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公开(公告)号：US20190203687A1
公开(公告)日：2019-07-04
申请号：US16293734
申请日：2019-03-06
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
CPC classification number: F02M65/005 , B05B12/004 , B05B12/02 , F02D41/20 , F02D41/34 , F02D41/40 , F02D41/401 , F02D2200/0618 , F02M51/00 , F02M51/06 , F02M51/061 , F02M61/10 , F02M65/00
Abstract: An ECU as a valve body operation estimation device includes a sampling unit that obtains at least one of voltage and current of the electromagnetic coil as sample values at intervals of a predetermined time in a sampling period set based on a predetermined reference timing, a variation calculation unit that calculates a degree of variation of the sample values obtained in the sampling period, a variation waveform which represents a change of the degree of variation caused by shifting the reference timing including a point at which the degree of variation reduces and then rises as the reference timing is delayed, the point referred to as a rising start point, and a timing estimation unit that estimates an operation timing of a valve body based on the reference timing at the rising start point.
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公开(公告)号：US20180328305A1
公开(公告)日：2018-11-15
申请号：US15775883
申请日：2016-11-29
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
CPC classification number: F02D41/2467 , F02D41/20 , F02D41/3005 , F02D41/34 , F02D2041/2055 , F02D2041/2058 , F02D2200/0614 , F02M51/00 , F02M51/06 , F02M51/061 , F02M61/10
Abstract: A control device that is to output a driving signal to a fuel injector includes a full-lifting valve-closing response acquisition unit to acquire a full-lifting valve-closing profile indicating a valve-closing behavior of the fuel injector from a full-lifting state of a valve body constituting the fuel injector, based on a behavior of an electric signal from the full-lifting state to a closing state of the valve body, and a valve-opening response estimation unit to estimate a valve-opening profile indicating a valve-opening behavior when a valve-opening driving signal is input to the fuel injector, based on at least the full-lifting valve-closing profile.
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公开(公告)号：US20140261300A1
公开(公告)日：2014-09-18
申请号：US14211647
申请日：2014-03-14
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
IPC: F02D41/30
CPC classification number: F02D41/064 , F02D19/061 , F02D19/0628 , F02D19/084 , F02D19/087 , F02D37/02 , F02D41/0025 , F02D41/401 , F02D2200/021 , F02D2200/0611 , Y02T10/36
Abstract: A fuel injection control apparatus for an internal combustion engine includes a fuel injection valve and an ignition device. The fuel injection control apparatus further includes a determination unit and an injection control unit. The determination unit determines that an implementation condition is satisfied and the injection control unit controls the fuel injection valve. The injection control unit controls the fuel injection valve to (i) begin injecting fuel during a compression stroke of the engine and (ii) complete injecting fuel at an injection completion timing according to an ignition timing of the ignition device, during start period after the engine is started, when the implementation condition is satisfied.
Abstract translation: 一种用于内燃机的燃料喷射控制装置，包括燃料喷射阀和点火装置。 燃料喷射控制装置还包括确定单元和喷射控制单元。 确定单元确定满足实施条件，并且喷射控制单元控制燃料喷射阀。 喷射控制单元控制燃料喷射阀以（i）在发动机的压缩行程期间开始喷射燃料，以及（ii）在点火装置的点火正时之后，在喷射完成时刻完成喷射燃料， 引擎启动时，执行条件满足时。
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公开(公告)号：US20180149124A1
公开(公告)日：2018-05-31
申请号：US15568248
申请日：2016-03-30
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
CPC classification number: F02M51/061 , F02D41/1401 , F02D41/20 , F02D41/2425 , F02D41/247 , F02D41/40 , F02D2041/1432 , F02D2041/2048 , F02D2041/389 , F02D2200/063 , Y02T10/44
Abstract: An ECU as a fuel injection control device includes: an injector control part that energizes a magnetic circuit of a fuel injector by a specified injection pulse to thereby open the fuel injector and that energizes the magnetic circuit by a specified energization pulse within a range in which a needle valve of the fuel injector is not driven; and a storage part that stores information relating to a behavior of a drive voltage (minus terminal voltage) of the fuel injector when the magnetic circuit is energized by the injector control part by the specified energization pulse.
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公开(公告)号：US20170191437A1
公开(公告)日：2017-07-06
申请号：US15314121
申请日：2015-04-27
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
IPC: F02D41/20
CPC classification number: F02D41/20 , F02D2041/2003 , F02D2041/2034 , F02D2041/2044 , F02D2041/2058
Abstract: An ECU, which applies a predetermined high voltage for valve-opening operation and subsequently applies a predetermined low voltage to maintain the valve-opening and thus energizes a fuel injector for fuel injection by the fuel injector, includes a current detection section that detects an energizing current flowing through the fuel injector, a drive IC that, after start of energization of the fuel injector, when a detection current detected by the current detection section arrives at a beforehand determined target peak value, switches the voltage applied to the fuel injector from the high voltage to the low voltage, and a microcomputer that calculates a slope of change in current in the detection current while the high voltage is applied to the fuel injector, and performs correction processing to correct shift of a peak point of an actual current flowing through the fuel injector based on the slope of change in current.
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Patent Agency Ranking
公开(公告)号：US20160252035A1
公开(公告)日：2016-09-01
申请号：US15027334
申请日：2014-10-07
Applicant: DENSO CORPORATION
Inventor： Hiroshi KATSURAHARA , Nobuyuki SATAKE , Keisuke YANOTO
CPC classification number: F02D41/247 , F02D41/1402 , F02D41/20 , F02D41/2467 , F02D2041/1432 , F02D2041/2051 , F02D2041/2055 , F02D2200/0616
Abstract: At least after off of an injection pulse of partial lift injection, a difference between a first filtered voltage being a negative terminal voltage of a fuel injection valve filtered by a first low-pass filter and a second filtered voltage being the terminal voltage filtered by a second low-pass filter is calculated, and time from a predetermined reference timing to a timing when the difference between the filtered voltages has an inflection point is calculated as voltage inflection time. Subsequently, an injection quantity corresponding to current voltage inflection time is estimated for each of injection pulse widths with a relationship between the voltage inflection time and the injection quantity, the relationship being beforehand stored for each of the injection pulse widths. A map defining the relationship between the injection pulse width and the injection quantity is created based on a result of such estimation, and a required injection pulse width corresponding to a required injection quantity is calculated using the map.
Abstract translation: 至少在部分提升喷射的喷射脉冲关闭之后，作为由第一低通滤波器滤波的燃料喷射阀的负端电压的第一滤波电压与作为由第一低通滤波器滤波的端电压的第二滤波电压之间的差 计算第二低通滤波器，并且计算从预定基准定时到滤波电压之间的差具有拐点的定时的时间作为电压拐点时间。 随后，对于每个喷射脉冲宽度，估计与电压拐点时间和喷射量之间的关系，对于每个喷射脉冲宽度，预先存储关于当前电压拐点时间的喷射量。 基于这种估计的结果，创建定义喷射脉冲宽度和喷射量之间的关系的图，并且使用该图来计算与所需喷射量相对应的所需喷射脉冲宽度。
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公开(公告)号：US20220403795A1
公开(公告)日：2022-12-22
申请号：US17893603
申请日：2022-08-23
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO , Takayuki MAKIHARA , Hatsumi TAKEUCHI , Tomoya TAKEUCHI , Haruki SUZUKI
Abstract: A fuel injection control device is applied to an internal combustion engine including a fuel injection valve and causes a valve body to be in a valve open state accompanying an energization of the fuel injection valve to inject fuel. The fuel injection control device acquires a dynamic parameter. The fuel injection control device acquires an injection amount parameter. The fuel injection control device calculates, based on the dynamic parameter, a dynamic correction value. The fuel injection control device calculates, based on the injection amount parameter, an injection amount correction value. The fuel injection control device corrects a fuel injection using the dynamic correction value and the injection amount correction value.
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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：US20140299103A1
公开(公告)日：2014-10-09
申请号：US14222933
申请日：2014-03-24
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
CPC classification number: F02D41/0025 , F02D19/084 , F02D41/064 , F02D41/1401 , F02D41/3845 , F02D2041/141 , F02D2200/021 , F02D2200/0602 , F02D2200/0611 , F02D2200/0614 , F02D2250/31 , Y02T10/36
Abstract: A fuel injection control device includes a fuel injection control unit and a pump control unit. The fuel injection control unit controls a fuel injection amount of a fuel injection valve. The pump control unit calculates a pump control amount based on feedforward and feedback terms and controls a fuel pump based on the pump control amount. The fuel injection control unit includes a first injection control unit for performing fuel injection by the valve at a starting injection amount in a starting period after commencement of starting of an engine by its starting unit until a predetermined rotation increase of the engine is produced in association with fuel combustion. The pump control unit includes a starting control unit for calculating the feedforward term based on the starting injection amount in the starting period and for calculating the pump control amount using this feedforward term.
Abstract translation: 燃料喷射控制装置包括燃料喷射控制单元和泵控制单元。 燃料喷射控制单元控制燃料喷射阀的燃料喷射量。 泵控制单元基于前馈和反馈项计算泵控制量，并且基于泵控制量来控制燃料泵。 燃料喷射控制单元包括：第一喷射控制单元，用于在起动单元启动发动机之后的起动期间以起动喷射量执行燃料喷射，直到产生发动机的预定旋转增加为止 燃油燃烧。 泵控制单元包括起动控制单元，用于基于起动时段中的起动喷射量来计算前馈项，并且使用该前馈项来计算泵控制量。
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公开(公告)号：US20210079878A1
公开(公告)日：2021-03-18
申请号：US17104784
申请日：2020-11-25
Applicant: DENSO CORPORATION
Inventor： Keisuke YANOTO
Abstract: A control device controls a drive current that flows through a drive coil of a fuel injection valve that is electromagnetically driven. A control device includes a determination unit configured to determine whether a supply fuel pressure, which is a pressure of fuel supplied to the fuel injection valve, is higher than a determination pressure at which the fuel pressure is determined abnormally high; a first control unit configured to control the drive current in a first mode when the determination unit determines that the supply fuel pressure is not higher than the determination pressure; and a second control unit configured to control the drive current in a second mode that facilitates maintaining of the fuel injection valve in an open state more than in the first mode when the determination unit determines that the supply fuel pressure is higher than the determination pressure.
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