Title:
LUBRICATING OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2003/027216
Kind Code:
A1
Abstract:
A lubricating oil composition for internal combustion engines which is excellent in antiwear performance and high−temperature detergency although reduced in ash content and is especially suitable for use in diesel engines equipped with an exhaust−gas post−treatment device. The lubricating oil composition for internal combustion engines comprises a base oil comprising a mineral oil and&sol or a synthetic oil and, incorpoarted therein, (A) 0.08 to 0.40 wt.% ash−free succinimide dispersant in terms of nitrogen amount, (B) 0.06 to 0.22 wt.% metallic detergent in terms of metal element amount, (C) 0.04 to 0.08 wt.% zinc (sec−alkyl)dithiophosphate in terms of phosphorus amount, and (D) 0.01 to 0.04 wt.% ash−free phosphorus−compound antiwear agent in terms of phosphorus amount. The content of sulfated ashes derived from metal elements in the composition is 0.3 to 1.0 wt.%.
Inventors:
Shirahama, Shinichi c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Yamada, Yasuhisa c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Kurihara, Isao c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Yamada, Yasuhisa c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Kurihara, Isao c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Application Number:
PCT/JP2002/009124
Publication Date:
April 03, 2003
Filing Date:
September 06, 2002
Export Citation:
Assignee:
NIPPON OIL CORPORATION (3-12, Nishi-shimbashi 1-chome Minato-ku, Tokyo, 105-8412, JP)
Shirahama, Shinichi c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Yamada, Yasuhisa c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Kurihara, Isao c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Shirahama, Shinichi c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Yamada, Yasuhisa c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
Kurihara, Isao c/o NIPPON OIL CORPORATION (8 Chidori-cho, Naka-k, Yokohama-shi Kanagawa, 231-0815, JP)
International Classes:
C10M101/02; C10M105/04; C10M133/16; C10M133/56; C10M137/02; C10M137/04; C10M137/10; C10M159/20; C10M159/22; C10M163/00; C10M167/00; C10M169/04; C10N10/04; C10N40/25; (IPC1-7): C10M163/00
Attorney, Agent or Firm:
Morita, Nobuyuki (Watase Bldg, 5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo, 105-0003, JP)
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