Abstract

We have developed a long life engine coolant that has performance equivalent to current coolants with respect to impact on cooling system parts and anti-corrosion performance for extended metal life through the use of organic carboxylate, inorganic oxychloride inhibitors, and other compounds added in appropriate amounts.Vehicles utilizing this coolant realized maintenance intervals more than two times longer than with current coolant. In addition, this maintenance reduction reduces the amount of coolant waste generated with regular replacement by approximately 70% or more, and makes it possible to reduce disposal costs and incineration volumes.

References

1. (1) Japan Auto Chemical Industry Association: Auto Chemical, p.96-100, Saiwai Shobo (1991) (Written in Japanese)
2. (2) Encyclopedia Chimica 1, p.908, Kyoritsu Shuppan Co., LTD. (1989) (Written in Japanese)
3. (3) D4340, Standard Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants under Heat-Rejecting Conditions, ASTM 15.05, p.158-161 (1999)
4. (4) Kiryu, K., et.al: “The Relationship between Sealing Performance of Mechanical Seals and Composition of Coolants for Automotive Engines, 1993 American Society for Testing and Materials, p.215-233 (1993)

Author (organization or company)

• Mitsuru OSAWA（Tochigi R&D Center）
• Keizou FUKUDA（Tochigi R&D Center）
• Toshiro IJIMA（Tochigi R&D Center）
• Takashi NAGASHIMA（Tochigi R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.12 No.2 (159 - 164)

PDF

Citation Information