公开(公告)号：US20190170078A1

公开(公告)日：2019-06-06

申请号：US16208634

申请日：2018-12-04

Applicant: DENSO CORPORATION

Inventor： Toshio NISHIMURA

IPC: F02D41/20 ,  H01F7/20 ,  F02D41/30

Abstract: An injection controller has a voltage applicator that applies a voltage to a driving coil of an injection valve. After a voltage is applied to the driving coil with a peak current for opening the injection valve, the voltage applicator applies a power supply voltage to the driving coil in an ON-OFF manner, to supply the driving coil with a less-than-peak current. A comparator detects whether a terminal voltage at a terminal of the coil is less than a predetermined threshold voltage. Upon detecting that the terminal voltage is less than the threshold voltage, a discharge switch applies a boosted voltage to the driving coil.

公开(公告)号：US20140069391A1

公开(公告)日：2014-03-13

申请号：US14017579

申请日：2013-09-04

Applicant: DENSO CORPORATION

Inventor： Toshio NISHIMURA ,  Takayoshi HONDA

IPC: F02D41/30

CPC classification number: F02D41/30 ,  F02D41/20 ,  F02D2041/2027 ,  F02D2041/2044 ,  F02D2041/2051 ,  F02D2041/2058 ,  F02D2041/2072

Abstract: A fuel injection controller has terminals which can be connected to the coil of the fuel injector. A first valve-open control portion supplies the valve-opening voltage to the terminals for opening the fuel injector. The first valve-open control portion stops supplying the electric supply to the coil before the fuel injector is positioned at a full-open position. Before the fuel injector is fully dosed, a small injection quantity can be obtained. A demagnetization portion forms a demagnetization circuit for demagnetizing the magnetism remaining in the coil. A normal-injection portion controls the fuel injector at full-open position.

Abstract translation: 燃料喷射控制器具有能够连接到燃料喷射器的线圈的端子。 第一阀打开控制部分将开阀电压提供给用于打开燃料喷射器的端子。 在燃料喷射器位于完全打开位置之前，第一阀打开控制部分停止向线圈供应电力。 在燃料喷射器完全喷射之前，可以获得小的喷射量。 去磁部形成用于使剩余在线圈中的磁性消磁的去磁电路。 正常喷射部分在全开位置控制燃油喷射器。

公开(公告)号：US20140069390A1

公开(公告)日：2014-03-13

申请号：US14013695

申请日：2013-08-29

Applicant: Denso Corporation

Inventor： Toshio NISHIMURA ,  Takayoshi HONDA

IPC: F02D41/30

CPC classification number: F02D41/30 ,  F02D41/20 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2041/2058

Abstract: A fuel injection controller supplies a valve-opening voltage VF1 to a fuel injector. In order to obtain a small injection quantity, the controller terminates a supply of the valve-opening voltage before the fuel injector is fully opened. A bias-control portion supplies a bias voltage to the fuel injector instead of the valve-opening voltage. A valve-close detecting portion detects a valve-closing time by detecting an inflection point on a waveform of an electric current flowing through the coil. A correction-amount computing portion computes a correction amount based on the detected valve-closing time. A correction portion corrects an electric supply period based on the correction amount.

Abstract translation: 燃料喷射控制器向燃料喷射器供应开阀电压VF1。 为了获得小的喷射量，控制器在燃料喷射器完全打开之前终止供气阀开启电压。 偏压控制部分向燃料喷射器提供偏置电压而不是开阀电压。 阀关闭检测部分通过检测流经线圈的电流的波形上的拐点来检测阀关闭时间。 校正量计算部根据检测到的关阀时间计算校正量。 修正部根据修正量来修正供电期间。

公开(公告)号：US20140069389A1

公开(公告)日：2014-03-13

申请号：US14013249

申请日：2013-08-29

Applicant: DENSO CORPORATION

Inventor： Toshio NISHIMURA

IPC: F02D41/30

CPC classification number: F02D41/30 ,  F02D41/20 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2041/2058

Abstract: A fuel injection controller is provided with a detection control portion which detects a valve-opening time. The detection control portion supplies the low valve-opening voltage to the fuel injector from a low voltage supply. An electric current flowing through a coil is gradually increased. When the fuel injector is fully opened, an inflection point appears on a waveform of an electric current. A valve-open detecting portion detects the inflection point and identifies a valve-opening time. A correction-amount computing portion computes a correction amount of a fuel injection quantity due to an error of the valve-opening time. In a succeeding fuel injection, the correction portion corrects an electric supply period. As a result, the error of the fuel injection quantity due to an error of valve-opening time is corrected.

Abstract translation: 燃料喷射控制器设置有检测开阀时间的检测控制部。 检测控制部从低电压源向燃料喷射器供给低开阀电压。 流过线圈的电流逐渐增加。 当燃料喷射器完全打开时，在电流波形上出现拐点。 阀开启检测部分检测拐点并识别开阀时间。 校正量计算部分计算由于开阀时间的误差引起的燃料喷射量的校正量。 在后续的燃料喷射中，校正部分校正供电周期。 结果，校正了由于开阀时间的误差引起的燃料喷射量的误差。

公开(公告)号：US20180156148A1

公开(公告)日：2018-06-07

申请号：US15676180

申请日：2017-08-14

Applicant: DENSO CORPORATION

Inventor： Toshio NISHIMURA

IPC: F02D41/20 ,  F02D41/04 ,  F02D41/30

CPC classification number: F02D41/20 ,  F02D41/04 ,  F02D41/30 ,  F02D2041/2006 ,  F02D2041/2017 ,  F02D2041/2024 ,  F02D2041/2058

Abstract: An injection control unit includes a constant-current control unit executing a constant current control to control a current of a coil to be in a predetermined current range lower than a peak current by allowing or interrupting a first voltage applied to the coil after the peak current starting to open an injector is applied to the coil driving the injector, and a high-voltage applying control unit applying a second voltage higher than the first voltage to the coil in a case where a condition that the current of the coil becomes lower than the predetermined current range is met when the constant-current control unit executes the constant current control.

公开(公告)号：US20150300522A1

公开(公告)日：2015-10-22

申请号：US14684481

申请日：2015-04-13

Applicant: DENSO CORPORATION

Inventor： Atsushi ITO ,  Toshio NISHIMURA ,  Takeshi AKIYOSHI

IPC: F16K31/06 ,  H01F7/06

CPC classification number: H01F7/1844 ,  F01L9/04 ,  F02D41/20 ,  F02D2041/2058 ,  H01F7/1805 ,  H01F2007/1888

Abstract: An electromagnetic-valve controller includes a control switch, a control portion regulating a supply current supplied to the electromagnetic valve by controlling a drive of the control switch and controlling to open or close the electromagnetic valve, and a current detection portion detecting the supply current. The control portion controls the drive of the control switch based on a detection result of the current detection portion. The control portion controls the drive of the control switch by using a first pulse signal having a duty ratio that is variable, in a closed period. The control portion controls the drive of the control switch by using a second pulse signal maintaining the supply current to be constant so as to maintain the electromagnetic valve to be in the fully closed state, in a closed-state maintaining period.

Abstract translation: 电磁阀控制器包括控制开关，通过控制控制开关的驱动并控制打开或关闭电磁阀来调节供给电磁阀的供给电流的控制部分和检测供应电流的电流检测部分。 控制部基于电流检测部的检测结果来控制控制开关的驱动。 控制部在闭合期间通过使用占空比为可变的第一脉冲信号来控制控制开关的驱动。 在关闭状态保持期间，控制部通过使用维持供给电流为恒定的第二脉冲信号来控制控制开关的驱动，以将电磁阀保持在完全关闭状态。

公开(公告)号：US20140034025A1

公开(公告)日：2014-02-06

申请号：US13922391

申请日：2013-06-20

Applicant: Denso Corporation

Inventor： Toshio NISHIMURA

IPC: F02M69/04

CPC classification number: F02M69/04 ,  F02D41/20 ,  F02D2041/2055 ,  F02D2041/2058

Abstract: In a fuel injection control apparatus, an injector is driven to open its valve by supplying a coil of the injector with a current during a high-level period of a power supply command signal outputted from a microcomputer. A valve-closing time of the injector is detected based on a coil current, which decreases from a fall time of the power supply command signal. By comparing the coil current with plural equally-divided comparison threshold values by comparators, times are detected when the coil current decreases to the comparison threshold values, respectively. The valve-closing time is detected based on time differences among the detected times.

Abstract translation: 在燃料喷射控制装置中，通过在从微型计算机输出的电力供给指令信号的高电平期间内向喷射器的线圈供给电流，驱动喷射器来开阀。 基于从电源指令信号的下降时间减小的线圈电流来检测喷射器的阀关闭时间。 通过比较器将线圈电流与多个等分比较阈值进行比较，当线圈电流分别降低到比较阈值时，检测时间。 基于检测时间之间的时间差检测阀关闭时间。

公开(公告)号：US20140020661A1

公开(公告)日：2014-01-23

申请号：US13939538

申请日：2013-07-11

Applicant: Denso Corporation

Inventor： Toshio NISHIMURA

IPC: F02D41/30

CPC classification number: F02D41/3005 ,  F02D41/20 ,  F02D41/2438 ,  F02D41/2467 ,  F02D2041/2058

Abstract: A fuel injection controller includes a transistor downstream of a coil of a fuel injector, two transistors applying a source voltage to an upstream of the coil, a diode refluxing an electric current to the coil from a ground, and a Zener diode provided to promptly consume the counter electromotive force generated in the coil when one of the transistors is turned OFF and the transistor is turned OFF, after an injector-drive-period of the fuel injector is terminated. When a microcomputer measures an injector current “I” decreasing from a time of the termination of an injector-drive-period, a drive control circuit delays an OFF time of the transistor relative to a time of a termination of an injector-drive-period, whereby the injector current “I” decreases gradually.

Abstract translation: 燃料喷射控制器包括在燃料喷射器的线圈下游的晶体管，将源极电压施加到线圈的上游的两个晶体管，从地面向线圈回流的二极管以及迅速消耗的齐纳二极管 在燃料喷射器的喷射器驱动周期结束之后，当晶体管中的一个截止并且晶体管截止时在线圈中产生的反电动势。 当微型计算机测量从注射器驱动周期的终止时间开始减少的喷射器电流“I”时，驱动控制电路相对于注射器驱动周期的终止时间延迟晶体管的截止时间 从而喷射器电流“I”逐渐减小。