• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an apparatus for detecting a misfire state of a vehicle igniter, the secondary side voltage sensing unit for sensing and outputting a voltage induced in a secondary coil of an ignition coil, a reference voltage generation unit for generating a reference voltage, and the voltage sensing unit. A comparator for comparing the voltage sensed by the reference voltage generated by the reference voltage generator and outputting a voltage signal having a 'high' level if the detected voltage is greater than a reference voltage, and the voltage signal having the 'high' level. The electronic control unit is configured to measure the duration of time and to determine the normal ignition state if the measured time is more than the reference time, and to determine the misfire state if the measured time is less than the reference time. By directly detecting a case where a problem occurs on the secondary side, the misfire state can be detected more accurately.
    公开号:KR20020047547A
    申请号:KR1020000076029
    申请日:2000-12-13
    公开日:2002-06-22
    发明作者:박진석
    申请人:이계안；현대자동차주식회사；류정열；기아자동차주식회사；
    IPC主号:
    专利说明:

    A device for sensing ignition state of an igniter
    [9] The present invention relates to a misfire state sensing device of a vehicular igniter, and more particularly, to a misfire state detection apparatus of a vehicular igniter for detecting a misfire due to a problem occurring in the secondary side of the ignition coil.
    [10] In general, in gasoline engines, sparks are generated by an igniter in a mixing compressor compressed by a piston to give ignition energy to burn the mixing compressor to obtain an output.
    [11] 1 is a circuit diagram of a vehicle igniter equipped with a misfire state detection apparatus according to the prior art, the ignition coil 10 consisting of a primary coil 11 and a secondary coil 12, a buffer 20, and a power transistor ( 30) and the failure diagnosis monitor 40 is configured. In addition, reference numeral 'C' shown in FIG. 1 denotes a stable capacitor, and reference numeral 'ZD' denotes a zener diode for counter electromotive force regeneration.
    [12] The power transistor 30 receives the ignition control signal output from the electronic control unit (not shown) to the base terminal through the buffer 20 to perform a switching operation, thereby supplying / blocking power to the primary coil 11 to enable an igniter. To generate an ignition spark.
    [13] Then, the failure diagnosis monitor 40 detects the amount of current flowing through the primary coil 11 and determines whether the battery is shorted to the battery, ground to the ground, or the wire is broken, and transmits such a failure situation to the electronic control unit. In addition, the width of the ignition control signal applied to the base end of the power transistor 30 is measured and transmitted to the electronic control unit again.
    [14] However, in the prior art as described above, the vehicle igniter can diagnose this when a problem occurs on the primary side of the ignition coil and is misfired. There was no problem.
    [15] In particular, the signal that actually influences the ignition is a voltage induced on the secondary side of the ignition coil, and there is a problem in that a direct failure diagnosis cannot be performed due to failure diagnosis based on this voltage.
    [16] Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, a vehicle igniter that can detect the misfire state more accurately by directly detecting the case of a misfire caused by a problem on the secondary side of the ignition coil The purpose is to provide a misfire state detection device of.
    [17] The misfire state detection apparatus for a vehicle igniter according to the present invention for achieving the above object, the secondary voltage detection unit for detecting and outputting a voltage induced in the secondary coil of the ignition coil, and the reference for generating a reference voltage A comparator for comparing the voltage sensed by the voltage detector and the voltage sensed by the voltage detector and outputting a high voltage signal when the detected voltage is greater than the reference voltage; The electronic control unit measures the duration of the voltage signal of the 'high' level, and if the measured time is greater than or equal to the reference time, determines the normal ignition state and if the measured time is less than the reference time, Characterized in that configured to include.
    [18] In addition, the secondary voltage sensing unit is configured to sense a voltage of the primary coil which varies according to the voltage induced in the secondary coil of the ignition coil, and the secondary voltage sensing unit and the reference voltage generation unit are overcurrent and / or A protective circuit for protecting a circuit from an overvoltage is provided, respectively.
    [1] 1 is a circuit diagram of a vehicle igniter equipped with a misfire state detection apparatus according to the prior art,
    [2] 2 is a circuit diagram of a vehicle igniter equipped with a misfire state detection apparatus according to the present invention;
    [3] 3 is a spark duration time graph in a normal ignition state,
    [4] 4 is a spark duration time graph in a misfire state.
    [5] <Explanation of symbols for the main parts of the drawings>
    [6] 50: secondary voltage detection unit 51: protection circuit
    [7] 60: reference voltage generation unit 61: protection circuit
    [8] 70: comparator
    [19] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
    [20] FIG. 2 is a circuit diagram of a vehicle igniter equipped with a misfire state detecting apparatus according to the present invention. The same reference numerals are used for the same components as those of FIG. 1, and description thereof will be omitted.
    [21] In FIG. 2, the secondary voltage detecting unit 50 measures the voltage of the primary coil 11 that varies according to the voltage induced in the secondary coil 12 of the ignition coil 10 to measure the measured voltage Vign. ) Is inputted to the non-inverting terminal (+) of the comparator 70. The voltage of the primary coil 11 is divided to input the measured voltage Vign to the non-inverting terminal (+) of the comparator 70. And voltage divider resistors R2 and R3, and a protection circuit 51 for protecting the circuit from overcurrent and overvoltage.
    [22] The protection circuit 51 includes an overcurrent preventing resistor R1, a zener diode ZD1 for preventing overvoltage, and stabilizing diodes D1 and D2 (for reverse connection prevention).
    [23] In addition, the reference voltage generator 60 generates a reference voltage Vth and inputs it to the inverting terminal (-) of the comparator 70. The reference voltage generator 60 divides the voltage Vcc and compares the reference voltage Vth with a comparator ( The voltage divider resistors R5 and R6 input to the inverting terminal (-) of the terminal 70 and a protection circuit 61 for protecting the circuit from overcurrent are comprised.
    [24] The protection circuit 61 includes an overcurrent prevention resistor R4 and a stabilizing diode D3 (for reverse connection prevention).
    [25] The comparator 70 receives the measured voltage Vign as the non-inverting terminal (+) as described above, and receives the reference voltage Vth as the inverting terminal (-) as described above, and measures the measured voltage Vign. ) Is higher than the reference voltage (Vth) outputs a 'high' level voltage signal to the electronic control unit (not shown), and if the measured voltage (Vign) is smaller than the reference voltage (Vth), It is output to the electronic control unit shown.
    [26] In addition, the electronic control unit receives the voltage signal from the comparator 70 as described above, and measures the time for which the voltage signal is maintained at the 'high' level, and the time T (spark duration time; spark duration) measured as described above. time and a preset reference time Tth, and when the measured time T is greater than or equal to the reference time Tth, it is determined to be a normal ignition state, and the measured time T is the reference time Tth. Less than), it is determined to be a misfire state.
    [27] The operation and effects of the misfire state detection device for a vehicle igniter according to the present invention configured as described above will be described with reference to FIGS. 3 and 4.
    [28] First, the secondary voltage sensing unit 50 measures the voltage induced in the secondary coil 12 of the ignition coil 10 and inputs the measured voltage Vign to the non-inverting terminal (+) of the comparator 70. The reference voltage generator 60 generates a reference voltage Vth and inputs the reference voltage to the inverting terminal (-) of the comparator 70.
    [29] The comparator 70 compares the measured voltage Vign and the reference voltage Vth and outputs a voltage signal having a 'high' level to the electronic control unit when the measured voltage Vign is greater than the reference voltage Vth. If the measured voltage Vign is smaller than the reference voltage Vth, a voltage signal having a 'low' level is output to an electronic control unit (not shown).
    [30] In addition, the electronic control unit receives the voltage signal from the comparator 70 as described above and measures the time for which the voltage signal is maintained at the 'high' level, and the time T (spark duration time; spark duration) measured as described above. time and a preset reference time Tth, and when the measured time T is greater than or equal to the reference time Tth, it is determined to be a normal ignition state, and the measured time T is the reference time Tth. Less than), it is determined to be a misfire state.
    [31] That is, as shown in FIG. 3, when the spark duration time T is greater than or equal to a preset reference time Tth, it may be determined that the spark propagation time has been normally performed. As shown in FIG. 4, the spark duration time is shown. If (T) is smaller than the preset reference time Tth, it can be determined that discharge has been performed within a very short time, and it can be determined whether it is a normal ignition state or a misfire state.
    [32] As described above, according to the present invention, a misfire state can be detected more accurately by directly detecting a case where a problem occurs on the secondary side of the ignition coil based on the voltage induced in the secondary coil of the ignition coil. It works.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] A secondary voltage detector for sensing and outputting a voltage induced in the secondary coil of the ignition coil, a reference voltage generator for generating a reference voltage, a voltage detected by the voltage detector, and generated by the reference voltage generator A comparator for outputting a voltage signal having a 'high' level when the detected voltage is greater than the reference voltage by comparing the reference voltage, and measuring a time duration of the voltage signal at the 'high' level, and measuring the time An apparatus for detecting a misfire state of a vehicular igniter comprising an electronic control unit for determining that it is a normal ignition state if the time is longer than the reference time, and determining the misfire state if the measured time is less than the reference time.
    [2" claim-type="Currently amended] The method of claim 1,
    The secondary side voltage detection unit, the misfire state detection device for a vehicle igniter, characterized in that for detecting the voltage of the primary coil that varies according to the voltage induced in the secondary coil of the ignition coil.
    [3" claim-type="Currently amended] The method according to claim 1 or 2,
    And the secondary voltage detecting unit and the reference voltage generating unit each include a protection circuit for protecting the circuit from overcurrent and / or overvoltage.
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    同族专利:
    公开号 | 公开日
    KR100372436B1|2003-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-12-13|Application filed by 이계안, 현대자동차주식회사, 류정열, 기아자동차주식회사
    2000-12-13|Priority to KR20000076029A
    2002-06-22|Publication of KR20020047547A
    2003-02-15|Application granted
    2003-02-15|Publication of KR100372436B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR20000076029A|KR100372436B1|2000-12-13|2000-12-13|A device for sensing ignition state of an igniter|
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