CN213478503U - Cylinder block of engine, engine and vehicle - Google Patents

Abstract

The utility model relates to a cylinder block, engine and vehicle of engine, cylinder block (10) are including supplying piston reciprocating's cylinder hole (1), cylinder hole (1) is including integrated into one piece's last hole portion (11) and lower hole portion (12), the diameter of last hole portion (11) is crescent from top to bottom, and the internal perisporium of this last hole portion (11) is by contour line (111) around the central axis (100) of cylinder hole (1) are rotatory and are formed, contour line (111) structure is the curve. The cylinder body can solve the technical problem that the cylinder body is seriously knocked with the piston at the cylinder hole.

Description

Cylinder block of engine, engine and vehicle

Technical Field

The disclosure relates to the technical field of engines, in particular to a cylinder body of an engine, the engine and a vehicle.

Background

The cylinder block of the engine comprises a cylinder hole, the cylinder hole is used for enabling a piston to reciprocate, and during the reciprocating motion of the piston, the piston and a piston ring on the piston rub against the inner wall of the cylinder hole. In the related art, the cylinder bore is deformed by the influence of mechanical load, thermal load, etc. in an operating state, in which the deformation of the upper portion of the cylinder bore is large while the variation at the closest top dead center to the combustion chamber is the largest, that is, the diameter of the upper portion of the cylinder bore gradually increases from bottom to top, thereby causing the knocking of the piston at the upper half portion to become serious.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide a cylinder block of engine, this cylinder block can solve self and strike serious technical problem with the piston at the cylinder hole department.

In order to achieve the above object, the present disclosure provides a cylinder block of an engine, the cylinder block including a cylinder hole for reciprocating a piston, the cylinder hole including an upper hole portion and a lower hole portion which are integrally formed, a diameter of the upper hole portion gradually increasing from top to bottom, an inner circumferential wall of the upper hole portion being formed by a contour line rotating around a central axis of the cylinder hole, the contour line being configured as a curve.

Optionally, the contour lines are configured as inwardly concave curves.

Optionally, the contour lines are configured as outwardly convex curves.

Optionally, the contour lines are configured as curves having the same curvature or curves having varying curvatures.

Optionally, the difference between the maximum diameter and the minimum diameter of the upper aperture portion is 10-120 μm.

Alternatively, the cylinder hole has a boundary of the upper hole portion and the lower hole portion, the boundary being located on an upper side of a center line of the cylinder hole in the up-down direction.

Optionally, the diameter of the lower aperture portion is equal from top to bottom.

According to a second aspect of the present disclosure, there is provided an engine comprising a block of the engine as described above.

According to a third aspect of the present disclosure, a vehicle is provided, which includes the engine as described above.

Through the technical scheme, in the cylinder body of the engine provided by the disclosure, the upper end of the cylinder hole is close to the combustion chamber, so that the upper dead point of the cylinder hole and the deformation of the upper hole part of the cylinder hole are large, and the deformation of the cylinder hole is gradually reduced in the direction in which the cylinder hole is far away from the combustion chamber, so that the diameter of the upper hole part of the cylinder hole is gradually increased from top to bottom, and therefore, when the cylinder hole works, each position of the cylinder hole can be compensated in advance, the upper hole part can be deformed into a cylindrical shape or a nearly cylindrical shape in the work, the knocking of a piston on the upper hole part and the upper dead point of the cylinder body can be reduced, the NVH performance of the engine is optimized, and as the contour line of the upper hole part is constructed into a curve, the deformation of the upper hole part in the work can be adapted to the mechanical load and the thermal load on the upper hole part, and therefore, more accurate targeted compensation can be carried, and optimizing the NVH performance of the engine.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic partial structural view of a cylinder block provided in accordance with an embodiment of the present disclosure, illustrating an embodiment of a cylinder bore;

fig. 2 is a partial structural schematic view of a cylinder block provided according to an embodiment of the present disclosure, in which a cylinder bore of another embodiment is shown.

Description of the reference numerals

10-cylinder, 1-cylinder, 11-upper hole, 111-contour, 12-lower hole, 13-boundary, 100-central axis.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the use of directional words such as "upper and lower" is defined based on fig. 1, and specifically, reference is made to the direction of the drawing of fig. 1. "inside and outside" means inside and outside of the cylinder bore. The terms "first and second" are used herein to distinguish one element from another, and are not necessarily order nor importance. Moreover, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, and the disclosure will not be repeated here.

According to an embodiment of the present disclosure, referring to fig. 1 and 2, a cylinder block 10 of an engine includes a cylinder bore 1 for reciprocating a piston, the cylinder bore 1 includes an upper bore portion 11 and a lower bore portion 12 which are integrally formed, a diameter of the upper bore portion 11 is gradually increased from top to bottom, an inner peripheral wall of the upper bore portion 11 is formed by rotating a contour line 111 around a central axis 100 of the cylinder bore 1, and the contour line 111 is configured as a curve.

Through the technical scheme, in the cylinder block of the engine provided by the disclosure, the upper end of the cylinder hole 1 is close to a combustion chamber, so that the deformation of the top dead center of the cylinder hole 1 and the upper hole part 11 of the cylinder hole 1 is large, and the deformation of the cylinder hole 1 is gradually reduced in the direction in which the cylinder hole 1 is far away from the combustion chamber, so that the diameter of the upper hole part 11 of the cylinder hole 1 is designed to be gradually increased from top to bottom, and therefore, when the cylinder hole 1 works, each position of the cylinder hole 1 can be compensated in advance, so that the upper hole part 11 can be deformed into a cylindrical shape or a nearly cylindrical shape when working, further, the knocking of the cylinder block 10 on the upper hole part 11 and the top dead center can be reduced, the NVH performance of the engine is optimized, and because the contour line 111 of the upper hole part 11 is constructed into a curve, the deformation of the upper hole part 11, therefore, more accurate targeted compensation is carried out, namely the cylinder body 10 of the application can solve the technical problem that knocking with a piston is serious at the position of the cylinder hole 1, and the NVH performance of the engine is optimized.

In addition, the cylinder hole 1 may be subjected to uniform mechanical load and thermal load during operation, so that the uniformity of circumferential deformation of the cylinder body 10 can be ensured by the plurality of identical contour lines 111 on the inner circumferential wall, and the reciprocating motion of the piston can be better satisfied.

It should be noted that the present disclosure does not limit the specific configuration of the contour line 111, and the present disclosure will be described in detail in the following embodiments. In addition, the top dead center is well known to those skilled in the art, and the detailed description of the disclosure is omitted here.

In some embodiments of the present disclosure, referring to fig. 1, the contour 111 may be configured as a concave curve. Thus, the inner wall of the cylinder hole 1 can be gradually deformed outwards when the cylinder hole 1 works, and the inner wall of the cylinder 10 at the position of the cylinder hole 1 can be always contacted with the piston due to the inward concave contour line 111, so that the knocking of the piston and the cylinder 10 is reduced.

In other embodiments of the present disclosure, referring to fig. 2, the contour 111 may be configured as an outwardly convex curve. In this way, the inner wall of the cylinder hole 1 can be gradually deformed outwards when the cylinder hole 1 works, and because the contour line 111 protrudes outwards, the inner wall of the cylinder 10 at the position of the cylinder hole 1 can be always in contact with the piston, so that the knocking of the piston and the cylinder 10 is reduced, and meanwhile, the inner wall of the cylinder 10 at the position of the cylinder hole 1 can be kept in good contact with the piston, and the friction between the piston and the cylinder hole 1 is reduced.

In a specific embodiment of the present disclosure, the contour 111 may be configured as a curve with the same curvature or a curve with a variable curvature, where the design of the contour 111 may be designed according to the deformation caused by the mechanical load and the thermal load actually received by itself, and the details of the present disclosure are not repeated herein. The curve having the same curvature means that the curvature of the curve is the same at each position in the extending direction.

In the embodiment of the present disclosure, the difference between the maximum diameter and the minimum diameter of the upper hole part 11 is 10 to 120 μm. In this way, it is possible to appropriately compensate for a larger amount of deformation of the cylinder block 10 at the cylinder hole 1 to further reduce the knocking of the cylinder block 10 with the piston at the cylinder hole 1.

In the embodiment of the present disclosure, referring to fig. 1 and 2, the cylinder bore 1 has a boundary line 13 of the upper hole portion 11 and the lower hole portion 12, and the boundary line 13 may be located on an upper side of a center line of the cylinder bore 1 in the up-down direction. Here, since the cylinder bore 1 receives a large mechanical load and thermal load near the upper half portion and also receives a small mechanical load and thermal load at a portion above the center line, the boundary line 13 is designed to be located on the upper side of the center line, and thus, the deformation compensation can be prevented from occurring without a deformed region, and the piston can be prevented from being stuck or rattled.

In the embodiment of the present disclosure, referring to fig. 1 and 2, the diameter of the lower hole portion 12 is substantially equal from top to bottom. Here, the lower hole portion of the cylinder bore 1 receives little mechanical and thermal loads during operation, and therefore, the diameter of the lower hole portion 12 is equal from top to bottom, which can maintain good contact with the piston at various positions, reduce noise generation, and optimize the NVH performance of the engine. In addition, according to some embodiments, the diameter of the lower hole 12 may be designed to be slightly larger, so as to increase the thickness of the oil film generated between the piston and the inner wall of the lower hole 12, thereby further reducing the noise.

According to a second aspect of the present disclosure, there is provided an engine including the block of the engine as described above, and further capable of improving NVH performance of the engine itself.

According to a third aspect of the present disclosure, a vehicle is provided, which includes an engine as described above, so that the vehicle can enhance its own ride experience.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (9)

1. The cylinder block of the engine is characterized in that the cylinder block (10) comprises a cylinder hole (1) for reciprocating motion of a piston, the cylinder hole (1) comprises an upper hole part (11) and a lower hole part (12) which are integrally formed, the diameter of the upper hole part (11) is gradually increased from top to bottom, the inner peripheral wall of the upper hole part (11) is formed by rotating a contour line (111) around the central axis (100) of the cylinder hole (1), and the contour line (111) is constructed into a curve.

2. The engine block according to claim 1, characterized in that the contour line (111) is configured as an inwardly concave curve.

3. The block of an engine according to claim 1, characterized in that the contour line (111) is configured as an outwardly convex curve.

4. The block of an engine according to claim 1, characterized in that the contour lines (111) are configured as curves having the same curvature or curves of varying curvature.

5. The block of an engine according to claim 1, characterized in that the difference between the maximum diameter and the minimum diameter of the upper hole portion (11) is 10-120 μm.

6. The cylinder block of an engine according to claim 1, characterized in that the cylinder bore (1) has a boundary line (13) of the upper bore portion (11) and the lower bore portion (12), the boundary line (13) being located on an upper side of a center line of the cylinder bore (1) in the up-down direction.

7. The block of an engine according to claim 1, characterized in that the diameter of the lower bore portion (12) is equal from top to bottom.

8. An engine, characterized by comprising a block of the engine of any one of claims 1-7.

9. A vehicle characterized by comprising the engine of claim 8.

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