 |
This is a good waveform |
 View larger image
Secondary Ignition (Plug kV) Waveform Notes
The plug firing voltage is the voltage required to jump and bridge the gap at the plug’s electrode. Commonly known as the ‘Plug Kv’ (Kilo Volts).
The plug Kv’s will be increased by:
- Large plug gaps
- A large rotor air gap
- A break in a plug lead
- A break in the king lead
- Worn spark plugs
- A lean mixture
- Rotor to reluctor misalignment
The plug Kv’s will be decreased by:
- Small plug gaps
- Low compression
- Rich mixture
- Incorrect ignition timing
- Tracking to earth
- Fouled plugs
A high resistance in the High Tension (HT) lead or the coil lead will not alter the plug Kv (however an increase in sparkline Kv will be evident). An open circuit lead will increase both the plug Kv and the sparkline Kv.
Use different voltage ranges for different tests:
- 0 to 25 Kv for plug firing voltages and HT insulation testing.
- 0 to 50 Kv for plug firing voltages on Distributorless Ignition System (DIS) and coil output testing.
汽車診斷 | 汽車診斷儀 | 汽車故障診斷儀 | 汽車測試儀 | 汽車分析儀 | 汽車診斷示波器 | 汽車電路測試儀 | 汽車電路分析儀 | 發動機分析儀 | 發動機綜合分析儀 | 發動機檢測中心 | 點火分析儀 | 點火測試儀 | 汽車傳感器測試儀 | CAN總線示波器 | LIN總線示波器 | 汽車故障記錄儀 | 汽車傳感器分析儀 | 汽車檢測儀 | 噴油嘴測試儀 | 點火線圈測試儀 | 蓄電池測試儀 | 發電機測試儀 | 起動機測試儀 | ABS傳感器測試儀 | ECU測試儀 | ECM測試儀 | 進氣真空/壓力測試儀 | 排氣壓力測試儀 | 汽車技術培訓 | 爆震傳感器測試儀 | 缺火測試儀 | 缺缸測試儀 | 線路測試儀 | 引出線 | 汽車數字示波器 | 真空傳感器 | 高壓感應測試頭 | 無分電器點火測試頭 | 獨立點火（COP）感應測試頭 | 漏電測試儀 | 氣缸相對壓縮測試 | 電腦測試儀 | 發動機控制器測試儀 | 泄漏測試儀 | 熒光檢漏 | 超聲波檢漏 | 汽車數字萬用表 | 電流鉗表 | 電流勾表 | 點火正時燈 |
