or the negative electrode terminal and a second end connected to the high-electric potential side electrical path or the body ground, and that is arranged along the positive electrode side line or the body ground.
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公开(公告)号：US20160237935A1
公开(公告)日：2016-08-18
申请号：US15030442
申请日：2015-02-03
Applicant: DENSO CORPORATION
Inventor： Makoto TANAKA , Hiroaki NAGATOMO
CPC classification number: F02D41/20 , F02D41/247 , F02D41/402 , F02D2041/2055 , F02D2200/0614 , F02M45/12
Abstract: A fuel injection control unit includes an injection amount detector and a correction unit. When implementing partial lift injection where a valve closing operation is started after the valve body starts a valve opening operation and before a valve body reaches a maximum valve open position, the injection amount detector detects a physical quantity (valve closing timing) having a correlation with an injection amount. When implementing the partial lift injection, the correction unit corrects an energization time of a fuel injection valve on the basis of a detection value (learning value) that was previously detected by the injection amount detector. An energization time in a small amount region longer than a predetermined time in the partial lift injection is allowed to be corrected on the basis of a value (small amount time detection value) detected in the small amount region by the injection amount detector. On the other hand, an energization time in an extremely small amount region shorter than the predetermined time is prohibited from being corrected on the basis of the above small amount time detection value. As a result, a precision in the injection amount in the partial lift injection is improved.
Abstract translation: 燃料喷射控制单元包括喷射量检测器和校正单元。 当在阀体开始开阀操作之后并且在阀体达到最大阀打开位置之前，当执行阀关闭操作的部分升程喷射时，喷射量检测器检测与具有相关性的物理量（阀闭合正时） 注射量。 在实施部分提升注入时，校正单元基于先前由喷射量检测器检测到的检测值（学习值）来校正燃料喷射阀的通电时间。 基于通过喷射量检测器在小量区域中检测到的值（小量时间检测值），允许在局部提升喷射中长于预定时间的少量区域中的通电时间被校正。 另一方面，基于上述小量时间检测值，禁止在比规定时间短的极小区域的通电时间进行修正。 结果，提高了部分提升喷射中的喷射量的精度。
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公开(公告)号：US20210017924A1
公开(公告)日：2021-01-21
申请号：US17062953
申请日：2020-10-05
Applicant: DENSO CORPORATION
Inventor： Makoto TANAKA , Masatake WADA
Abstract: An air-fuel ratio control device sets a target air-fuel ratio and performs an air-fuel ratio control based on the target air-fuel ratio for an engine of a spark ignition type. The air-fuel ratio control device includes a lean combustion determination unit that determines whether a lean combustion is performed in the engine at the target air-fuel ratio, the target air-fuel ratio being set leaner than the theoretical air-fuel ratio; a target NOx setting unit that sets a target NOx concentration according to an operation state of the engine; an acquisition unit that acquires an actual NOx concentration detected by using a NOx concentration detection unit in an exhaust passage of the engine; and a correction unit that corrects the target air-fuel ratio based on the target NOx concentration and the actual NOx concentration when determination is made that lean combustion is performed.
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Patent Agency Ranking
公开(公告)号：US20180230924A1
公开(公告)日：2018-08-16
申请号：US15751272
申请日：2016-08-25
Applicant: DENSO CORPORATION
Inventor： Makoto TANAKA , Syohei FUJITA
CPC classification number: F02D41/20 , F02D41/34 , F02D41/36 , F02D41/40 , F02D45/00 , F02D2041/1433 , F02D2041/2055 , F02D2041/2058 , F02D2200/0618 , F02M51/00 , F02M51/06 , F02M51/061 , F02M51/0675 , F02M61/10 , F16K31/0627 , Y02T10/44
Abstract: An injection control device controls a fuel injection valve driven by an electric power. The injection control device includes a current detection unit to detect a driving current supplied to a solenoid of the fuel injection valve, an identification unit to identify a theoretical model of the driving current in a state where a movable core moved by an electromagnetic force generated by the solenoid is at rest, and a state detection unit to detect a state of the movable core. The state detection unit detects the state of the movable core, based on a deviation between the driving current detected by the current detection unit and the theoretical model.
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公开(公告)号：US20180209373A1
公开(公告)日：2018-07-26
申请号：US15745465
申请日：2016-06-14
Applicant: DENSO CORPORATION
Inventor： Naoki YOSHIUME , Makoto TANAKA , Keisuke YANOTO , Kosuke NAKANO
Abstract: A control device for controlling a fuel injection in an internal combustion engine provided with a fuel injection valve has a driving portion supplying an electric power to a terminal of the fuel injection valve so as to drive the fuel injection valve to be opened; a current detecting portion detecting a drive current flowing through the fuel injection valve when the fuel injection valve is driven to be opened; a voltage detecting portion detecting a terminal voltage of the terminal of the fuel injection valve; a correction portion correcting the electric power supplied by the driving portion so that an actual value of the drive current detected by the current detecting portion agrees with a target value; a valve close detecting portion detecting a valve closing timing of the fuel injection valve based on the terminal voltage detected by the voltage detecting portion in a condition where the electric power supplied by the driving portion is corrected by the correction portion.
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公开(公告)号：US20130159954A1
公开(公告)日：2013-06-20
申请号：US13705229
申请日：2012-12-05
Applicant: DENSO CORPORATION
Inventor： Masashi INAGAKI , Kouji ICHIKAWA , Makoto TANAKA , Hideki KASHIWAGI
IPC: G06F17/50
CPC classification number: G06F17/5081 , G06F17/5077 , G06F2217/82
Abstract: A design method of on-board wiring for a designed circuit includes determining a severity as a crosstalk prevention index for a pair of wires based on a generated noise level of a damaging side wire and a permissible noise level of a damaged side wire. The pair of wires is then assigned a severity class (SC) based on the severity determined. The SC is a pre-defined value range(s) for severity classification. Based on a preset SC specific permissible value list, one or more by-design permissible values belonging to the SC is generated for a design element of the pair of wires. A layout of the pair of wires on a board is constructed based on the by-design permissible value.
Abstract translation: 基于设计电路的车载布线的设计方法，包括基于损坏的侧线的产生的噪声电平和损坏的侧线的容许噪声电平，确定作为一对导线的串扰防止指标的严重性。 然后根据确定的严重程度，分配一对电线的严重等级（SC）。 SC是严重性分类的预定义值范围。 基于预设的SC特定允许值列表，为一对导线的设计元件生成属于SC的一个或多个设计旁容许值。 电路板上的一对导线的布局是根据设计允许值构建的。
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公开(公告)号：US20200157980A1
公开(公告)日：2020-05-21
申请号：US16751870
申请日：2020-01-24
Applicant: DENSO CORPORATION
Inventor： Masayuki NIWA , Makoto SAIZEN , Makoto TANAKA
Abstract: A fuel injection control device includes an additional energization unit. Concerning an undershoot state caused by a first energization for fuel injection, a return period is an estimated period required for a movable core to return to an initial position from a first energization. An injection interval ranges from the first energization to a second energization that is for a next fuel injection. An allowable period is obtained by subtracting a rise period estimated for the second energization from the return period. The additional energization unit adds an additional energization between the first energization and the second energization when the injection interval is longer than or equal to the allowable period and is shorter than or equal to the return period.
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公开(公告)号：US20180010546A1
公开(公告)日：2018-01-11
申请号：US15543741
申请日：2015-12-22
Applicant: DENSO CORPORATION
Inventor： Masayuki NIWA , Noritsugu KATO , Makoto TANAKA
CPC classification number: F02D41/40 , F02D41/20 , F02D2041/2003 , F02D2041/2034 , F02M45/00 , F02M51/00 , F02M51/06 , F02M51/061 , Y02T10/44
Abstract: A fuel injection valve control device controlling a fuel injection valve that injects a fuel into a combustion chamber includes an operation-condition calculation portion that calculates a fuel injection condition of the fuel injection valve based on a crank angle detected by a crank angle sensor that detects the crank angle of an engine, a current-waveform setting portion that sets a current waveform of a current supplied to the fuel injection valve on the basis of the fuel injection condition calculated by the operation-condition calculation portion, and so on. The current-waveform setting portion sets the current waveform so as to set a temporal change of a pickup current of a needle provided in the fuel injection valve to be equal to or less than a predetermined reference value when a fuel injection start timing is equal to or more than 180 degrees BTDC. The current-waveform setting portion sets the current waveform so as to set a temporal change of the pickup current of the needle to be more than the predetermined reference value when the fuel injection start timing is smaller than 180 degrees BTDC.
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