Engine Block is the main part of the engine it contains major parts of the engine. First, we will take about the parts that are inside the engine block
1. Cylinder
The cylinder is a part in which the intake of fuel, compression of fuel and burning of fuel take place. The main function of the cylinder is to guide piston.
2. Pistons
A piston is fitted to each cylinder as a face to receive gas pressure and transmit the thrust to the connecting rod. It is a prime mover in the engine. The main function of piston is to give tight seal to the cylinder through the bore and slide freely inside of a cylinder. The piston should be light and sufficiently strong to handle the gas pressure generated by the combustion of fuel. So the piston is made by aluminium alloy and sometimes it is made by cast iron because light alloy piston expands more than cast iron so they need more clearances to the bore.
3. Piston Ring
A piston must be a fairly loose fit in the cylinder so it can move freely inside the cylinder. If the piston is a too-tight fit, it would expand as it got hot and might stick tight in the cylinder and if it loses it would leak the vapour pressure. To provide a good sealing fit and less friction resistance between the piston and cylinder, the piston is equipped with piston rings. These rings are fitted in grooves which have been cut in the piston. They are split at one end so they can expand or slipped over the end of the piston. A small two-stroke engine has two piston rings to provide good sealing but in the four-stroke engine has an extra ring which is known as oil ring. Piston rings are made of cast iron of fine grain and high elastic material which is not affected by the working heat. Sometimes it is made by alloy spring steel.
4. Connecting Rod
Connecting rod connects the piston to the crankshaft and transmits the motion and thrust of piston tp crankshaft. It converts the reciprocating motion into rotary motion of the crankshaft. These are two end of connecting rod one is known as a big end and the other is a small end. The big end is connected to the crankshaft and small end is connected to the piston by use of piston pin. The connecting rod is made of nickel, chrome, and chrome vanadium steels. for small engines, the material may be aluminium.
5. Crankshaft & Bearing
The crankshaft of an internal combustion engine receives the efforts or thrust supplied by the piston to the connecting rod converts the reciprocating motion of the piston into rotary motion of the crankshaft. The crankshaft mounts in bearing so it can rotate freely. The shape and size of crankshaft depend on the number and arrangement of cylinders. It is usually made of steel forging, but some makers use special types cast-iron such as spheroid graphitic or nickel alloy castings which are cheaper to produce and have a good service life.
6. Timing Gears
The timing gear is connected by a chain, gears, or a belt to the crankshaft at one end and the camshaft on the other. The crankshaft drives the camshaft and the gear train controls valve timing in an internal-combustion engine.
7. FlyWheel
A flywheel is secured on the crankshaft. The main function of a flywheel is to rotate the shaft during preparatory stoke. It is also made crankshaft rotation more uniform.
8. Front/Rear Crank Oil Seal
There are two crankshaft seals, one in the front and one in the back, which are known as the front main and rear main seals respectively. Since the crankshaft needs to be lubricated, there are seals on both ends of the crankshaft that keep the oil from escaping.
9. Oil Pump
An engine needs oil to lubricate moving parts, prevent corrosion, collect dirt and sludge, and absorb some of the heat generated by a running engine. The oil pump provides the force that delivers oil through galleries and passages around the engine.
10. Oil Strainer
It is used to strain oil which is supplied in the engine.
11. Oil Filter
Oil filter - as the name implies - is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Oil filters are used in many different types of machinery. Of our interest, in particular, is the use of the oil filter in internal-combustion engines in motor vehicles.
14. Pressure Plate.
The cylinder is a part in which the intake of fuel, compression of fuel and burning of fuel take place. The main function of the cylinder is to guide piston.
A piston is fitted to each cylinder as a face to receive gas pressure and transmit the thrust to the connecting rod. It is a prime mover in the engine. The main function of piston is to give tight seal to the cylinder through the bore and slide freely inside of a cylinder. The piston should be light and sufficiently strong to handle the gas pressure generated by the combustion of fuel. So the piston is made by aluminium alloy and sometimes it is made by cast iron because light alloy piston expands more than cast iron so they need more clearances to the bore.
3. Piston Ring
A piston must be a fairly loose fit in the cylinder so it can move freely inside the cylinder. If the piston is a too-tight fit, it would expand as it got hot and might stick tight in the cylinder and if it loses it would leak the vapour pressure. To provide a good sealing fit and less friction resistance between the piston and cylinder, the piston is equipped with piston rings. These rings are fitted in grooves which have been cut in the piston. They are split at one end so they can expand or slipped over the end of the piston. A small two-stroke engine has two piston rings to provide good sealing but in the four-stroke engine has an extra ring which is known as oil ring. Piston rings are made of cast iron of fine grain and high elastic material which is not affected by the working heat. Sometimes it is made by alloy spring steel.
Connecting rod connects the piston to the crankshaft and transmits the motion and thrust of piston tp crankshaft. It converts the reciprocating motion into rotary motion of the crankshaft. These are two end of connecting rod one is known as a big end and the other is a small end. The big end is connected to the crankshaft and small end is connected to the piston by use of piston pin. The connecting rod is made of nickel, chrome, and chrome vanadium steels. for small engines, the material may be aluminium.
The crankshaft of an internal combustion engine receives the efforts or thrust supplied by the piston to the connecting rod converts the reciprocating motion of the piston into rotary motion of the crankshaft. The crankshaft mounts in bearing so it can rotate freely. The shape and size of crankshaft depend on the number and arrangement of cylinders. It is usually made of steel forging, but some makers use special types cast-iron such as spheroid graphitic or nickel alloy castings which are cheaper to produce and have a good service life.
6. Timing Gears
The timing gear is connected by a chain, gears, or a belt to the crankshaft at one end and the camshaft on the other. The crankshaft drives the camshaft and the gear train controls valve timing in an internal-combustion engine.
7. FlyWheel
A flywheel is secured on the crankshaft. The main function of a flywheel is to rotate the shaft during preparatory stoke. It is also made crankshaft rotation more uniform.
There are two crankshaft seals, one in the front and one in the back, which are known as the front main and rear main seals respectively. Since the crankshaft needs to be lubricated, there are seals on both ends of the crankshaft that keep the oil from escaping.
An engine needs oil to lubricate moving parts, prevent corrosion, collect dirt and sludge, and absorb some of the heat generated by a running engine. The oil pump provides the force that delivers oil through galleries and passages around the engine.
It is used to strain oil which is supplied in the engine.
Oil filter - as the name implies - is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Oil filters are used in many different types of machinery. Of our interest, in particular, is the use of the oil filter in internal-combustion engines in motor vehicles.
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12. Oil Gallery
Oil gallery is a gallery in the engine which is used to supply oil to different parts of the engine.
13. Dip Stick It is used to check the oil level in the oil sump.
The functional purpose of pressure plates Clutches, within their function as the link between the engine and the gearbox, transfer the torque moment generated by the engine to the gearbox. The pressure plate, which is bolted onto the flywheel, presses the clutch plate against the friction plate.
15. Clutch Plate
The function of the Clutch. Function of transmitting the torque from the engine to the drivetrain. Smoothly deliver the power from the engine to enable smooth vehicle movement.
16. Clutch Release Bearing
It is a part inside the transmission bell housing actuated by the clutch fork that pushes on the pressure plate diaphragm springs to release the clutch engagement. On hydraulic clutch systems, this is sometimes integrated with the hydraulic release mechanism. Also known as a throwout bearing.
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