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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12031101 B1

PDFFull Text
Date of Patent:
Jul. 09, 2024

Filed:

Feb. 21, 2018

Relating to lubricating compositions

Applicant:

Infineum International Limited, Abingdon, GB;

Inventors:

Gregory Stidder, Wantage, GB;

Robert W. Shaw, Abingdon, GB;

Simon Crick, Wallingford, GB;

Assignee:

Infineum International Limited, Abingdon, GB;

Attorney:

Robert A. Migliorini

Primary Examiner:

Taiwo Oladapo

Int. Cl.
CPC ...
C10M 169/00 (2006.01); C10M 101/00 (2006.01); C10M 129/54 (2006.01); C10M 139/04 (2006.01); C10M 141/12 (2006.01); C10M 155/02 (2006.01); C10M 169/04 (2006.01); C10N 30/04 (2006.01); C10N 40/25 (2006.01);
U.S. Cl.
CPC ...
C10M 141/12 (2013.01); C10M 101/00 (2013.01); C10M 129/54 (2013.01); C10M 139/04 (2013.01); C10M 155/02 (2013.01); C10M 169/044 (2013.01); C10M 2203/003 (2013.01); C10M 2207/129 (2013.01); C10M 2207/144 (2013.01); C10M 2215/064 (2013.01); C10M 2215/28 (2013.01); C10M 2227/02 (2013.01); C10M 2227/04 (2013.01); C10M 2229/041 (2013.01); C10M 2229/042 (2013.01); C10M 2229/046 (2013.01); C10M 2229/047 (2013.01); C10M 2229/052 (2013.01); C10N 2030/04 (2013.01); C10N 2040/255 (2020.05);
Abstract

A lubricating oil composition, a method of reducing low-speed pre-ignition (LSPI) in a direct-injected spark-ignited internal combustion engine, and a use of a lubricant composition to reduce LSPI events in such an engine. Preferably, the composition comprises a detergent comprising an overbased calcium detergent having a total base number (TBN) of at least 150, wherein the lubricating oil composition has a calcium content of at least 0.08 wt. %, based on the weight of the lubricating oil composition, and wherein the lubricating oil composition has a silicon content of at least 12 ppm by weight, based on the weight of the lubricating oil composition.

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