The chain saw uses a two-stroke, single-cylinder, forced air-cooled gasoline engine as the power to complete the sawing work through the high-speed operation of the chain saw chain. Let's understand how the chain saw achieves the high speed operation of the saw chain. First, the structure of the chain saw Second, the working principle of the chain saw Concerned about surprises Previous: A saw saws all in the hand saw! Woodworking preferred adjustable small steel Next: How to do glass water filling machine to save money and not to see Solar LED Street Light has become an increasingly popular way of providing energy-efficient lighting for public spaces and roads. As the name suggests, solar street lamps are powered by solar panels that collect energy from the sun during the day, which is then stored in rechargeable batteries. This energy is then used to power LED lights, which can provide bright and long-lasting lighting for up to 12 hours without any additional power source. With the inclusion of various features such as motion sensors, solar induction street lights and more, these solar powered street lights have proven to be an effective solution for reducing energy consumption and carbon footprint. Let us dive deeper into the discussion and learn more about the benefits of this amazing technology. solar street lamp,solar powered street lights, solar induction street lamp,solar street light with motion sensor Ningbo Le Monde Import & Export Co., Ltd. , https://www.lemondelighting.com
As a whole system, the chain saw is divided into an ignition system, a fuel supply system, an intake and exhaust system, a lubrication system, a cooling system, and a starting system.
The cylinder is the core component of the chain saw, including the inner wall, the heat sink, the combustion chamber, etc. The cylinder has three holes, namely an air inlet hole, a gas exhaust hole and a ventilation hole, which are respectively closed by the piston at a certain time. The complete sealing of the cylinder is a necessary condition for the continuous operation and power generation of the chain saw. The cylinder is mounted on the crankcase. The piston reciprocates within the cylinder and closes the cylinder from the lower portion of the cylinder to form a sealed space. The fuel burns in the sealed space and the power generated pushes the piston. The reciprocating motion of the piston pushes the crankshaft for rotary motion through the connecting rod, and the crankshaft then outputs power from the flywheel end.
The crank linkage is composed of a piston set, a connecting rod, a crankshaft and a flywheel, which is the main part of the power transmission of the chain saw.
The piston group is composed of a piston, a piston ring, a piston pin and the like. The piston has a cylindrical shape and is provided with a piston ring thereon, thereby sealing the cylinder when the piston reciprocates to prevent gas leakage in the cylinder. The piston pin has a cylindrical shape that penetrates into the pin hole in the piston and the small end of the connecting rod to connect the piston and the connecting rod.
The connecting rod is divided into a big end, a small end and a shaft. The large end is connected to the crank pin of the crankshaft, and the small end is connected to the piston pin. When the connecting rod works, the small end end reciprocates with the piston, and the large end end rotates with the crank pin around the axis of the crankshaft, and the shaft body performs a complicated rocking motion.
The function of the crankshaft is to convert the reciprocating motion of the piston into a rotary motion, and the work done by the expansion stroke is transmitted through a flywheel mounted on the rear end of the crankshaft. The flywheel stores energy, allowing the other strokes of the piston to work properly and evenly rotating the crankshaft.
The intake and exhaust system usually consists of an air cleaner, an intake pipe, an exhaust pipe, and a muffler.
In order to supply fuel into the cylinder, the chain saw is provided with an oil supply system. The air and fuel are mixed at a certain concentration by a carburetor installed at the inlet end of the intake pipe, and then supplied to the cylinder through the intake pipe, and the electric spark timing controlled by the oil saw ignition system is ignited.
When the fuel in the oil saw cylinder is burned, parts such as pistons and cylinders are heated, and the temperature thereof rises. In order to ensure the normal operation of the chain saw, parts such as pistons and cylinders are not damaged by overheating, and a cooling system is required. The flywheel blades and the wind passage formed by the starter cover, the outer casing and the like constitute a cooling system of the chain saw.
The chain saw cannot be turned into the running state from the parking state, and the crankshaft must be turned by an external force to start it. This device that generates an external force is called a starting device. 
In order for the chain saw to work continuously, the piston must return to its original position after pushing the crankshaft to push the crankshaft again, which requires the piston to reciprocate in the cylinder. The piston moves from one end of the cylinder to the other end of the cylinder and is called a stroke.
The working cycle of the chain saw consists of air intake, compression, combustion and expansion, and exhaust.
The first stroke: the piston moves upward from the bottom dead center, the intake hole, the exhaust hole and the ventilation hole on the cylinder are simultaneously closed, and the mixture entering the cylinder is compressed; the piston continues to move upward to further compress the mixture, and the intake air The hole will move out as the piston moves up, and the combustible mixture now flows into the crankcase through the piston.
Second stroke: When the piston is compressed near the top dead center, the spark plug just jumps, igniting the combustible mixture, and the gas expansion pushes the piston down to work. As the piston moves down, the intake hole closes, and the combustible mixture enclosed in the crankcase is compressed; when the piston approaches the bottom dead center, the exhaust hole opens, and the exhaust gas is flushed out due to strong pressure; then the air exchange opening is opened, The pre-compressed combustible mixture is flushed into the cylinder through the ventilation passage to drive off the exhaust gas and perform the ventilation process.
The exhaust process and the intake process of the chain saw are collectively referred to as the ventilation process. The function of the gas exchange is to remove the exhaust gas from the previous cycle, so that the cycle supplies fresh gas so that as much fuel as possible is completely burned in the cylinder. To make the chain saw reach greater power. The quality of the ventilation process directly affects the use of the chain saw. We should reduce the flow resistance of the intake and exhaust systems, so it is necessary to periodically clean the carbon deposits and clean the air filter. 