Four Stroke Cycle

Four Stroke Cycle has the following parts air and fuel, intake valve, spark plug, exhaust valve, combustion chamber, piston and crankshaft.

Four Stroke Cycle has four stroke mainly intake stroke, compression stroke, power stroke and exhaust stroke.

Intake stroke is when piston move downward from top dead center to bottom dead center producing a suction force to draw air and fuel mixer to inter in cylinder from carburetor. The intake  valve is open allowing mixture of fuel get into cylinder. The exhaust valve is close to let only mixture get in.

Compression stroke is when the piston moves upward from bottom dead center to top dead center pushing the air and fuel mixture to get into a small space to prepare for combustion. The intake and exhaust valves are both close to ensure that no mixture of fuel escape from cylinder. At the end of this stroke, the spark plug delivers spark to ignite the fuel mixture until compression ends. In diesel engine, purely air is compressed to raise temperature and diesel fuel is injected at end of the stroke.

Power stroke is when the piston moves downward from top dead center to bottom dead center cause by the pressure produce by combustion or burning of fuel mixture. This is the source of power of an engine. The intake and exhaust valve are both close that no power can escape from the cylinder. Leakage of power during this stroke result to a low performance engine or lack of power.

Exhaust stroke when the piston moves upward from bottom dead center to top dead center pushing the burned gasses to get out of the cylinder. The intake valve is close and exhaust valve is open making a away for the exhaust gas to get out. At exactly end of this stroke, exhaust valve closes.

Parts of Whole Assembly Engine

Parts that composed the whole assembly of an engine are

Valves
Valve Spring
Valve Guide with Seal
Valve Spring Retainer
Rocker Arm
Push Rod
Camshaft
Cam Follower
Cylinder Head Gasket
Valve Seat Tensioner
Chain and Sprocket
Chain
Rocker Arm Cover
Piston
Piston Rings
Bearings
Connecting Rod
Piston Pin
Crankshaft
Flywheel
Oil Pump
Oil Seal
Oil Filter
Oil Strainer
Dip Stick
Water Pump
Fuel Pump
Intake Manifold
Exhaust Manifold
Cylinder Head Bolt
Ignition Coil
Contact Point
Distributor
Spark Plug
Starter Motor

Engine Parts

Engine is a device that can convert chemical energy to mechanical energy. Since this device works mechanically, it composed of several parts that work together during the operation. Parts are either stationary or non stationary, meaning some parts are moving and some are not moving. There are also parts that are fixed to the body yet have the vital role for engine operation. Engine can be divided into three main parts, the cylinder head block, cylinder block and oil pan. This means  an engine can be disassembled into three divisions. Each main part have several parts are attached to form as an assembly.

Cylinder block is the foundation of the engine. It is mostly made of cast iron or iron mixed with other metals such as nickel and chromium. Cylinder block has large holes for the cylinder bores. Attached to the block is the crankshaft, connecting rod, piston with rings, oil pump, water pump, timing gears, flywheel, bearings, oil seals, piston liners, camshaft in some engine and drilled oil passages with oil filter.

Cylinder head block is made of cast from cast iron or aluminum alloy. Parts attached to cylinder head block are valves, valve spring, valve guide, valve seat, rocker arm assembly, intake manifold, exhaust manifold, overhead camshaft, spark plug, fixed machined or drilled parts like water jackets, oil galleries, intake and exhaust ports.

Oil pan is made of plastic or metal. Pan is shape to fit the bottom of the cylinder block. Oil strainer and oil drain plug are attached to this part.

Automotive

Automotive industry is been a part of human lives. Considering the contribution of automotive industry to our daily living and in the development of the community. It seems impossible that this industry will be out of existence for the coming years. Instead this industry will be developed to provide more comfort and safety and environmentally friendly to be a better partner of human living.

Automobile can be defined as a land vehicle or carriage moving along the road through its wheels and used to transport or transfer people, goods, merchandise from one place to another. Some are used in earth moving works like construction of roads, building and establishments.