What Are the Different Motorcycle Mechanic Jobs?

A two-wheeled or tricycle driven by a gasoline engine and steering the front wheels by a handlebar. Lightweight and flexible, driving fast. Widely used in patrol, passenger and cargo transportation, etc., also used as sports equipment. The number of motorcycles in the United States has increased by 34% since 1998.

How motorcycles work

The working process of the two-stroke engine is as follows:

1.The piston moves the mixed air into the crankcase.

2. The piston moves the mixed gas pressure to the combustion chamber to complete the first compression.

3. After the mixed gas arrives at the cylinder, the piston moves upward and the inlet and exhaust ports are closed. When the piston compresses the gas to the minimum volume (this is the second compression), the spark plug ignites.

4. The pressure of combustion pushes the piston down. When the piston descends to a certain position, the exhaust port opens first, the exhaust gas is sent out and then the intake port opens. The new mixture enters the cylinder to squeeze out the remaining exhaust gas.

At the same speed, the two-stroke engine fires once more than the four-stroke engine, so it has more power, and the two-stroke engine is also much lighter than the four-stroke engine with the same displacement, so the two-stroke engine has an overwhelming advantage in racing. However, since the intake and exhaust of the two-stroke engine are performed at the same time, when the engine speed is low, because the exhaust port is opened for a long time, a part of the fresh air mixture is exhausted from the exhaust port together with the exhaust gas, so The power is not high at the bottom speed. The new two-stroke engine has added some components to improve this problem, such as YAMAS 'YPVS, HONDA's ATAC SUZUKID SAEC. Due to the carbon deposits generated by the combustion engine oil and the intake and exhaust holes on the cylinder wall, the wear of the two-stroke engine is much faster than that of the four-stroke engine.

The working principle of a four-stroke engine. A four-stroke engine has a wide range of uses. A four-stroke engine means that the cylinder ignites once every four reciprocating movements of the piston. The specific working principle is as follows:

1. Intake: At this time, the intake valve opens, the piston goes down, and the mixture of gasoline and air is sucked into the cylinder.

2. Compression: At this time, the intake valve and exhaust valve are closed at the same time, the piston moves upward, and the mixture is compressed.

3. Combustion: When the mixer is compressed to the minimum, the spark plug will ignite the mixed gas, and the pressure generated by the combustion will push the piston down and drive the crankshaft to rotate.

4. Exhaust: When the piston descends to the lowest point, the exhaust valve opens and exhaust gas is discharged, and the piston continues upward to exhaust excess exhaust gas.

The working principle of a two-stroke engine As the name suggests, a two-stroke engine is a piston that moves two strokes up and down, and the spark plug ignites once. The intake process of the two-stroke engine is completely different from that of the four-stroke engine. The two-stroke engine undergoes two compressions. On the two-stroke engine, the mixture first flows into the crankcase and then into the cylinder. Exactly, it should flow into the combustion chamber. The four-stroke engine's mixture flows directly into the cylinder. The four-stroke engine's crankcase is used to store oil. The two-stroke engine cannot store oil because the crankcase is used to store the mixture. Recycled burner oil.

Power knowledge:

The horsepower was originally developed by the French and Germans, but because they measure horsepower, the horse is a smaller pony than the average horse. Therefore, with a 50-horsepower engine, you cannot imagine a 50-horsepower pull. Driving on a motorcycle should be imagined that 35 horses are more suitable. (Ps) is the first symbol used by Germans to represent horsepower units, and has been used until now.

What is 1 horsepower? 1 horsepower is the force that pulls an object weighing 75 kilograms (kg) by 1 meter (m) in 1 second, which is called 1 horsepower. : 70ps / 8000 rpm, which means that the engine can produce 70 horsepower at 8000 rpm.

rpm is the English abbreviation for engine revolutions per minute.

What is torque? Torque is also called torque. It is the torque that rotates the shaft. The common unit of torque in XXX is kg-m, (the international unit is Nm).

In order to better understand the concept of torque, here are some examples. For example: use a screwdriver or wrench to tighten the screw. If the length of the screwdriver or wrench is 1m, add 1kg of force to one end of the screwdriver or wrench, and then tighten the screw 1kg-m. If the length of the driver or wrench is 0.5m, in order to obtain a torque of 1kg-m, a force of 2kg must be applied. The reverse is also true. If the driving torque is the same, the farther away from the center of rotation, The smaller the force.

How is the displacement calculated? Cylinder bore-the diameter of the cylinder is referred to as the cylinder bore for short.

Stroke --- The piston reciprocates in the cylinder. When the piston runs from top dead center (TDC) to bottom dead center (BDC), the distance traveled is called the piston stroke, or stroke or stroke for short.

(Now take the Honda CBR600RR in 2003 as an example, engine form: water-cooled four-stroke parallel four-cylinder 16-valve DOHC engine as an example:

Bore (67.0mm) and stroke (42.5mm)

Calculation method of exhaust volume:

Set the cylinder sectional area X stroke X number of cylinders = total exhaust cc

Stroke ------ 42.5mm = 4.25cm

Bore size ------ 67.0mm = 6.7cm

Section area ---- 3.35 X 3.35 X 3.1416 = 35.25

Section area 35.25 X stroke 4.25 X number of cylinders 4 = total displacement 599cc

The working principle of a four-stroke engine. A four-stroke engine has a wide range of uses. A four-stroke engine means that the cylinder ignites once every four reciprocating movements of the piston. The specific working principle is as follows:

1. Intake: At this time, the intake valve opens, the piston goes down, and the mixture of gasoline and air is sucked into the cylinder.

2. Compression: At this time, the intake valve and exhaust valve are closed at the same time, the piston moves upward, and the mixture is compressed.

3. Combustion: When the mixer is compressed to the minimum, the spark plug will ignite the mixed gas, and the pressure generated by the combustion will push the piston down and drive the crankshaft to rotate.

4. Exhaust: When the piston descends to the lowest point, the exhaust valve opens and exhaust gas is discharged, and the piston continues upward to exhaust excess exhaust gas.

The working principle of a two-stroke engine As the name suggests, a two-stroke engine is a piston that moves two strokes up and down, and the spark plug ignites once. The intake process of the two-stroke engine is completely different from that of the four-stroke engine. The two-stroke engine undergoes two compressions. On the two-stroke engine, the mixture first flows into the crankcase and then into the cylinder. Exactly, it should flow into the combustion chamber. The four-stroke engine's mixture flows directly into the cylinder. The four-stroke engine's crankcase is used to store oil. The two-stroke engine cannot store oil because the crankcase is used to store the mixture. Recycled burner oil.

The working process of the two-stroke engine is as follows:

1.The piston moves the mixed air into the crankcase.

2. The piston moves the mixed gas pressure to the combustion chamber to complete the first compression.

3. After the mixed gas arrives at the cylinder, the piston moves upward and the inlet and exhaust ports are closed. When the piston compresses the gas to the minimum volume (this is the second compression), the spark plug ignites.

4. The pressure of combustion pushes the piston down. When the piston descends to a certain position, the exhaust port opens first, the exhaust gas is sent out and then the intake port opens. The new mixture enters the cylinder to squeeze out the remaining exhaust gas.

At the same speed, the two-stroke engine fires once more than the four-stroke engine, so it has more power, and the two-stroke engine is also much lighter than the four-stroke engine with the same displacement, so the two-stroke engine has an overwhelming advantage in racing. However, since the intake and exhaust of the two-stroke engine are performed at the same time, when the engine speed is low, because the exhaust port is opened for a long time, a part of the fresh air mixture is exhausted from the exhaust port together with the exhaust gas, so The power is not high at the bottom speed. The new two-stroke engine has added some components to improve this problem, such as YAMAS 'YPVS, HONDA's ATAC SUZUKID SAEC. Due to the carbon deposits generated by the combustion engine oil and the intake and exhaust holes on the cylinder wall, the wear of the two-stroke engine is much faster than that of the four-stroke engine.

Motorcycles have gone through hundreds of years of ups and downs, and they are moving towards newer, faster and safer directions.

The modern motorcycle industry has introduced a large number of advanced technologies. For example, the FLHRC-1 motorcycle introduced by Harley-Davidson in 1998, the engine uses the world's top automotive engine technology-fuel injection device, which not only improves the power performance, but also more suitable for the environmental protection needs of contemporary society. It has become a 21st century motorcycle Forerunner.

The use of high-tech technologies such as optical communication electronic control systems, radar ranging automatic control systems, electronic map guidance systems, and acoustic electronic muffler systems in some concept motorcycles has made modern motorcycles more perfect and more shocking. . Of course, no matter how it changes, we can all see the shadow of Dais car a century ago. At this point, Daimler should be very relieved.

Introduction to motorcycles I. Motorcycles Generally speaking, motorcycles are divided into street cars, road motorcycles, off-road motorcycles, cruisers, and station wagons. Second, sports motorcycle sports motorcycle is also called sports car. Its leading design idea is for people to take a leisure vacation, it is a fun means of transportation, but also a fun tool to experience the joy of life. Sports motorcycles include a very wide range. The super sports motorcycles and touring motorcycles introduced below have the functions of sports motorcycles, so they can also be classified as sports motorcycles.

1. Road motorcycles are mainly used on paved roads called road motorcycles. Road motorcycles can be divided into three categories, namely super sports motorcycles, touring motorcycles and American motorcycles. Since this motorcycle is mainly on a flat paved road, it is also called an urban motorcycle. The concept and scope of road motorcycles are also very ambiguous. In fact, it may be better to call them ordinary motorcycles. Structurally, road motorcycles are only suitable for paved roads. Such motorcycles can achieve the best performance on paved roads. On the contrary, many difficulties will occur when driving on roadless areas. Corresponding to it are off-road motorcycles, which are classified according to the use area, and can also be divided into traveling off-road motorcycles and urban off-road motorcycles.

2. Super sports motorcycles General motorcycles attach great importance to the comfort and ease of operation when driving. Super sports motorcycles are different. It pays more attention to the high-speed performance of motorcycles. By riding this motorcycle, the rider can fully feel the thrill and fun when the engine, tires and road surface change. It is different from racing, it pursues the youthful dynamic when riding, instead of blindly pursuing high speed like racing. Without a certain high-speed performance guarantee, it is difficult for riders to experience this thrill, so the speed of motorcycles must be increased. But once you get the thrill of riding, you don't have to increase the speed.