Diesel engine and piston

Abstract

The diesel engine comprises a piston body, the piston body is composed of a piston head, a piston top and a piston skirt, a channel assembly is arranged in the piston head and comprises a groove, the groove is formed in the piston head, the bottom of the inner wall of the groove is of a conical structure, and the middle of the groove protrudes upwards. Hemispherical holes are symmetrically formed in the center of the surface of the groove, internal threads are arranged in the groove, and a round hole is annularly formed in the top of the groove. The utility model has the beneficial effects that through the arrangement of the hemispherical hole and the round hole, the entering air can rotate to form a low-pressure area, the fuel and the air are mixed more perfectly, the pressure is reduced, the operation of the engine is smoother, the oil consumption is reduced, the carbon deposition and the accumulation of other impurities in the engine are reduced, and meanwhile, the service life of the engine is prolonged. And the perfect combustion process is also beneficial to reduction of generation of harmful emissions, and the performance and economical efficiency of the engine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a diesel engine and a piston. Background Art

[0002] The diesel engine, as an internal combustion engine, has attracted attention due to its high thermal efficiency, powerful torque output and economy. Compared with gasoline engines, diesel engines use diesel fuel with a high ignition point, which is not prone to deflagration. Instead, the fuel is ignited by compressing air to increase the temperature. This working principle makes the diesel engine more efficient in operation and reduces energy consumption and emissions to a certain extent. The piston is one of the most core components of the diesel engine, and it directly participates in the compression and power generation processes.

[0003] However, in the prior art, the existing piston does not have a special groove, channel or optimized top design, and the piston cannot promote the full mixing of fuel and air, resulting in incomplete combustion. This will reduce the output power of the engine, increase fuel consumption, and may also lead to higher harmful gas emissions, affecting environmental protection performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a diesel engine and a piston to solve the problem that the piston in the above background art cannot promote the full mixing of fuel and air, resulting in incomplete combustion, which leads to a reduction in the output power of the engine and an increase in fuel consumption, and further leads to high harmful gas emissions, affecting environmental protection performance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The technical solution of the utility model is as follows: A piston includes a piston body, which is composed of a piston head, a piston top and a piston skirt. A channel assembly is arranged inside the piston head. The channel assembly includes a groove opened inside the piston head and having a conical structure with a middle part protruding upward at the inner wall bottom. Hemispherical holes are symmetrically opened at the center of the surface of the groove. Internal threads are arranged inside the groove, and circular holes are annularly opened at the top of the groove.

[0007] As a preferred implementation, a through pin hole is opened inside the piston skirt, and weight reduction grooves are opened on both sides of the pin hole inside the piston skirt.

[0008] As a preferred implementation, a first compression ring, a second compression ring, an oil ring and an annular groove are successively opened from top to bottom on the outside of the piston top.

[0009] As a preferred implementation, a stabilizing groove is annularly opened inside the piston skirt.

[0010] As a preferred embodiment, an arc-shaped cylinder is fixedly installed at the bottom of the piston skirt.

[0011] As a preferred embodiment, gaskets are fixedly installed at both the top and bottom of the inner wall of the pin hole.

[0012] A diesel engine, which includes the above-mentioned piston.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0014] In the present utility model, the groove is the combustion chamber of the piston body. An exhaust valve, an intake valve and an injector are arranged above the piston body. When the piston body moves downward, the intake valve opens to inhale fresh air. When the piston body returns, both the intake valve and the exhaust valve are in a closed state, so that the air inside the groove is compressed. Through this compression stroke, the piston body does work on the air, and the temperature and pressure of the compressed air will reach the ignition point of diesel. At this time, the atomized diesel is injected into this air, and the diesel will be instantly ignited, causing the temperature and pressure inside the groove to rise sharply, pushing the piston body downward, converting the chemical energy contained in the diesel into the mechanical kinetic energy of the piston body. The arrangement of the hemispherical holes and round holes can make the entering air rotate to form a low-pressure area, making the fuel and air mix more perfectly, reducing the pressure, making the engine run more smoothly, reducing fuel consumption, reducing the accumulation of carbon deposits and other impurities inside the engine. At the same time, the perfect combustion process also helps to reduce the generation of harmful emissions and improve the performance and economy of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a top view structural schematic diagram provided by the present utility model;

[0016] Figure 2 is a front view structural schematic diagram provided by the present utility model;

[0017] Figure 3 is provided by the present utility model Figure 1 The enlarged view at A in.

[0018] Legend: 1. Piston body; 101. Piston head; 102. Piston top; 103. Piston skirt; 2. Channel assembly; 201. Groove; 202. Hemispherical hole; 203. Round hole; 204. Internal thread; 3. First compression ring; 4. Second compression ring; 5. Oil ring; 6. Annular groove; 7. Arc-shaped cylinder; 8. Stabilizing groove; 9. Weight-reducing groove; 10. Pin hole; 11. Gasket DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model.

[0020] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment 1

[0022] As Figures 1 - 3 shown, the present utility model provides a technical solution: a piston, including a piston body 1, the piston body 1 is composed of a piston head 101, a piston top 102 and a piston skirt 103. A channel assembly 2 is arranged inside the piston head 101. The channel assembly 2 includes a groove 201 opened inside the piston head 101 and with the bottom of the inner wall set as a conical structure protruding upward in the middle. Hemispherical holes 202 are symmetrically opened on the surface center of the groove 201. An internal thread 204 is arranged inside the groove 201. A round hole 203 is annularly opened at the top of the groove 201.

[0023] In this embodiment, the groove 201 is the combustion chamber of the piston body 1. An exhaust valve, an intake valve and an injector are arranged above the piston body 1. When the piston body 1 moves downward, the intake valve opens to inhale fresh air. When the piston body 1 returns, both the intake valve and the exhaust valve are in the closed state, so that the air inside the groove 201 is compressed. Through this compression stroke, the piston body 1 does work on the air, and the temperature and pressure of the compressed air will reach the ignition point of diesel. At this time, atomized diesel is injected into this air, and the diesel will be instantly ignited, causing the temperature and pressure inside the groove 201 to rise sharply, pushing the piston body 1 to move downward, converting the chemical energy contained in the diesel into the mechanical kinetic energy of the piston body 1. The settings of the hemispherical holes 202 and the round holes 203 can make the incoming air rotate, form a low-pressure area, make the fuel and air mix more perfectly, reduce the pressure, make the engine run more smoothly, reduce fuel consumption, reduce the accumulation of carbon deposits and other impurities inside the engine. At the same time, the perfect combustion process also helps to reduce the generation of harmful emissions and improve the performance and economy of the engine.

[0024] Embodiment 2

[0025] As Figures 1 - 3 shown, a through pin shaft through hole 10 is opened inside the piston skirt 103. Weight reduction grooves 9 are opened on both sides of the pin shaft through hole 10 inside the piston skirt 103, reducing the weight of the piston body 1, improving the overall performance of the engine, and also helping to improve the balance of the piston body 1 and reduce vibration during operation.

[0026] On the outer side of the piston top 102, a first compression ring 3, a second compression ring 4, an oil ring 5 and an annular groove 6 are successively arranged from top to bottom, which can optimize the sealing performance during the compression process, reduce the leakage of fuel, and improve the combustion efficiency. At the same time, the arrangement of the oil ring 5 and the annular groove 6 plays an important role in controlling the use of engine oil and reducing engine oil consumption;

[0027] An internal annular stabilizing groove 8 is provided in the piston skirt 103, which can enhance the guiding and stability of the piston during movement in the cylinder, thereby reducing the wear of the piston and the cylinder liner caused by the inclined load;

[0028] An arc-shaped cylinder 7 is fixedly installed at the bottom of the piston skirt 103, which increases the connection strength with the connecting rod, and at the same time helps to disperse the stress generated by the combustion force and movement, and improves the service life of the piston;

[0029] Gaskets 11 are fixedly installed at the top and bottom of the inner wall of the pin hole 10, which helps to reduce the direct contact wear between the pin and the piston and enhances the durability of the connection part.

[0030] This embodiment also provides a diesel engine, including the above-mentioned piston. The diesel engine integrating this piston design not only achieves remarkable improvements in performance and efficiency, but also has multiple advantages such as reducing fuel consumption, reducing emissions, enhancing stability and reducing maintenance costs.

[0031] Finally, it should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A piston, comprising a piston body (1), characterized in that: The piston body (1) is composed of a piston head (101), a piston top (102) and a piston skirt (103); a channel assembly (2) is arranged inside the piston head (101); the channel assembly (2) comprises a groove (201) which is opened inside the piston head (101) and the bottom of the inner wall is arranged to be a conical structure with the middle protruding upward; a hemispherical hole (202) is symmetrically opened on the surface of the groove (201); an internal thread (204) is arranged inside the groove (201); and a circular hole (203) is opened in an annular shape on the top of the groove (201).

2. A piston according to claim 1, characterized in that: A through pin through hole (10) is provided inside the piston skirt (103), and weight-reducing grooves (9) are provided inside the piston skirt (103) and on both sides of the pin through hole (10).

3. A piston according to claim 1, characterized in that: The outer side of the piston top (102) is provided with a first gas ring (3), a second gas ring (4), an oil ring (5) and an annular groove (6) in sequence from top to bottom.

4. A piston according to claim 1, characterized in that: The piston skirt (103) is provided with a stabilizing groove (8) in an annular shape inside.

5. A piston according to claim 1, characterized in that: The bottom of the piston skirt (103) is fixedly mounted by an arc-shaped cylinder (7).

6. A piston according to claim 2, characterized in that: Gaskets (11) are fixedly mounted on the top and bottom of the inner wall of the pin shaft through hole (10).

7. A diesel engine, characterized in that: A piston comprising the piston described in any one of claims 1 to 6.

Images