KR20010056921A - Cylinder head cover with blow-by gas filtering structure for tci diesel engines - Google Patents

Abstract

PURPOSE: A cylinder head cover having the blow-by gas filtering structure for a TCI(Turbo Charger Intercooler) diesel engine is provided to compact the structure of an engine by removing an additional filter. CONSTITUTION: A cylinder head cover protecting a valve device mounted on a cylinder head includes: a blow-by gas inflow pipe(14) mounted on the outside of a cylinder block to directly deliver blow-by gas into a cylinder head cover; a baffle plate(16) installed over an electrical device chamber in the cylinder head cover to filter the oil in the blow-by gas; an oil collector(18) formed at the center of the baffle plate to collect the oil filtered through the baffle plate; and a blow-by gas discharge pipe(20) formed at the upper end of the cylinder head cover to deliver the clean blow-by gas to an intake system of an engine. As oil is completely filtered by the cylinder head cover without an additional filter, the structure of the engine is compacted.

Description

CYLINDER HEAD COVER WITH BLOW-BY GAS FILTERING STRUCTURE FOR TCI DIESEL ENGINES}

The present invention relates to a cylinder head cover, and more particularly, by effectively filtering the blow-by gas generated in the crank chamber in the cylinder block by a filtration device installed in the cylinder head cover to eliminate the installation of a separate filtration device such as PCV A cylinder head cover having a blow-by gas filtration structure for a TSC diesel engine that enables the engine structure to be more compact.

In general, a cylinder head cover applied to an automobile engine is also called a rocker cover or a cam cover, and protects the valve device mounted on the cylinder head from the outside and simultaneously blows off the blow-by gas introduced through the oil passage. It also serves to transfer the system.

The blow-by gas is a gas that escapes into the crankcase from the gap between the cylinder and the piston in the compression stroke and the expansion stroke of the engine, and causes the air pollution when the blow-by gas is discharged to the outside. The blow-by gas leaked between the cylinder wall and the cylinder wall is introduced into the cylinder head cover through the oil passage or into the cylinder head cover through the blow-by gas dedicated line outside the cylinder block, and the oil is filtered first. The oil is re-filtered through an oil separator or a positive crankcase ventilator (PCV), and then reduced to an intake system for combustion.

The flow structure of the blow-by gas as described above will be briefly described with reference to FIG. 3.

The blow-by gas flowing into the cylinder head cover 102 through the oil passage or the external dedicated line flows through the inlet 106 of the baffle plate 104 installed on one side of the cover 102, and the baffle gas flows into the cylinder head cover 102. It adsorbs and hits a plurality of diaphragms 108 in the plate 104 and is primarily filtered, and the remaining blow-by gas is passed through an oil separator 114 via a transmission pipe 112 connected to an outlet 110 of the baffle plate 104. ), Only the oil component is filtered again into the oil pan by centrifugal force, and only the pure gas component is introduced into the intake system through the air hose 116 and burned in the combustion chamber.

However, when the blow-by gas is circulated using an external filtration device such as an oil separator as described above, a separate device is mounted outside the engine main body, which complicates the engine structure and assembles due to interference with other devices. There was a problem of deterioration.

Accordingly, the present invention is to solve the above problems, an object of the present invention is to improve the filtration structure of the blow-by gas in the cylinder head cover to make the engine structure more compact by eliminating the installation of a separate external filtration device To provide a cylinder head cover having a blow-by gas filtration structure for the TSI diesel engine.

1 is a simplified cross-sectional view of the inside of a cylinder head cover according to the present invention;

2 is a perspective view of a baffle plate of a cylinder head cover according to the present invention;

3 is a configuration diagram of a device in which a blow-by gas is circulated in the related art.

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

12 cylinder head cover 14 blow-by gas inlet pipe

16: baffle plate 18: oil collector

20 blow-by gas outlet 22 through-hole

24: partition 26: penetration barrier

28: U tube 30: air hose

In order to achieve the above object, the present invention,

A cylinder head cover for protecting a valve device mounted on a cylinder head from the outside, the cylinder head cover comprising: a blow-by gas inlet pipe that is mounted outside the cylinder block and directly sends blow-by gas generated in the crank chamber into the cylinder head cover; A baffle plate installed over the entire length of the cylinder head cover to filter oil in the blow-by gas flowing through the blow-by gas inlet pipe; An oil collector installed at a central portion of the baffle plate to collect oil filtered through the baffle plate; A cylinder head cover having a blow-by gas filtration structure for a TSI diesel engine including a blow-by gas outlet pipe formed at an upper end of the cylinder head cover facing the oil collector to transfer pure blow-by gas to the intake system of the engine; to provide.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention that can specifically realize the above object will be described.

1 and 2 show a preferred embodiment according to the present invention, wherein reference numeral 12 of FIG. 1 refers to the entire cylinder head cover.

The cylinder head cover 12 protects the valve device mounted on the cylinder head from the outside, and blows the blow-by gas into the cover to transfer the blow-by gas introduced through the oil passage to the intake system of the engine. Blow-by gas inlet pipe 14, baffle plate 16 for filtering the oil in the blow-by gas, oil collector 18 for collecting the filtered oil, and blow-by for sending blow-by gas to the intake system It has a blow-by gas filtration structure which consists of the gas outlet pipe 20.

The blow-by gas inlet pipe 14 is mounted on the outside of the cylinder block (not shown) as a dedicated line for blow-by gas transmission, and extends from the crank chamber in the cylinder block to one side of the cylinder head cover 12. Is connected to. At this time, the blow-by gas inlet pipe 14 extends through the through hole 22 of the baffle plate 16 into the cylinder head cover, and the through hole 22 is bent so that the inner diameter of the pipe becomes smaller. If the bent portion (R) to be seated on the baffle plate 16 can be easily coupled to both.

The baffle plate 16 is formed over the entire length of the cylinder head cover, unlike the structure that was formed only in a part of the conventional cylinder head cover.

FIG. 2 is a perspective view illustrating the baffle plate in more detail. Referring to this, the baffle plate 16 is flat and has a through hole 22 for penetrating the blow-by gas inlet pipe, and the center portion of the baffle plate 16 is recessed. Thus, the oil collector 18 is formed, and unlike the prior art, the partition wall is not formed on the plate surface, and only the cylinder head cover 12 is formed with the partition wall 24.

Since the baffle plate 16 is formed long over the entire length of the cylinder head cover 12, it is possible to further improve the filtration performance as compared to the past, thereby mounting an oil separator or PCV outside the cylinder head cover 12 Without this, oil can be sufficiently separated from the blow-by gas.

At this time, when the baffle plate 16 is formed over the entire length, engine oil is scattered by the action of mechanisms operating in the cylinder head cover 12, such as a rocker arm or a cam, to infiltrate the baffle plate 16. There is a possibility.

In this case, since the engine oil is mixed again in the blow-by gas, when the both ends of the baffle plate 16 are bent in a '-shape' to form an infiltration prevention film 26, the engine oil and the like scattered to the baffle plate 16. If it does not penetrate and stays in the lower part of the weight, it falls by its own weight, thereby preventing oil penetration.

In addition, the oil collector 18 formed by being recessed in the center of the baffle plate 16 is formed in a container shape, and when the oil is collected by colliding with the partition wall 24 while passing through the baffle plate 16, the predetermined oil is collected. Discharge into the cylinder head cover 12.

At this time, the lower pipe discharging oil from the oil collector 18 is bent into the U-shaped pipe 28 so that the oil scattered in the cylinder head cover 12 is accumulated by the oil accumulated in the U-shaped pipe 28. It is desirable to prevent penetration through and mixing with the blow-by gas.

On the other hand, a blow-by gas outlet pipe 20 is installed at the upper end of the cylinder head cover facing the baffle plate portion in which the oil collector 18 is formed, and passes through the baffle plate 16 to filter pure blow-by gas through the air hose. Transfer to 30.

The conventional oil separator is not installed in the blow-by gas outlet pipe 20, and the blow-by gas is directly transmitted to the intake system of the engine by directly connecting the cylinder head cover 12 and the air hose 30.

Looking at the blow-by gas filtration process in the cylinder head cover according to the present invention made as described above are as follows.

First, the blow-by gas generated in the crank chamber in the cylinder block is introduced into the cylinder head cover 12 through the blow-by gas inlet pipe 14 outside the cylinder block, and flows in the cylinder head cover 12 to both sides. The blow-by gas moved to the stage is introduced into the baffle plate 16 through the space S between the baffle plate 16 and the cylinder head cover 12, and the blow-by gas in the baffle plate 16 is partitioned ( 24, the oil is separated from the gas and lowered to the oil collector 18, only pure blow-by gas is discharged to the air hose 30 through the blow-by gas outlet pipe 20 and the filtered oil is collected in the oil collector ( 18) back into the cylinder head cover 12.

The cylinder head cover having the blowby gas filtration structure for the TSC diesel engine according to the present invention made as described above can sufficiently filter the oil in the blowby gas in itself, thereby adding a filtration device such as an oil separator or PCV. There is no need to install it, thereby making the engine structure more compact, improving assembly performance during engine production, and reducing the cost of a product by eliminating expensive external devices.

Claims (4)

In the cylinder head cover for protecting the valve device mounted on the cylinder head from the outside, A blow-by gas inlet pipe 14 mounted outside the cylinder block and directly sending blow-by gas generated in the crank chamber into the cylinder head cover; A baffle plate (16) installed over the entire length of the cylinder head cover for filtering oil in the blow-by gas flowing through the blow-by gas inlet pipe; An oil collector (18) formed at a central portion of the baffle plate to collect oil filtered through the baffle plate; A cylinder having a blow-by gas filtration structure for the TSC diesel engine, including; a blow-by gas outlet pipe (20) formed at an upper end of the cylinder head cover facing the oil collector to transfer pure blow-by gas to the intake system of the engine. Head cover. The method according to claim 1, The baffle plate The blow-by gas filtration structure for the TSC diesel engine is formed by bending both ends thereof to prevent the penetration of oil into the baffle plate due to the behavior of the cam device or the like in the cylinder head cover. Equipped with cylinder head cover. The method according to claim 1, The oil collector is Blow-by gas filtration for the TSC diesel engine, characterized by forming a U-shaped tube 28 in the lower portion thereof, to prevent the oil in the lower portion of the baffle plate from penetrating into the lower portion of the oil collector by oil accumulated in the U-shaped tube. Cylinder head cover with structure. The method according to claim 1, The blow-by gas inlet pipe Blow-by gas filtration for the TSC diesel engine which is formed to extend through the through-hole of the baffle plate and into the cylinder head cover, and is bent at the through-hole of the baffle plate so as to reduce the inner diameter of the blow-by gas inlet pipe. Cylinder head cover with structure.