JPH0333417A - Pcv valve layout of internal combustion engine - Google Patents

Abstract

PURPOSE:To facilitate the prevention of a PCV valve and proximity thereof from freezing and the thawing of freezed portions by providing the PCV valve in a separator member defining the inside of a cylinder head cover to form a separating chamber. CONSTITUTION:A separating chamber 12 formed inside the cylinder head cover 8 of an internal combustion engine 2 is connected to an air cleaner through a first blow-by gas path 22, while connected to an intake path on the downstream side from a carbureter through a second blow-by path 24 and a PCV valve 28. The PCV valve 28 is provided in a separator member 10 for forming the separating chamber 12, so that the freezing of the PCV valve 28 and proximity thereof can be easily prevented and thawing of freezed portions can be easily performed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to PCV pulp layout for internal combustion engines,
In particular, the present invention relates to a PCV valve layout for an internal combustion engine that returns blow-by gas generated within the engine to an intake passage.

[Conventional technology]

There are three types of gas discharged into the atmosphere from an internal combustion engine: blow-by gas, evaporated fuel, and fuel exhaust, depending on the exhaust route. The blow-by gas is gas that leaks into the crankcase from the gap between the piston rings, and because it contains a large amount of unresolved hydrocarbons (HC), it is thought that it mainly leaks during the compression stroke.

Before exhaust gas regulations were implemented, the blow-by gas was directly released into the atmosphere through ventilation holes in the crankcase, but now it is returned to the intake system and combusted again.

Furthermore, as shown in FIG. 3, in a conventional PCV valve layout for an internal combustion engine, a separator member 110 is provided to partition the inside of the cylinder head force bar 108 of the internal combustion engine 102 to form a separation chamber 112. A first outlet 114 and a second outlet 1 for discharging blow-by gas to 112
16 are provided respectively. This first discharge port 114 and an air cleaner 1 air passage (not shown) are connected through a second pipe body 20.

A first blow-by gas passage 22 and a second blow-by gas passage 24 are formed in the first pipe body 1 and the second pipe body 20, respectively.

Further, the separator member 10 is provided with a pcV valve 28 located inside the cylinder head cover 8 to prevent freezing.

In other words, one end of the second pipe body 20, which is closer to the internal combustion engine, is extended to the vicinity of the separator member 10. Further, a mounting recess 26 is provided in the separator member IO in order to position the PCV valve 28 outside the separation chamber 12, for example, inside the rad cover 8 to the cylinder.
Install PCV valve 28 to. As shown in FIG. 1, the second pipe body 20 is connected to one end of this PCV valve 28.
The end on the internal combustion engine side is connected, and a suction hose 30 is connected to the other end with a clamp 32.

Next, the effect will be explained.

Blow-by gas generated in the internal combustion engine 2 when the internal combustion engine 2 is driven is collected in a separation chamber 12 formed by the inside of the cylinder rad cover 8 and the separator member 10, and passed through the first pipe body 18 to the air cleaner (Fig. At the same time, it is regulated by the PCV pulp 28 according to the intake pipe negative pressure, and is returned to the intake passage (not shown) via the second pipe body 20.

Furthermore, the PCV valve 28 is attached to the cylinder head cover 8.
By attaching it to the separator member 10 in the PCV valve 28, when the internal combustion engine 2 is stopped or restarted in a cold season, the heat receiving effect and heat retention of the PCV valve 28 can be further improved. Can prevent condensate from freezing.

As a result, it is possible to prevent freezing of the PCV valve 28 and its vicinity or to easily thaw frozen parts, prevent blockage of the second pipe body 20 of the internal combustion engine 2, improve sealing performance of the internal combustion engine 2, and prevent engine stall. This is practically advantageous.

Further, since the PCV valve 28 is provided in the separator member 10 and housed in the internal combustion engine 2, and is brought into direct contact with the lubricating oil in the internal combustion engine 2, the PCV pulp 28
8. Rust prevention treatment on the outer peripheral portion can be omitted, manufacturing cost can be reduced, and it is economically advantageous.

Furthermore, the PC ■ valve 28 is attached to the cylinder with the rad cover 8.
By attaching it to the separator member 10 inside the PCV pulp, when the internal combustion engine 2 is stopped or restarted in a cold season, the heat receiving effect and heat retention properties of the PCV pulp 28 can be further improved, and the condensation in the blow-by gas can be further improved. Prevents liquid from freezing.

〔Effect of the invention〕

As explained in detail above, according to the present invention, a separator member is provided in the cylinder to partition the inside of the rad cover to form a separation chamber, and a PCV valve is provided in the separator member to be located within the rad cover and to prevent freezing. Therefore, P
It can prevent freezing of the CV valve and its vicinity or easily thaw the frozen area, prevent blockage of the engine blow-by gas passage, and improve the sealing performance of the internal combustion engine.
Stalling of the internal combustion engine can be prevented, which is advantageous in practice.

Further, since the PCV valve is provided in the separator and brought into direct contact with the lubricating oil in the internal combustion engine, rust prevention treatment of the PCV pulp can be omitted, and manufacturing costs can be reduced, which is economically advantageous.

[Brief explanation of drawings]

Fig. 1.2 shows an embodiment of the present invention, Fig. 1 is a schematic enlarged plan view showing the installed state of the PCV valve of the internal combustion engine, and Fig. 2 is a schematic cross section showing the installed state of the PCV pulp of the internal combustion engine. be. FIG. 3 is a PCV of an internal combustion engine showing the prior art of this invention.
FIG. 3 is a schematic cross-sectional view of a valve. In the figure, 2 is an internal combustion engine, 4 is a cylinder block, and 6 is an internal combustion engine.
1 is a cylinder head, 8 is a cylinder cover, 10 is a separator member, 12 is a separation chamber, 14 is a first discharge port, 1
6 is a second discharge port, 18 is a first pipe body, 20 is a second pipe body, 2
2 is a first blow-by gas passage, 24 is a second blow-by gas passage, 26 is a mounting recess, 28 is a PCV valve, 30 is a suction hose, and 32 is a clamp. Figure 3 Procedural amendment (method) % formula % 1. Indication of the case Patent application No. 1-167675 2. Name of the invention PCV valve layout for internal combustion engine 3. Person making the amendment Relationship to the case Patent applicant residence Location 300 Takatsuka, Kami Village, Hamana District, Shizuoka Prefecture Name (2)
08) Suzuki Motor Co., Ltd. 46th Representative Director 101 03-292-4
411 (Representative) Address: 2-8 Kanda Ogawamachi, Chiyoda-ku, Tokyo (1) Submit formal drawings

Claims (1)

[Claims] 1. The separation chamber formed in the cylinder head cover of the internal combustion engine is connected to the air cleaner through the first blow-by gas passage, and the PCV is connected through the second blow-by gas passage.
In the PCV valve layout of an internal combustion engine that communicates with the intake passage on the downstream side of the carburetor via a valve, a separator member is provided that partitions the inside of the cylinder head cover to form the separation chamber, and this separator member has a separator member that partitions the inside of the cylinder head cover to form the separation chamber. 1. A PCV valve layout for an internal combustion engine, characterized in that the PCV valve is located at a location where the PCV valve is located to prevent freezing.