KR200235759Y1 - Piston seat device of engine cylinder - Google Patents

Abstract

The present invention relates to a piston seat device of an engine cylinder to prevent the wear of the cylinder block or the upper end of the cylinder liner in contact with the reciprocating movement by the deposit generated after combustion in the combustion chamber and to cool the high temperature, In an engine having a combustion head consisting of a cylinder head 1 and a gasket 20, a cylinder block 3, and a piston 5, the airtightness between the cylinder surface and the piston 5 in contact with the piston 5 is maintained. A piston seat 6 to be included in the upper side of the cylinder surface, and an annular cooling conduit 7 for circulating the coolant therein for cooling the piston seat 6 is formed so that the coolant in the engine operation is annular. Supply to the cooling tube (7) to prevent wear of the piston and cylinder block by foreign matters generated by combustion in the engine combustion chamber to improve its durability It can, and will be capable of preventing knocking combustion and abnormal combustion.

Description

PISTON SEAT OF ENGINE CYLINDER

The present invention relates to a piston seat (seat) device of the engine cylinder, in particular, to prevent the wear of the cylinder block or the upper end of the cylinder liner reciprocating movement by contact with the piston and deposits generated after combustion in the combustion chamber and cooling the high temperature To a piston seat device of an engine cylinder.

In general, the engine of an automobile is divided into a cylinder block which forms a cylinder in which the piston reciprocates, and a cylinder head which is installed at the upper end of the cylinder block to form a combustion chamber together with the piston and the cylinder block. An airtight gasket is inserted and fixed therein, and a combustion chamber of the cylinder head is provided with a spark plug, an intake valve, and an exhaust valve for igniting the mixer.

The cylinder block is provided with a flow path, that is, a water jacket, in which the cooling water of the cooling device circulates to prevent overheating by the frictional heat generated as the piston reciprocates the cylinder and the hot exhaust gas generated when the fuel is burned. The water jacket is formed outside the cylinder in which the piston reciprocates.

Moreover, the engine oil flow path for suppressing the friction loss of each perturbation surface of the engine including the cylinder head, the cylinder block, and the piston mentioned above is formed.

On the other hand, when the piston reciprocates up and down within the cylinder block, foreign matters generated after combustion are generated on the upper side of the bore of the cylinder block, and the foreign matter flows between the piston and the cylinder block (cylinder liner) so that the piston and the cylinder There was a problem that caused the wear of the block.

The present invention is devised to solve the problems as described above, an object of the present invention is to prevent the piston and cylinder block from being worn by the foreign matter generated by the combustion in the engine combustion chamber to improve its durability A piston seat device for an engine cylinder is provided.

The piston seat device of the engine cylinder according to the present invention is an engine having a combustion chamber consisting of a cylinder head, a gasket, a cylinder block, and a piston, and is formed by foreign matter deposited after combustion on an upper surface of a cylinder of a cylinder block forming a combustion chamber. It is characterized by comprising a piston seat installed to prevent wear.

In addition, the piston sheet is characterized by being formed of a titanium alloy.

In addition, it characterized in that it comprises an annular cooling tube installed to circulate the cooling water therein to cool the piston seat.

In addition, it is characterized in that it comprises a plunger portion which is selectively opened and closed in response to the pressure of the engine oil and is installed to supply the cooling water to the annular cooling pipe of the piston seat.

In addition, the plunger portion has an oil inflow passage of the engine oil on the upper surface, a plunger body having a first cooling water passage through which the coolant of the cylinder water jacket flows, and a second cooling water passage connected to the annular cooling pipe on the opposite side. And, a sealing ring for hermetic sealing is inserted around the upper side and provided with a plunger passage in a lateral direction, and a spring is connected between the bottom face and the bottom face of the plunger body, And a plunger for opening the first cooling water passage, the plunger passage and the second cooling water passage.

In addition, an oil temperature sensor for detecting the temperature of the engine oil, a control unit for outputting a drive signal when the detected temperature from the oil temperature sensor is above a predetermined temperature, and a solenoid valve for opening the oil inflow passage based on the drive signal from the control unit. It characterized in that it further comprises.

1 is a cross-sectional view of a piston seat device of an engine cylinder according to the present invention.

FIG. 2 is a detailed sectional view of the plunger portion of FIG. 1. FIG.

FIG. 3 shows an apparatus for driving the solenoid valve of FIG. 1. FIG.

<Description of the symbols for the main parts of the drawings>

1: cylinder head 2: gasket

3: cylinder block 4: water jacket

5: piston 6: piston seat

7: annular cooling tube 8: solenoid valve

9: oil inflow passage 10: plunger portion

12,13,14: 1,2,3 coolant passage 16: plunger passage

17: sealing ring 18: spring

19: on-il temperature sensor 20: control unit

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 is a cross-sectional view of a piston seat device of an engine cylinder according to the present invention, and includes a cylinder head 1, a gasket 2, a cylinder block 3, a water jacket 4, a piston 5, and a piston 5. Titanium alloy piston provided on the upper side of the cylinder surface while forming an annular cooling tube (7) to maintain the airtight between the cylinder surface of the cylinder block (3) and the piston (5) in contact with From the seat 6, the solenoid valve 8 which opens and closes based on the control part mentioned later, and selectively sends engine oil to the oil inflow passage 9, and from the oil inflow passage 9 connected to the solenoid valve 8; A plunger portion which is selectively opened and closed in response to the engine oil pressure to supply the cooling water from the water jacket 4 to the annular cooling pipe 7 of the piston seat 6 through the first and second cooling water passages 12 and 13 ( 10) and cooling coolant supplied to the annular cooling tube (7). And it is configured to include a third cooling water passage (14) for discharging the other water jacket (4) in a position lower than the supply water jacket (4).

The piston seat 6 prevents foreign substances generated during the explosion of the combustion chamber from flowing in between the piston and the cylinder surface located at the top dead center.

FIG. 2 is a detailed cross-sectional view of the plunger portion 10 of FIG. 1, in which an oil inflow passage 9 of the engine oil is formed on the upper surface and a first cooling water passage 12 through which the coolant of the cylinder water jacket flows. And a plunger housing 14 having a second coolant passage 13 connected to an annular cooling tube 7 not shown on the opposite side thereof, and a sealing ring 17 for hermetic sealing around its upper side. And having a plunger passage 16 in the transverse direction, the spring 18 is connected between the bottom face and the bottom face of the plunger housing 14 so that the first cooling water passage 12 and The plunger 11 which opens the plunger passage 16 and the 2nd cooling water passage 13 is comprised.

FIG. 3 is a diagram illustrating an apparatus for driving the solenoid valve of FIG. 1, wherein an oil temperature sensor 19 that senses a temperature of an engine oil and a drive signal when a detected temperature from the oil temperature sensor 19 are greater than or equal to a predetermined temperature are shown in FIG. And a solenoid valve 8 as described above, which opens the oil inflow passage 9 and the engine oil based on the drive signal from the controller 20.

Next, the operation process of the piston seat device of the engine cylinder according to the present invention having the above-described configuration will be described in detail.

First, since the entire engine is cold at the initial start of the engine, the temperature sensed by the oil temperature sensor 19 becomes below the reference temperature, so that the drive signal is not applied to the solenoid valve 8 by the controller 20. Therefore, the oil hydraulic passage 9 is blocked so that the plunger 11 of the plunger portion 10 does not move downward, so that the first cooling water passage 12, the plunger passage 16, and the second cooling water passage 13 do not open. Will not.

Therefore, the cooling water of the water jacket 4 is not supplied to the annular cooling tube 7 of the piston seat 6.

On the other hand, when the engine is running, the temperature sensed by the oil temperature sensor 19 becomes equal to or higher than the reference temperature. Therefore, since the driving signal is applied to the solenoid valve 8 from the controller 20, the oil hydraulic passage 9 is opened. The plunger 11 of the plunger portion 10 moves downward to open the first cooling water passage 12, the plunger passage 16, and the second cooling water passage 13.

Thus, the coolant of the water jacket 4 is supplied to the annular cooling conduit 7 of the piston seat 6 to cool the piston seat 6, while the piston seat 6 is between the piston 5 and the cylinder surface. It keeps the airtight and blocks foreign materials to prevent wear of piston and cylinder block.

From the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, it is possible to prevent the piston and the cylinder block from being worn by foreign matters generated by combustion in the engine combustion chamber, thereby improving durability and preventing knocking and abnormal combustion during combustion. There is.

Claims (6)

In an engine having a combustion chamber consisting of a cylinder head (1), a gasket (20), a cylinder block (3), and a piston (5), foreign matter deposited after combustion on a cylinder upper surface of a cylinder block forming a combustion chamber Piston of the engine cylinder, characterized in that the piston seat 6 is provided on the upper cylinder surface of the cylinder block to maintain the airtight between the cylinder surface and the piston 5 in contact with the piston 5 while preventing wear Sheet device. 2. The piston seat device of an engine cylinder according to claim 1, wherein the piston seat (6) is made of a titanium alloy. 2. The piston seat device according to claim 1, characterized by forming an annular cooling conduit (7) for circulating cooling water therein for cooling said piston seat (6). 4. The engine cylinder according to claim 3, further comprising a plunger portion (10) for selectively opening and closing in response to the pressure of the engine oil to supply the cooling water to the annular cooling pipe (7) of the piston seat (6). Piston seat device. 5. The plunger portion (10) according to claim 4, wherein the plunger portion (10) has an oil inflow passage (9) of the engine oil on the upper surface and a first cooling water passage (12) on which the coolant of the cylinder water jacket flows, and the opposite side. A plunger housing 14 having a second cooling water passage 13 connected to the annular cooling tube 7 and a sealing ring 17 for hermetic sealing around the upper side thereof, and having a plunger in the transverse direction. A passage 16 is provided and a spring 18 is connected between the bottom face and the bottom face of the plunger housing 14 so that the first coolant passage 12 and the plunger passage 16 are based on the pressure of the engine oil during engine operation. ) And a plunger (11) for opening the second coolant passage (13). The oil temperature sensor 19 for sensing the temperature of the engine oil and the control unit 20 for outputting a driving signal when the detected temperature from the oil temperature sensor 19 is equal to or higher than a predetermined temperature. And a solenoid valve (8) for supplying engine oil to the plunger portion (10) on the basis of a drive signal from the control portion (20).