CN212615051U - Engine cylinder liner and engine - Google Patents

Abstract

The utility model discloses an engine cylinder liner, including suit in the cylinder body of piston, cylinder body inner wall is including two low-speed districts that are located cylinder body inner wall axial both ends respectively and being located the high-speed district between two low-speed districts, and the low-speed district is provided with a plurality of pit oil grooves of arranging in proper order along the helix, and the high-speed district is provided with hyperfine honing texture. The pit oil grooves are formed in the low-speed area, the lean oil state can be improved, boundary lubrication is changed into mixed lubrication, the high-speed area is provided with ultra-fine honing textures, the contact area is reduced, the oil film thickness is reduced, and the friction coefficient in the dynamic pressure lubrication state is reduced. The utility model discloses still disclose the engine including above-mentioned cylinder liner.

Description

Engine cylinder liner and engine

Technical Field

The utility model relates to an engine field especially relates to an engine cylinder liner. In addition, the utility model discloses still relate to an engine including above-mentioned cylinder liner.

Background

The engine is an important part of an automobile and comprises a cylinder liner and a piston arranged in the cylinder liner, wherein the piston reciprocates in a cylinder body of the cylinder liner. The surface structure of the inner wall of the cylinder body directly influences the wear resistance, lubricity and antifriction of the equipment.

With the tightening of national environmental protection policy, the emission requirement of the engine is increasingly strict, and the cylinder sleeve is one of the important parts of the engine, and the whole engine must be assisted to meet the emission requirement. And the attribute parameters of the surface structure of the inner wall of the cylinder body can cause the conditions of increased oil consumption of the engine, unstable air leakage and the like, so that the whole engine cannot reach a new emission standard.

Therefore, how to provide an engine cylinder liner with improved wear resistance, lubricity and friction reduction is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an engine cylinder liner through set up the pit oil groove in low-speed district, sets up hyperfine honing texture in the high-speed district, promotes wearability, lubricity and antifriction. Another object of the present invention is to provide an engine including the above cylinder liner.

In order to solve the technical problem, the utility model provides an engine cylinder liner, including the suit in the cylinder body of piston, cylinder body inner wall is including being located respectively two low-speed districts at cylinder body inner wall axial both ends with be located two high-speed district between the low-speed district, the low-speed district is provided with a plurality of pit oil grooves of arranging in proper order along the helix, the high-speed district is provided with hyperfine honing texture.

Preferably, the oil grooves are square pits or diamond pits.

Preferably, the square pits are arranged in multiple rows and multiple columns, the square pits in each row are arranged in the radial direction, the square pits in each column are arranged in the axial direction, each square pit in two adjacent rows and each square pit in two adjacent columns are arranged in a staggered manner, each square pit in every two adjacent rows is aligned in the axial direction, and each square pit in every two adjacent columns is aligned in the radial direction.

Preferably, the radial spacing of the square pits in the same row is 2 times the width of the square pit, and the axial spacing of the square pits in the same column is 1.5 times the width of the square pit.

Preferably, the width of the square pits is less than or equal to 1.5mm, the depth of the square pits is less than 15 μm, Rz of the ultra-fine honing texture is less than 4 μm, R3z is equal to 1.5-4 μm, Rpk is less than 0.2 μm, Rk is less than or equal to 0.8 μm, Rvk is less than or equal to 1.5 μm, and the cross-hatch angle of the ultra-fine honing texture is 40 ° ± 5 °.

Preferably, end dead points of the piston operation are arranged at two circumferential ends of the inner wall of the cylinder body, the starting point of the low-speed area is located at a position 3-5 mm above the axial direction of the end dead point, and the ending point of the low-speed area is located at a position 5-8 mm below the axial direction of the end dead point.

Preferably, the width of the square pits is less than 1.5mm, the width of the square pits ranges from 0.5mm to 1.0mm, the depth of the square pits is less than 15 μm, and the depth of the square pits ranges from 5 μm to 10 μm. Preferably, the cylinder inner wall is integrally formed by a hyperfine honing process.

Preferably, the oil groove is formed by laser engraving.

The utility model provides an engine, including engine cylinder liner and piston, the engine cylinder liner specifically is above-mentioned arbitrary one engine cylinder liner.

The utility model provides an engine cylinder liner, including suit in the cylinder body of piston, cylinder body inner wall is including two low-speed districts that are located cylinder body inner wall axial both ends respectively and being located the high-speed district between two low-speed districts, and the low-speed district is provided with a plurality of pit oil grooves of arranging in proper order along the helix, and the high-speed district is provided with hyperfine honing texture. The pit oil grooves are formed in the low-speed area, the lean oil state can be improved, boundary lubrication is changed into mixed lubrication, the high-speed area is provided with ultra-fine honing textures, the contact area is reduced, the oil film thickness is reduced, and the friction coefficient in the dynamic pressure lubrication state is reduced.

The utility model discloses still provide an engine including above-mentioned cylinder liner, because above-mentioned cylinder liner has above-mentioned technological effect, above-mentioned engine also should have same technological effect, no longer introduces in detail here.

Drawings

FIG. 1 is a schematic structural view of one embodiment of an engine cylinder liner provided by the present invention;

FIG. 2 is a schematic diagram of a pit-oil groove arrangement in a low speed region of an embodiment of an engine cylinder liner according to the present invention;

fig. 3 is a cross-sectional view of a surface structure of a low speed region in an embodiment of an engine cylinder liner provided by the present invention.

Detailed Description

The core of the utility model is to provide an engine cylinder liner, through set up the pit oil groove in low-speed district, set up hyperfine honing texture in the high-speed district, promote wearability, lubricity and antifriction. The other core of the utility model is to provide an engine including above-mentioned cylinder liner.

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of an engine cylinder liner according to the present invention; FIG. 2 is a schematic diagram of a pit-oil groove arrangement in a low speed region of an embodiment of an engine cylinder liner according to the present invention; fig. 3 is a cross-sectional view of a surface structure of a low speed region in an embodiment of an engine cylinder liner provided by the present invention.

The utility model discloses specific embodiment provides an engine cylinder liner, including cylinder body 1, be provided with the piston in the cylinder body 1, the piston is reciprocating motion in cylinder body 1. In the reciprocating motion process of the piston, the piston stops moving when moving to the determined positions at the two ends of the cylinder body 1 and then reverses to continue moving, the determined position on the inner wall of the cylinder body 1 is an end dead point, the area in a certain range, expanded to the two axial sides by the end dead point, of the end dead point is a low-speed area 2 of the inner wall of the cylinder body 1, namely the two low-speed areas are located at the two axial ends of the inner wall of the cylinder body 1, and the high-speed area 3 is located between the two low-speed areas. The low-speed zone 2 is provided with a plurality of pit oil grooves 4 which are sequentially arranged along a spiral line, and the high-speed zone 3 is provided with hyperfine honing textures.

Through set up pit oil groove 4 in low-speed district 2, can improve the lean oil state, become boundary lubrication for mixing lubrication, high-speed district 3 sets up hyperfine honing texture, reduces area of contact, reduces oil film thickness, reduces the coefficient of friction under the lubricated state of dynamic pressure.

Specifically, the oil grooves 4 may be in various forms, such as diamond-shaped pits, rectangular pits, circular pits, hexagonal pits, etc., and the size parameters may be mutually referenced, preferably square pits, which has the advantages of easy processing and convenient size control.

When the square pits are arranged along a spiral line, in order to improve the arrangement accuracy, a plurality of square pits are arranged in a plurality of rows and a plurality of columns and are simultaneously arranged along the spiral line, the square pits of each row are arranged along the radial direction, the square pits of the same row are positioned on the same horizontal circumference of the inner wall of the cylinder body 1, the square pits of each column are arranged along the axial direction, the square pits of the same column are positioned on the same vertical axis of the inner wall of the cylinder body 1, the axis is vertical to the circumference, the square pits of two adjacent rows are staggered, namely the square pits of two adjacent rows are not arranged on the same axis, the square pits of two adjacent columns are staggered, namely the square pits of two adjacent columns are not arranged on the same circumference, the square pits of every two lines are axially aligned, namely the square pits of every two lines are positioned on the same axis, and the square pits of every two, i.e. every other column of corresponding square pits is located on the same circumference. For example, the first square pits in the odd-numbered rows such as the first row, the third row, the fifth row, and the like are located on the same axis, the first square pits in the even-numbered rows such as the second row, the fourth row, the sixth row, and the like are located on the same other axis, and the like, and the subsequent square pits are also located on the same corresponding axis. Similarly, the first square pits of the odd columns such as the first column, the third column, the fifth column and the like are positioned on the same circumference, the first square pits of the even columns such as the second column, the fourth column, the sixth column and the like are positioned on the other same circumference, and the like, the subsequent square pits are positioned on the corresponding same circumference. The arrangement mode of square pit can also be adjusted according to the circumstances, all be in the utility model discloses a within the scope of protection.

The utility model discloses in the engine cylinder liner that embodiment provided, according to square pit's size determination interval, square pit's length and width are the same, and square pit's on the same row radial interval is 2 times square pit width, and square pit's on the same column axial interval is 1.5 times square pit width, and the interval here is the interval on the limit that two square pits are close to.

Specifically, the width of the square pits is less than or equal to 1.5mm, the depth of the square pits is less than 15 μm, the Rz of the hyperfine honing texture is less than 4 μm, R3z is equal to 1.5-4 μm, Rpk is less than 0.2 μm, Rk is less than or equal to 0.8 μm, Rvk is less than or equal to 1.5 μm, and the cross hatch angle of the hyperfine honing texture is 40 ° ± 5 °. The starting point of the low speed zone 2 is located 3 to 5mm axially upward from the end dead point, and the end point of the low speed zone 2 is located 5 to 8mm axially downward from the end dead point. Preferably, the square pits have a width of 0.5mm, a radial spacing of 1mm and an axial spacing of 0.75 mm. Can adjust each parameter and size according to the condition, all be in the utility model discloses a within the protection scope.

On the basis of the engine cylinder liner provided in each of the above embodiments, the entire inner wall of the cylinder block 1 is formed by the ultrafine honing process, and the oil sumps 4 are formed by laser engraving.

The specific processing flow comprises rough processing, semi-finishing processing, semi-finishing processing of inner holes, ultra-finishing processing of inner holes, laser etching of pit and oil groove cutting and polishing, wherein the semi-finishing processing and the ultra-finishing processing are carried out on the whole surface of the inner wall of the cylinder body 1 before the pit and oil groove cutting by laser etching, so that the parameter requirement of ultra-finishing honing reticulate surface is met. In the low-speed area 2, the pit oil grooves 4 are etched by laser etching, and in the high-speed area, the fine texture left by the ultra-finishing is reserved without being processed again. And finally, carrying out integral polishing on the inner wall by using a sponge sand strip to remove residual scum around the laser processing pit oil groove 4.

In addition to the above-mentioned engine cylinder liner, the present invention also provides an engine including the above-mentioned engine cylinder liner, and the structure of other parts of the engine please refer to the prior art, which is not repeated herein.

The above details are provided for the engine cylinder liner and the engine provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides an engine cylinder liner, is including suit in cylinder body (1) of piston, cylinder body (1) inner wall is including being located respectively two low-speed districts (2) at cylinder body (1) inner wall axial both ends and being located two high-speed district (3) between low-speed district (2), its characterized in that, low-speed district (2) are provided with a plurality of pit oil grooves (4) of arranging in proper order along the helix, high-speed district (3) are provided with hyperfine honing texture.

2. The engine cylinder liner as claimed in claim 1, characterized in that the crater oil groove (4) is embodied as a square crater or a diamond crater.

3. The engine cylinder liner as defined in claim 2 wherein said plurality of square dimples are arranged in a plurality of rows and columns, said square dimples of each row being disposed radially, said square dimples of each column being disposed axially, each of said square dimples of two adjacent rows being staggered with respect to each of said square dimples of two adjacent columns, each of said square dimples of alternate rows being axially aligned, and each of said square dimples of alternate columns being radially aligned.

4. The engine cylinder liner of claim 3 wherein said square dimples of a row are radially spaced 2 times said square dimple width and said square dimples of a column are axially spaced 1.5 times said square dimple width.

5. The engine cylinder liner as claimed in claim 4, wherein the width of the square pits is less than or equal to 1.5mm, the depth of the square pits is less than 15 μm, Rz of the hyperfine honing texture is less than 4 μm, R3z is equal to 1.5-4 μm, Rpk is less than 0.2 μm, Rk is less than or equal to 0.8 μm, Rvk is less than or equal to 1.5 μm, and the reticulation angle of the hyperfine honing texture is 40 ° ± 5 °.

6. The engine cylinder liner as claimed in claim 5, wherein the inner wall of the cylinder block (1) is provided at both circumferential ends with end dead points at which the piston operates, the starting point of the low speed region (2) is located 3 to 5mm axially upward of the end dead points, and the ending point of the low speed region (2) is located 5 to 8mm axially downward of the end dead points.

7. The engine cylinder liner of claim 6 wherein said square pits have a width of less than 1.5mm, said square pits have a width in the range of 0.5 to 1.0mm, said square pits have a depth of less than 15 μm, and said square pits have a depth in the range of 5 to 10 μm.

8. The engine cylinder liner as claimed in any one of claims 1 to 7, characterized in that the inner wall of the cylinder block (1) is integrally formed by an ultra-fine honing process.

9. The engine cylinder liner according to claim 8, characterized in that the crater sink (4) is formed by laser engraving.

10. An engine comprising an engine cylinder liner and a piston, wherein the engine cylinder liner is particularly an engine cylinder liner as claimed in any one of claims 1 to 9.

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