行业组件数据 · 2026

燃油表

A fuel gauge is an automotive instrument that displays the remaining fuel level in a vehicle's tank using electrical or mechanical sensors.

技术定义与适配语境
典型 燃油表 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。

A fuel gauge is a critical component of a vehicle's gauge cluster that provides real-time monitoring of fuel quantity. It consists of a sending unit (typically a float-arm resistor assembly inside the fuel tank) and a display unit (analog needle or digital readout). The system converts fuel level into electrical signals through variable resistance, which are then translated into visual indicators for the driver. Modern versions may integrate with electronic control units for enhanced accuracy and diagnostic capabilities.

组件规格

定义
A fuel gauge is a critical component of a vehicle's gauge cluster that provides real-time monitoring of fuel quantity. It consists of a sending unit (typically a float-arm resistor assembly inside the fuel tank) and a display unit (analog needle or digital readout). The system converts fuel level into electrical signals through variable resistance, which are then translated into visual indicators for the driver. Modern versions may integrate with electronic control units for enhanced accuracy and diagnostic capabilities.
工作原理
The fuel gauge operates on a variable resistance principle. A float attached to a potentiometer moves with fuel level changes, altering resistance in the circuit. This resistance change modifies current flow to the gauge's display mechanism. In analog systems, this current drives a bimetallic strip or moving coil meter; in digital systems, an analog-to-digital converter processes the signal for electronic display. The system typically operates on 12V DC automotive power with compensation for vehicle movement and temperature variations.
材料
Housing: ABS plastic or die-cast aluminumFloat: Polypropylene foam or nitrile rubberArm: Stainless steel or brassPotentiometer: Carbon track with copper terminalsElectrical contacts: Gold-plated brassDisplay face: Polycarbonate with anti-glare coatingNeedle: Aluminum with luminescent coating.
Accuracy
±5% of full scale
Lifespan
>100,000 cycles
IP Rating
IP67 for sending unit
Response Time
<2 seconds
Resistance Range
0-90 ohms (empty-full)
Operating Voltage
12V DC
Temperature Range
-40°C to 85°C
标准
ISO 2575SAE J1229DIN 72781

行业分类与别名

燃油表 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

Float saturation with fuel->Stuck float provides constant reading regardless of actual fuel level->Use closed-cell foam floats with fuel-resistant coatings and regular inspection intervals
Potentiometer track wear->Erratic or non-linear resistance changes causing jumping needle->Implement redundant sensor systems and use durable carbon composite tracks

工业生态与工程逻辑

0
Electrical short circuits causing fire hazard
1
Inaccurate readings leading to fuel exhaustion
2
Mechanical failure of float arm
3
Corrosion in fuel tank environment

合规与检测

tolerance
±2% of indicated value under static conditions, ±5% during vehicle operation
test method
SAE J1229 procedures: immersion testing with certified calibration fluids, vibration testing per ISO 16750-3, temperature cycling from -40°C to 85°C

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

Why does my fuel gauge show inaccurate readings?

Common causes include a stuck float, corroded electrical contacts, faulty sending unit resistor, or wiring issues. The float may become saturated with fuel, or the potentiometer track may wear out over time.

Can fuel gauges be calibrated?

Yes, most electronic fuel gauges can be calibrated using manufacturer-specific procedures. This typically involves setting empty and full positions through diagnostic tools or manual adjustment of the sending unit.

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CNFX Industrial Component Index · 汽车制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

请求制造能力信息: 燃油表

说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。

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