JPS63141842U

JPS63141842U -

Info

Publication number: JPS63141842U
Application number: JP3376387U
Authority: JP
Priority date: 1987-03-10
Filing date: 1987-03-10
Publication date: 1988-09-19

Description

[Brief explanation of the drawing]

第１図は、本考案の不良、良好、過多方式の原
理図、第２図は、不良時の波形と基準値の関係図
、第３図は、良好時の波形と基準値の関係図、第
４図は、過多時の波形の基準値の関係図ですが、
横軸は時間、縦軸は直流電圧です。なお、Ｌは点
火栓に接続する電線、Ｐは点火栓、Ｅは車体のア
ース、ＣＴは鉄心に巻線を施した変流器、ＡＭＰ
はＩＣ増幅器、Ｒ１，Ｒ２は固定抵抗器、ＶＲ１
，ＶＲ２は可変抵抗器で、Ｒ１とＶＲ１でＡ基準
値を作ります。またＲ２とＶＲ２でＢ基準値を作
ります。ＣＡ１はＡ部系ＩＣ比較増幅器、ＣＡ２
はＢ部系ＩＣ比較増幅器、ＰＬ１，ＰＬ２は発光
ダイオード、ＯＳ１，ＯＳ２は発音させるための
発振器、ＳＰはスピーカーです。Ａは、不良と良
好状況を知る基準値、Ｂは良好と過多状況を知る
基準値、Ｃ１，Ｃ２，Ｃ３は共に点火時に流れた
電流をＣＴで変流され、増幅器で増幅された波形
です。 Fig. 1 is a diagram of the principle of the defective, good, and excessive methods of the present invention; Fig. 2 is a diagram of the relationship between the waveform and the reference value in the case of a defect; and Figure 3 is a diagram of the relationship between the waveform and the reference value in the case of a good condition. Figure 4 is a diagram showing the relationship between the reference values of the waveform when there is an excess.
The horizontal axis is time and the vertical axis is DC voltage. In addition, L is the electric wire connected to the spark plug, P is the spark plug, E is the ground of the car body, CT is the current transformer with a wire wound around the iron core, and AMP
is an IC amplifier, R1 and R2 are fixed resistors, VR1
, VR2 is a variable resistor, and R1 and VR1 create the A reference value. Also, create the B reference value with R2 and VR2. CA1 is A section IC comparison amplifier, CA2
is the B section IC comparison amplifier, PL1 and PL2 are light emitting diodes, OS1 and OS2 are oscillators for generating sound, and SP is a speaker. A is a reference value to know whether the condition is bad or good, B is a reference value to know good or excessive condition, and C1, C2, and C3 are the waveforms of the current that flowed at the time of ignition, transformed by CT and amplified by an amplifier.

Claims

[Scope of utility model registration request]

When an engine's spark plug is ignited, magnetism is generated in proportion to the electric current flowing from the wire connected to the spark plug. Because the magnetism is so small, a wire-wound iron core surrounds the wires connected to the spark plug. This is a type of current transformer, but a voltage is induced at both ends of the iron core. This is so small that it is amplified. Next, the amplified value is compared with several kinds of reference values set in advance using each IC comparator. The result is an indicator that determines the ignition status of the ignition plug using light and various sounds according to the output from the light emitting diode and sound generator connected to the comparator.