Lubrication System of Volvo Engine/Generatorby Starlight Generator dieselgeneratortech
This article will introduce engine lubrication system of diesel generator - Volvo diesel engine.
Engine oil is a common name for lubricating oils intended for use in internal combustion engines. No intrusions or changes may be made to the engine lubricating oil system other than with Volvo Penta approved accessories. Engine oil comprises base oils and various additives. It must meet the following requirements:
Good lubrication qualities
The main function of engine oil is to reduce friction and wear by creating a durable, protective film between the moving parts of an engine. High temperatures in cylinders and bearings place especially high demands on the oil film.
Good resistance to oxidation
This is necessary for reliable function, as oxidation easily occurs at high temperatures and causes damage e.g. through resin layers on vital engine parts.
Good detergent qualities
Harmful coatings are avoided, as soot and other combustion deposits are held in suspension by a dispersing agent added to the oil. Detergents also help to keep engine parts clean.
Engine oil must protect cylinder liner surfaces, bearings and other components against corrosion that would otherwise easily occur because of the moisture and acids formed during fuel combustion.
Oil that splashes around in the crank case forms a foam of air bubbles that can prevent lubrication if they are allowed to reach lubrication points. Anti-foaming agents make sure that the bubbles burst when they reach the surface in the oil bath.
Low temperature characteristics
The oil must have characteristics suitable for low temperatures in order to prevent cold start wear and to ensure that the engine starts without problem at low temperatures.
The oil must be able to carry heat away from hot engine components.
An engine requires high compression to provide maximum power. One of the functions of engine oil is to form a sealing film between the pistons and the cylinder walls.
Suitability for all operational conditions
Engine oil requirements vary depending on the type of engine and its operational conditions.
Engine Oil Specifications
The right lubricating oil
It is important both technically and economically to choose the right lubricating oil for each individual application. The requirements for the right lubricating oil type depend not only on the part of the vehicle in which it is to be used, but also on vehicle design and operational conditions. Presented below are VDS standards based on the requirements placed on lubricating oil quality.
Volvo Drain Specification (VDS)
VDS quality has requirements for certain oil specifications based on Volvo truck field tests. The first VDS category was introduced in 1982 and has been successively adapted to the latest engine designs ever since. VDS-2 was introduced in 1992, revised in 1995 and followed by VDS-3 in the year 2000, revised in 2002. The chief test parameters are piston deposits and cylinder bore polishing, but other parameters such as piston ring and bearing wear, engine cleanliness and oil decomposition are also analyzed. VDS field tests were carried out on F12 trucks (TD121 and TD122 engines) at 50,000 km change intervals. The lowest comparable oil grade is API CD. VDS II field tests were carried out on FH12 trucks (D12A engines) at 60,000 km change intervals. The lowest comparable oil grades are ACEA E3 or API CG-4.
VDS III SAE 10W-40 was developed in 2002 to take care of an increasing soot content and acidity formed with EGR (a certain exhaust return to combustion). Quality grade are API CI-4/CH-4 or ACEA E7 VDS IV SAE 10W-30, SAE 15W-40. Quality grade are or API CJ-4/ACEA E9
The additives oil companies select are the result of prolonged tests. The additives are mixed with the oil under accurate control. Therefore Volvo points out clearly and forcefully that no extra additives or so-called engine or metal treatments sold for engine oils may be added to any lubricating oil used in Volvo products. The addition of such additives does not improve lubricant quality and can in certain circumstances cause more harm than good.
In common with other vehicle manufacturers, Volvo has established lubricating oil quality requirements for its products. Therefore Volvo Penta only recommends the use of well-known brands of oil. We would like to point out that it is the responsibility of oil manufacturers to ensure that their different products meet the standards concerned. Volvo disclaims all responsibility concerning this and likewise such consequences as may arise as a result of any changes in product designations. Which oil quality your engine needs are further described in the Sales Support Tool, Partner Network.
Created on Aug 19th 2018 02:36. Viewed 374 times.