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List of contents in this article:

• 1, What are the movement characteristics of the rotor engine
• 2, Junior high school physics about the working principle of the engine
• 3, What is the difference between a rotor engine and an ordinary piston engine?
• 4, What are the disadvantages of the rotor engine
• 5, About the structure and working principle of the rotor engine
• 6  、 What is a rotor engine? And why is the use of this high-performance engine prohibited in F1?

What are the movement characteristics of the rotor engine

The movement characteristics of the rotor engine are that while the center of the triangular rotor rotates around the center of the output shaft, the triangular rotor itself revolves around its center. Self-turning.

Features of rotor engine The rotor engine can directly convert the combustion expansion force of combustible gas into driving torque. Compared with reciprocating engines, rotor engines eliminate useless linear motion, so rotor engines of the same power are smaller in size, lighter in weight, and have lower vibration and noise.

The rotor has the characteristics of small size, relatively simple structure, good acceleration performance and stable operation. Because the rotor engine rotates and does not reciprocate like ordinary piston engines (except for the star engine of the aircraft), its vibration is much smaller and the volume is easy to control.

Small and stable. High efficiency. The disadvantage is that the sealing problem in the cylinder has not been well solved. The technology is very difficult.

Junior high school physics about the working principle of the engine

Engine braking refers to lifting the accelerator pedal but not leaving the engine, using the compression resistance, internal friction and intake and exhaust resistance generated by the compression stroke of the engine. The force forms a braking effect on the driving wheel.

Most piston aviation engines are four-stroke engines, that is, one cylinder completes a working cycle, and the piston undergoes four strokes in the cylinder, which are intake stroke, compression stroke, expansion stroke and exhaust stroke.

Combustion chemical principle: After mixing gasoline or diesel with air, it burns in the cylinder, emits heat and chemical energy, drives the piston movement, and drives the crankshaft to rotate. Principle of thermodynamics: When the engine burns inside, high-temperature and high-pressure gas is produced, and there is a thermodynamic relationship between the temperature, pressure and volume of the gas.

The working principle of the engine is air intake-compression-fuel injection-combustion-expansion work-exhaust. The following is the working process of the engine: in the intake stroke, the working quality entering the cylinder is pure air. Due to the low resistance of the intake system of the diesel engine, the pressure of the intake terminal PA=(0.85~0.95) P0 is higher than the gasoline engine.

Engine working principle: intake stroke, compression stroke, working stroke, exhaust stroke.

As shown in Figure (1), the first step of the engine is the intake stroke, that is, to provide sufficient combustible mixed gas (or fresh air) into the cylinder. At the beginning of the intake stroke, the crankshaft rotates to drive the piston from the upper stop point to the lower stop point. At this time, the exhaust valve is closed and the intake valve is opened.

What is the difference between a rotor engine and an ordinary piston engine?

1. The difference between the rotor engine and the traditional reciprocating engine: the expansion pressure is different: the expansion pressure of the rotor engine is on the side of the rotor, and the three sides of the rotor are pushed to the center of the eccentric shaft; the expansion pressure of the reciprocating engine is pushed down, and the mechanical force is transmitted to the connecting rod to drive the crankshaft to rotate.

2. Different properties: rotor engines rely on the expansion pressure generated by air-fuel mixed gas combustion to obtain rotational power. An engine is a machine that can convert other forms of energy into mechanical energy. For example, an internal combustion engine usually converts chemical energy into mechanical energy.

3. There are the following differences: there are fewer moving parts. Compared with the four-stroke piston engine, the rotor engine has much fewer moving parts. The dual-rotor engine has three main moving parts: two rotors and one output shaft.

What are the disadvantages of the rotor engine

High fuel consumption and heavy pollution. Because there is no high compression ratio of the reciprocating engine, the combustion is not sufficient.

The parts are severely worn and the service life is short. Because there is only one radial seal between the adjacent chambers of the triangular rotor engine, the radial seal is always in contact with the cylinder block line, and the position of contact with the cylinder block is always changing, so the three combustion chambers are not completely isolated, and the radial seal wears out quickly.

The fuel consumption of the rotor engine is relatively high: this is mainly because the shape of the combustion chamber of the rotor engine is not conducive to complete combustion, and the flame propagation path is long, which increases the consumption of fuel and oil. Moreover, the rotor engine can only use the ignition type, not the compressed combustion type, so it is impossible to use diesel.

Disadvantages: The fuel consumption of the rotor engine is relatively high, mainly because the shape of the rotor engine combustion chamber is not conducive to complete combustion, and the flame propagation path is long, which increases the consumption of fuel and oil.

About the structure and working principle of the rotor engine

1. The rotor structure and working principle The rotor engine consists of three key parts: compressor, combustion chamber and turbine. First, the air passes through the compressor, and the rotating rotor compresses and accelerates the air.When the air enters the combustion chamber, the fuel injector injects in, ignites combustion, and releases high-temperature and high-pressure gas.

2. Rotor The role of the rotor is like a piston and connecting rod in a reciprocating engine. In terms of appearance, in order to make the shape of the inner package route, it is designed as a triangular cone (the groove on the side is related to the compression ratio). According to the state of rotation, the intake and exhaust port will automatically open and close, so It has the function of inlet and exhaust door.

3. First of all, the rotation angle of each process: the reciprocating engine rotates 180 degrees, while the rotor engine rotates 270 degrees, which is 5 times that of the reciprocating engine.

4. Working principle: Modern rotor engines are composed of a cocoon-shaped shell (a triangular rotor is placed in it). The space between the rotor and the housing wall is used as an internal combustion chamber, which drives the rotor to rotate through the pressure of gas expansion.

5. Generally, the engine is a reciprocating motion engine. When working, the piston makes a reciprocating linear motion in the cylinder. In order to convert the linear motion of the piston into a rotary motion, the crank connecting rod mechanism must be used. The rotor engine is different. It directly converts the combustion expansion force of combustible gas into driving torque.

The following is an introduction to the reasons for the prohibition of Mazda's rotor engine: the uniqueness of the rotor engine: unlike the traditional revolving plug engine, the rotor engine abandons the reciprocating linear motion and directly promotes the triangular rotor rotation through gas thrust.

Our general turbocharged engines and naturally aspirated engines carry out reciprocating motion, and the piston makes a reciprocating linear motion in the cylinder.