2.2 Splash and pressure lubrication system:
Splash and pressure lubrication system is a combination of splash and pressure system. In this system, the lubricating oil is supplied by a pump under pressure to main and camshaft bearings. the oil is also directed in the form of a spray from the nozzle or splashed by a scoop or dipper on the big end to lubricate bearings at the big end of the connecting rod, crank pin, gudgeon pin, piston rings, and cylinder.
2.3 Pressurized lubrication system:
In pressurized lubrication system, the lubricating oil is supplied by a pump under pressure to all parts requiring lubrication. The oil under the pressure is supplied to main bearings of the crank shaft, camshaft and connecting rod bearing surfaces. Holes drilled through the main crank shaft bearings journals, communicate oil to big end bearing and small end bearings through the hole drilled in the connecting rod. a pressure gauge is provided to confirm the circulation of oil to various parts. The pressure system incorporates a premium spin-on oil filter. Pressure lubrication is used on select single cylinder and connecting rod bearing surfaces
3. Dry-sump lubrication system:
The dry sump pump is designed with multiple stages, to insure that all the oil is scavenged from the pan. This also results in removing excess air from the crankcase, and is the reason they are called “dry sump” meaning the oil pan is essentially dry. the oil supply is carried from an external tank. The oil from the sump is pumped by means of a scavenging pump through filters to the external storage tank. the oil from the storage tank is pumped to engine cylinder through and oil cooler. The oil pressure may vary from 3 to 8 bar.
The dry-sump lubrication system is generally used for heavy-duty engines.
When dealing with any lubricating system, make sure to service all filters to keep dust out of the lubricant. Also regularly change lubricants according to manufacturer recommendations, and check your systems daily. Any changes in performance should alert you for potential problems.