KR101283032B1 - Water jacket spacer - Google Patents

Abstract

The present invention provides a water jacket spacer for partitioning the inside of the water jacket of the cylinder block into three-stage channels so as to suppress excessive rise in oil temperature while minimizing piston friction loss at the top ring reverse (TRR) and low ring reverse (LRR) positions. To provide.

Cylinder Block, Water Jacket, Spacer

Description

Water Jacket Spacer {WATER JACKET SPACER}

TECHNICAL FIELD The present invention relates to a water jacket spacer, and more particularly, to a water jacket of a cylinder block so as to suppress excessive rise in oil temperature while minimizing piston friction loss at the top ring reverse (TRR) and low ring reverse (LRR) positions. The present invention relates to a water jacket spacer that divides an interior into three stage channels.

Generally, part of the heat generated in the combustion chamber of the engine is absorbed into the cylinder head, the cylinder block, the intake and exhaust valves, and the piston.

If the temperature of these components excessively increases, thermal deformation may occur or the oil film on the inner wall of the cylinder may be broken to cause a lubricating failure phenomenon, thereby causing a thermal obstacle.

The thermal failure of the engine causes abnormal combustion such as combustion failure, knocking, or preignition, thereby causing significant damage such as the loss of the piston, and the thermal efficiency is lowered and the output is also lowered. On the other hand, excessive cooling of the engine has problems such as deterioration of the output, fuel consumption and low temperature of the cylinder, and it is necessary to properly control the cooling water temperature.

In this respect, as shown in FIG. 1. The water jacket 103 of the cylinder block 101 is applied with a water jacket spacer 105 as a mechanism for inserting foreign matter into the cylinder block 101 to improve engine fuel efficiency.

The conventional water jacket spacer 105 is made of a resin material, and as shown in FIG. 2, the water jacket spacer 105 is inserted into the water jacket 103 of the cylinder block 101 to be in close contact with the bottom of the water jacket spacer 105. Set the flow path guide to control the flow of the coolant on the outside of the flow rate and the flow rate of the coolant flowing to the outside, and by adjusting the heat transfer coefficient of the engine heat transmitted from the cylinder liner 107 to maintain a constant temperature of the cylinder block 101 Will be kept.

Meanwhile, FIG. 3 illustrates another water jacket spacer 105. The water jacket spacer 105 shown in FIG. 3 has a water jacket (inside the cylinder block 101) as shown in FIG. 103 is separated into the upper channel C1 and the lower channel C2 to induce rapid cooling water flow in the upper channel C1 to provide sufficient cooling to the inter-cylinder bore and the cylinder bore top ring reverse (TRR) site. Induction, the lower channel is applied to increase the temperature of the liner 107 by substantially stagnating the coolant flow.

That is, FIG. 5 is a result of measuring the stroke metal surface temperature of the cylinder block 101 according to whether the water jacket spacer 105 is installed inside the water jacket of the cylinder block in the partial load region of the engine. As the jacket spacer 105 is mounted, the metal surface temperature of the center and the bottom of the stroke increases, and it can be seen that the uniform temperature distribution is shown.

6 is a result of evaluating the temperature and oil temperature of the cylinder block 101 according to the presence or absence of the water jacket spacer, the water jacket spacer 105 is installed in the water jacket 103 of the cylinder block 101. As the temperature of the cylinder block 101 increases, it can be seen that the oil temperature also increases.

However, in the case of the oil temperature, there is a problem that the amount of increase is excessively increased beyond the engine development limit, and thus a structure of a water jacket spacer that can reduce the oil temperature while maintaining the fuel efficiency gain is required.

That is, FIG. 7 is a graph illustrating a change in the piston friction force according to the crank angle change when the oil temperature condition is changed, and the friction loss of the piston 109 is lowered as the oil temperature increases, but the top ring reverse (TRR) Top In Ring Reverse and Low Ring Reverse (LRR) positions, friction losses increase with increasing oil temperature.

Therefore, the present invention is in view of the characteristics of the friction loss of the piston according to the oil temperature in the top ring reverse (TRR) and low ring reverse (LRR) position described above, the object of the present invention is the top ring reverse (TRR) ) And the top ring reverse (TRR) and the low ring reverse by dividing the inside of the water jacket of the cylinder block into three-stage channels to suppress excessive rise in oil temperature while minimizing piston friction loss at the low ring reverse (LRR) position. Only the upper and lower channels corresponding to the (LRR) position provide a water jacket spacer that induces rapid cooling water flow.

In the water jacket spacer for achieving the above object is installed in the water jacket of the cylinder block to partition the circulation of the cooling water,

An upper diaphragm formed in an arc shape along a flat cross-sectional shape of the water jacket for each cylinder of the cylinder block, and integrally connected to each cylinder through a node; Each cylinder of the cylinder block is formed in an arc shape along the flat cross-sectional shape of the water jacket, is integrally connected through the node portion for each cylinder, both ends are integrally connected to both ends of the upper diaphragm through a connecting membrane, respectively Diaphragm; It is characterized in that it is formed of a support plate for connecting the nodes of the upper diaphragm and the lower diaphragm up and down and at the same time to support the upper diaphragm and the lower diaphragm in the water jacket.

The interior of the water jacket is divided into an upper channel, a central channel and a lower channel by the upper diaphragm and the lower diaphragm.

The upper diaphragm and the lower diaphragm and the connecting membrane are characterized in that a plurality of air bleed holes are formed at a predetermined interval on the cross section.

The support plate is formed in a state in which the upper diaphragm and the lower diaphragm are connected to each other, and integrally form an extended support end extending upwardly and downwardly.

As described above, according to the water jacket spacer according to the present invention, the inside of the water jacket of the cylinder block is divided into three-stage channels by the upper diaphragm and the lower diaphragm so that the top cylinder reverse (TRR) position of the inter cylinder bore and the cylinder block By inducing coolant flow rates in the upper and lower channels for temperature reduction and lower channel for temperature reduction, and in the central channel, the coolant flow rates can be stagnated to increase the liner temperature to reduce piston friction losses. Fuel efficiency gains can be achieved by keeping the temperature of the cylinder block interruption high, which dominates the effective cooling of the top of the large cylinder block and piston friction.

In addition, cooling at the bottom of the cylinder block prevents excessive oil temperature rise, and the top ring reverse (TRR) and low ring reverse (LRR) of the cylinder block, which makes the piston behavior weak when the oil temperature increases. ) Cooling part effectively maintains the piston's behavior.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

8 is a perspective view of a water jacket spacer according to an embodiment of the present invention, Figure 9 is a cross-sectional view of the water jacket portion of the cylinder block to which the water jacket spacer according to an embodiment of the present invention, Figure 10 is an embodiment of the present invention Flow chart of the coolant by the water jacket spacer according to.

The water jacket spacer 1 according to the present embodiment is installed inside the water jacket 5 of the cylinder block 3 to partition the circulation of the cooling water.

As shown in FIGS. 8 and 9, the water jacket spacer 1 has an upper diaphragm 11 in an arc shape along a flat cross-sectional shape of the water jacket 5 for each cylinder of the cylinder block 3. Is formed.

The upper diaphragm 11 is integrally connected through the node portion M for each cylinder.

The lower diaphragm 13 is formed in an arc shape along the flat cross-sectional shape of the water jacket 5 for each cylinder of the cylinder block 3.

The lower diaphragm 13 is formed in the same manner as the upper diaphragm 11, and is integrally connected through the node portion M for each cylinder.

Each of the upper diaphragm 11 and the lower diaphragm 13 is formed at one end of each of the upper diaphragms 11 and the lower diaphragm 13 through the connection membrane 15.

And the upper diaphragm 11 and the lower diaphragm 13, the respective node portion (M) is connected up and down through the support plate 17.

The support plate 17 connects the upper diaphragm 11 and the lower diaphragm 13 at its node portion M to support the upper diaphragm 11 and the lower diaphragm 13 in the water jacket 5. In one state, the extended support end 19 is formed integrally extending to the upper and lower, respectively.

That is, the upper diaphragm 11 and the lower diaphragm 13 are installed inside the water jacket 5 to partition an inner space into an upper channel C1, a central channel C3, and a lower channel C2.

The upper diaphragm 11, the lower diaphragm 13, and the connecting membrane 15 are provided with a plurality of air bleed holes H at predetermined intervals on their cross-sections.

Therefore, the water jacket spacer 1 having the above-described configuration, as shown in FIG. 9, is formed on the upper diaphragm 11 and the lower diaphragm 13 in the water jacket 5 of the cylinder block 3. As a result, the inside of the water jacket 5 of the cylinder block 3 is divided into three stage channels.

That is, the three-stage channel is divided into the upper channel C1, the center channel C3, and the lower channel C3, as described above, and is located at the top ring reverse (TRR) position of the inter cylinder bore and the cylinder block. In order to reduce the temperature, the upper channel C1 quickly induces a coolant flow rate, as shown in FIG. 10.

In addition, the coolant flow rate is rapidly induced in the lower channel C2 for reducing the oil temperature.

The central channel C3 induces a flow rate such that the coolant is stagnant or very slowly flowing to sufficiently raise the temperature of the liner 9 to reduce the frictional loss of the piston 7.

Accordingly, the cooling of the lower end of the cylinder block 3 is maintained while maintaining the high temperature of the cylinder block 3 interruption, which has a dominant influence on the friction of the piston 7, together with the effective cooling of the upper end of the cylinder block 3 having a high heat load. To prevent excessive oil temperature rise.

FIG. 11 is a graph of a comparison of stroke temperatures of a cylinder block 3 to which a water jacket spacer 1 according to an embodiment of the present invention is applied, and according to the installation of the water jacket spacer 1 according to the present embodiment, a piston 7 is shown. Effective cooling over the top of the cylinder block (3) with high heat loads and the bottom of the cylinder block (3) affecting excessive oil temperature rise, while maintaining the temperature of the cylinder block (3) interruption, which has a dominant influence on friction, You can see that this is achieved.

1 is a perspective view of a cylinder block for explaining a water jacket spacer and its mounting portion according to the prior art.

Figure 2 is a cross-sectional view of the water jacket of the cylinder block in which the water jacket spacer according to the prior art is installed.

3 is a perspective view of a water jacket spacer according to another embodiment of the prior art.

4 is a cross-sectional view of a water jacket of a cylinder block in which a water jacket spacer is installed according to another embodiment of the prior art.

5 is a graph comparing bore stroke temperatures with and without water jacket spacers of the related art.

6 is a graph illustrating an evaluation of coolant temperature and oil temperature of a cylinder block according to whether a water jacket spacer according to the related art is installed.

7 is a graph illustrating a piston friction loss characteristic according to temperature.

8 is a perspective view of a water jacket spacer according to an embodiment of the present invention.

9 is a cross-sectional view of the water jacket of the cylinder block to which the water jacket spacer according to the embodiment of the present invention is applied.

10 is a flow chart of the coolant by the water jacket spacer according to the embodiment of the present invention.

11 is a graph illustrating a stroke temperature comparison of a cylinder block to which a water jacket spacer according to an embodiment of the present invention is applied.

Claims (4)

In the water jacket spacer provided in the water jacket of the cylinder block to partition the circulation of the cooling water, An upper diaphragm formed in an arc shape along a flat cross-sectional shape of the water jacket for each cylinder of the cylinder block, and integrally connected to each cylinder through a node; Each cylinder of the cylinder block is formed in an arc shape along the flat cross-sectional shape of the water jacket, is integrally connected through the node portion for each cylinder, both ends are integrally connected to both ends of the upper diaphragm through a connecting membrane, respectively Diaphragm; A support plate for connecting the nodes of the upper diaphragm and the lower diaphragm up and down and simultaneously supporting the upper diaphragm and the lower diaphragm in the water jacket; The water jacket spacer, characterized in that the upper diaphragm and the lower diaphragm and the connecting membrane is formed with a plurality of air bleed holes at regular intervals on the cross section. The method of claim 1, The inside of the water jacket And a water jacket spacer partitioned into an upper channel, a central channel, and a lower channel by the upper diaphragm and the lower diaphragm. delete The method of claim 1, The support plate is The water jacket spacer, characterized in that to integrally form an extended support end extending to the upper and lower portions, respectively, while the upper diaphragm and the lower diaphragm are connected.

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