Study of the effect of the slit between the piston ring and the cylinder on the engine indicators in engines

STUDY OF THE EFFECT OF THE SLIT BETWEEN THE PISTON RING AND THE CYLINDER ON THE ENGINE INDICATORS IN ENGINES


Patidinov Aslidin Xusniddin O’g’li
Master Of The Andijan Machine Building Institute


Annotation. Reliable and long-term operation of internal combustion engines depends on their technical condition. The consumption of fuel and oil, the purity of the gases produced, the timely output to the specified power and the good mileage are the magnitude that determines the technical condition of the engine. In many ways, the presence of these sizes in the prescribed norm is determined by the porcelain rings.
This means that studying the impact of the slit between the piston rings and the cylinder on the engine indicators and developing the necessary recommendations is one of the most necessary and solvable problems today.
In this article, the purpose of the study is to justify how the slit between the ring and the cylinder affects the engine performance and to find constructive solutions to the problem. As indicators, engine power, fuel consumption and oil burn were selected.
As an object of the study, the engine of the Spark M300 car and the D - 21A engines were selected.
Keywords: cylinder, motor, diesels, combustion chamber, compression level, fuel type, temperature.
INTRODUCTION
During the operation of the engine, the piston is rubbed against the cylinder wall during the roll-back movement. Where there is friction, there is definitely decay. If we observe that the cylinder wall is eroded, we can see that it is oval-shaped eroded. The main reason for this is the fact that the porcelain moves oscillatory in relation to the axis of its finger. Because in this direction there is no limit to the movement of porcelain. As a result of this, the cylinder is eaten Oval, forming a slit that is difficult for the porcelain ring to clog. In some literature, the appearance of a slit is written as the result of deformation(Figure 1). That is, the heated ring is able to easily deform by exposure to the normal strength of the porcelain. In other literature, however, decay is defined as occurring when exposed to abrasive particles. If, as a result of abrasive particles, the surface of the Gills was eaten, it would have to be eroded in a circle, and not Oval. This idea does not mean that absolutely abrasive particles have nothing to do with decay. But in general, we can consider them as decay and deformation under the influence of abrasive particles on the cause of the appearance of the slit.

Figure 1. The appearance of a cylinder ring slit
The wall of cylinders would have little effect on engine performance when uniformly i.e. circularly eroded. Because, the rings act as a flat spring and are made with a certain pressure epic. This ensures that the rings are touched by the chips on the circular surfaces.
In addition to the above, the origin of the slit can also be caused by deformations in the engine assembly process. In these cases, the cylinder devoir loses its absolute circular shape.



Figure 2. Cylinder-ring slit
The following requirements are imposed on the Rings:

• 
  the walls are strong enough to withstand the force of gases;
  
• 
  mirror resistant to decay;
  
• 
  has the property of antifriction and corrosion resistance;
  
• 
  must have good compaction and the ability to freely expand along the axis.
  

Basic requirements for porches:

• 
  the mass is small, robust and be bikr;
  
• 
  working life proportional to engine;
  
• 
  production (casting) should be easy.
  

Requirements for porcelain rings

• 
  failure to pass gases in the piston-top cavity to the crankcase;
  

• 
  transfer heat from the porcelain to the ring;
  
• 
  it should form an oil curtain on the walls of the ring, urinate the excess and not transfer it to the combustion chamber.
  

As a logical continuation of the gas hole proposal, a project was developed to make changes to the porcelain construction. According to the proposed introduction, an additional hole is opened at an angle of 45° from the top of the second compression ring ditch. The expected result is that through this hole, the pressure between the cylinder-piston must pass behind the ring and push it into the cylinder wall.

Figure 3. Expected result from experience
We do the experiment in the Advanced simulation section of the nx10 program. Because there is no way to measure gases passing through the slit in practice. Tests conducted in this program are in many cases proportional to practical experiments. According to the literature, the first ring is affected by 70-75% of the pressure in the combustion chamber, and the second ring is affected by 2025% pressure. Figure 3 shows that 20% of the total boosim is passing behind Ring 2. For the usual case, a test experiment was performed. The results were what we expected. That is, the amount of pressure passing behind the second ring was 20.3%.

Figure 4. Pressures falling on compression rings

Figure 5. Experiment for the usual
The second compression ring opened the initial hole with an angle of 45° in order to increase the pressure passing behind it. 2-for the experiment, the height of the hole opened was determined in the amount of 50% of the distance between the first and second rings. For the inner angle of the hole, the radius of curvature was set. It serves to direct the flow of gas.
According to the results of the test, the amount of pressure passing behind the ring was 22%.
In the third experiment, the height of the hole was taken at the rate of 80% of the distance between the Rings.

Figure 6. Experience 2 results
The opening of these holes over the second ring does not affect the constant working process of the engine. If the slit begins to appear, then it will pass behind the ring most of the passing pressures and serve to ensure density.

Figure 7. Results of the third experiment.
In case 3, the amount of pressure passing behind the ring was 24.7%. This means that most of the pressure on Ring 2 goes behind the ring.
To analyze the above results, we place in the table the amount of biosimilars in them. As can be seen from the table, in the results of experiment 3, the amount of pressure is much higher than in the rest of the experiments.
Table 1.

Test procedure	2-pressure passing behind the ring, %
Experience 1	20,3
Experience 2	22
Experience 3	24,7