Eng. Ayang Chol Mojwok

17/09/2024

-stroke (also four-cycle) engine:-
is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed:

1-Intake: Also known as induction or suction. This stroke of the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.). In this stroke the intake valve must be in the open position while the piston pulls an air-fuel mixture into the cylinder by producing a partial vacuum (negative pressure) in the cylinder through its downward motion.

2-Compression: This stroke begins at B.D.C, or just at the end of the suction stroke, and ends at T.D.C. In this stroke the piston compresses the air-fuel mixture in preparation for ignition during the power stroke (below). Both the intake and exhaust valves are closed during this stage.

3-power: Also known as Combustion or ignition. This is the start of the second revolution of the four stroke cycle. At this point the crankshaft has completed a full 360 degree revolution. While the piston is at T.D.C. (the end of the compression stroke) the compressed air-fuel mixture is ignited by a spark plug (in a gasoline engine) or by heat generated by high compression (diesel engines), forcefully returning the piston to B.D.C. This stroke produces mechanical work from the engine to turn the crankshaft.

4-Exhaust: Also known as outlet. During the exhaust stroke, the piston, once again, returns from B.D.C. to T.D.C. while the exhaust valve is open. This action expels the spent air-fuel mixture through the exhaust port.
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engineering
Eng. Ayang Chol Mojwok

15/09/2024

block - also known as a cylinder block - contains all of the major components where the combustion process takes place in a reciprocating engine. Usually made from an aluminium alloy (cast iron in older engines), it houses the cylinders and their components, the water cooling system and the crankcase

What is the purpose of the cylinder block?

The cylinder block is one of your engine's central components. It plays a key role in the lubrication, temperature control and stability of the engine and it has to be of the highest quality.
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Eng. Ayang Chol Mojwok

15/09/2024

Day for remember 🥀✨

14/09/2024

Motor:-
What is the function of a motor starter?

A motor starter is an electrical device that is used to start & stop a motor safely. Like a relay, the motor starter switches the power ON/OFF, but unlike a relay, it also provides thermal overcurrent protection. The main

How do starter motors work?

The housing holds the starter fields in the housing with screws. This can consist of two to four field coils connected in series. Energised by the battery this converts the coils into an electromagnet which then turns the armature. When the armature coils are powered a magnetic field is created around the armature.

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Eng. Ayang Chol Mojwok 🇸🇸✌🏾

13/09/2024

Alternator
it's the one of the mechanic parts converts mechanical energy to electrical energy with an alternating current. The stator and rotor inside the alternator work as magnets and rotate to generate the alternating current. Then the alternating current(AC) is transformed into a direct current(DC) that charges the battery.

Eng. Ayang Chol Mojwok

13/09/2024

12/09/2024

Piston Moving

12/09/2024

Classic Mechanical workshop

02/02/2024

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