Dae Han Lee Yon Inc.

  • Company Name: Dae Han Lee Yon Inc.
  • CEO: Taek Sung Lee
  • Type of Business: Manufacturing of New Automotive Engine Components
  • Business Contents: Manufacturing of piston rings, cylinder liners, and precision engine components for automobiles, motorcycles, industrial engines, and commercial vehicles
  • Form of Company: Small and Medium-sized Enterprise (SME)
  • Established Date: January 26, 1988
  • Number of Employees: 192 (180 employees according to 2025 business registration data)
  • Sales Turnover: KRW 77.63 Billion (2025)
  • Capital: KRW 7.0 Billion
  • Business Profit: KRW 2.30 Billion (2025)
  • Website: https://www.daehanly.com/ ,  https://www.korearing.com/
  • Address: 90, Sintanjin-ro 756 beon-gil, Daedeok-gu, Daejeon, Republic of Korea

Company Overview

Founded in 1988 through a technical partnership and joint venture with RIKEN Corporation of Japan, Dae Han Lee Yon Inc. has grown into one of Korea’s leading manufacturers of piston rings and cylinder liners for automotive engines.

The company designs, develops, and manufactures high-performance engine sealing components using advanced casting technologies, precision machining, and proprietary surface treatment technologies. Its products are widely used in passenger cars, commercial vehicles, motorcycles, industrial engines, and construction equipment.

Through continuous investment in R&D, Dae Han Lee Yon has successfully commercialized several industry-first technologies in Korea, including CrN PVD ion plating, RNS M+GN-T oil ring technology, and multiple patented low-friction piston ring designs that improve fuel efficiency, durability, and engine performance.

Today, the company supplies major OEMs in Korea while exporting products throughout Asia, Europe, North America, and Central & South America.

Major Customers

Dae Han Lee Yon supplies engine components to leading automotive manufacturers including:

  • Hyundai Motor Company
  • Kia Corporation
  • Renault Korea
  • KG Mobility
  • Hyundai Mobis
  • Hyundai WIA
  • HD Hyundai Infracore
  • DL Motors

Quality & Certifications

The company maintains internationally recognized quality systems including:

  • IATF 16949 Automotive Quality Management
  • ISO 14001 Environmental Management System
  • ISO 45001 Occupational Health & Safety Management System
  • ISO 22301 Business Continuity Management System
  • GM BIQS Level 5
  • Hyundai Motor Quality 5-Star Certification

Research & Development

Dae Han Lee Yon operates a dedicated corporate R&D center focused on:

  • Advanced piston ring materials
  • Surface treatment technologies
  • Friction reduction
  • Fuel efficiency improvement
  • Wear-resistant coatings
  • High-performance engine sealing technologies

Its innovations have enabled multiple first-to-market technologies in Korea for modern gasoline and turbocharged engines.

History of Dae Han Lee Yon Inc.

2024

  • CEO Taek Sung Lee inaugurated as the 30th Chairman of the Korea Auto Industries Cooperative Association (KAICA)
  • Received the GM Supplier Quality Excellence Award for the third consecutive year

2023

  • Received the Model SME Entrepreneur Award from the Ministry of SMEs and Startups

2021

  • Certified to ISO 45001 Occupational Health & Safety Management System

2020

  • Received the GM Supplier Quality Excellence Award for the fifth consecutive year
  • Selected as a Root Industry Company in the Surface Processing Sector
  • Awarded Hyundai Motor Quality 4-Star Certification

2019

  • Certified to ISO 14001 Environmental Management System
  • Achieved GM BIQS Level 5
  • Received the EcoVadis CSR Silver Award

2018

  • Certified to ISO 22301 Business Continuity Management System

2017

  • Developed and mass-produced Korea’s first RNS M+GN-T oil ring technology

2012

  • Increased capital to KRW 7 billion

2011

  • Achieved Hyundai-Kia Motors Quality 5-Star Certification

2010

  • Obtained GM Korea SQB Certification

2009

  • Developed piston rings for Hyundai Motor’s Tau Engine, recognized among Ward’s 10 Best Engines in the United States

2008

  • Converted to a Korean-owned corporation
  • CEO Taek Sung Lee appointed
  • Began supplying components to SsangYong Motor

2006

  • Certified to ISO/TS 16949 Quality Management System

2004

  • Received Hyundai-Kia Motors 4.5-Star Quality Rating
  • Developed and mass-produced Korea’s first CrN PVD coated piston rings

2001

  • Began supplying piston rings to Renault Samsung Motors

2000

  • Introduced Six Sigma management system

1997

  • Designated as an autonomous calibration laboratory for surface roughness and hardness testing

1996

  • Corporate R&D Center officially recognized by the Korea Industrial Technology Association (KOITA)

1995

  • Registered the second manufacturing plant
  • Acquired piston ring and cylinder liner production facilities from Hankuk Lee Yon Co., Ltd.

1989

  • Began OEM supplies to Hyundai Motor and Kia Motors

1988

  • Established Dae Han Lee Yon Inc.
  • Registered as a foreign-invested company
  • Founded through a technical partnership and joint venture with RIKEN Corporation of Japan
  • Registered its first manufacturing plant in Daejeon

Main Products

Piston Rings

High-performance piston rings for gasoline, diesel, hybrid, and industrial engines.

Product lineup includes:

  • Top Compression Ring
  • Second Compression Ring
  • 2-Piece Oil Ring (D.V.M.)
  • 3-Piece Oil Ring (Vent Type)

Key features:

  • Improved combustion sealing
  • Reduced engine oil consumption
  • Enhanced heat transfer
  • Low-friction surface technology
  • Increased durability
  • Higher fuel efficiency

Cylinder Liners

Precision cylinder liners designed for internal combustion engines.

Functions include:

  • Piston guidance
  • Combustion chamber sealing
  • Heat dissipation
  • Engine cooling
  • Lubrication support
  • Extended engine durability

Core Technologies

Dae Han Lee Yon has developed numerous proprietary technologies, including:

  • Korea’s first CrN PVD (Ion Plating) surface coating
  • RNS M+GN-T low-friction oil ring technology
  • Nano Alpha wear-resistant coating
  • Asymmetric barrel face piston ring design
  • High-barrel piston ring technology
  • Low-tension, thin-width piston rings for improved fuel economy
  • Patented anti-rotation oil ring technology

These technologies contribute to:

  • Reduced friction losses
  • Lower emissions
  • Increased engine efficiency
  • Longer engine life
  • Higher durability under high-performance engine conditions

Product Applications

The company’s products are used in:

  • Passenger Vehicles
  • Commercial Vehicles
  • Motorcycles
  • Industrial Engines
  • Construction Equipment
  • Agricultural Machinery

Major engine programs include:

  • 1.0L Turbo (EU7)
  • 1.4L & 1.6L MPI / Turbo
  • 1.8L & 2.0L Naturally Aspirated
  • 2.5L Turbo
  • 3.0L & 3.5L Turbo

Competitive Strengths

Dae Han Lee Yon has established itself as one of Korea’s leading specialists in automotive engine sealing components through decades of technological innovation and precision manufacturing.

The company combines advanced surface engineering, proprietary low-friction technologies, and strong OEM partnerships to deliver high-performance piston rings and cylinder liners for modern internal combustion engines.

Supported by continuous R&D investment, internationally recognized quality systems, and a growing global customer base, Dae Han Lee Yon continues to strengthen its position as a trusted supplier to both domestic and international automotive manufacturers.