AUTOCARE: ENGINE COMPONENT 2
Engine component II
Crank and Crankshaft
The crankshaft is called the backbone of an engine because it converts the reciprocating motion of piston into the rotary motion of the crankshaft. The crankshaft is a single casted unit and is made of drop-forged steel main journals which are placed and supported in the crank case. The main journal and connecting journals are machined to a smooth finish to reduce friction and shell bearings are used for smooth rotation of crankshaft. Front end of the crankshaft will transmit drive to the camshaft and also to the timing gear, whereas the flywheel is bolted to the flange at rear end of the crankshaft. Main journal of the crankshaft carries the oil passages to lubricate shell bearings. In case of a single cylinder engine crank assembly is used, two crank webs are connected with the crank pin, and crank webs shafts are press fitted in both. At one side of the shaft magneto is fastened whereas clutch assembly is mounted to the other. The crank assembly is balanced dynamically as well as statically for the smooth transmission of power.
Flywheel
It is a wheel mounted on the crankshaft which stores the energy during the power stroke and transmits the energy to the transmission system, the clutch and then to the gear
box.
Camshaft
The major function of the camshaft is to operate the intake and exhaust valves through the cam lobe, the gear drive transmits the power for the rotation of oil pump, therefore the oil pump sucks the oil from the oil sump and transits the same to the oil gallery. The camshaft is driven by crankshaft at half the speed of the crankshaft.
Inlet Manifold
The fuel air mixture
is carried from the carburettor to the cylinder through a separate pipe through inlet manifold in a carbureted engine. Whereas in compression ignition engines (diesel), the air is sucked through the induction manifold. In M.P.F.I the engine holds the throttle body on top of the manifold and the supply of air is monitored by the throttle body sensor
Exhaust Manifold
It is a set of pipes and muffler, which is used to remove the exhaust gases from the exhaust ports. Engines oxygen sensors and catalic convertors are used to reduce sound and air pollution, respectively
Radiator
The major function of the radiator is to radiate the heat from the coolants. It has two tanks located at the top and bottom. The upper tank is connected to the lower tank with the core through the passages for easy radiation of the heat. The radiator also stores the coolant
Head Gasket
A head gasket is a gasket that sits between the engine block and cylinder head(s) in an internal combustion engine.
Its purpose is to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders; as such, it is the most critical sealing application in any engine, and, as part of the combustion chamber, it shares the same strength requirements as other combustion chamber components.
Crank and Crankshaft
The crankshaft is called the backbone of an engine because it converts the reciprocating motion of piston into the rotary motion of the crankshaft. The crankshaft is a single casted unit and is made of drop-forged steel main journals which are placed and supported in the crank case. The main journal and connecting journals are machined to a smooth finish to reduce friction and shell bearings are used for smooth rotation of crankshaft. Front end of the crankshaft will transmit drive to the camshaft and also to the timing gear, whereas the flywheel is bolted to the flange at rear end of the crankshaft. Main journal of the crankshaft carries the oil passages to lubricate shell bearings. In case of a single cylinder engine crank assembly is used, two crank webs are connected with the crank pin, and crank webs shafts are press fitted in both. At one side of the shaft magneto is fastened whereas clutch assembly is mounted to the other. The crank assembly is balanced dynamically as well as statically for the smooth transmission of power.
Flywheel
It is a wheel mounted on the crankshaft which stores the energy during the power stroke and transmits the energy to the transmission system, the clutch and then to the gear
box.
Camshaft
The major function of the camshaft is to operate the intake and exhaust valves through the cam lobe, the gear drive transmits the power for the rotation of oil pump, therefore the oil pump sucks the oil from the oil sump and transits the same to the oil gallery. The camshaft is driven by crankshaft at half the speed of the crankshaft.
Inlet Manifold
The fuel air mixture
is carried from the carburettor to the cylinder through a separate pipe through inlet manifold in a carbureted engine. Whereas in compression ignition engines (diesel), the air is sucked through the induction manifold. In M.P.F.I the engine holds the throttle body on top of the manifold and the supply of air is monitored by the throttle body sensor
Exhaust Manifold
It is a set of pipes and muffler, which is used to remove the exhaust gases from the exhaust ports. Engines oxygen sensors and catalic convertors are used to reduce sound and air pollution, respectively
Radiator
The major function of the radiator is to radiate the heat from the coolants. It has two tanks located at the top and bottom. The upper tank is connected to the lower tank with the core through the passages for easy radiation of the heat. The radiator also stores the coolant
Head Gasket
A head gasket is a gasket that sits between the engine block and cylinder head(s) in an internal combustion engine.
Its purpose is to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders; as such, it is the most critical sealing application in any engine, and, as part of the combustion chamber, it shares the same strength requirements as other combustion chamber components.
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