Cold Cranking Capacity Enhancement in Engine Lubricants

Viscosity index improver composition for lubricating oils, comprising a combination of two poly(meth)acrylates, one having a diol group and the other having a boronic acid ester group, which exhibit a unique temperature-dependent association behavior that maintains viscosity stability across a wide temperature range. The composition is particularly effective in lubricating oils used in automotive and industrial applications, where maintaining viscosity stability is critical for optimal performance and wear protection.

Source

Lubricating oil composition with improved low-temperature viscosity characteristics, comprising a specific copolymer (A) and a base oil (B), wherein the copolymer (A) is a propylene-based copolymer with an intrinsic viscosity of 0.45-2.3 dl/g and a glass transition temperature of -20 to 15°C, and the copolymer (A) is present in a concentration of 0.1-50 parts by mass per 100 parts by mass of the total composition.

Source

A lubricating oil composition for internal combustion engines that achieves both excellent Low Speed Pre-Ignition (LSPI) suppression and fuel saving performance. The composition comprises a lubricating base oil and a metal-based detergent containing a calcium-based detergent with a specific boron-to-calcium ratio and a magnesium-based detergent within defined concentration ranges. The boron-to-calcium ratio in the calcium-based detergent is critical to achieving both LSPI suppression and fuel saving performance.

Source

Lubricating oil composition for internal combustion engines with improved fuel efficiency, comprising a lubricating base oil, magnesium salicylate, calcium salicylate, and a molybdenum-based friction modifier, optionally including anti-wear agents, antioxidants, and dispersants.

Source

Lubricating oil composition for internal combustion engines that combines high fuel efficiency with low-speed pre-ignition (LSPI) reduction. The composition comprises a mineral oil-based base oil with a specific viscosity range and magnesium salicylate as a metallic detergent, in a specific concentration range. The combination enables both improved fuel economy and reduced LSPI events in downsized turbocharged engines.

Source

Lubricating oil composition for reducing Low Speed Pre-Ignition (LSPI) events in direct injection-spark ignition engines, comprising a base oil, a calcium-containing detergent providing a calcium content of at least 0.08 wt.%, and a silicon-containing additive providing a silicon content of at least 12 ppm by weight. The composition can be used to lubricate the crankcase of the engine, reducing the occurrence of LSPI events.

Source

A lubricating oil composition for engines with low surface roughness, particularly suitable for hybrid and idling stop mechanisms, comprising a mineral base oil, a polymer with a weight average molecular weight of 100-15,000, and a molybdenum-based friction modifier. The composition has a kinematic viscosity of 35.0 mm2/s or less at 40°C, and the polymer content is 0.1-5.0% by mass. The molybdenum-based friction modifier contains two or more selected from binuclear molybdenum dithiocarbamate, trinuclear molybdenum dithiocarbamate, and molybdenum amine complex, and the molybdenum content is 50-2,000 ppm by mass.

Source

Lubricating oil compositions for internal combustion engines that exhibit improved oxidation, wear, and anti-corrosion characteristics. The compositions comprise a combination of additives, including functionalized olefin copolymers, sulfurized fatty acid esters, and other components, that work together to provide enhanced performance in gasoline and diesel engines. The compositions have specific properties, such as low sulfated ash content, high soot dispersancy, and controlled base number, that enable them to meet the demands of modern engines while minimizing environmental impact.

Source

Lubricant compositions for internal combustion engines, comprising a base oil and a dispersant viscosity index improver (DVI) additive, wherein the DVI is a functionalized, hydrogenated polymer of conjugated dienes, such as isoprene or butadiene, having a controlled molecular weight distribution and a functionality distribution of 3.5 or less. The polymer is selectively hydrogenated to produce a polymer with a molecular weight distribution of less than 2, and then functionalized with amide, imide, or ester groups. The lubricant compositions exhibit improved soot dispersancy, wear protection, and cleanliness in engine applications, particularly in compression-ignited engines.

Source

Lubricating oil compositions for heavy-duty diesel engines that exhibit improved friction characteristics and wear protection, comprising a base oil, detergent, and one or more metal alkanoates having a quaternary carbon atom at the 2 position and/or at the 2' position. The metal alkanoates are represented by the Formula (I): R1R2R3COOM, where R1, R2, and R3 are alkyl groups, and M is a metal ion. The compositions have improved wear protection, reduced friction, and low foaming properties, while maintaining a low total base number impact.

Source

A copolymer additive for improving low-temperature properties of middle distillate fuels, comprising units of formula (A) and dialkyl fumarate monomers of formula (D), that counteracts negative interactions between nitrogen-containing detergents and wax anti-settling additives, thereby preventing precipitation and sedimentation of waxes in fuels at low temperatures.

Source

Due to rapid depletion of natural resources, the cost of petroleum fuels continues to rise, making them unaffordable for the average person.This is especially true in the Indian context.Consequently, C.I. requires a variety of fuel alternatives.The value of engines is rising.The improvement of C.I.'s thermal efficiency is the subject of extensive research.Powerhouse of the High-Tech Industry.Only roughly one-third of the thermal energy from the fuel is transferred to meaningful work by even the most efficient engine; the other two-thirds are wasted as exhaust and coolant.If energy loss can be minimized, Engine performance will increase.Researchers and specialists agree on a number of approaches for improving Engine performance.The idea of a Low Heat Rejection (LHR) Engine is one of the most promising.By utilizing thermally insulated parts, the performance of the LHR Engine can be enhanced.These parts not only improve thermal efficiency but also reduce heat loss to the environment.Various insulations, including ceramic coating on the inner surface of the cylinder head and a 2mm air ga... Read More

Source

Low viscosity engine oil lubricant compositions that provide improved fuel efficiency and engine wear protection while maintaining low oil consumption over a broad temperature range. The compositions comprise a low viscosity and low volatility base oil that exhibits unexpectedly low evaporation rate compared to conventional base oil combinations with similar Noack levels. The engine oil lubricant compositions are particularly suitable for use in direct injection engines, gasoline engines, and diesel engines, and are particularly effective as OW-4, 0W-8, OW-12, and OW-16 viscosity grade engine oils.

Source

Comb copolymer viscosity modifiers for lubricating oils, comprising a hydrogenated polybutadiene-based (alk)acrylate ester macromonomer, a C3-C8 alkyl (alk)acrylate ester monomer, a C12-C24 alkyl (alk)acrylate ester monomer, and a C1-C18 alkyl-endcapped or C6-C20 aryl-, aralkyl-, or alkaryl-endcapped C2-C6 oxyalkyl or C2-C6 oligo(alkylene glycol)-based (alk)acrylate ester monomer. The copolymers exhibit improved low-temperature properties, high-temperature high-shear viscosities, and soot dispersancy, while maintaining shear stability and oil solubility over a broad temperature range.

Source

Lubricating oil composition for internal combustion engines that improves fuel efficiency, LSPI suppression, oil consumption suppression, and detergency in a well-balanced manner. The composition contains a mineral or synthetic base oil with specific viscosity and evaporation properties. It also has calcium borate and magnesium detergents, a poly(meth)acrylate viscosity index improver, and optionally a molybdenum friction modifier.

Source

A lubricating oil composition for internal combustion engines that balances fuel efficiency, low-speed pre-ignition (LSPI) suppression, lubricant consumption reduction, and detergency. The composition comprises a base oil with a specific viscosity range and evaporation loss, calcium and magnesium detergents, zinc dialkyl dithiophosphate, and an optional viscosity index improver. The calcium detergent is present in a specific concentration range to prevent LSPI, while the magnesium detergent maintains detergency. The zinc dialkyl dithiophosphate provides anti-wear protection.

Source

Lubricating compositions with improved cold thickening properties, comprising a specific comb polymer that enhances cold gelation performance, particularly in formulations with modified detergent chemistries. The polymer is derived from monomers with specific functional groups, including (meth)acrylates and (meth)acrylamides, and is used in amounts of 1-20% by mass in the lubricating composition.

Source

Lubricating oil composition for reducing low-speed pre-ignition (LSPI) events in turbocharged gasoline direct-injection engines, comprising a base oil and an additive composition prepared by mixing a calcium-containing detergent and a silicon-containing compound. The composition provides a significant reduction in LSPI events while maintaining corrosion protection and storage stability.

Source

A lubricating oil composition for gasoline engines that achieves high fuel efficiency while maintaining low friction and wear characteristics across a wide temperature range. The composition contains a base oil, metal-based detergents, and a combination of amine-based, ether-based, and ester-based friction modifiers. The molybdenum dithiocarbamate content is optimized to balance friction reduction and base number retention. The composition exhibits improved fuel efficiency, reduced friction, and enhanced wear protection compared to conventional lubricating oils.

Source

This article discusses the influence of lubricating properties of motor oils on the operation of engine parts. The quality of engine oils, especially lubricating indicators significantly affect the reliability of the engine, fuel consumption and other parameters. Therefore, high-quality selection and application of motor oils is very important.

Source