KR20200063778A - Separate Type Truss Unit and Cylinder Block Thereof - Google Patents

Abstract

According to the present invention, a separable truss unit (10) applied to a cylinder block (1) comprises: a transverse truss core (11) having a truss space in which blow-by gas flows; a longitudinal truss lattice (12) having a truss space and intersecting to form a latticed shape while having a fourth truss lattice (12-4) which is not integrated with the truss core (11) in a truss removal section (K) along with a core print protrusion (15); and a penetrated boss (14) having a third penetrated boss (14-3) formed when a penetrated hole (14A) sealed by a sealing cap (20) is casted with a mold parting line (11-1) of the truss core (11). Therefore, the separable truss unit is capable of removing some processes for the sealing cap (20) and the penetrated hole (14A) using the mold parting line (11) as well as eliminating the need to change the position of a turbo oil drain due to the core print protrusion (15). According to the separable truss unit (10) applied to a cylinder block (1), the productivity can be improved.

Description

Separate type truss unit and cylinder block thereof

The present invention relates to a truss, and more particularly, to a cylinder block to which a detachable truss unit capable of cost reduction with structural simplification is applied.

In general, a truss acting as a blow-by gas passage is applied to a cylinder block in an engine.

Here, blow-by gas is a high-temperature and high-pressure combustion gas that flows out through a gap between a piston ring and a groove according to engine combustion, unburned hydrocarbons, evaporation of engine oil, which cause environmental pollution when released into the atmosphere, It contains carbon particles and moisture, and is a harmful gas that must be removed to meet automotive exhaust regulations.

Understanding this, the truss is composed of a plurality of trusses (eg, trusses 1-6) along the left and right longitudinal directions of the cylinder block, and forms vertical/horizontal spaces communicating with each other through some parts as independent spaces. Use a truss (eg, trusses 4-6) to inhale the blow-by gas and send it to an oil separator.

Therefore, the blow-by gas recirculation system (Closed Crankcase Ventilation) can increase the removal efficiency of blow-by gas by increasing the gas collecting effect of the oil separator with a truss.

Japan Special 2005-103357 (2005.4.21)

However, since the truss structure is based on an integral truss, it has no choice but to have the following disadvantages.

In addition to the first production process, the sealing cap has a through hole that communicates with each other so that a blow-by gas flows into the truss structure by the truss grid forming the truss structure and the truss core forming the transverse structure acting as a partition wall. This is because an airtight treatment process is required. Secondly, the engine part layout is changed because it is necessary to change the position of the turbo oil drain including the pipe/oil pan/pipe around the oil pan to isolate the oil due to the turbo oil drain in the truss. Third, due to excessive cost increase, it is necessary to increase design and material costs by changing drains and adding sealing caps/pipes.

Accordingly, in view of the above, the present invention simplifies the structure by removing part of the through hole and sealing cap by the mold parting line and deleting part of the truss without changing the position of the turbo oil drain by core printing of the turbo drain part. The purpose of the invention is to provide a cylinder block with a detachable truss unit that can reduce development/investment and material costs through the production of block material without removing the sealing cap and the truss and the truss core.

Detachable truss unit of the present invention for achieving the above object is to form a truss space through which the blow-by gas flows, and is composed of a truss core placed in a transverse direction and a truss grid placed in a vertical direction intersecting to form a lattice shape. The truss grating is characterized in that one truss grating that forms a truss removal section separated from the truss core among a plurality of truss gratings is included.

In a preferred embodiment, the separated truss grid is composed of a separation truss not integrated with the truss core as the truss removal section, and a connecting truss integrated with the truss core. The separation truss has a length as short as the truss removal section. The separation truss forms a core print projection, and the core print projection has a core support function when casting the truss core and the truss grid.

In a preferred embodiment, the core print projection is projected on the outer surface of the separation truss to form a turbo oil drain oil hole.

In a preferred embodiment, the truss core is provided with a plurality of through hole bosses at positions where a plurality of truss grids forming the truss grid are connected. The truss core forms a mold parting line in which any one of the plurality of through hole bosses is a hole integral boss. The mold parting line allows the truss core to be connected during casting in a state where the left truss core section and the right truss core section are separated. The left truss core section and the right truss core section form a through hole for the mold parting line during casting. The through hole is formed in the hole-integrated boss. The through hole is hermetically sealed with a sealing cap.

In addition, the cylinder block of the present invention for achieving the above object is formed with a truss space of a blow-by gas and a mold parting line connected during casting to form a truss core placed in the horizontal direction, while the truss space is formed, the truss core and A truss grid forming a lattice shape with a first truss grid integrated with the truss core together with a fourth truss grid that is not integrated, and provided at the crossing point to communicate with the truss space to mold the mold A separate truss unit consisting of a through-working boss having a through-working boss through which the through-hole is processed together with a third through-processing boss formed when casting a through-hole in the line; It characterized in that it comprises an oil separator for taking out the blow-by gas from the truss grid.

In a preferred embodiment, the fourth truss grid and the truss core form a truss removal section at the connection site. The fourth truss grid is composed of a separation truss that is not integrated with the truss core and a connection truss that is integrated with the truss core as the truss removal section. The separating truss is provided with a core print protrusion having a turbo oil drain oil hole, and a turbo oil drain pipe is connected to the turbo oil drain oil hole.

As a preferred embodiment, each of the first, 2, 4, 5, and 6 through-processing bosses is hermetically sealed with a sealing cap after the through-hole is processed.

In a preferred embodiment, the oil separator is equipped with an oil separator pipe, and the oil separator pipe is connected to a connector fitted in a connector hole formed in a fifth truss grid of the truss grid to extract the blow-by gas.

The detachable truss unit applied to the cylinder block of the present invention realizes the following actions and effects by being applicable without changing the position of the turbo oil drain along with some unapplied through holes and sealing caps.

First, the reduction of development/investment cost is due to the reduction of the production investment cost, which is additionally caused by through-hole processing with the mold parting line, and at least five pipe mold costs due to the change of the oil drain position. Second, due to material cost reduction, this is due to the reduction of the plug and reduction of the turbo pipe length compared to the oil pan processing. Third, the increase in blow-by gas extraction efficiency is due to the increase in blow-over/blow-by efficiency by blocking the turbo drain and the truss passage. Fourth, the productivity improvement is due to the fact that the core material is produced during core casting by adding the core print of the turbo drain portion, the hole for sand injection during core production, and the separation pin during core removal. Fifth, the improvement of productability is due to the improvement of field reliability and company image due to the lack of quality problems.

1 is a block diagram of a separate truss unit applied to a cylinder block according to the present invention, FIG. 2 is a mold parting line/core print structure diagram of a separate truss unit according to the present invention, and FIG. 3 is a separate truss unit according to the present invention Through-hole/core print hole/connector hole is processed, and FIG. 4 shows a state where the connector hole is positioned inside the cylinder block while the through-hole is hermetically sealed with a sealing cap in the cylinder block to which the detachable truss unit according to the present invention is applied. 5 is a state in which a turbo oil drain pipe is connected to a core print hole in a cylinder block to which a detachable truss unit according to the present invention is applied.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings, and as such examples, those skilled in the art to which the present invention pertains may be embodied in various different forms, and thus are described herein. It is not limited to the embodiment.

Referring to FIG. 1, the cylinder block 1 includes a crankshaft 3, an oil pan device 5 and a detachable truss unit 10.

Specifically, the crankshaft 3 operates in a conventional manner in which a piston (or cylinder) combustion of the cylinder block 1 is pulled out of the engine. The oil pan device 5 discharges oil reducing friction by lubricating a friction mechanism including a piston according to an engine operation so that it is scattered inside the cylinder block. Therefore, the crankshaft 3 and the oil pan device 5 together with the cylinder block 1 are common engine components.

Specifically, the separable truss unit 10 is composed of a truss core 11, a truss grating 12, and a through-hole boss 14. In particular, the truss core 11, the truss grid 12, and the through hole boss 14 are made of castings using casting by casting.

For example, the truss core 11 and the truss grating 12 make the separable truss unit 10 into a grating plate shape, and in particular, the truss core 11 and the truss grating 12 are hollow. While reducing the weight, the engine oil is discharged together with the blow-by gas into the hollow truss space to form a passage to be taken out to the oil separator 40 (see FIG. 4).

To this end, the truss core 11 is horizontal, and the truss grid 12 is a second, 3, 4, 5 truss grid 12- which is vertically positioned at regular intervals in a length section of the truss core 11 2,12-3,12-4,12-5) and the first truss grid 12-1 positioned vertically on the left end of the truss core 11 and the right end of the truss core 11 It consists of a sixth truss grid (12-6) located in.

In particular, the first truss grating 12-1 is integrated with the truss core 11 without longitudinal crossing to the truss core 11, and the second,3,5,6 truss grating 12-2,12-3 ,12-5,12-6) are integrated with the truss core 11 at the longitudinal intersection to the truss core 11. The fourth truss grid 12-4 is divided into a separation truss 12-4A and a connecting truss 12-4B, and the separation truss 12-4A is a truss removal section K to shorten its length. Thus, the truss core 11 is not connected to the truss core 11, while the truss core 12-4B is connected to the truss core 11 and is integrated with the truss core 11. Therefore, the fourth truss grating 12-4 is specified as a separate truss grating.

As an example, the through hole boss 14 is composed of a total of six first to six through bosses 14-1,14-2,14-3,14-4,14-5,14-6. The first through-processing boss 14-1 is formed on the truss core 11 to which the first truss grid 12-1 is connected, and the second,3,5,6 through-processing bosses 14-2,14 Each of -3,14-5,14-6) is connected to the truss core 11 where the 2,3,5,6 truss grids 12-2,12-3,12-5,12-6 intersect. It is formed, the fourth through-working boss 14-4 is formed on the truss core 11 to which the connecting truss 12-4B of the fourth truss grid 12-4 is connected.

In particular, 1, 2, 4, 5, 6 through-processing bosses 14 of the first to 6 through-processing bosses 14-1, 14-2, 14-3, 14-4, 14-5, 14-6 Each of -1,14-2,14-4,14-5,14-6) has a through hole 14A (see FIG. 3) blocked by a sealing cap 20 through a separate processing process after casting is produced. By being formed, the truss space of the truss core 11 and the truss grid 12 communicate. On the other hand, the third through-processing boss 14-3 of the first through six through-processing bosses 14-1, 14-2, 14-3, 14-4, 14-5, 14-6 is without a separate processing process. It is characterized by a hole-integrated boss by forming through-holes 14A (see FIG. 3) together during casting.

Meanwhile, FIG. 2 illustrates structural features of the detachable truss unit 10.

As shown, the first structural feature of the truss parting line connection structure applied to the mold casting of the detachable truss unit 10 and the second structural feature of the truss grid core print protrusion structure are illustrated. In this case, the parting line means a shape of a stem (line) left in a casting (that is, a molded product) as a joint part of a mold when forming a part. The core print means a part that is hardened by filling both ends of the core with sand for fixing the core during casting.

Specifically, the truss parting line connection structure is among the first to six through-processing bosses 14-1, 14-2, 14-3, 14-4, 14-5, 14-6 formed in the truss core 11 By forming the mold parting line 11-1 at any one position, the truss core 11 is divided into two parts, a left truss core section and a right truss core section connected to the mold parting line 11-1, and is cast. .

For example, the truss parting line connection structure is a part where the third through-processing boss 14-3 (that is, a hole-integrated boss) is positioned while the third truss grid 12-3 is crossed in the truss core 11. It is implemented as a line section, and a mold parting line 11-1 is set in the parting line section. That is, the left part of the third through-processing boss 14-3 (that is, the hole-integrated boss) is a left truss core section, and the third through-processing boss 14-3 (that is, the hole-integrated boss) is The right part is divided into the right truss core section. Then, the mold for the truss core 11 can be formed in advance before casting the shape of the through hole 14A in a state where the two parts are separated by a mold parting line 11-1.

Therefore, unlike the existing truss core 11, the truss parting line connection structure can reduce the machining process of the through hole 14A and the assembly process of the sealing cap 20 once.

Specifically, the truss grid core print protrusion structure is among the first to six truss grids (12-1,12-2,12-3,12-4,12-5,12-6) constituting the truss grid 12 By forming the core print protrusions 15 on either one, the truss grid 12 is cast separately from the truss core 11 together with length reduction by the truss removal section K.

As an example, the truss grid core print protrusion structure is a separation truss (12-4A) of a fourth truss grid (12-4) (i.e., a separate truss grid) and a separation truss (12-4A) of a connecting truss (12-4B) Is a core print position, and is implemented by forming a core print protrusion 15 at the core print position. Then, the core print projection 15 functions to support the core during casting, the hole for sand injection during core production, and the separation pin for detaching the core.

Therefore, the core print protrusion 15 is formed on the separation truss 12-4A with the truss grid core print protrusion structure, thereby compensating for core damage during casting and without changing the turbo oil drain position in the truss removal section K. 4 A part of the truss grid 12-4 (ie, a separate truss grid) can be deleted. From this, it may be possible to produce a block material for the detachable truss unit 10.

Referring to FIG. 3, a through hole 14A, a connector hole 12-5A, and a turbo oil drain oil hole 15A are illustrated.

Referring to section AA of FIG. 3, the through hole 14A is formed directly on the third through boss 14-3 (that is, the hole-integrated boss) with the truss parting line connection structure to seal the sealing cap 20. It can be seen that it is directly assembled to the cast truss core 11. Therefore, the truss parting line connection structure is processed and sealed to process the through hole 14A in the third through hole boss 14-3 (that is, a hole-integrated boss), which is required after casting the truss core 11. The assembly work for fitting the cap 20 can be deleted.

Referring to section BB of FIG. 3, the connector hole 12-5A in the fifth truss grid 12-6 is connected to the oil separator pipe 41 of the oil separator 40 with a connector 30 (see FIG. 4). ) Is exemplified.

Referring to section C-C of FIG. 3, it can be seen that the turbo oil drain oil hole 15A is processed so as not to change the position of the turbo oil drain using the print projection 15.

Meanwhile, FIGS. 4 and 5 illustrate a state in which blow-by gas and engine oil are taken out by using the detachable truss unit 10 in the cylinder block 1.

4, the cylinder block 1 with the crankshaft 3 and the oil pan device 5 comprises an oil separator 40 associated with a separable truss unit 10.

Specifically, the 1,2,4,5,6 through-processing bosses 14-1, 14-2, excluding the third through-processing bosses 14-3 of the truss core 11 of the detachable truss unit 10, 14-4,14-5,14-6) and includes five sealing caps 20 that are inserted into the through-holes 14A formed to form airtightness. This is because the sealing cap 20 is assembled to the through-hole 14A, which is formed in advance during casting, in the third through-processing boss 14-3 as in the cross-section D-D. In this case, the machining of the through-hole 14A is performed on the outer surface of the cylinder block 1 by first, second, fourth, five, and six through-processing bosses 14-1, 14-2, 14-4, 14-5, 14-6).

Specifically, in the oil separator 40, the oil separator pipe 41 is coupled to the connector hole 12-5A of the fifth truss grid 12-6 using the connector 30. Particularly, the connector 30 increases the blow-by gas extraction efficiency by partially inserting it deeply into the connector hole 12-5A and protruding into the block.

5, the cylinder block 1 includes a turbo oil drain pipe 50 associated with a separable truss unit 10.

Specifically, the separable truss unit 10 is a turbo oil drain oil hole 15A formed in the print projection 15 of the separating truss 12-4A constituting the fourth truss grating 12-4 (that is, separating truss grating) ), the turbo oil drain pipe 50 is connected.

Therefore, the cylinder block (1) does not change the position of the existing turbo oil drain, so as to keep oil intact due to the turbo oil drain in the truss of the separating truss unit (10), the pipe change/oil pan when changing the position of the turbo oil drain No modifications and no need for pipe layout around the oil pan.

Furthermore, the cylinder block 1 improves block rigidity by filling the truss removal section (K) by the cylinder block (10) by using the truss removal section (K) of the separation truss (12-4A) (i.e., a separate truss grid) Can be.

As described above, the detachable truss unit 10 applied to the cylinder block 1 according to the present embodiment has a truss core 11 in a transverse direction having a truss space through which a blow-by gas flows, and a truss space to form a lattice shape. The truss grid 12 in the longitudinal direction, the truss core 11 having a fourth truss grid 12-4 which is not integrated with the truss core 11 as a truss removal section K along with the core print projection 15 while being crossed ) Using a mold parting line 11-1 of the through-processing boss 14 having a third through-processing boss 14-3 that is formed when casting the through-hole 14A, which is hermetically treated with the sealing cap 20, By being composed of ), some processes are deleted during the processing of the through hole 14A and the sealing cap 20 using the mold parting line 11, and the turbo oil drain position change is not required by the core print protrusion 15.

1: Cylinder block 3: Crankshaft
5: oil pan device 10: detachable truss unit
11: truss core 11-1: mold parting line
12: truss grid
12-1,12-2,12-3,12-4,12-5,12-6: 1st to 6th truss grid
12-4A: Split truss 12-4B: Connecting truss
12-5A: Connector hole 14: Through hole boss
14-1,14-2,14-3,14-4,14-5,14-6: 1st to 6th through bosses
14A: Through hole 15: Core print projection
15A: Turbo oil drain oil hole
20: sealing cap 30: connector
40: oil separator 41: oil separator pipe
50: turbo oil drain pipe

Claims (18)

It forms a truss space through which the blow-by gas flows, and consists of a truss core lying in a crosswise direction and a truss grid lying in a vertical direction to form a lattice shape,
The truss grating includes one separated truss grating forming a truss removal section separated from the truss core among a plurality of truss gratings
Detachable truss unit, characterized in that
The separated truss unit of claim 1, wherein the separated truss grid comprises a separated truss not integrated with the truss core as the truss removal section, and a connecting truss integrated with the truss core.
The method according to claim 2, The separation truss is separated truss unit, characterized in that consisting of a length as short as the truss removal section.
The separation truss unit of claim 2, wherein the separation truss forms a core print projection, and the core print projection has a core support function when casting the truss core and the truss grid.
The detachable truss unit of claim 4, wherein the core print projection protrudes from an outer surface of the separation truss.
5. The detachable truss unit according to claim 4, wherein a turbo oil drain oil hole is formed in the core print projection.
The method according to claim 1, The truss core 11 is a separate truss unit characterized in that it comprises a plurality of through-hole hole boss (14) at each position where a plurality of truss grids forming the truss grid (12) are connected.
The separated truss unit of claim 7, wherein the truss core forms a mold parting line in which any one of the plurality of through hole bosses is a hole integral boss.
The separated truss unit according to claim 8, wherein the mold parting line is connected to the truss core during casting in a state in which the left truss core section and the right truss core section are separated.
The separation truss unit of claim 9, wherein the left truss core section and the right truss core section form a through hole for the mold parting line during casting.
The separation truss unit according to claim 10, wherein the through hole is formed in the hole-integrated boss.
The detachable truss unit according to claim 10, wherein the through hole is hermetically sealed with a sealing cap.
A truss core placed horizontally by forming a mold parting line connected during casting together with the truss space of the blow-by gas, and the truss core integrated with the truss core not being integrated with the truss core while the truss space is formed A truss grid forming a grid shape with a first, second, third, fifth, and truss grid, and a third through-processing boss formed by casting the through-hole in the mold parting line so as to communicate with the truss space at the intersection point Detachable truss unit consisting of a through-processing boss having a through-processing boss, in which the through-holes are processed together;
An oil separator that blows out blow-by gas from the truss grid;
Cylinder block characterized in that it is included.
The cylinder block according to claim 13, wherein the fourth truss grid and the truss core form a truss removal section at a connection portion.
The cylinder block according to claim 14, wherein the fourth truss grid comprises a separation truss not integrated with the truss core as the truss removal section, and a connecting truss integrated with the truss core.
The cylinder block according to claim 15, wherein the separation truss is provided with a core print projection forming a turbo oil drain oil hole, and a turbo oil drain pipe is connected to the turbo oil drain oil hole.
The cylinder block according to claim 13, wherein each of the first, 2, 4, 5 and 6 through-processing bosses is hermetically treated with a sealing cap after the through-hole is processed.
The method according to claim 13, wherein the oil separator is equipped with an oil separator pipe, the oil separator pipe is connected to a connector fitted in a connector hole formed in the fifth truss grid of the truss grid, characterized in that to take out the blow-by gas Cylinder block.

Images