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    • 3. 发明授权
    • Ignition apparatus for internal combustion engine
    • 内燃机点火装置
    • US5634453A
    • 1997-06-03
    • US590328
    • 1996-01-23
    • Masaaki TaruyaMitsuru Koiwa
    • Masaaki TaruyaMitsuru Koiwa
    • F02P3/04F02P9/00F02P3/05
    • F02P9/002
    • An ignition apparatus for internal combustion engine includes an ignition power unit 1A having a power transistor 14A for feeding and shutting off a primary current i1 to and from an ignition coil 13 and a control circuit 2 having a CPU 21 for calculating an ignition timing of an internal combustion engine and a feeding time of the primary current in accordance with an operating state D and outputting an ignition signal G to the power transistor, feeds and shuts off the primary current in response to an ignition signal Ga to generate a high-tension secondary voltage from the ignition coil. The power transistor has a characteristic for increasing a direct current amplifying ratio as a base to emitter voltage VBE between a base and emitter increases to suppress the rising-up of the primary current to thereby suppress a secondary voltage generated when the primary current starts to be fed. With this arrangement, the ignition apparatus for internal combustion engine can suppress malfunction when the ignition signal rises up without the use of a high-tension diode and realize cost reduction and miniaturization of the apparatus.
    • 一种用于内燃机的点火装置包括点火功率单元1A,该点火功率单元1A具有用于向和从点火线圈13供给和关闭初级电流i1的功率晶体管14A和具有用于计算点火正时的CPU 21的控制电路2 内燃机和根据工作状态D的一次电流的供电时间,并将点火信号G输出到功率晶体管,响应于点火信号Ga进给和关闭一次电流,以产生高压次级 点火线圈的电压。 功率晶体管具有增加直流放大比的特性,因为基极和发射极之间的基极到发射极电压VBE增加以抑制初级电流的上升,从而抑制当初级电流开始时产生的次级电压 喂。 通过这种布置,内燃机的点火装置可以在不使用高压二极管的情况下点燃信号上升而抑制故障,实现设备的成本降低和小型化。
    • 8. 发明授权
    • Current limiter in an ignition apparatus for an internal combustion
engine
    • 内燃机点火装置的当前限制
    • US5199407A
    • 1993-04-06
    • US769320
    • 1991-10-01
    • Nobuyuki SawazakiMasaaki TaruyaMitsuru Koiwa
    • Nobuyuki SawazakiMasaaki TaruyaMitsuru Koiwa
    • F02B1/04F02P3/05
    • F02P3/051F02B1/04
    • A current limiter in an ignition apparatus for an internal combustion engine including a differential amplifier 20 is able to limit a primary winding current of an ignition coil to a prescribed limit value which is independent of a voltage as sensed by a current sensing resistor 11, thus providing a highly stable operating characteristic. The factor of current amplification of the differential amplifier can be increased without accompanying oscillations of the current limiter. The current sensing resistor senses a voltage corresponding to a current flowing from the primary winding of the ignition coil to a power transistor 4 which turns on and off the power supply to the ignition coil. A reference voltage source 12 generates a reference voltage for comparison with the voltage sensed by the current sensing resistor. A differential amplifier absorbs a part of a base current supplied from a storage battery to a base of the power transistor on the basis of a difference between the reference voltage and the voltage sensed by the current sensing resistor. A plurality of output transistors 25, 102 are coupled to form a Darlington circuit which is connected between the differential amplifier and the base of the power transistor. Another reference voltage source 12" may be provided for generating a second reference voltage, the second reference voltage source being connected between the current sensing resistor and the second input terminal of the differential amplifier for supplying thereto a total sum of the voltage sensed by the current sensing resistor and the second reference voltage.
    • 在具有差分放大器20的内燃机用点火装置中的限流器能够将点火线圈的初级绕组电流限制为与由电流检测电阻器11感测到的电压无关的规定极限值,因此 提供高度稳定的工作特性。 差分放大器的电流放大因子可以增加,而不伴随限流器的振荡。 电流感测电阻器检测对应于从点火线圈的初级绕组流过的电流的电压到接通和断开对点火线圈的电源的功率晶体管4。 参考电压源12产生用于与由电流感测电阻器感测的电压进行比较的参考电压。 差分放大器基于参考电压和由电流感测电阻感测的电压之间的差异,吸收从蓄电池提供给功率晶体管的基极的一部分基极电流。 多个输出晶体管25,102被耦合以形成连接在功率晶体管的差分放大器和基极之间的达林顿电路。 可以提供另一参考电压源12“用于产生第二参考电压,第二参考电压源连接在差动放大器的电流检测电阻和第二输入端之间,用于向其提供由 电流检测电阻和第二参考电压。
    • 10. 发明授权
    • Ignition detection circuit
    • 点火检测电路
    • US5722378A
    • 1998-03-03
    • US719882
    • 1996-09-25
    • Nobuyuki SawazakiMasaaki TaruyaMitsuru Koiwa
    • Nobuyuki SawazakiMasaaki TaruyaMitsuru Koiwa
    • F02P3/045F02P3/055F02P17/12
    • F02P17/12
    • An ignition circuit IG converts a battery voltage into a high spark plug discharge voltage. A resistor R1 inserted into the power supply path L detects the current flowing through the ignition circuit by converting the current into a voltage, and a level shift circuit LS shifts the potential level at both terminals of the detection resistor. A level deviation detection circuit regulates the level of a deviation voltage developed across the detection resistor, which is caused when an electric current flows from the battery to the ignition circuit, and outputs the deviation voltage. A reference voltage generation portion sets a reference voltage to be compared with the deviation voltage by a comparator COM. A clamping circuit CL suppresses variations in the power supply voltage corresponding to the level deviation detection circuit and the comparator, and protects the level deviation detection circuit. Thus, the influence of a surge voltage exerted on the comparator embodied in a monolithic IC is greatly reduced. Moreover, the accuracy in detecting a load current at the time of engine ignition is enhanced.
    • 点火电路IG将电池电压转换成高火花塞放电电压。 插入电源路径L的电阻R1通过将电流转换为电压来检测流过点火电路的电流,电平移位电路LS使检测电阻的两端的电位移位。 电平偏差检测电路调节当电流从电池流向点火电路时引起的检测电阻器两端产生的偏差电压的电平,并输出偏差电压。 参考电压产生部分通过比较器COM设置与偏差电压进行比较的参考电压。 钳位电路CL抑制与电平偏差检测电路和比较器相对应的电源电压的变化,并且保护电平偏差检测电路。 因此,大大降低了施加在单片IC上体现的比较器上的浪涌电压的影响。 此外,提高了在发动机点火时检测负载电流的精度。