Wenzhou Sedo Auto Co., Ltd.
Founded in 2008, Wenzhou Sedo Auto Co., Ltd. has grown into a leading enterprise in the automotive parts industry, supported by a highly skilled production and sales team. The company integrates research & development, manufacturing, and sales, specializing in the production of high-quality automotive pumps and a wide range of automotive accessories. By continuously introducing advanced production equipment and modern management systems, we ensure that our products are innovative, durable, and meet the highest industry standards.
Our extensive product portfolio covers multiple categories, enabling us to serve distributors and customers both domestically and internationally. Over the years, our commitment to quality, reliability, and timely delivery has earned the trust and appreciation of clients worldwide.
At Wenzhou Sedo Auto Co., Ltd., we invest heavily in research and development, striving to lead industry trends and introduce cutting-edge automotive technologies. Our R&D team works closely with clients to provide customized solutions that meet diverse market demands.
Guided by the business philosophy of "Credit First, Customer First, Quality Satisfaction, On-Time Delivery", we focus on understanding customer needs, promoting environmentally friendly production, continuously improving product quality, and optimizing production processes. We have established a comprehensive management system to provide our clients with professional, all-round services and long-term support.
In addition to business excellence, we are committed to corporate social responsibility, actively participating in community development and promoting sustainable manufacturing practices. Looking ahead, Wenzhou Sedo Auto Co., Ltd. aims to strengthen global partnerships, drive innovation in the automotive industry, and create long-term value for customers and society alike, achieving a future of mutual growth and shared success.
Modern internal combustion engines require individual cylinder timing precision. COP designs eliminate high-tension spark plug wires, mounting directly atop the plug. This minimizes energy dissipation, reduces Electromagnetic Interference (EMI), and provides an ultra-clean pulse delivery up to 45kV.
The primary winding consists of heavy-gauge enameled copper wire (approx. 150–200 turns), while the secondary winding utilizes micro-thin wire (up to 20,000 turns, AWG 40-44). The high transformation ratio (1:100 to 1:150) enables induction steps from 12V DC input to high-voltage plasma breakdown.
Thermal degradation and internal arc jumps are prevented using high-grade, vacuum-degassed epoxy resin system (Kyocera/Huntsman polymers). Vacuum impregnation removes micro-bubbles, guaranteeing dielectric strength beyond 30 kV/mm and thermal stability up to 160°C continuous ambient temperature.
To prevent misfires in turbocharged direct-injection (TDI) and high-compression hybrid powerplants, ignition coils engineered by top-tier Chinese manufacturers utilize grain-oriented silicon steel magnetic cores. This dramatically reduces eddy current losses and achieves a rapid energy saturation cycle (<1.8 ms dwell time).
| Parameter / Specification | Standard Automotive OEM Requirement | Wenzhou Sedo Factory Benchmark |
|---|---|---|
| Primary Resistance | 0.5 Ω – 0.9 Ω | 0.55 Ω ± 0.03 Ω (Precision Calibrated) |
| Secondary Resistance | 5.0 kΩ – 14.0 kΩ | 8.5 kΩ ± 0.4 kΩ |
| Maximum Output Voltage | ≥ 30 kV | ≥ 42 kV (High-Spark Reserve) |
| Spark Energy Duration | 1.2 ms – 1.8 ms | 2.0 ms Extended Duration |
| Operating Temperature Band | -40°C to +125°C | -40°C to +160°C (High-Temp Epoxy Grade) |
| Dielectric Insulation Strength | 25 kV/mm | > 35 kV/mm Vacuum Degassed Resin |
Our integrated manufacturing hub leverages state-of-the-art CNC tooling, precision gear shaping, automated deep hole drilling, and computerized assembly lines to deliver world-class tolerance accuracy across automotive replacement assemblies.
Traditional arc sparks are evolved into multi-channel transient plasma streams. Non-thermal plasma allows ultra-lean fuel-air ratios (Lambda > 2.0), reducing carbon emission levels while raising thermodynamic thermal efficiency past 45%.
Range extenders (EREV) require rapid cold-start sequences and continuous high-load efficiency. Modern OEM coils feature integrated smart driver ICs directly inside the coil head, enabling dynamic dwell time adjustments directly via ECU CAN-bus protocols.
Alternative gaseous fuels demand significantly higher spark breakdown voltages due to elevated dielectric resistance inside the combustion chamber. Advanced coil designs deliver spark energies exceeding 100 mJ per stroke.
Sedo Auto
