Cylinder block structure

Abstract

The present invention discloses a cylinder block structure, comprising an integrated cylinder head and a range-extending cylinder sleeve; the integrated cylinder head comprises a cylinder barrel; a part of the range-extending cylinder sleeve is embedded in the lower end of the cylinder barrel. The present invention discloses a cylinder block structure capable of increasing the displacement of an engine by only changing a crankcase and machining without changing the structure of the integrated cylinder head.

Description

Technical Field

[0001] The invention relates to the field of engines, in particular to a cylinder body structure capable of increasing engine displacement. Background Art

[0002] General cylinder liners are divided into dry cylinder liners and wet cylinder liners, both of which are embedded in the cylinder bore. When the engine stroke or cylinder diameter changes, the cylinder liners need to be redesigned to match the engine body and cylinder head. When the displacement or stroke needs to be increased, the traditional engine needs to redesign the engine body and cylinder liners. At present, a new structure cylinder head (cylinder head with integrated cylinder liners) will perfectly solve the problem of the engine needing to redesign the cylinder liners and cylinder heads if the displacement and stroke are increased.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a cylinder block structure, which can increase the displacement of the engine by only changing the crankcase and machining without changing the structure of the integrated cylinder head.

[0005] To achieve the above objectives, the present invention provides a cylinder block structure, including an integrated cylinder head and an extended-range cylinder liner; the integrated cylinder head includes a cylinder barrel; a portion of the extended-range cylinder liner is embedded in the lower end of the cylinder barrel.

[0006] In a preferred embodiment, the cylinder barrel comprises an upper cylinder liner hole, which is arranged at the lower end of the cylinder barrel, and a part of the extended-range cylinder liner is embedded in the upper cylinder liner hole.

[0007] In a preferred embodiment, the cylinder block structure further includes a crankcase, which includes an upper mounting surface, and the upper mounting surface is mounted in cooperation with the lower mounting surface of the integrated cylinder head.

[0008] In a preferred embodiment, the crankcase further comprises a lower cylinder liner hole, which is arranged on the upper mounting surface, and another part of the range-extending cylinder liner is embedded in the lower cylinder liner hole.

[0009] In a preferred embodiment, after the range-extending cylinder liner is embedded in the upper cylinder liner hole, the range-extending cylinder liner and the cylinder barrel are honed in one piece.

[0010] Compared with the prior art, the cylinder block structure of the present invention has the following beneficial effects: the present invention adopts a method of embedding a range-extending cylinder sleeve at the lower end of the cylinder barrel of the integrated cylinder head, and the displacement of the engine can be increased by only changing the machining of the crankcase and the integrated cylinder head without changing the structure of the integrated cylinder head. The method is simple, the construction cost is low, and the transformation of serialized products can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural schematic diagram of a cylinder block structure according to an embodiment of the present invention;

[0012] Figure 2 is a schematic structural diagram of an upper cylinder sleeve hole according to an embodiment of the present invention;

[0013] Figure 3 Schematic diagram of the overall structure of a cylinder block according to an embodiment of the present invention.

[0014] Description of main reference numerals:

[0015] 1-integrated cylinder head, 11-upper cylinder liner hole, 2-extended stroke cylinder liner, 3-crankcase, 31-lower cylinder liner hole, S-original stroke, S1-increased formation. DETAILED DESCRIPTION

[0016] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0017] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0018] like Figures 1 to 3 As shown, a cylinder block structure according to a preferred embodiment of the present invention comprises an integrated cylinder head 1 and an extended-range cylinder liner 2. The integrated cylinder head 1 comprises a cylinder barrel. A portion of the extended-range cylinder liner 2 is embedded in the lower end of the cylinder barrel.

[0019] In some embodiments, the cylinder barrel includes an upper cylinder liner hole 11, which is arranged at the lower end of the cylinder barrel, and a part of the range extender cylinder liner 2 is embedded in the upper cylinder liner hole 11. After the range extender cylinder liner 2 is embedded in the upper cylinder liner hole 11, the range extender cylinder liner 2 and the cylinder barrel are integrally honed.

[0020] In some embodiments, the cylinder block structure further includes a crankcase 3, which includes an upper mounting surface, and the upper mounting surface is mounted in cooperation with the lower mounting surface of the integrated cylinder head 1. The crankcase 3 also includes a lower cylinder liner hole 31, which is arranged on the upper mounting surface, and another part of the range-extending cylinder liner 2 is embedded in the lower cylinder liner hole 31.

[0021] The basic design idea of ​​the cylinder block structure of the present invention is to firstly process an upper cylinder sleeve hole 11 at the lower end of the cylinder barrel of the integrated cylinder head 1, and embed an extended-range cylinder sleeve 2 in the upper cylinder sleeve hole 11, with the length of the extended-range cylinder sleeve 2 exposed from the lower mounting surface of the integrated cylinder head 1 being S1, while the piston stroke is increased by S1 on the basis of the original stroke S, and the displacement of the engine is changed accordingly. After the extended-range cylinder sleeve 2 is embedded in the upper cylinder sleeve hole 11, the extended-range cylinder sleeve 2 and the cylinder barrel are processed by integral honing to ensure the size and tolerance requirements. At the same time, a lower cylinder liner hole 31 is processed on the upper mounting surface of the crankcase 3 to match the position of the upper cylinder liner hole 11. The depth of the lower cylinder liner hole 31 is exactly equal to the length S1 of the extended-range cylinder liner 2 exposed from the lower mounting surface of the integrated cylinder head 1. The exposed portion of the extended-range cylinder liner 2 is installed in the lower cylinder liner hole 31 so that the upper mounting surface of the crankcase 3 and the lower mounting surface of the integrated cylinder head 1 can be installed in a matching manner. In this way, the purpose of increasing the engine displacement while reducing the inconvenient appearance structure of the integrated cylinder head 1 is achieved.

[0022] In some embodiments, the extended-range cylinder liner 2 can be designed as a series of products. According to the requirements of different models, a series of engines with different displacements can be realized by combining an integrated cylinder head 1 with different extended-range cylinder liners 2 and fine-tuning of the upper and lower cylinder liner holes 31 and the crankshaft arm. This is much simpler and less costly than directly changing the cylinder diameter or height of the integrated cylinder head 1 to increase the engine displacement.

[0023] In summary, the cylinder block structure of the present invention has the following advantages: the present invention adopts a method of embedding the range-extending cylinder sleeve at the lower end of the cylinder barrel of the integrated cylinder head, and the displacement of the engine can be increased by only changing the machining of the crankcase and the integrated cylinder head without changing the structure of the integrated cylinder head. The method is simple, the construction cost is low, and the transformation of serialized products can be realized.

[0024] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A cylinder block structure, characterized in that: include: An integrated cylinder head including a cylinder barrel; A range-extending cylinder sleeve, a portion of which is embedded in the lower end of the cylinder barrel; The cylinder barrel comprises an upper cylinder sleeve hole, which is arranged at the lower end of the cylinder barrel, and a part of the range-extending cylinder sleeve is embedded in the upper cylinder sleeve hole; A crankcase, comprising an upper mounting surface, the upper mounting surface being mounted in cooperation with the lower mounting surface of the integrated cylinder head; The crankcase further comprises a lower cylinder liner hole, which is arranged on the upper mounting surface, and another part of the range-extending cylinder liner is embedded in the lower cylinder liner hole; After the range-extending cylinder sleeve is embedded in the upper cylinder sleeve hole, the range-extending cylinder sleeve and the cylinder barrel are integrally honed; The increased stroke is equivalent to the axial length of the lower cylinder sleeve hole.

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