The engineering drawings: These detailed drawings show all the parts, their sizes, as well as how they fit together. Purpose of Lubrication System Lubricate Ø Reduces Friction by creating a thin film Clearance between moving parts Bearings and journals Seals Ø The oil helps form a gastight seal between piston rings and cylinder walls Reduces Blow-By Ø Internal oil leak blow-by will result in blue smoke at the tale pipe. As the coolant is cooled in the radiator, it again becomes more dense and heavier. The grease nipple is positioned on the bearing surface where the grease is then delivered. The main and the camshaft bearing are usually the items that are force fed while the connecting rods are fitted with dippers that supply oil to the rest of the component by splash.
This raises the boiling point of the engine coolant to about 250°F to 260°F. Outside atmospheric pressure could then crush inward on the hoses and radiator. In some engines, these opening are holes that line up once for every crankshaft revolution. Self-lubricating thermoplastics — This is a type of plastic material that has a lubricant already build into it. The functions of the pressure cap are as follows: 1.
If a combination system is used on an overhead valve engine, the upper valve train is lubricated by pressure from the pump. This allows the pressure until the safety circuit is activated. From the oil galleries, it flows to the main bearings and camshaft bearings. The properties of engine oil and the design of modern engines allow the lubrication system to accomplish these functions. Additional information on the nameplate also called a data plate of a machine: The following information are required for nameplates and will help you choose the correct lubricant.
The engine in your car runs best at a fairly high temperature. When the engine is cold, components wear out faster, and the engine is less efficient and emits more pollution. Provide a barrier between moving parts to reduce friction, heat buildup, and wear. If the lubricating system should fail, not only will the engine stop, but many of the parts are likely to be damage beyond repair. The fan ensures airflow through the radiator at times when there is no vehicle motion. The amount of air flowing over the heated surfaces 4.
Cylinder walls are lubricated by splashing oil thrown off from the connecting-rod bearings. Force Feed A somewhat more complete pressurization of lubrication is achieved in the force-feed lubrication system. The main bearings have oil-feed holes or grooves that feed oil into drilled passages in the crankshaft. In other engines, there are annular grooves in the main through which oil can feed constantly into the hole in the crankshaft. Gears in enclosed gear drives can also be splash lubricated. Combination Splash and Force Feed In a combination splash and force feed fig.
It is widely used in small four-cycle engines for lawn mowers, outboard marine operation, and so on. . From the oil galleries, it flows to the main bearings and camshaft bearings. Cooling of the engine parts is accomplished by keeping the coolant circulating and in contact with the metal surfaces to be cooled. The pressurized oil that lubricates the connecting- rod bearings goes on to lubricate the and walls by squirting out through strategically drilled holes. Cleans the inside of the engine by removing contaminants metal, dirt, plastic, rubber, and other particles. The coolant then passes through a set of tubes to the bottom of the radiator from which the cooling cycle begins.
The pressurized oil that lubricates the connecting- rod bearings goes on to lubricate the pistons and walls by squirting out through strategically drilled holes. One reason is that the level of oil in the crankcase will vary greatly the amount of lubrication received by the engine. The effectiveness of splash lubrication is determined in part by the kind of oil used. A spring loaded piston connected to a handle provide mechanical advantage to assist in forcing the grease through a bendable pipe into a grease nipple. The pressure at the end of the combustion process is considerably increased due to the heat release from the fuel.
As these parts move through the lubricant, pick up the lubricant and splashes it onto the rest of the parts. In some large compressors, cylinders are lubricated mechanical forced lubricators, located external to the crankshaft. Remove excess heat from the engine. Mechanical Lubrication Essay Sample Task 1: P1 Describe the purpose and application of three different types of lubricant: What is Lubrication: Lubrication is a process or technique when a component is having been made smooth and slippery by the application of Lubricant. The entire lubrication system should be checked daily for all indicator gauge readings, pipe connections, vibration, bolted connections, oil leaks or seepage, loose accessories and wiring connections. If the oil pressure is too low, make sure that you used the correct grade and amount of oil. This causes a much heavier splash so that adequate lubrication of the pistons and the connecting-rod bearings is provided at higher speeds.