What are the three types of lubrication systems in IC engine?
(i) Fluid lubricants (Which include oil) (ii) Semi fluid lubricants (Which include grease and heavy) (iii) Solid lubricants (Which include graphite, mica etc).
What provides the film of lubrication between piston and cylinder wall?
The wiper ring, sometimes called the scraper ring, Napier ring, or back-up compression ring, is the next ring away from the cylinder head on the piston. The wiper ring provides a consistent thickness of oil film to lubricate the running surface of the compression ring.
What is the main engine lubrication system?
The lubrication system used by the Wright brothers is quite simple. An oil pump is located on the bottom of the engine, at the left of the figure. The oil then runs down inside the crankcase to the main bearings holding the crankshaft. Oil is picked up and splashed onto the bearings to lubricate these surfaces.
What are the three types of piston rings?
Piston rings from Perkins come as three rings. They are the top compression ring, then the intermediate compression ring and finally the oil control ring. These parts are relatively small in size but play a large role in the main cylinder block of your engine.
What kind of lubrication is used in scooter engine?
This is generally used for small two-stroke engines, e.g., scooter and motorcycle engines. It is the simplest of all types of engine lubrication systems. A certain amount of lubricating oil is mixed with petrol its self, the usual ratio is 2% to 3% of fuel.
How is oil circulated in an engine lubrication system?
After lubricating the piston pin and cylinder wall, the oil drains back into the oil pan and is re-circulated through the lubrication system. A small pipe leads oil from the pump to the rocker-arm shaft. A valve stem is lubricated by oil coming out from the drilled rocker-arm shaft.
Where is the lubricating oil stored in an IC engine?
-In this system of lubrication the lubricating oil is stored in an oil sump. A scoop or dipper is made in the lower part of the connecting rod. When the engine runs, the dipper dips in the oil once in every revolution of the crank shaft, the oil is splashed on the cylinder wall.
What happens when lubricating oil is mixed with petrol?
A certain amount of lubricating oil is mixed with petrol its self, the usual ratio is 2% to 3% of fuel. If it is less, there is a danger of insufficient lubrication causing the image to the engine. If it is more, there will be excessive carbon deposits in the cylinder head, and the engine will also give dark smoke. 2. Splash system
This is generally used for small two-stroke engines, e.g., scooter and motorcycle engines. It is the simplest of all types of engine lubrication systems. A certain amount of lubricating oil is mixed with petrol its self, the usual ratio is 2% to 3% of fuel.
How is the lubrication system used in an IC engine?
In this system of lubrication, the engine parts are lubricated under pressure feed. The lubricating oil is stored in a separate tank (in case of dry sump system) or in the sump (in case of wet sump system), from where an oil pump (gear pump) delivers the oil to the main oil gallery at a pressure of 2-4 kg/cm2 through an oil filter.
Where does the lubrication come from in a four stroke engine?
■ “Outer lubrication”, where the oil is supplied by an external, separate cylinder lubricating device from the cylinder liner side. In a four-stroke trunk piston engine, the cylinder lubricating oil is identical to the engine system oil used for bearing lubrication and cooling purposes. where it is “consumed”.
When do you inject lubricating oil into a cylinder?
At the same time, if lubricating oil is injected during the expansion stroke, i.e. when the piston is moving downwards, it will have a scrapping effect rather than lubrication. ■ “Outer lubrication”, where the oil is supplied by an external, separate cylinder lubricating device from the cylinder liner side.