US 2018/0346839 A1 · METHODS FOR IMPROVING RESISTANCE TO TIMING CHAIN WEAR WITH A MULTI-COMPONENT DETERGENT SYSTEM

Abstract

A method for reducing timing chain stretch in an engine comprising a step of lubricating said timing chain with a lubricating oil composition that includes a major amount of a base oil; and a minor amount of an additive package including at least one overbased calcium phenate detergent having a total base number of at least 150 mg KOH/g, measured by the method of ASTM D-2896, at least one calcium sulfonate detergent; and at least one magnesium-containing detergent. The lubricating oil composition has a weight ratio of total calcium from the at least one calcium sulfonate detergent to total calcium and magnesium in the lubricating oil composition of from about 0.06 to less than about 0.45.

Claims18

Dependent claims

A method for reducing timing chain stretch of a timing chain in an engine comprising a step of lubricating said timing chain with a lubricating oil composition comprising:

a major amount of a base oil;
and
a minor amount of an additive package including:
a) at least one overbased calcium phenate detergent having a total base number of at least 150 mg KOH/g, measured by the method of ASTM D-2896;
b) at least one calcium sulfonate detergent;
and
c) at least one magnesium-containing detergent;
wherein the lubricating oil composition has a weight ratio of total calcium from the at least one calcium sulfonate detergent to total calcium and magnesium in the lubricating oil composition of from 0.06 to 0.35.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/613,696Filed 5 Jun 2017

Published

6 Dec 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

C10M 169/042
Mixtures of base-materials and additives: the additives being compounds of unknown or incompletely defined constitution only
C10M 159/22
Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products: containing phenol radicals
C10M 159/24
Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products: containing sulfonic radicals
C10M 2201/085
Inorganic compounds or elements as ingredients in lubricant compositions: phosphorus oxides, acids or salts

Methods for improving resistance to timing chain wear with a multi-component detergent system

Life of this patent

Methods for improving resistance to timing chain wear with a multi-component detergent system

Life of this patent

Abstract

Claims18