Title:
亜鉛ジアルキルジチオホスフェートを有する潤滑剤及びブーストされた内部燃焼エンジンにおけるそれらの使用
Document Type and Number:
Japanese Patent JP6691957
Kind Code:
B2
Abstract:
A lubricating oil composition and method of for providing an acceptable number of low-speed pre-ignition events in a boosted internal combustion engine using the lubricating oil composition. The lubricating oil composition includes greater than 50 wt. % of a base oil of lubricating viscosity, and an additive composition that includes an overbased calcium-containing detergent having a TBN greater than 225 mg KOH/g, and one or more zinc dialkyl dithiophosphate compounds are derived from a molar ratio of secondary alcohol to primary alcohol of 20:100 to about 100:0 and have an average total carbon content of greater than 10 carbon atoms per mole of phosphorous. The lubricating oil compositions contains the overbased calcium-containing detergent in an amount to provide greater than 900 ppm to less than 2400 ppm by weight calcium, and at least 0.01 wt. % of the zinc dialkyl dithiophosphate, both amounts based on the total weight of the lubricating oil composition.
Inventors:
Christine Fletcher
William Wai Lam
Consheng Yang
Jeremy Steyer
William Wai Lam
Consheng Yang
Jeremy Steyer
Application Number:
JP2018501894A
Publication Date:
May 13, 2020
Filing Date:
July 14, 2016
Export Citation:
Assignee:
Afton Chemical Corporation
International Classes:
C10M163/00
Domestic Patent References:
| JP2015163673A | ||||
| JP1201399A | ||||
| JP2003165992A | ||||
| JP2003500521A |
Foreign References:
| WO2015042340A1 |
Attorney, Agent or Firm:
Patent Service Corporation Patent Office Sykes