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    • 3. 发明授权
    • Fuel injection control device for internal combustion engine
    • 内燃机燃油喷射控制装置
    • US5425343A
    • 1995-06-20
    • US182836
    • 1994-01-19
    • Motonobu AkakiYasutoshi YamadaNobuyuki OotaMasaki MitsuyasuDaisaku Sawada
    • Motonobu AkakiYasutoshi YamadaNobuyuki OotaMasaki MitsuyasuDaisaku Sawada
    • F02D41/20F02D41/40F02M51/00H01L41/04H01L41/08
    • F02D41/40F02D41/2096H02N2/062H02N2/067F02D2041/2003Y02T10/44
    • Piezoelectric element used in a fuel injection value is to be improved in its response to expansion and contraction, while the supply of an excess energy to the piezoelectric element is to be controlled. In a fuel injection control device in which an output voltage of the dc-dc converter is applied to a piezoelectric element via a choke coil and a thyristor, a current detection unit is provided between the dc-dc converter and the thyristor. A measured value of the electric charge, as found by integrating a charging current flowing through the current detection unit is compared by a comparator to a command value of electrical charges as found by processing the dc-dc converter output voltage. The results of comparison are supplied to a latch unit so as to be latched at the timing of a peak value of the charging current. A capacitor is charged and discharged depending on an output of the latch unit, and the terminal voltage across the capacitor and the output voltage of the dc-dc converter are compared to each other for controlling the output voltage of the dc-dc converter.
    • 在燃料喷射值中使用的压电元件在对膨胀和收缩的响应中将得到改善,同时控制向压电元件供应过量能量。 在其中通过扼流线圈和晶闸管将dc-dc转换器的输出电压施加到压电元件的燃料喷射控制装置中,在dc-dc转换器和晶闸管之间提供电流检测单元。 通过对流过电流检测单元的充电电流进行积分而得到的电荷的测量值通过比较器与通过处理dc-dc转换器输出电压所发现的电荷的指令值进行比较。 将比较结果提供给锁存单元,以便在充电电流的峰值的定时被锁存。 电容器根据锁存单元的输出进行充放电,将电容器两端的端子电压和dc-dc转换器的输出电压进行比较,以控制dc-dc转换器的输出电压。
    • 4. 发明授权
    • Fuel injection control device for internal combustion engine
    • 内燃机燃油喷射控制装置
    • US5477831A
    • 1995-12-26
    • US182837
    • 1994-01-19
    • Motonobu AkakiYasutoshi YamadaNobuyuki OotaMasaki MitsuyasuDaisaku Sawada
    • Motonobu AkakiYasutoshi YamadaNobuyuki OotaMasaki MitsuyasuDaisaku Sawada
    • F02D41/20F02D41/40F02M51/00H01L41/04
    • F02D41/2096F02D41/40H02N2/067F02D2041/2003Y02T10/44
    • An excess voltage applied to a piezoelectric element is detected and controlled to improve durability and reliability of the piezoelectric element. A fuel injection control device for an internal combustion engine in which a power source voltage is boosted by a dc-dc converter and the so-boosted output voltage is supplied via a first choke coil and a first thyristor to a piezoelectric element for charging the piezoelectric element, the electric charge of which is subsequently discharged via a second thyristor and a second choke coil. The fuel injection control device includes a positive voltage detection unit for detecting an excess voltage arranged between the first choke coil and the first thyristor and a positive voltage control unit controlled by an output signal of the positive voltage detection unit and adapted for shorting both ends of the first choke coil. The current through the first thyristor is cutoff to prevent the excess voltage from being applied to the piezoelectric element.
    • 检测并控制施加到压电元件的过电压,以提高压电元件的耐久性和可靠性。 一种用于内燃机的燃料喷射控制装置,其中电源电压由dc-dc转换器升压,并且如此升压的输出电压经由第一扼流线圈和第一晶闸管提供给用于对压电元件充电的压电元件 元件,其电荷随后经由第二晶闸管和第二扼流线圈放电。 燃料喷射控制装置包括:正电压检测单元,用于检测布置在第一扼流线圈和第一晶闸管之间的过电压;以及正电压控制单元,由正电压检测单元的输出信号控制,并且适于短路两端 第一个扼流圈。 通过第一晶闸管的电流被切断以防止过压被施加到压电元件。
    • 7. 发明授权
    • Gas circulation engine
    • 燃气循环引擎
    • US08453623B2
    • 2013-06-04
    • US12993396
    • 2009-05-19
    • Rentaro KurokiDaisaku SawadaShinichi Mitani
    • Rentaro KurokiDaisaku SawadaShinichi Mitani
    • F02B43/00F02B43/04
    • F02M25/10F02B43/10F02D9/02F02D9/08F02M21/00F02M25/12Y02T10/121Y02T10/14Y02T10/32
    • A gas circulation engine includes a combustion chamber to which high-pressure fuel in a first high-pressure fuel supply passage, an oxidant and working gas are supplied; a circulation path that connects an intake-side portion and an exhaust-side portion of the combustion chamber to each other; a fuel bleed-off tank into which the high-pressure fuel in the first high-pressure fuel supply passage is bled off; a fuel bleed-off valve that permits or shuts off communication between the first high-pressure fuel supply passage and the fuel bleed-off tank; and a fuel bleed-off control unit that permits communication between the first high-pressure fuel supply passage and the fuel bleed-off tank by opening the fuel bleed-off valve when the engine is stopped, the communication between the first high-pressure fuel supply passage and the fuel bleed-off tank being shut off during operation of the engine.
    • 气体循环发动机包括燃烧室,第一高压燃料供给通道中的高压燃料,氧化剂和工作气体供应到燃烧室; 将燃烧室的进气侧部分和排气侧部分彼此连接的循环路径; 第一高压燃料供给通道中的高压燃料排出的燃料排出罐; 燃料排出阀,其允许或关闭第一高压燃料供给通道和燃料排出罐之间的连通; 以及燃料排出控制单元,其通过在发动机停止时打开燃料排出阀,允许第一高压燃料供给通道和燃料排放槽之间的连通,第一高压燃料 在发动机运转期间,供油通道和燃油泄放罐被切断。