Engine cylinder cover and engine

Abstract

The utility model provides an engine cylinder cover which comprises a cylinder cover body, a push rod chamber, an air inlet channel, an exhaust channel, bolt holes and a cooling air channel. The cylinder cover body comprises an air inlet pipe mounting surface, an exhaust pipe mounting surface, a cylinder cover mounting surface and an engine body mounting surface; the push rod chamber comprises a left push rod chamber and a right push rod chamber which are adjacently arranged; the first bolt hole and the second bolt hole are formed in the two sides of the air inlet channel, and the third bolt hole and the fourth bolt hole are formed in the two sides of the exhaust channel. The cooling air duct is arranged in the cylinder cover body and comprises an air inlet, a first air outlet, a second air outlet, a third air outlet and a fourth air outlet, the first air outlet is arranged between the second bolt hole and the left push rod chamber, the second air outlet is arranged between the right push rod chamber and the third bolt hole, and the third air outlet is arranged between the third bolt hole and the exhaust duct. The fourth air outlet is formed between the exhaust passage and the fourth bolt hole, and the air inlet and the first air outlet are formed in the two sides of the air inlet passage respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine cylinder cover and an engine. Background Art

[0002] In the prior art, the cylinder head is an important part of the engine. On the whole engine, the cylinder head bears the bolt preload, the gas force of temperature and pressure alternation, and the thermal stress caused by the temperature difference. The thermal stress of the air-cooled cylinder head is concentrated in the triangular nose bridge area and around the exhaust port. The exhaust side is sealed, and the cooling air cannot be discharged smoothly. The high-temperature gas generated by the combustion of the piston needs to be mixed and discharged through the nose bridge area to the other side. At the same time, because the exhaust port is connected to the wall of the cylinder head bolt hole, the wall thickness is large, which is not conducive to the cooling of the cylinder head. This will also cause the exhaust side of the cylinder head to deform, the cylinder head nut to loosen, and cause problems such as punching the cylinder gasket.

[0003] Therefore, it is necessary to provide an engine cylinder head and an engine to overcome the above-mentioned defects. Utility Model Content

[0004] The utility model aims to provide an engine cylinder cover and an engine.

[0005] According to one aspect of the utility model, there is provided an engine cylinder head, comprising:

[0006] A cylinder head body, the cylinder head body comprising an intake pipe mounting surface and an exhaust pipe mounting surface arranged opposite to each other in the front and rear, and a cylinder head cover mounting surface and a body mounting surface arranged opposite to each other in the upper and lower parts;

[0007] A push rod chamber, the push rod chamber vertically penetrates the cylinder head body and includes a left push rod chamber and a right push rod chamber that are adjacently arranged;

[0008] An air intake passage extending from an air intake pipe mounting surface into the cylinder head body;

[0009] An exhaust passage extending from an exhaust pipe mounting surface into the cylinder head body;

[0010] Bolt holes, the bolt holes passing through the cylinder head body, including a first bolt hole and a second bolt hole arranged on both sides of the intake passage and a third bolt hole and a fourth bolt hole arranged on both sides of the exhaust passage;

[0011] A cooling air duct, which is arranged inside the cylinder head body, includes an air inlet, a first air outlet, a second air outlet, a third air outlet and a fourth air outlet, wherein the first air outlet is arranged between the second bolt hole and the left push rod chamber, the second air outlet is arranged between the right push rod chamber and the third bolt hole, the third air outlet is arranged between the third bolt hole and the exhaust duct, the fourth air outlet is arranged between the exhaust duct and the fourth bolt hole, and the air inlet and the first air outlet are respectively arranged on both sides of the intake duct.

[0012] Preferably, the cooling air duct also includes a first air outlet connected to the first air outlet, a second air outlet connected to the second air outlet, a third air outlet connected to the third air outlet, a fourth air outlet connected to the fourth air outlet, an air inlet connected to the air inlet, and a nose bridge area air duct located in the nose bridge area, and the air inlet duct is connected to the first air outlet, the second air outlet and the third air outlet through the nose bridge area air duct.

[0013] Preferably, a partition bar is provided between the first air outlet duct and the second air outlet duct, and the partition bar extends from the middle of the push rod chamber to the nose bridge area air duct.

[0014] Preferably, an air guide strip is provided in the first air outlet duct, and the air guide strip divides the first air outlet duct into two sub-air outlet ducts and guides the cooling air to the first air outlet.

[0015] Preferably, an air guide strip is provided in the second air outlet duct, and the air guide strip divides the second air outlet duct into two sub-air outlet ducts, one sub-air outlet duct guides the cooling air to the second air outlet, and the other sub-air outlet duct guides the cooling air to the third air outlet.

[0016] Preferably, a plurality of air guide strips are provided in the air inlet duct, and the air guide strips divide the air inlet duct into a plurality of sub-air inlets, a part of which guides the cooling air to the air duct at the bridge of the nose area, and another part of which guides the cooling air to the fourth air outlet.

[0017] Preferably, an injector mounting hole is provided on the cylinder head body, and the injector mounting hole is located on the side of the air duct in the nose bridge area that is biased towards the air inlet duct.

[0018] Preferably, a heat sink is provided on the mounting surface of the air intake pipe, the heat sink is located between the first air outlet and the air intake duct, and the heat sink is arranged horizontally at intervals.

[0019] According to another aspect of the utility model, an engine is provided, comprising the above-mentioned engine cylinder head.

[0020] Compared with the prior art, the engine cylinder head and the engine provided by the utility model have the following beneficial effects:

[0021] Due to the adoption of the above technical scheme, the utility model has the advantages of simple structure, ingenious design and low cost. The exhaust duct and the bolt holes on both sides of the exhaust duct are separately arranged, that is, by adding air ducts between the exhaust duct and the bolt holes on both sides of the exhaust duct, the contact area between the inner cavity of the cylinder head and the air is increased, and the temperature in the nose bridge area and the exhaust duct is more efficiently reduced, which greatly reduces the heat load of the cylinder head, improves the heat dissipation effect of the cylinder head, improves the overall performance of the engine, and reduces the risk of the engine punching the cylinder gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 It is a three-dimensional diagram of the engine cylinder head of the utility model;

[0024] Figure 2 A top view of the engine cylinder head of the utility model;

[0025] Figure 3 It is a front view of the engine cylinder head of the utility model, that is, a front view of the intake pipe mounting surface;

[0026] Figure 4 for Figure 3 Sectional view of the AA plane;

[0027] Figure 5 It is a schematic diagram of the cooling air flow direction of the cylinder head of the engine of the utility model;

[0028] Figure 6 It is a rear view of the engine cylinder head of the utility model, that is, a front view of the exhaust pipe mounting surface.

[0029] Among them, 1. cylinder head body; 11. intake pipe mounting surface; 12. exhaust pipe mounting surface; 13. cylinder head cover mounting surface; 14. engine body mounting surface; 15. nose bridge area; 2. push rod chamber; 21. left push rod chamber; 22. right push rod chamber; 31. intake duct; 32. exhaust duct; 41. first bolt hole; 42. second bolt hole; 43. third bolt hole; 44. fourth bolt hole; 51a. first air outlet; 52a. second air outlet; 53a. third air outlet; 54a. fourth air outlet; 55a. air inlet; 51b. first air outlet; 52b. second air outlet; 53b. third air outlet; 54b. fourth air outlet; 55b. air inlet; 56b. nose bridge area air duct; 6. injector mounting hole; 7. partition bar; 8. air guide strip; 9. heat sink. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0032] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0036] See also Figure 1 , Figure 2 and Figure 6 The present embodiment discloses an engine cylinder head, including a cylinder head body 1, a push rod chamber 2, an intake passage 31, an exhaust passage 32, bolt holes, and a cooling air passage. The cylinder head body 1 includes an intake pipe mounting surface 11 and an exhaust pipe mounting surface 12 arranged opposite to each other in the front and rear, and a cylinder head cover mounting surface 13 and a body mounting surface 14 arranged opposite to each other in the upper and lower parts. The push rod chamber 2 is arranged on the same side of the intake passage 31 and the exhaust passage 32 and passes through the cylinder head body 1 in the upper and lower parts. The push rod chamber 2 includes a left push rod chamber 21 and a right push rod chamber 22 arranged adjacent to each other. The left push rod chamber 21 is close to the intake pipe mounting surface 11, and the right push rod chamber 22 is close to the exhaust pipe mounting surface 12.

[0037] The intake passage 31 extends from the intake pipe mounting surface 11 into the cylinder head body 1, and the exhaust passage 32 extends from the exhaust pipe mounting surface 12 into the cylinder head body 1. Bolt holes penetrate the cylinder head body 1, and bolts pass through the bolt holes to fix the cylinder head body 1 to the top of the engine body. The bolt holes include a first bolt hole 41 and a second bolt hole 42 provided on both sides of the intake passage 31, and a third bolt hole 43 and a fourth bolt hole 44 provided on both sides of the exhaust passage 32.

[0038] See also Figure 3 , Figure 4 and Figure 5 The cooling air duct is arranged inside the cylinder head body 1, including an air inlet 55a, a first air outlet 51a, a second air outlet 52a, a third air outlet 53a and a fourth air outlet 54a, an air inlet 55b communicating with the air inlet 55a, a first air outlet 51b communicating with the first air outlet 51a, a second air outlet 52b communicating with the second air outlet 52a, a third air outlet 53b communicating with the third air outlet 53a, a fourth air outlet 54b communicating with the fourth air outlet 54a, and a nose bridge area air duct 56b located in the nose bridge area 15. The nose bridge area air duct 56b is located between the air inlet duct 31 and the exhaust duct 32. The air inlet duct 55b is communicated with the first air outlet duct 51b, the second air outlet duct 52b and the third air outlet duct 53b through the nose bridge area air duct 56b.

[0039] The first air outlet 51a is provided between the second bolt hole 42 and the left push rod chamber 21, and the corresponding first air outlet 51b also passes between the second bolt hole 42 and the left push rod chamber 21. The second air outlet 52a is provided between the right push rod chamber 22 and the third bolt hole 43, and the corresponding second air outlet also passes between the third bolt hole 43 and the right push rod chamber 22. The third air outlet 53a is provided between the third bolt hole 43 and the exhaust passage 32, and the corresponding third air outlet 53b also passes between the third bolt hole 43 and the exhaust passage 32. The fourth air outlet 54a is provided between the exhaust passage 32 and the fourth bolt hole 44, and the corresponding fourth air outlet 54b also passes between the fourth bolt hole 44 and the exhaust passage 32.

[0040] The air inlet 55a and the first air outlet 51a are respectively arranged on both sides of the air inlet duct 31. The above air outlet and air outlet arrangement can cool down the cylinder head in an all-round way, especially the air outlet between the exhaust duct 32 and the bolt hole makes the exhaust duct 32 and the bolt hole separately arranged, increasing the contact area between the cylinder head cavity and the air. Compared with the traditional structure in which the exhaust duct 32 is connected to the cylinder head bolt hole wall and has a thicker wall, it is more conducive to the cooling of the cylinder head and prevents the deformation of the exhaust side of the cylinder head and the loosening of the cylinder head nuts. The air inlet pipe mounting surface 11 is provided with a heat sink 9, which is located between the first air outlet 51a and the air inlet duct 31. The heat sink 9 is arranged horizontally and spaced apart to increase the heat dissipation area and achieve uniform heat dissipation.

[0041] A partition bar 7 is provided between the first air outlet 51b and the second air outlet 52b, and the partition bar 7 extends from the middle of the push rod chamber 2 to the nose bridge area air duct 56b, so as to better divide the air duct flow path at the air outlet and achieve a better air flow effect. An air guide bar 8 is provided in the first air outlet 51b, and the air guide bar 8 divides the first air outlet 51b into two sub-air outlets and guides the cooling air to the first air outlet 51a. An air guide bar 8 is provided in the second air outlet 52b, and the air guide bar 8 divides the second air outlet 52b into two sub-air outlets, one sub-air outlet guides the cooling air to the second air outlet 52a, and the other sub-air outlet guides the cooling air to the third air outlet 53a.

[0042] Three air guide strips 8 are arranged in the air inlet duct 55b, and the air guide strips 8 divide the air inlet duct 55b into four sub-air inlet ducts 55b, one part of which guides the cooling air to the air duct 56b in the bridge of the nose area, and the other part of which guides the cooling air to the fourth air outlet 54a. The cylinder head body 1 is provided with an injector mounting hole 6, and the injector mounting hole 6 is located on the side of the air duct 56b in the bridge of the nose area, which is biased towards the air inlet duct 55b. The guide strips are vertically supported between the fire surface of the cylinder head and the top surface of the cylinder head, forming an "I" shaped cross-section structure.

[0043] Since the air guide strip 8 is arranged at the turning point in the air inlet 55b, a part of the cooling air passing through the air inlet 55b is guided to the injector (not shown in the figure) installed in the injector mounting hole 6 and the bridge of the nose area 15, and then discharged from the first air outlet 51a, the second air outlet 52a and the third air outlet 53a, and the remaining cooling air is discharged from the fourth air outlet 54a. At the same time, the fourth air outlet 54a should not be set too large, and its outlet flow cross-section needs to be controlled within a certain area to form a throttling effect, forcing a part of the cooling air to turn and be discharged from other air outlets, so as to achieve the purpose of fully blowing the bridge of the nose area 15 for focused cooling.

[0044] This embodiment also discloses an engine, comprising the above-mentioned engine cylinder head.

[0045] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. An engine cylinder head, characterized in that: include: A cylinder head body, the cylinder head body comprising an intake pipe mounting surface and an exhaust pipe mounting surface arranged opposite to each other in the front and rear, and a cylinder head cover mounting surface and a body mounting surface arranged opposite to each other in the upper and lower parts; A push rod chamber, the push rod chamber vertically penetrates the cylinder head body and includes a left push rod chamber and a right push rod chamber that are adjacently arranged; An air intake passage extending from an air intake pipe mounting surface into the cylinder head body; An exhaust passage extending from an exhaust pipe mounting surface into the cylinder head body; Bolt holes, the bolt holes passing through the cylinder head body, including a first bolt hole and a second bolt hole arranged on both sides of the intake passage and a third bolt hole and a fourth bolt hole arranged on both sides of the exhaust passage; A cooling air duct, which is arranged inside the cylinder head body, includes an air inlet, a first air outlet, a second air outlet, a third air outlet and a fourth air outlet, wherein the first air outlet is arranged between the second bolt hole and the left push rod chamber, the second air outlet is arranged between the right push rod chamber and the third bolt hole, the third air outlet is arranged between the third bolt hole and the exhaust duct, the fourth air outlet is arranged between the exhaust duct and the fourth bolt hole, and the air inlet and the first air outlet are respectively arranged on both sides of the intake duct.

2. The engine cylinder head according to claim 1, characterized in that: The cooling air duct also includes a first air outlet connected to the first air outlet, a second air outlet connected to the second air outlet, a third air outlet connected to the third air outlet, a fourth air outlet connected to the fourth air outlet, an air inlet connected to the air inlet, and a nose bridge area air duct located in the nose bridge area, and the air inlet duct is connected to the first air outlet, the second air outlet and the third air outlet through the nose bridge area air duct.

3. The engine cylinder head according to claim 2, characterized in that: A partition bar is provided between the first air outlet duct and the second air outlet duct, and the partition bar extends from the middle of the push rod chamber to the nose bridge area air duct.

4. The engine cylinder head according to claim 2, characterized in that: An air guide strip is provided in the first air outlet duct, and the air guide strip divides the first air outlet duct into two sub-air outlet ducts and guides the cooling air to the first air outlet.

5. The engine cylinder head according to claim 2, characterized in that: An air guide strip is provided in the second air outlet duct, and the air guide strip divides the second air outlet duct into two sub-air outlet ducts, one sub-air outlet duct guides the cooling air to the second air outlet, and the other sub-air outlet duct guides the cooling air to the third air outlet.

6. The engine cylinder head according to claim 2, characterized in that: A plurality of air guide strips are arranged in the air inlet duct, and the air guide strips divide the air inlet duct into a plurality of sub-air inlets. A part of the sub-air inlets guide the cooling air to the air duct at the bridge of the nose area, and another part of the sub-air inlets guide the cooling air to the fourth air outlet.

7. The engine cylinder head according to claim 6, characterized in that: The cylinder head body is provided with an injector mounting hole, and the injector mounting hole is located at a side of the air duct in the nose bridge area that is biased towards the air inlet duct.

8. The engine cylinder head according to claim 7, characterized in that: A heat sink is provided on the mounting surface of the air inlet pipe. The heat sink is located between the first air outlet and the air inlet duct, and the heat sink is arranged horizontally at intervals.

9. An engine, characterized in that: The invention comprises the engine cylinder head according to any one of claims 1 to 8.

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