WO2010025610A1 - A water-cooled engine block - Google Patents

A water-cooled engine block Download PDF

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Publication number
WO2010025610A1
WO2010025610A1 PCT/CN2009/000765 CN2009000765W WO2010025610A1 WO 2010025610 A1 WO2010025610 A1 WO 2010025610A1 CN 2009000765 W CN2009000765 W CN 2009000765W WO 2010025610 A1 WO2010025610 A1 WO 2010025610A1
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WO
WIPO (PCT)
Prior art keywords
cooling chamber
cooling
cylinder
water
cross
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PCT/CN2009/000765
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French (fr)
Chinese (zh)
Inventor
肖亨琳
Original Assignee
无锡开普机械有限公司
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Publication of WO2010025610A1 publication Critical patent/WO2010025610A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/021—Cooling cylinders

Definitions

  • the present invention relates to a water-cooled engine block, and more particularly to a cylinder block for a wet-cylinder engine.
  • the engine body of the wet cylinder liner is provided with a cooling water channel between the cylinder liner and the cylinder block, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket.
  • the wet cylinder liner is in direct contact with the coolant and has better heat dissipation conditions.
  • the temperature of each part of the cylinder liner is very inconsistent, and the fire shore of the piston is concentrated on the upper part of the cylinder liner.
  • the cooling water jacket of the existing engine body has no change in the cross-sectional area, and the coolant flow rate and the flow rate of each part in the cooling water jacket are the same, and the cooling rate of each part of the cylinder liner is the same, resulting in uneven temperature of the entire cylinder liner. . Since the temperatures of the various parts of the cylinder are inconsistent, the degree of expansion of each part is also different, so that the normal fit clearance between the parts changes, thereby affecting the normal operation of the engine.
  • the object of the present invention is to overcome the above-mentioned deficiencies and to provide a water-cooled engine body in which the flow rate and flow rate of the coolant in the cylinder casing temperature portion are increased to achieve better cooling of each portion of the cylinder block.
  • the water-cooled engine body comprises a cylinder block and a cylinder liner, and a cooling water channel is arranged between the cylinder liner and the cylinder block, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket; and the feature is - the cylinder liner
  • An upper positioning belt and a lower positioning belt are disposed on the inner surface of the cylinder; a convex ring is disposed on the inner surface of the cylinder; a cooling water channel formed between the lower positioning belt and the convex ring is a first cooling chamber;
  • the cooling water channel formed between the positioning belts is a second cooling chamber;
  • the cooling water channel formed above the upper positioning belt is a third cooling chamber;
  • the cross-sectional area of the second cooling chamber is smaller than the cross section of the first cooling chamber Area;
  • the cross-sectional area of the third cooling chamber is smaller than the cross-sectional area of the second cooling chamber.
  • the convex ring is located between the upper positioning belt and the lower positioning belt of the cylinder liner, and a circumferential gap is disposed between the cylinder sleeve and the cylinder sleeve.
  • the water inlet and the water outlet are arranged on the cylinder; the water inlet is in communication with the first cooling chamber; and the water outlet is connected to the water outlet of the second cooling chamber and the third cooling chamber.
  • a communication port communicating with the first cooling chamber is disposed on a sidewall of the cylinder.
  • the top of the cylinder is provided with a water jacket hole communicating with the second cooling chamber.
  • the inner surface of the cylinder is provided with an axial groove formed as a water inlet of the third cooling chamber, and the water inlet corresponds to the upper positioning belt.
  • the present invention utilizes the Venturi principle.
  • a pressure drop occurs due to a throat at the outlet, so that the flow rate of the coolant is increased, the flow rate is increased, and the heat dissipation rate is also increased.
  • a cooling chamber having a small cross-sectional area is disposed in a high temperature region of the cylinder liner, thereby accelerating the coolant.
  • the flow rate increases the flow rate of the coolant, increases the heat dissipation rate of the high temperature zone, makes the temperature of the entire cylinder liner uniform, ensures the normal matching clearance between the various parts of the cylinder, and ensures the normal operation of the engine; The temperature of the cylinder liner is more uniform.
  • the invention adds a convex ring on the cylinder body, because the flow velocity of the coolant in the first cooling chamber is not uniform, and the coolant flows into the second cooling chamber through the convex ring and is evenly distributed, and the convex ring and the cylinder sleeve are used.
  • the upper positioning belt and the lower positioning belt divide the cooling water jacket into three cooling chambers, and the structure is simple, and the processing and manufacturing are convenient.
  • the side wall of the cylinder body is provided with a communication port communicating with the first cooling chamber, and the cooling water jacket between the cylinders of the multi-cylinder engine can be penetrated.
  • the top of the cylinder body is provided with a water jacket hole communicating with the second cooling chamber to guide the coolant flowing from the body to the cylinder head, so that the fluidity of the water jacket of the cylinder head and the water jacket of the body is better.
  • Figure 1 is a plan view of the present invention.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 3 is a cross-sectional view taken along line B-B of Figure 1.
  • Figure 4 is a cross-sectional view taken along line C-C of Figure 1.
  • Figure 5 is a cross-sectional view taken along line D-D of Figure 1.
  • Figure 6 is a cross-sectional view taken along line E-E of Figure 2;
  • Figure 7 is a cross-sectional view taken along line F-F of Figure 2;
  • Figure 8 is a cross-sectional view taken along line G-G of Figure 2.
  • Figure 9 is a cross-sectional view taken along line H-H of Figure 2.
  • FIG. 1 it is a top view of the last cylinder in the multi-cylinder water-cooled engine block.
  • the invention comprises a cylinder block 1 and a cylinder liner 2; a cooling water channel is arranged between the cylinder liner 2 and the cylinder block 1, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket.
  • the cooling water jacket may be provided as two or more cooling chambers, and the cross-sectional areas of the two or more cooling chambers are decreased in the axial direction of the cylinder liner 2.
  • the preferred cooling chamber is set to three.
  • the cylinder sleeve 2 is provided with an upper positioning belt 11 and a lower positioning belt 15, and the inner surface of the cylinder block 1 is provided with a convex ring.
  • the convex ring 8 is located between the upper positioning belt 11 of the cylinder liner 2 and the lower positioning belt 15, and is provided with a circumferential gap 5 between the cylinder liner 2 (see Fig. 8).
  • the cooling water channel between the lower positioning belt 15 and the convex ring 8 is formed as a first cooling chamber 6, and the cooling water passage between the convex ring 8 and the upper positioning belt 11 is formed as a second cooling chamber 4, and the cooling water channel above the positioning belt 11 is formed.
  • the cross-sectional area of the second cooling chamber 4 is smaller than the cross-sectional area of the first cooling chamber 6; the cross-sectional area of the third cooling chamber 3 is smaller than the cross-sectional area of the second cooling chamber 4.
  • the area of the cross section of the first cooling chamber 6 is the largest, the area of the cross section of the second cooling chamber 4 is second, and the area of the cross section of the third cooling chamber 3 is the smallest.
  • the inner surface of the cylinder block 1 corresponding to the upper positioning belt 11 is provided with two axial grooves formed as the water inlet port 14 of the third cooling chamber.
  • the cylinder block 1 is provided with a water inlet port 7 and a water outlet port 10 (see FIG. 7), the water inlet port 7 is in communication with the first cooling chamber 6, and the water outlet port 10 and the second cooling chamber 4 are The water outlet 9 of the third cooling chamber is in communication.
  • the side wall of the cylinder block 1 is provided with a communication port 12 communicating with the first cooling chamber 6.
  • the function of the communication port 12 is to penetrate the cooling water jacket between the cylinders of the multi-cylinder engine.
  • the top of the cylinder block 1 is provided with a water jacket hole 13 communicating with the second cooling chamber 4.
  • the function of the water jacket hole 13 is to increase the coolant flowing from the body to the cylinder head, so that the fluidity of the cylinder head water jacket and the water jacket of the body is better.
  • the cross-sectional area of the cooling chamber 3 and the third cooling chamber 3 is smaller than the cross-sectional area of the second cooling chamber 4.
  • the Venturi principle is used to speed up the flow rate at the outlet.
  • the cross-sectional areas of the three cooling chambers are sequentially decreased, the cooling rate of the upper portion of the cylinder liner 2 is greater than the cooling rate of the lower portion, and the fire shore of the piston is mainly concentrated at the upper portion of the cylinder liner 2, so that the cooling rate of the upper portion of the cylinder liner 2 Faster, the overall temperature unevenness of the liner 2 is improved.
  • a water jacket hole 13 communicating with the second cooling chamber 4 is added to a cylinder closest to the cooler. Since the flow rate of the cylinder is the largest, the coolant flowing from the body to the cylinder head is more, so that the water jacket of the cylinder head and the body The circulation of the water jacket is also better.
  • the present invention enables the engine to have a better cooling effect.

Abstract

A water-cooled engine block comprises a cylinder block (1) and a cylinder liner (2) on which an upper positioning strip (11) and a lower positioning strip (15) are placed; an annular flange (8) is placed on the internal surface of the cylinder block (1); a first cooling chamber (6) is a cooling water passageway formed between the lower positioning strip (15) and the annular flange (8); a second cooling chamber (4) is a cooling water passageway formed between the annular flange (8) and the upper positioning strip (11); a third cooling chamber (3) is a cooling water passageway formed above the upper positioning strip (11); the cross-section of the second cooling chamber (4) is smaller than that of the first cooling chamber (6); the cross-section of the third cooling chamber (3) is smaller than that of the second cooling chamber(4). The water-cooled engine block can increase the flow velocity and the flow rate of the coolant and the efficiency of heat dissipation in high temperature region, which makes a uniform temperature of the whole cylinder liner and ensures normal clearance fit among any parts of the cylinder block and normal operation of the engine.

Description

水冷发动机机体  Water-cooled engine block
技术领域 Technical field
本发明涉及一种水冷发动机机体， 具体地说涉及一种湿式缸套发动机的 气缸体。  The present invention relates to a water-cooled engine block, and more particularly to a cylinder block for a wet-cylinder engine.
背景技术 Background technique
采用湿式缸套的发动机机体， 缸套与缸体之间设有冷却水道， 冷却水道 内通以冷却液从而形成冷却水套。 湿式缸套直接与冷却液接触， 散热条件较 好。 发动机工作时， 缸套各部位的温度非常不一致， 活塞的火力岸集中在缸 套的上部。 现有发动机机体的冷却水套， 其横截面的面积没有变化， 冷却水 套内各部位的冷却液流量与流速均一致， 对缸套各部位的冷却速度相同， 致 使缸套的整体温度不均匀。 由于缸体各部位.的温度不一致， 引起各部位的膨 胀程度也各不相同， 使各零件之间的正常配合间隙发生改变， 从而影响发动 机的正常工作。  The engine body of the wet cylinder liner is provided with a cooling water channel between the cylinder liner and the cylinder block, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket. The wet cylinder liner is in direct contact with the coolant and has better heat dissipation conditions. When the engine is working, the temperature of each part of the cylinder liner is very inconsistent, and the fire shore of the piston is concentrated on the upper part of the cylinder liner. The cooling water jacket of the existing engine body has no change in the cross-sectional area, and the coolant flow rate and the flow rate of each part in the cooling water jacket are the same, and the cooling rate of each part of the cylinder liner is the same, resulting in uneven temperature of the entire cylinder liner. . Since the temperatures of the various parts of the cylinder are inconsistent, the degree of expansion of each part is also different, so that the normal fit clearance between the parts changes, thereby affecting the normal operation of the engine.
发明内容 Summary of the invention
本发明的目的在于克服上述不足之处， 从而提供一种水冷发动机机体， 在该机体中通过加大缸套髙温部位冷却液的流量与流速， 使缸体各部位均得 到较好冷却。  SUMMARY OF THE INVENTION The object of the present invention is to overcome the above-mentioned deficiencies and to provide a water-cooled engine body in which the flow rate and flow rate of the coolant in the cylinder casing temperature portion are increased to achieve better cooling of each portion of the cylinder block.
按照本发明提供的技术方案， 水冷发动机机体包括缸体、 缸套， 缸套与 缸体之间设有冷却水道，冷却水道内通以冷却液从而形成冷却水套；特征是- 所述缸套上设置有上定位带及下定位带； 所述缸体内表面设置有凸环； 所述 下定位带与所述凸环之间形成的冷却水道为第一冷却室； 所述凸环与所述上 定位带之间形成的冷却水道为第二冷却室； 所述上定位带以上形成的冷却水 道为第三冷却室； 所述第二冷却室的横截面面积小于第一冷却室的横截面面 积； 第三冷却室的横截面面积小于第二冷却室的横截面面积。  According to the technical solution provided by the present invention, the water-cooled engine body comprises a cylinder block and a cylinder liner, and a cooling water channel is arranged between the cylinder liner and the cylinder block, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket; and the feature is - the cylinder liner An upper positioning belt and a lower positioning belt are disposed on the inner surface of the cylinder; a convex ring is disposed on the inner surface of the cylinder; a cooling water channel formed between the lower positioning belt and the convex ring is a first cooling chamber; The cooling water channel formed between the positioning belts is a second cooling chamber; the cooling water channel formed above the upper positioning belt is a third cooling chamber; the cross-sectional area of the second cooling chamber is smaller than the cross section of the first cooling chamber Area; the cross-sectional area of the third cooling chamber is smaller than the cross-sectional area of the second cooling chamber.
所述凸环位于所述缸套的上定位带与下定位带之间， 且与所述缸套之间 设置有环向间隙。  The convex ring is located between the upper positioning belt and the lower positioning belt of the cylinder liner, and a circumferential gap is disposed between the cylinder sleeve and the cylinder sleeve.
所述缸体上设置有进水口及出水口； 所述进水口与第一冷却室相连通； 所述出水口与第二冷却室及第三冷却室的出水口相连通。  The water inlet and the water outlet are arranged on the cylinder; the water inlet is in communication with the first cooling chamber; and the water outlet is connected to the water outlet of the second cooling chamber and the third cooling chamber.
所述缸体的侧壁上设置有与所述第一冷却室相连通的连通口。  A communication port communicating with the first cooling chamber is disposed on a sidewall of the cylinder.
所述缸体的顶部设置有与所述第二冷却室相连通的水套孔。 所述缸体内表面设置有轴向凹槽， 形成为第三冷却室的进水口， 进水口 与所述上定位带相对应。 The top of the cylinder is provided with a water jacket hole communicating with the second cooling chamber. The inner surface of the cylinder is provided with an axial groove formed as a water inlet of the third cooling chamber, and the water inlet corresponds to the upper positioning belt.
本发明利用文丘里原理， 当冷却液经过缸体出水口时， 由于出水口有一 喉口会产生压力降， 从而冷却液的流速加快， 流量增大， 散热速率也得到增 加。  The present invention utilizes the Venturi principle. When the coolant passes through the cylinder outlet, a pressure drop occurs due to a throat at the outlet, so that the flow rate of the coolant is increased, the flow rate is increased, and the heat dissipation rate is also increased.
本发明与已有技术相比具有以下优点：  The present invention has the following advantages over the prior art:
1、本发明的冷却水套分为三个冷却室后，并且三个冷却室的横截面的面 积不相同， 将横截面面积小的冷却室设置于缸套的高温区， 从而加快冷却液 的流速， 增大冷却液的流量， 增加高温区的散热速率， 使整个缸套的温度一 致， 保证缸体各零件之间的正常配合间隙， 保障发动机的正常工作； 对缸套 的冷却效果更好， 缸套的温度更均匀。  1. After the cooling water jacket of the present invention is divided into three cooling chambers, and the cross-sectional areas of the three cooling chambers are different, a cooling chamber having a small cross-sectional area is disposed in a high temperature region of the cylinder liner, thereby accelerating the coolant. The flow rate increases the flow rate of the coolant, increases the heat dissipation rate of the high temperature zone, makes the temperature of the entire cylinder liner uniform, ensures the normal matching clearance between the various parts of the cylinder, and ensures the normal operation of the engine; The temperature of the cylinder liner is more uniform.
2、 本发明在缸体上增设凸环， 由于第一冷却室中冷却液的流速不均匀， 而冷却液经凸环后流进第二冷却室就均匀了， 并利用凸环与缸套上的上定位 带及下定位带将冷却水套分为三个冷却室， 结构简单， 加工制造方便。  2. The invention adds a convex ring on the cylinder body, because the flow velocity of the coolant in the first cooling chamber is not uniform, and the coolant flows into the second cooling chamber through the convex ring and is evenly distributed, and the convex ring and the cylinder sleeve are used. The upper positioning belt and the lower positioning belt divide the cooling water jacket into three cooling chambers, and the structure is simple, and the processing and manufacturing are convenient.
3、缸体的侧壁上设置有与第一冷却室相连通的连通口，可以将多缸发动 机的各缸体之间的冷却水套贯通。  3. The side wall of the cylinder body is provided with a communication port communicating with the first cooling chamber, and the cooling water jacket between the cylinders of the multi-cylinder engine can be penetrated.
4、缸体的顶部设置有与第二冷却室相连通的水套孔，引导从机体流向缸 盖的冷却液， 使缸盖水套与机体水套的流通性更好。  4. The top of the cylinder body is provided with a water jacket hole communicating with the second cooling chamber to guide the coolant flowing from the body to the cylinder head, so that the fluidity of the water jacket of the cylinder head and the water jacket of the body is better.
附图说明 DRAWINGS
图 1为本发明的俯视图。  Figure 1 is a plan view of the present invention.
图 2为图 1中的 A-A剖视图。  Figure 2 is a cross-sectional view taken along line A-A of Figure 1.
图 3为图 1中的 B-B剖视图。  Figure 3 is a cross-sectional view taken along line B-B of Figure 1.
图 4为图 1中的 C-C剖视图。  Figure 4 is a cross-sectional view taken along line C-C of Figure 1.
图 5为图 1中的 D-D剖视图。  Figure 5 is a cross-sectional view taken along line D-D of Figure 1.
图 6为图 2中的 E-E剖视图。  Figure 6 is a cross-sectional view taken along line E-E of Figure 2;
图 7为图 2中的 F-F剖视图。  Figure 7 is a cross-sectional view taken along line F-F of Figure 2;
图 8为图: 2中的 G-G剖视图。  Figure 8 is a cross-sectional view taken along line G-G of Figure 2.
图 9为图 2中的 H-H剖视图。  Figure 9 is a cross-sectional view taken along line H-H of Figure 2;
具体实施方式 detailed description
下面本发明将结合附图中的实施例作进一步描述：  The invention will be further described below in conjunction with the embodiments of the drawings:
图 1〜图 9所示， 包括缸侔 1， 缸套 2， 第三冷却室 3， 第二冷却室 4， 环向间隙 5, 第一冷却室 6， 进水口 7， 凸环 8， 第三冷却室的出水口 9， 出 水口 10， 上定位带 11， 连通口 12， 水套孔 13， 第三冷却室的进水口 14, 下 定位带 15。 图中箭头表示冷却液的流向。 1 to 9, including cylinder bore 1, cylinder liner 2, third cooling chamber 3, second cooling chamber 4, circumferential gap 5, first cooling chamber 6, water inlet 7, convex ring 8, third Cooling chamber outlet 9, out The nozzle 10, the upper positioning belt 11, the communication port 12, the water jacket hole 13, the water inlet 14 of the third cooling chamber, and the lower positioning belt 15. The arrows in the figure indicate the flow direction of the coolant.
如图 1所示， 为多缸水冷发动机机体中的最后一缸的俯视图。 本发明包 括缸体 1、缸套 2; 所述缸套 2与缸体 1之间设有冷却水道， 冷却水道内通以 冷却液从而形成冷却水套。 所述冷却水套可设为两个或两个以上冷却室， 且 所述两个或两个以上冷却室的横截面面积沿缸套 2轴向递减。  As shown in Figure 1, it is a top view of the last cylinder in the multi-cylinder water-cooled engine block. The invention comprises a cylinder block 1 and a cylinder liner 2; a cooling water channel is arranged between the cylinder liner 2 and the cylinder block 1, and a cooling water jacket is formed in the cooling water channel to form a cooling water jacket. The cooling water jacket may be provided as two or more cooling chambers, and the cross-sectional areas of the two or more cooling chambers are decreased in the axial direction of the cylinder liner 2.
如图 2〜图 4所示， 在本实施例中， 优选的冷却室设为三个， 在缸套 2 上设置有上定位带 11及下定位带 15， 缸体 1 内表面设置有凸环 8， 凸环 8 位于缸套 2的上定位带 11与下定位带 15之间， 且与缸套 2之间设置有环向 间隙 5 (参见图 8)。下定位带 15与凸环 8之间的冷却水道形成为第一冷却室 6， 凸环 8与上定位带 11之间的冷却水道形成为第二冷却室 4， 上定位带 11 以上的冷却水道形成为第三冷却室 3。 所述第二冷却室 4的横截面面积小于 第一冷却室 6的横截面面积； 第三冷却室 3的横截面面积小于第二冷却室 4 的横截面面积。 所述第一冷却室 6的横截面的面积最大， 第二冷却室 4的横 截面的面积次之， 第三冷却室 3的横截面的面积最小。  As shown in FIG. 2 to FIG. 4, in the present embodiment, the preferred cooling chamber is set to three. The cylinder sleeve 2 is provided with an upper positioning belt 11 and a lower positioning belt 15, and the inner surface of the cylinder block 1 is provided with a convex ring. 8. The convex ring 8 is located between the upper positioning belt 11 of the cylinder liner 2 and the lower positioning belt 15, and is provided with a circumferential gap 5 between the cylinder liner 2 (see Fig. 8). The cooling water channel between the lower positioning belt 15 and the convex ring 8 is formed as a first cooling chamber 6, and the cooling water passage between the convex ring 8 and the upper positioning belt 11 is formed as a second cooling chamber 4, and the cooling water channel above the positioning belt 11 is formed. It is formed as the third cooling chamber 3. The cross-sectional area of the second cooling chamber 4 is smaller than the cross-sectional area of the first cooling chamber 6; the cross-sectional area of the third cooling chamber 3 is smaller than the cross-sectional area of the second cooling chamber 4. The area of the cross section of the first cooling chamber 6 is the largest, the area of the cross section of the second cooling chamber 4 is second, and the area of the cross section of the third cooling chamber 3 is the smallest.
如图 6所示， 与上定位带 11对应的缸体 1内表面设置有两个轴向凹槽， 形成为第三冷却室的进水口 14。  As shown in Fig. 6, the inner surface of the cylinder block 1 corresponding to the upper positioning belt 11 is provided with two axial grooves formed as the water inlet port 14 of the third cooling chamber.
如图 2、 图 9所示， 缸体 1上设置有进水口 7及出水口 10 (参见图 7)， 进水口 7与第一冷却室 6相连通，出水口 10与第二冷却室 4及第三冷却室的 出水口 9相连通。  As shown in FIG. 2 and FIG. 9, the cylinder block 1 is provided with a water inlet port 7 and a water outlet port 10 (see FIG. 7), the water inlet port 7 is in communication with the first cooling chamber 6, and the water outlet port 10 and the second cooling chamber 4 are The water outlet 9 of the third cooling chamber is in communication.
如图 3、 图 4所示， 缸体 1的侧壁上设置有与第一冷却室 6相连通的连 通口 12。 连通口 12的作用是将多缸发动机的各缸体之间的冷却水套贯通。  As shown in Figs. 3 and 4, the side wall of the cylinder block 1 is provided with a communication port 12 communicating with the first cooling chamber 6. The function of the communication port 12 is to penetrate the cooling water jacket between the cylinders of the multi-cylinder engine.
如图 1、 图 5所示， 缸体 1的顶部设置有与第二冷却室 4相连通的水套 孔 13。 水套孔 13 的作用是增加从机体流向缸盖的冷却液， 使缸盖水套与机 体水套的流通性更好。  As shown in Figs. 1 and 5, the top of the cylinder block 1 is provided with a water jacket hole 13 communicating with the second cooling chamber 4. The function of the water jacket hole 13 is to increase the coolant flowing from the body to the cylinder head, so that the fluidity of the cylinder head water jacket and the water jacket of the body is better.
本发明的工作过程如下：  The working process of the present invention is as follows:
冷却液从冷却器进入发动机缸体 1的第一冷却室 6的进水口 7后， 围绕 缸套 2—周，然后一部分冷却液通过连通口 12流向下一缸的冷却水套，另一 部分冷却液通过环向间隙 5流向第二冷却室 4， 由于第二冷却室 4的横截面 面积小于第一冷却室 6的横截面面积， 当流量相同时， 第二冷却室 4的流速 大于第一冷却室 6的流速， 从而散热速率会提高； 从第二冷却室 4流出的冷 却液一部分流向出水口 10， 另一部分通过第三冷却室的进水口 14流入第三 冷却室 3， 第三冷却室 3的横截面面积小于第二冷却室 4的横截面面积， 同 上， 由于第三冷却室 3面积很小， 阻力很大， 所以在出口处运用文丘里原理 加快流速。 由于三个冷却室的横截面面积依次减小， 所以缸套 2上部的冷却 速度要大于下部的冷却速度， 而活塞的火力岸主要集中在缸套 2的上部， 这 样缸套 2上部的冷却速度更快， 缸套 2的整体温度不均匀的现象得到改善。 After the coolant enters the water inlet 7 of the first cooling chamber 6 of the engine block 1 from the cooler, around the cylinder liner 2, a portion of the coolant flows through the communication port 12 to the cooling water jacket of the next cylinder, and another portion of the coolant Flowing through the hoop gap 5 to the second cooling chamber 4, since the cross-sectional area of the second cooling chamber 4 is smaller than the cross-sectional area of the first cooling chamber 6, when the flow rate is the same, the flow rate of the second cooling chamber 4 is greater than that of the first cooling chamber The flow rate of 6, so that the heat dissipation rate is increased; a portion of the coolant flowing out of the second cooling chamber 4 flows to the water outlet 10, and another portion flows into the third portion through the water inlet 14 of the third cooling chamber. The cross-sectional area of the cooling chamber 3 and the third cooling chamber 3 is smaller than the cross-sectional area of the second cooling chamber 4. As above, since the third cooling chamber 3 has a small area and a large resistance, the Venturi principle is used to speed up the flow rate at the outlet. . Since the cross-sectional areas of the three cooling chambers are sequentially decreased, the cooling rate of the upper portion of the cylinder liner 2 is greater than the cooling rate of the lower portion, and the fire shore of the piston is mainly concentrated at the upper portion of the cylinder liner 2, so that the cooling rate of the upper portion of the cylinder liner 2 Faster, the overall temperature unevenness of the liner 2 is improved.
本发明在离冷却器最近的一缸多加一个与第二冷却室 4 相通的水套孔 13， 由于该缸流量最大， 所以从机体流向缸盖的冷却液更多， 这样缸盖水套 与机体水套的流通性也更好。  In the present invention, a water jacket hole 13 communicating with the second cooling chamber 4 is added to a cylinder closest to the cooler. Since the flow rate of the cylinder is the largest, the coolant flowing from the body to the cylinder head is more, so that the water jacket of the cylinder head and the body The circulation of the water jacket is also better.
总体而言， 本发明能使发动机具有更好的冷却效果。  In general, the present invention enables the engine to have a better cooling effect.

Claims

权 利 要 求 Rights request
1、 一种水冷发动机机体， 包括缸体 （1 )、 缸套 （2)， 缸套 （2) 与缸体1. A water-cooled engine body comprising a cylinder (1), a cylinder liner (2), a cylinder liner (2) and a cylinder block
( 1 )之间设有冷却水道，冷却水道内通冷却液，且形成冷却水套；其特征是： 所述缸套（2)上设置有上定位带（11 )及下定位带（15); 所述缸体（1 ) 内 表面设置有凸环（8); 所述下定位带（11 )与所述凸环（8)之间形成冷却水 道为第一冷却室（6); 所述凸环（8)与所述上定位带（15)之间形成冷却水 道为第二冷却室 （4); 所述上定位带 （15) 以上形成的冷却水道为第三冷却 室 （3); 所述第二冷却室 （4) 的横截面面积小于第一冷却室 （6) 的横截面 面积； 第三冷却室 （3 ) 的横截面面积小于第二冷却室 （4) 的横截面面积。 (1) A cooling water channel is provided between the cooling water channel, and a cooling water jacket is formed in the cooling water channel; and the cooling water jacket is formed; the cylinder liner (2) is provided with an upper positioning belt (11) and a lower positioning belt (15). The inner surface of the cylinder (1) is provided with a convex ring (8); a cooling water channel is formed between the lower positioning belt (11) and the convex ring (8) as a first cooling chamber (6); a cooling water channel is formed between the convex ring (8) and the upper positioning belt (15) as a second cooling chamber (4); the cooling water channel formed above the upper positioning belt (15) is a third cooling chamber (3); The cross-sectional area of the second cooling chamber (4) is smaller than the cross-sectional area of the first cooling chamber (6); the cross-sectional area of the third cooling chamber (3) is smaller than the cross-sectional area of the second cooling chamber (4).
2、 根据权利要求 1所述的水冷发动机机体， 其特征在于所述凸环 （8) 位于所述缸套（2) 的上定位带（11 )与下定位带（15)之间， 且与所述缸套 2. The water-cooled engine block according to claim 1, wherein said convex ring (8) is located between an upper positioning belt (11) and a lower positioning belt (15) of said cylinder liner (2), and The cylinder liner
(2) 之间设有环向间隙 （5)。 (2) There is a circumferential gap (5) between them.
3、 根据权利要求 1所述的水冷发动机机体， 其特征在于所述缸体 （1 ) 上设置有进水口 （7)及出水口 （10); 所述进水口 （7) 与第一冷却室 （6) 相连通； 所述出水口 （10) 与第二冷却室 （4)及第三冷却室 （3) 的出水口 The water-cooled engine body according to claim 1, characterized in that the cylinder block (1) is provided with a water inlet (7) and a water outlet (10); the water inlet (7) and the first cooling chamber (6) communicating; the water outlet of the water outlet (10) and the second cooling chamber (4) and the third cooling chamber (3)
(9) 相连通。 (9) Connected.
4、 根据权利要求 1所述的水冷发动机机体， 其特征在于所述缸体 （1 ) 的侧壁上设置有与第一冷却室（6) 相连通的连通口 （12)。  A water-cooled engine body according to claim 1, characterized in that the side wall of the cylinder (1) is provided with a communication port (12) communicating with the first cooling chamber (6).
5、 根据权利要求 1所述的水冷发动机机体， 其特征在于所述缸体 （1 ) 的顶部设置有与第二冷却室 （4) 相连通的水套孔 （13)。  A water-cooled engine block according to claim 1, characterized in that the top of the cylinder (1) is provided with a water jacket hole (13) communicating with the second cooling chamber (4).
6、 根据权利要求 1所述的水冷发动机机体， 其特征在于所述缸体 （1 ) 内表面设置有轴向凹槽， 形成为第三冷却室的进水口 （14)， 进水口 （14)与 所述上定位带 （11 ) 相对应。  The water-cooled engine body according to claim 1, characterized in that the inner surface of the cylinder block (1) is provided with an axial groove formed as a water inlet (14) of the third cooling chamber, and the water inlet (14) Corresponding to the upper positioning belt (11).
PCT/CN2009/000765 2008-09-03 2009-07-06 A water-cooled engine block WO2010025610A1 (en)

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