JPS59158307A - Blow-by gas circulator - Google Patents

Abstract

PURPOSE:To eliminate engine trouble caused by freezing of PCV valve by providing PCV valve for regulating blow-by gas circulation in the path for circulating blow-by gas to suction system of internal-combustion engine. CONSTITUTION:Cylinder head 6, locker cover 8, suction path member 10, carburetor 12, air cleaner 14, etc. are arranged at the rear of radiator grill 4. Three-way hose 22 is used together with blow-by gas path 18 to circulate blow- by gas to suction system. PCV valve 26 will regulate circulation of blow-by gas and fixed to the back of cylinder head 6 and locker cover 8. Consequently overcooling and freezing of PCV valve can be prevented to eliminate engine trouble.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a blow-by gas reflux device, and in particular,
The present invention relates to a blow-by gas reflux device installed in the above-mentioned device to prevent the PCV (positive crankcase ventilation) pulp from freezing during running.

[Technical Background of the Invention] In an internal combustion engine, blow-by gas is generated that leaks from the combustion chamber into the crankcase through the gap between the piston and the cylinder wall. This main component is unburned gas and contains a large amount of HC.
, so it is necessary to guide it back into the combustion chamber and re-burn it. For this purpose, there is a blow-by gas reflux device.
A commonly used method is to use the negative pressure in the engine's intake system to draw air into the air cleaner, intake passage, or both, and the air is returned to the intake air and guided back into the combustion chamber for combustion.

[Problems with the background art] By the way, the blow-by gas recirculation device described above has (2) a blow-by gas recirculation amount to the intake system of 81? A PCv valve is provided to regulate the illumination. This PCV/lube may freeze due to moisture in the blow casing at extremely low temperatures. With the conventional PCV valve mounting position, there is little heat transfer from the engine even while the vehicle is running, and moreover, it is cooled by the wind while the vehicle is running (see Figure 5). For this reason, the PCV valve remains frozen while the vehicle is running, resulting in the inconvenience of causing engine malfunction. In other words, when the PC valve freezes, all of the flow gas flows into the air cleaner and from there into the vaporizer, and the moisture in the blow-high gas freezes inside the vaporizer, causing malfunction of the vaporizer, and The air cleaner also has the disadvantage that when a large amount of blow-high gas flows into the air cleaner, the oil contained therein becomes extremely dirty.

[Object of the invention] Therefore, the object of this invention is to eliminate the above-mentioned disadvantages and to
To realize a blow-high gas recirculation device that can prevent engine troubles caused by freezing of valves.

[Structure of the Invention] To achieve this object, we have invented an intake system for an internal combustion engine that recirculates blow-high gas! It is characterized in that a PCV/λ lubricant for adjusting the recirculation amount of blow-high gas is provided in each of the parts, and the PCV/lub is mounted at a position G in the bonnet of the vehicle where cooling can be avoided during running.

Embodiments of the invention] Examples of the invention will be described below in detail and specifically based on the drawings.

FIG. 1 shows a first embodiment of the present invention. Reference numeral 2 designates a bonnet of a vehicle, and inside the bonnet 1-2 there is a cylinder head 6 behind a radiator grille 4 located at the front in the direction of vehicle travel.
, a rocker cup \-8, etc., and an intake passage member 10, a carburetor 12, an air cleaner 14, etc. are arranged behind these. Incidentally, in the intake passage member 10, there is an intake passage 16 which communicates the carburetor 12 with an intake boat (not shown) in the cylinder head 6, and one end of which is connected to a gathering part j6a of the intake passage 16 on the side of the carburetor 12. A blow-high gas passage 18 that is open and whose other end is in contact with the cylinder head 6 is formed. Note that a plug 20 is inserted into a portion of the blow-high gas passage 18 in contact with the cylinder head 6 to close the portion. Reference numeral 22 denotes a three-way hose, and this three-way hose 22, together with the blow-high gas jH1 passage 18, constitutes a passage for circulating blow-high gas back into the intake system. This three-way hose 22 is connected to a separator chamber 24 formed on the upper surface of the rocker cover 8 located in a part of the cylinder head 6, the air cleaner 14, and the PCV valve 26 through pipes 28, 30, and 32, respectively. ing. by the way,
The CV valve 26 is attached to the cylinder of the blow-high gas passage 18 formed in the intake passage member 10 near the throat 6.

The installation location of this PC ■ valve 2G is cylinder head 6.
Since it is located at the rear rear surface of the rocker cover 8, the wind generated during driving is blocked by the cylinder 7 and the rocker cover 8, and does not flow directly into the PCV valve 26. It should be noted that this PC■ valve 26 has a function of adjusting the flow rate of the blow-by gas that is recirculated to the intake system.

FIG. 2 shows a second embodiment of the present invention, in which the PCV valve 26 is taken out in the middle of the blow-high gas passage 18 formed in the intake passage member 10, and is completely inside the intake passage member 10. It is buried in

Further, a pipe 32 directly connected to the three-way hose 22 is connected to the wall surface of the blow pie gas passage. The configuration other than this is the same as that of the first embodiment.

FIG. 3 shows a third embodiment of the present invention, in which the PCV valve 2
6 is attached directly facing the carburetor 12 side of the intake passage 16. Furthermore, l) A wall portion 34 is formed around the attachment portion of the CV valve 26 to the intake passage member 10, and therefore, the PCV valve 26 is surrounded by this wall portion 34 and is inserted into the intake passage member 10. It is installed in a completely immersed state. In the third embodiment, unlike the first and second embodiments, no blow pie gas passage 18 is formed in the intake passage member 10. Other configurations are as described above.
This is similar to the example.

FIG. 4 shows a fourth embodiment of the present invention, in which, like the third embodiment, the blow-high gas passage 18 is not formed, and the PCV
The valve 26 directly faces the intake passage 16 and is connected to the intake passage member 1.
It is installed at 0. A water jacket 36 is formed in the intake passage member 10 around the mounting portion of the PCV valve 26, and a water jacket throat 38 is also formed in the intake passage member 10 on the lower side of the intake passage 16. .

The configuration other than this is the same as the configuration of the first embodiment.

Since the present invention is constructed as described above, it operates as follows.

In the case of the configuration of the first embodiment, the PCV valve 26 that is frozen while the vehicle is parked or stopped receives heat transferred from the cylinder head 6 that becomes heated when the engine is started, and is thawed. In addition, the running wind A generated during running is blocked by the cylinder head "6" and the rotor car carrier 8, and does not directly hit the PCV valve 26 attached to the rear rear surface of the cylinder head 6, so that the running wind A causes the PCV valve 26 to There is no fear of it being cooled and freezing.

Furthermore, in the configurations of the second and third embodiments, the pcV valve 26 is embedded or recessed in the intake passage member 1o, so that the running wind A generated during driving is absorbed by the intake passage member 1o. 1o or the wall 34, the traveling wind A does not directly hit the PCV valve, and there is no risk that the PCv valve 26 will be cooled by the traveling wind A and freeze.

On the other hand, in the case of the configuration of the fourth embodiment, the wind generated during driving may directly hit the PcV valve 26;
A water jacket 36 is formed around the mounting part of the CVz4 valve 26, and water that cools the heated engine and becomes hot water flows inside it, so the Pc■ valve 26 is cooled by the running wind A. Even if the water is heated, the warm water flowing inside the water jacket 36 will warm the water and there is no risk of freezing. Furthermore, even if the Pc valve 26 freezes while the vehicle is parked or parked, it is quickly thawed by the warm water flowing through the water jacket 36 when the engine is started.

In this way, the PcV valve 2G is thawed quickly even if it freezes while the vehicle is parked or stopped, even though it is likely to freeze due to the wind A when the vehicle is running.

[Desire of the Invention] Effects J As is clear from the above detailed description, according to the configuration of the present invention, the following effects can be obtained.

■ Since the running wind does not directly hit the PC half, it is possible to prevent the PCV valve from overcooling and freezing while the vehicle is running, and it is possible to avoid engine troubles caused by freezing of the PCV valve.

■ The rear rear of the cylinder head has a hole or a PcV half is attached to the water jacket part.
Not only can you easily prevent the PCV valve from freezing, but it can also be used for a short period of time even if the PCV valve freezes while the vehicle is parked or parked. It can be thawed quickly to prevent engine trouble.

(2) In addition, in the case where the Pc (2) valve is embedded in the intake passage member, the soundproofing effect against the operating noise of the Pc (V) valve is increased, and unpleasant noises generated during operation can be reduced.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the blow-high gas reflux device according to the present invention, FIG. 1 is a schematic diagram of the first embodiment, and FIG.
The figure is a schematic view of the second embodiment, FIG. 3 is an enlarged view of the main part of the third embodiment, and FIG. 4 is an enlarged view of the main part of the fourth embodiment. FIG. 5 is a conventional diagram. In the figure, 2 is a bonnet, 4 is a radiator grill, 6 is a cylinder head, 8 is a rocker cover, IO is an intake passage member, 12 is a carburetor, 14 is an air cleaner, 16 is an intake passage, 18 is a blow-through passage, and 2o is a plug. , 22 is a three-way boss, 24 is a separator chamber, 26 is a PCV valve, 28, SO, 32 is a vibrator, 34 is a wall, 36.
38 is a water jacket. Agent Patent attorney Yoshi Saigo Engraving of the beautiful drawings (with no changes to the content Lj Figure 2 Figure 31..1 2 Figure 4 Figure 5 Procedure child V41 official copy (spontaneous) April 1, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case, Patent Application No. 30964, filed in 1982, 2, Title of the invention: Blow-pai gas reflux device 3, Relationship with the person making the amendment Patent applicant address: Takatsuka, Kamimura, Hamana-gun, Shizuoka Prefecture 300 names
(20B) Suzuki Motor Co., Ltd. Representative Osamu Suzuki

Claims (1)

[Claims] 1. A PC valve for adjusting the amount of blow-by gas recirculated is provided in the path for recirculating the blow-by gas to the intake system of the internal combustion engine, and the PCV valve is cooled under the hood of the vehicle while the vehicle is running. A blow-by gas reflux device characterized in that it is installed in a possible position. 2. The blow-by gas recirculation device according to claim 1, wherein the PC■ pulp is attached to an intake passage near the rear rear surface of a cylinder head of an internal combustion engine. 3. The blow-by gas recirculation device according to claim 1, wherein the PCV valve is embedded within an intake passage member. 4. The blow-by gas recirculation device as set forth in claim 1, wherein the PC■ valve is attached to the intake passage, and a water jacket is formed to flow through the attached portion. (1)