Lubricant oil composition for internal combustion engines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 31, 2000
Grant Date -
N/A
app pub date -
Nov 8, 1999
filing date -
Nov 9, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention provides a lubricant oil composition for internal combustion engines which shows a sufficiently low volatility at high temperature and good low-temperature viscosity characteristics. The lubricant oil composition for internal combustion engines comprises a base oil which simultaneously satisfies the following relationships (a.sub.1) and (b.sub.1): [(A.cndot.GCD5-50+B)Exp((C.cndot.GCD5-50+D)KV100)]/KV40>1, and(a.sub.1) E.cndot.Exp(F.cndot.KV100)/KV40>1, (b.sub.1) wherein, GCD5-50 is a difference between 5% and 50% distillation points (.degree. C.) by gas chromatographic distillation test, KV40 and KV100 are kinematic viscosities (mm.sup.2 /s) at 40.degree. C. and 100.degree. C., and A to F are constants, A: -3.17.times.10.sup.-3, B: 2.87, C: -3.78.times.10.sup.4, D: 4.91.times.10.sup.-1, E: 9.41, and F: 2.09.times.10.sup.-1.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully