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公开(公告)号：US10260448B2
公开(公告)日：2019-04-16
申请号：US15759584
申请日：2016-09-07
Applicant: DENSO CORPORATION
Inventor： Nobuyuki Satake
IPC: B60T7/12 , F02D41/40 , F02D41/20 , F02M51/04 , F02D41/34 , F02M57/02 , F02D45/00 , F02D41/38 , F02M51/06
Abstract: An ECU includes an injection controller that performs a partial lift injection in which a fuel injection valve is drivingly opened by an injection pulse by which a lift amount of a valve body of the fuel injection valve does not reach a full lift position, a first calculation section that calculates a first parameter correlated with an amount of induced electromotive force generated by a magnetic flux change during movement of the valve body to a closed position after OFF of the injection pulse of the partial lift injection, a second calculation section that calculates, based on a time-series change of the induced electromotive force after OFF of the injection pulse of the partial lift injection, a second parameter correlated with a voltage inflection point generated with reaching of the valve body to the closed position, and a correction section that corrects a time length of the injection pulse based on the first parameter and the second parameter.
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公开(公告)号：US20150275812A1
公开(公告)日：2015-10-01
申请号：US14434838
申请日：2013-10-09
Applicant: DENSO CORPORATION
Inventor： Hideyuki Mori , Nobuyuki Satake
CPC classification number: F02D41/3082 , F02D33/003 , F02D41/20 , F02D41/2464 , F02D2041/2051 , F02D2250/31 , F02M37/0052 , F02M37/08 , F02M37/106 , F02M69/00
Abstract: A fuel supply device (1) has a valve (13) in a fuel passage between a fuel pump (3) and an engine (5). In a storage portion of an ECU (18-21) is stored a relationship between a fuel pressure and a flow rate, which are required by the engine, and voltage which is supplied to a motor (7). The ECU senses voltages V26, V27, V28 supplied to the motor from a controller (22) when the valve is opened from change points C1′, C2′, C3′ at which a characteristic between the voltage and the current which are supplied to the motor (7) is changed. Then, the ECU corrects the voltage stored in the storage portion on the basis of differences between voltages V1, V2, V5 stored in the storage portion at the change points C1, C2, C3 and the voltages V26, V27, V28 when the valve is opened. In this way, the fuel supply device can correctly control the motor in correspondence to the fuel pressure and the flow rate which are required by the engine.
Abstract translation: 燃料供给装置（1）在燃料泵（3）和发动机（5）之间的燃料通路中具有阀（13）。 在ECU（18-21）的存储部分中存储发动机所需的燃料压力和流量之间的关系以及供给到电动机（7）的电压。 当阀从变化点C1'，C2'，C3'打开时，ECU从控制器（22）感测提供给电动机的电压V26，V27，V28，在这些变化点C1'，C2'，C3'处，电压和电流之间的特性被提供给 电机（7）更换。 然后，ECU基于存储在变化点C1，C2，C3的存储部分中的电压V1，V2，V5与电压V26，V27，V28之间的差异来校正存储在存储部分中的电压，当阀门是 开了 以这种方式，燃料供应装置可以根据发动机所需的燃料压力和流量正确地控制电动机。
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Patent Agency Ranking
公开(公告)号：US10648419B2
公开(公告)日：2020-05-12
申请号：US15770319
申请日：2016-09-21
Applicant: DENSO CORPORATION
Inventor： Nobuyuki Satake
Abstract: A fuel injection control device includes an electric controller controlling an opening and closing of an injector by energizing a coil in the injector, and a booster circuit boosting a battery voltage to generate a boost voltage. The electric controller includes a valve-opening control unit applying the boost voltage and then applying the battery voltage to the coil to execute a valve-opening control to generate a required valve-opening force, an open valve maintenance control unit applying the battery voltage to the coil to execute an open valve maintenance control to generate an open valve maintenance force and is smaller the required valve-opening force, after the valve-opening control, and a current correction control unit executing a current correction control to correct a maximum value of a current flowing through the coil when the boost voltage is applied in the valve-opening control, according to a decreasing quantity of the battery voltage.
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公开(公告)号：US09920703B2
公开(公告)日：2018-03-20
申请号：US15027335
申请日：2014-10-07
Applicant: DENSO CORPORATION
Inventor： Hiroshi Katsurahara , Nobuyuki Satake
CPC classification number: F02D41/2467 , F02D41/1402 , F02D41/20 , F02D2041/1432 , F02D2041/2055
Abstract: At least after off of an injection pulse of partial lift injection, a first filtered voltage Vsm1 being a negative terminal voltage Vm of a fuel injection valve filtered by a first low-pass filter having a first frequency f1 as a cutoff frequency, the first frequency f1 being lower than a frequency of a noise component, is acquired, and a second filtered voltage Vsm2 being the negative terminal voltage Vm filtered by a second low-pass filter having a second frequency f2 as a cutoff frequency, the second frequency f2 being lower than the first frequency f1, is acquired. Time from a predetermined reference timing to a timing when a difference Vdiff (=Vsm1−Vsm2) between the filtered voltages has an inflection point is calculated as voltage inflection time Tdiff, and the injection pulse of the partial lift injection is corrected based on the voltage inflection time Tdiff.
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公开(公告)号：US10578046B2
公开(公告)日：2020-03-03
申请号：US16092831
申请日：2017-04-07
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , DENSO CORPORATION
Inventor： Nobuyuki Satake , Tomohiro Nakano
Abstract: A fuel injection control device has a detection unit, a correction value calculation unit, and a conduction time calculation unit. The detection unit detects a current increase speed that is a speed of increasing an electric current flowing in an electromagnetic coil in accordance with the start of conducting the electromagnetic coil during partial lift injection in which a valve body starts valve closing operation before the valve body reaches a maximum valve opening position after the valve body starts valve opening operation. The correction value calculation unit calculates a correction value for a requested injection quantity on the basis of the detected current increase speed. The conduction time calculation unit calculates a conduction time of the electromagnetic coil during the partial lift injection on the basis of the requested injection quantity corrected by the correction value.
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公开(公告)号：US09920704B2
公开(公告)日：2018-03-20
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.
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公开(公告)号：US09732694B2
公开(公告)日：2017-08-15
申请号：US14434838
申请日：2013-10-09
Applicant: DENSO CORPORATION
Inventor： Hideyuki Mori , Nobuyuki Satake
CPC classification number: F02D41/3082 , F02D33/003 , F02D41/20 , F02D41/2464 , F02D2041/2051 , F02D2250/31 , F02M37/0052 , F02M37/08 , F02M37/106 , F02M69/00
Abstract: A fuel supply device (1) has a valve (13) in a fuel passage between a fuel pump (3) and an engine (5). In a storage portion of an ECU (18-21) is stored a relationship between a fuel pressure and a flow rate, which are required by the engine, and voltage which is supplied to a motor (7). The ECU senses voltages V26, V27, V28 supplied to the motor from a controller (22) when the valve is opened from change points C1′, C2′, C3′ at which a characteristic between the voltage and the current which are supplied to the motor (7) is changed. Then, the ECU corrects the voltage stored in the storage portion on the basis of differences between voltages V1, V2, V5 stored in the storage portion at the change points C1, C2, C3 and the voltages V26, V27, V28 when the valve is opened. In this way, the fuel supply device can correctly control the motor in correspondence to the fuel pressure and the flow rate which are required by the engine.
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