行业组件数据 · 2026

点火电缆

High-voltage cable transmitting electrical energy from ignition coil to spark plugs in combustion engines.

技术定义与适配语境
典型 点火电缆 会按材料、尺寸公差、适配关系和失效风险在 汽车制造 中评估。

An ignition cable, also known as a spark plug wire or high-tension lead, is a specialized electrical conductor designed to carry high-voltage pulses from the ignition coil or distributor to the spark plugs in internal combustion engines. It consists of a conductive core (typically carbon-impregnated fiberglass, copper, or stainless steel strands) surrounded by multiple layers of insulation (silicone rubber, EPDM, or other high-temperature polymers) and protective sheathing to prevent electrical leakage, electromagnetic interference, and environmental damage. The cable must maintain precise electrical resistance (typically 1,000-50,000 ohms per meter) to ensure proper spark timing and energy delivery while suppressing radio frequency interference (RFI).

组件规格

定义
An ignition cable, also known as a spark plug wire or high-tension lead, is a specialized electrical conductor designed to carry high-voltage pulses from the ignition coil or distributor to the spark plugs in internal combustion engines. It consists of a conductive core (typically carbon-impregnated fiberglass, copper, or stainless steel strands) surrounded by multiple layers of insulation (silicone rubber, EPDM, or other high-temperature polymers) and protective sheathing to prevent electrical leakage, electromagnetic interference, and environmental damage. The cable must maintain precise electrical resistance (typically 1,000-50,000 ohms per meter) to ensure proper spark timing and energy delivery while suppressing radio frequency interference (RFI).
工作原理
The ignition cable operates on the principle of high-voltage pulse transmission through a controlled-resistance conductor. When the ignition system generates a high-voltage pulse (typically 5,000-40,000 volts), the cable's conductive core carries this energy to the spark plug. The cable's specific resistance (ohms per meter) helps shape the voltage waveform, ensuring optimal spark duration and intensity while suppressing electromagnetic interference that could disrupt engine electronics. The multiple insulation layers prevent voltage leakage to ground and protect against heat, vibration, chemicals, and moisture.
材料
Conductive core: Carbon-impregnated fiberglass (most common)copper strandsor stainless steel braid. Insulation: Silicone rubber (high-temperature resistance up to 200°C)EPDM (ethylene propylene diene monomer)or fluoropolymer. Outer jacket: SiliconeEPDMor thermoplastic elastomer with UV and ozone resistance. Terminals: Nickel-plated brass or stainless steel with silicone boots.
Diameter
7-9 mm
Resistance
1,000-50,000 ohms per meter
Capacitance
10-50 pF per meter
Maximum Length
Typically 300-900 mm depending on application
Voltage Rating
Up to 40,000 volts
Temperature Range
-40°C to +200°C
标准
ISO 3808DIN 72551SAE J2031

行业分类与别名

点火电缆 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Insulation degradation from prolonged heat exposure->Voltage leakage to ground, weak spark, engine misfire->Use silicone-based insulation rated for continuous 200°C operation; ensure proper routing away from exhaust components; implement regular thermal inspection
Moisture ingress through damaged boots or cracks->Increased resistance, carbon tracking, complete circuit failure->Use sealed terminal boots; apply dielectric grease to connections; implement moisture-resistant jacket materials; regular visual inspections
Vibration-induced conductor fatigue->Intermittent connection, increased resistance, open circuit->Use flexible stranded conductors; secure cables with proper clamps; avoid sharp bends; implement vibration testing during design

工业生态与工程逻辑

0
Electrical shock hazard during testing
1
Engine misfire from degraded cables
2
Radio frequency interference with electronics
3
Fire risk from arcing to flammable materials
4
Catalytic converter damage from unburned fuel due to weak sparks

合规与检测

tolerance
Resistance tolerance: ±20% of specified value; Length tolerance: ±10 mm; Diameter tolerance: ±0.5 mm
test method
High-potential test: Apply 2× operating voltage for 60 seconds; Insulation resistance test: >100 MΩ at 500V DC; Resistance measurement: Digital ohmmeter at 20°C; Thermal cycling: -40°C to +150°C for 100 cycles; Vibration test: 10-2000 Hz for 24 hours

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What causes ignition cable failure?

Common failure causes include: insulation cracking from heat aging (especially above 150°C), carbon track formation from voltage leakage, terminal corrosion, physical damage from abrasion or rodent chewing, and increased resistance from moisture ingress or conductor degradation.

How do I test ignition cable resistance?

Use a digital multimeter set to ohms (Ω) scale. Measure resistance between the two terminals. Acceptable range is typically 1,000-50,000 ohms per meter of cable length. Also perform visual inspection for cracks, burns, or corrosion, and check for arcing in dark conditions.

Can I use any ignition cable for my engine?

No. Cables must match the engine's specific requirements: correct length, terminal type (boot style and connection), resistance specification (suppression vs. non-suppression), temperature rating, and diameter for proper routing and clearance.

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CNFX Industrial Component Index · 汽车制造

数据基础

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初步技术归类
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