JP6970253B1 - Engine with blow-by gas treatment and blow-by gas treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine provided with a blow-by gas treatment device and a blow-by gas treatment device capable of suppressing the oil contained in blow-by gas from staying at an outlet portion. A blow-by gas processing device 100 is provided in a head cover 4 of an engine and is separated from a separation unit 330 that separates blow-by gas BG taken in from blow-by gas intake units 111 and 112 into oil OL and gas G. A gas G after the oil OL is separated from the blow-by gas BG by the unit 330, and an outlet unit 40 for supplying the gas G guided from the separation unit 330 to the intake system of the engine is provided. The outlet portion 40 has an oil guide surface 740 for guiding the oil OL remaining in the gas G after being separated from the blow-by gas BG into the head cover 4. [Selection diagram] Fig. 2

Description

The present invention relates to an engine that is mounted on an internal combustion engine such as a diesel engine and includes a blow-by gas processing device and a blow-by gas processing device that separate blow-by gas into oil and gas and supply the gas to the intake system of the engine.

For example, the head cover of a diesel engine has a built-in blow-by gas filter. The blow-by gas filter separates blow-by gas into oil and a gas such as unburned gas.

Patent Document 1 discloses a breather device that prevents oil from flowing out. The breather device described in Patent Document 1 is provided with a front breather chamber and a rear breather chamber in the head cover chamber, and is provided with a breather outlet in the central portion. The breather outlet is connected to the front breather chamber and the rear breather chamber by a ventilation path. Even if oil enters the front breather chamber or the rear breather chamber when the engine is tilted to the front side or the rear side, the breather device described in Patent Document 1 is either the front breather chamber or the rear breather chamber. It is possible to prevent oil from entering the part from one side to the breather outlet. Therefore, gas can be discharged from the front breather chamber and the rear breather chamber without the outflow of oil.

Jikkenhei 6-53709 Gazette

However, in a breather device as described in Patent Document 1, an oil separating material such as glass wool provided in the breather chamber may not be able to completely separate blow-by gas into oil and gas. For example, the oil contained in the blow-by gas may not be completely separated from the blow-by gas by the oil separating material and may slightly pass through the oil separating material. Then, the oil that has passed through the oil separating material may stay in the ventilation passage, the breather outlet, or the like described in Patent Document 1, for example.

When the oil stays in the ventilation passage or the breather outlet, the internal pressure of the ventilation passage or the breather outlet is relatively high, so that the accumulated oil may seep out from the vicinity of the breather outlet, for example, to the outside of the engine.

Alternatively, when the oil stays in a ventilation path, a breather outlet, or the like, the stayed oil may mix with the water vapor contained in the blow-by gas to form an emulsion. Emulsion formation can block blow-by gas pathways such as vents and breather outlets. If the blow-by gas path is blocked, the internal pressure of the engine rises, and parts such as the oil gauge guide provided in the crankcase may be damaged. Further, if the blow-by gas path is blocked, the internal pressure of the engine rises, and the turbocharger may suck in oil.

As described above, when the oil contained in the blow-by gas stays in the ventilation passage or the breather outlet, the oil seeps out to the outside of the engine or the blow-by gas path is blocked.

The present invention has been made to solve the above problems, and provides an engine including a blow-by gas treatment device and a blow-by gas treatment device capable of suppressing oil contained in blow-by gas from staying at an outlet portion. The purpose is.

The object is achieved by a blow-by gas processing apparatus for processing a blow-by gas generated in the engine, the pre-Symbol blowby gas separation unit for separating the oil and gas, provided in an upper portion of the head cover of the engine, to the separation unit an outlet mounting portion having a through hole for passing the gas separated from the good Ri before Symbol blowby gas, attached to the outlet mounting portion of the engine by temporarily accommodating the gas passing through the through hole and a container body for supplying intake system, said outlet mounting portion, said outlet mounting portion before and Symbol separated from the blow-by gas is inclined downwardly toward the through hole from the mating surfaces of the container body is solved by the blow-by gas processing device according to the present invention characterized by having an oil guide inclined surface for guiding the oil remaining in the gas in the inner portion of the head cover.

According to the blow-by gas processing apparatus according to the present invention, the outlet mounting portion, having an oil guide inclined surface for guiding the oil remaining in the gas which is separated from the blow-by gas in the inner portion of the head cover. Accordingly, even when the oil gas separated from the blow-by gas is left by the separation unit, the blow-by gas processing apparatus according to the present invention, the oil outlet mounting portion and the container body included in the blow-by gas It is possible to suppress the accumulation in.

Further, according to the blow-by gas processing apparatus according to the present invention, the oil guide inclined surface is inclined downward from the mating surfaces of the outlet mounting portion and the container body toward the through hole. Therefore, oil remaining in the gas which is separated from the blow-by gas by the separation unit flows downwardly oil pilot slopes toward the through-hole, it passes through the through hole, is reliably guided by the inner portion of the head cover NS. Thereby, the blow-by gas processing apparatus according to the present invention can more reliably suppress the oil contained in the blow-by gas from staying in the outlet mounting portion and the container body.

In the blow-by gas treatment apparatus according to the present invention, the oil guide inclined surface is preferably formed over the entire region extending from the mating surface to the inner surface of the through hole.

According to the blow-by gas treatment apparatus according to the present invention, the oil guide inclined surface is formed in the entire region extending from the mating surface between the outlet mounting portion and the container body to the inner surface of the through hole. Therefore, oil remaining in the gas which is separated from the blow-by gas by the separation portion is suppressed to or staying caught in at least a portion of the outlet attachment portion, an oil pilot slopes toward the through-hole It flows smoothly downward. The oil flowing through the oil guide inclined surface toward the through-hole passes through the through hole, is positively guided by the inner portion of the head cover. Thereby, the blow-by gas processing apparatus according to the present invention can more reliably suppress the oil contained in the blow-by gas from staying in the outlet mounting portion.

In the blow-by gas treatment apparatus according to the present invention, preferably, the oil guide inclined surface is characterized in that it exhibits a part of the surface of the cone.

According to the blow-by gas processing apparatus according to the present invention, since the oil guiding inclined surfaces present a portion of the surface of the cone, the oil remaining in the gas which is separated from the blow-by gas by the separation unit, the oil guide slope The surface can flow smoothly downward toward the through hole.

Blow-by gas processing apparatus according to the present invention is preferably provided in the inner portion of the head cover, and a guide wall portion for guiding the front SL gas separated from the blow-by gas to the outlet mounting portion, the interior of the head cover It provided an oil guide portion for guiding the oil separated from the blow-by gas toward the inside of the engine, further comprising a guided on the inner part of the head cover from the container body by the oil guide inclined surfaces The oil is characterized in that it flows through the guide wall portion and is guided to the oil guide portion.

According to the blow-by gas processing apparatus according to the present invention, the oil guided from the container body into the inner portion of the head cover by the oil guide inclined surface is guided to the oil guide portion flows through the guide walls. Oil guide section is provided inside the head cover, the separated oil from the blow-by gas can and benzalkonium be guided toward the inside of the engine. Accordingly, the oil separated from the blow-by gas, for example be collected in the oil pan and oil containers provided on the inner portion of the engine is suppressed to be discharged from the container body.

The object is achieved by an engine provided with a blow-by gas processing apparatus for processing the blow-by gas generated in the engine, the blow-by gas processing apparatus comprises a separating unit for separating the pre-Symbol blow-by gas in the oil and gas, the head cover of the engine provided in the upper portion, an outlet mounting portion having a through hole for passing the gas separated from the by Ri before Symbol blow-by gas in the separation unit, attached to the outlet mounting portion, the gas that has passed through the through hole The gas has a container body that temporarily accommodates the gas and supplies the gas to the intake system of the engine, and the outlet mounting portion is downward from the mating surface of the outlet mounting portion and the container body toward the through hole. It is solved by the inclined engine according to the present invention characterized by having an oil guide inclined surface of the oil remaining in the prior SL gas separated to guide the inner portion of the head cover from the blow-by gas.

According to the engine according to the present invention, the outlet mounting portion of the blow-by gas processing device comprises an oil guide inclined surface for guiding the oil remaining in the gas which is separated from the blow-by gas in the inner portion of the head cover. Accordingly, even when the oil gas separated from the blow-by gas is left by the separation unit, the engine according to the present invention, oil contained in blow-by gas staying in the outlet mounting portion and the container body It can be suppressed.

According to the present invention, it is possible to provide an engine including a blow-by gas treatment device and a blow-by gas treatment device capable of suppressing the oil contained in the blow-by gas from staying at the outlet portion.

It is sectional drawing which shows the engine which includes the blow-by gas processing apparatus which concerns on embodiment of this invention. It is sectional drawing in the XZ plane which shows the structural example of the blow-by gas processing apparatus which concerns on this embodiment. It is a perspective view which shows the structural example of the outlet part of the blow-by gas processing apparatus which concerns on this embodiment. FIG. 4 is a cross-sectional view of the cut surface AA shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are added, but the scope of the present invention is particularly limited to the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects. Further, in each drawing, the same components are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

(Overview of Engine 1)
FIG. 1 is a cross-sectional view showing an engine including a blow-by gas processing apparatus according to an embodiment of the present invention.
The engine 1 shown in FIG. 1 is an internal combustion engine, for example, an industrial diesel engine. The engine 1 is a multi-cylinder engine such as a supercharged high-output 3-cylinder engine or a 4-cylinder engine equipped with a turbocharger. The engine 1 is mounted on a vehicle such as a construction machine, an agricultural machine, or a lawn mower.

(Structural example of engine 1)
The engine 1 includes a cylinder block 2, a cylinder head 3, a head cover 4, an oil pan 7, and a blow-by gas processing device 100. The cylinder head 3 is assembled on the cylinder block 2. The head cover 4 is assembled on the cylinder head 3. The cylinder block 2 has an upper cylinder 5 and a lower crankcase 6. The oil pan 7 is arranged at the lower part of the crankcase 6. The piston 8 is arranged in the cylinder 5. The crankshaft 9 is arranged in the crankcase 6. The piston 8 is connected to the crank shaft 9 via a connecting rod 10.

As shown in FIG. 1, the cylinder 5 has a valve drive cam chamber 11. The valve drive cam shaft 12 is housed in the valve drive cam chamber 11. The tappet 13 can move up and down along the tappet guide hole 14. The lower part of the tappet 13 rests on the valve camshaft 12. The push rod 15 passes through the insertion hole 16. The rocker arm 17 is arranged in the head cover 4. The upper end of the push rod 15 is in contact with the rocker arm 17.

The rocker arm 17 is urged toward the upper end of the push rod 15 by a spring 18. The intake valve 19 and the exhaust valve 20 move up and down by the power transmitted via the push rod 15 and the rocker arm 17 by rotating the valve camshaft 12, and open and close the intake port and the exhaust port, respectively. ..

As shown in FIG. 1, for example, an oil outflow hole 21 is provided in the tappet 13. An oil drop hole 22 is provided from the valve cam chamber 11 to the crankcase 6. As a result, the insertion hole 16, the inside of the tappet 13, the oil outflow hole 21, the valve cam chamber 11, and the oil drop hole 22 form an oil return path 99. The oil return path 99 can return the oil in the head cover 4 to the oil pan 7 through the inside of the crankcase 6. Each cylinder of the cylinder head 3 is connected to an intake passage 30 and an exhaust passage 31.

As shown in FIG. 1, blow-by gas BG may be generated in at least one of the compression stroke and the combustion stroke of the engine 1. The blow-by gas BG is a gas that flows into the crankcase 6 through the gap between the piston 8 and the cylinder 5 shown in FIG. 1, and includes unburned fuel components, burned gas components, and mist of oil and the like. There is. The blow-by gas BG leaking from the gap between the cylinder 5 and the piston 8 to the crankcase 6 rises into the head cover 4 through, for example, the oil return path 99 described above. That is, when the blow-by gas BG leaks into the crankcase 6 from the gap between the cylinder 5 and the piston 8, for example, the oil drop hole 22 of the oil return path 99 as the blow-by gas passage path, the valve cam chamber 11, and the tappet. It penetrates into the head cover 4 through the oil outflow hole 21 of the 13 and the insertion hole 16. The oil return path 99 described above is an example of a blow-by gas passage path. The blow-by gas passage route is not limited to the oil return route 99 described above.

As shown in FIG. 1, a blow-by gas processing device 100 is provided in the head cover 4. The blow-by gas processing apparatus 100 has a role of separating the blow-by gas BG into an oil OL (see FIG. 2) and a gas (treated gas) G (see FIG. 2) from which the mist of the oil OL is separated. For example, the gas G contained in the blow-by gas BG is sent to the pipe 41 connected to the external intake system of the head cover 4 via the blow-by gas processing device 100. The gas G contained in the blow-by gas BG is, for example, an unburned gas component or a combustion gas component obtained by removing the oil OL and the mist of the oil OL from the blow-by gas BG. The oil (lubricant component) OL is collected in the oil pan 7 through, for example, the head cover 4, the cylinder head 3, and the oil return path 99.

The connection pipe 50T and the pipe 41 of the intake pipe 50 shown in FIG. 1 are connected to each other by a blow-by gas mixing joint 70. When the new intake AR is sucked into the intake pipe 50, it passes through the air cleaner 52 and the connecting pipe 50T and enters the main pipe 71 of the blow-by gas mixing joint 70. On the other hand, the gas G after the oil OL is separated from the blow-by gas BG by the blow-by gas processing device 100 enters the sub-pipe 72 of the blow-by gas mixing joint 70 from the outlet portion 40 of the blow-by gas processing device 100 through the pipe 41. As a result, the new intake AR and the gas G are mixed in the blow-by gas mixing joint 70 to become the intake air B.

On the other hand, the exhaust gas from the exhaust passage 31 is supplied to the turbine 62 of the turbocharger 60 to rotate the turbine 62 and the blower 61 at high speed. The mixed intake air B is supplied to the blower 61 of the turbocharger 60 and compressed. The compressed intake air C is supercharged to the intake passage 30 of the intake system.

(Blow-by gas processing device 100)
Next, a preferable structural example of the blow-by gas treatment apparatus 100 shown in FIG. 1 will be described with reference to FIGS. 2 to 4.
FIG. 2 is a cross-sectional view taken along the XX plane showing a structural example of the blow-by gas processing apparatus according to the present embodiment.
FIG. 3 is a perspective view showing a structural example of an outlet portion of the blow-by gas processing apparatus according to the present embodiment.
FIG. 4 is a cross-sectional view of the cut surface AA shown in FIG.

Here, the X direction shown in FIGS. 1 to 4 is the front-rear direction of the engine 1 shown in FIG. 1, that is, the axial direction of the crank shaft 9. The Y direction is the left-right direction of the engine 1. The Z direction is the vertical direction of the engine 1. The X, Y, and Z directions are orthogonal to each other.

As shown in FIGS. 1 and 2, the blow-by gas processing device 100, also referred to as a breather device or a bleeder, is arranged in the head cover 4. As shown in FIG. 2, the blow-by gas processing apparatus 100 can separate the blow-by gas BG into an oil OL and a gas G, and guide the oil OL and the gas G by different routes.

The blow-by gas processing apparatus 100 shown in FIG. 2 has a main structural portion 101 and an outlet portion 40. The main structural portion 101 is provided in the head cover 4. The outlet portion 40 is provided so as to project above the head cover 4. Moreover, as shown in FIG. 2, the outlet portion 40 is arranged, for example, at a position CP at a substantially central position with respect to the front-rear direction, which is the X direction of the main structural portion 101. A detailed structural example of the outlet portion 40 will be described after explaining the detailed structural example of the main structural portion 101.

<Main structural part 101 of blow-by gas processing apparatus 100>
First, a preferable structural example of the main structural portion 101 of the blow-by gas treatment apparatus 100 will be described with reference to FIGS. 1 and 2.
As shown in FIGS. 1 and 2, the main structural portion 101 is housed in the head cover 4. Specifically, the head cover 4 has an upper surface portion 4A, a front surface portion 4B, a rear surface portion 4C, and left and right surface portions 4D. The main structural portion 101 is arranged in a space surrounded by the upper surface portion 4A, the front surface portion 4B, the rear surface portion 4C, and the left and right surface portions 4D. The main structural portion 101 takes in and guides the blow-by gas BG, and separates the oil OL contained in the blow-by gas BG from the blow-by gas BG. Then, the main structural portion 101 guides the oil OL and the gas G by separate routes so that the oil OL and the gas G separated from the blow-by gas BG do not leak to the outside of the engine 1. Therefore, the head cover 4 is held by the cylinder head 3 in a state where the inside of the head cover 4 is kept airtight with respect to the outside of the head cover 4. As a result, the blow-by gas BG and the oil OL and the gas G separated from the blow-by gas BG are suppressed from leaking to the outside of the engine 1.

As shown in FIG. 2, the main structural portion 101 generally includes a first blow-by gas intake portion 111, a second blow-by gas intake portion 112, a separation portion 330, a first oil guide groove portion 151, and a first portion. 2 It has an oil guide groove portion 152, a first oil drain 161 and a second oil drain 162. Each of the first oil guide groove portion 151 and the second oil guide groove portion 152 is an example of the "oil guide portion" of the present invention. The first oil drain 161 and the second oil drain 162 are examples of the "oil drain" of the present invention.

As shown in FIG. 2, the main structural portion 101 includes a partition wall portion 200, a guide wall portion 203, and a guide plate 295 in order to form the above-mentioned components. The partition wall portion 200 is arranged in the XY plane in the head cover 4, that is, horizontally, and partitions the lower region 4P of the head cover 4 and the upper regions 4Q and 4R. Therefore, the lower region 4P and the upper regions 4Q and 4R are spaces that are independent of each other.

As shown in FIG. 2, the guide wall portion 203 guides only the treated gas G, that is, the gas G after separating the oil OL mist from the blow-by gas BG to the outlet portion 40. The guide wall portion 203 is arranged between the partition wall portion 200 and the upper surface portion 4A of the head cover 4, and partitions the upper region 4Q and the upper region 4R. Therefore, the upper region 4Q and the upper region 4R are spaces that are independent of each other.

<1st blow-by gas intake section 111 and 2nd blow-by gas intake section 112>
Next, the first blow-by gas intake unit 111 and the second blow-by gas intake unit 112 will be described with reference to FIG.
The first blow-by gas intake portion 111 and the second blow-by gas intake portion 112 are holes formed by the partition wall portion 200 and the guide plate 295, and take in the blow-by gas BG. The partition wall portion 200 is divided into a first guide lower surface portion 231 side and a second guide lower surface portion 232 side with the separation portion 330 at the center. The first blow-by gas intake portion 111 is provided at a position closer to the front surface portion 4B (that is, the front side of the engine 1) and takes in the blow-by gas BG from the front side. Further, the second blow-by gas intake portion 112 is provided at a position closer to the rear surface portion 4C (that is, the rear side of the engine 1) and takes in the blow-by gas BG from the rear side.
The guide plate 295 shown in FIG. 2 has a portion separated from the partition wall portion 200 so as to face the first guide lower surface portion 231 and the second guide lower surface portion 232, and is arranged along the XY plane. There is.

As shown in FIG. 1, when the blow-by gas BG that has risen in the crankcase 6 reaches the lower region 4P of the head cover 4 shown in FIG. 2, it passes through the first blow-by gas intake portion 111 and is the second of the partition wall portion 200. 1 It is taken in between the guide lower surface portion 231 and the guide plate 295, and is guided toward the separation portion 330. Alternatively, the blow-by gas BG is taken in between the second guide lower surface portion 232 and the guide plate 295 through the second blow-by gas intake portion 112, and is guided toward the separation portion 330. Then, the blow-by gas BG reaches the impactor 120 of the separation portion 330 at the central position RP with respect to the X direction, which is the front-rear direction, as shown by the arrow shown in FIG.

<Impactor 120 of separation unit 330>
The separation unit 330 shown in FIG. 2 has an impactor 120, a filter 130, and a collision plate 133, and is between the first blow-by gas intake unit 111 and the second blow-by gas intake unit 112 in the front-rear direction of the engine 1. It is provided in. More specifically, the separation portion 330 is provided at the central portion, that is, at the central position RP between the first oil drain 161 and the second oil drain 162 in the front-rear direction of the engine 1.

The impactor 120 has the function of a nozzle or an orifice. The axial direction of the throttle hole 121 of the impactor 120 is a so-called vertical throttle hole along the vertical direction or the vertical direction which is the Z direction. The impactor 120 is a flow velocity increasing operation unit capable of increasing the flow velocity of the blow-by gas BG by passing the blow-by gas BG upward along the throttle hole 121. The impactor 120 is arranged at the center position RP with respect to the X direction of the partition wall portion 200. As a result, the blow-by gas BG taken in by the first blow-by gas intake unit 111 and the blow-by gas BG taken in by the second blow-by gas intake unit 112 are evenly guided to the impactor 120. The impactor 120 guides the blow-by gas BG to the filter 130 after increasing the flow velocity of the blow-by gas BG flowing into the throttle hole 121.

<Filter 130 of separation unit 330>
As shown in FIG. 2, the filter 130 is interchangeably mounted on the partition wall portion 200. The filter 130 is arranged between the collision plate 133 and the impactor 120. That is, an impactor 120 as a flow velocity increasing operation unit is arranged on the lower surface of the filter 130. A collision plate 133 is arranged on the upper surface of the filter 130. The collision plate 133 is, for example, a metal plate and extends in the horizontal direction. The collision plate 133 separates the oil OL and the gas G containing no mist of the oil OL by colliding the blow-by gas BG that has passed through the filter 130 with the flow velocity increasing. The filter 130 is made of a material such as glass wool. However, the material of the filter 130 is not particularly limited. The blow-by gas BG having an increased flow velocity is separated into an oil OL and a gas G containing no mist of the oil OL by colliding with the collision plate 133 while removing foreign matter through the filter 130. Then, the gas G separated from the blow-by gas BG by the separation unit 330 is discharged from the filter 130.

As described above, the guide wall portion 203 is provided between the partition wall portion 200 and the upper surface portion 4A of the head cover 4. Therefore, the gas G containing no mist of oil OL discharged from the filter 130 is guided by the guide wall portion 203 and guided to the outlet portion 40 through the passage 135 of the upper region 4Q. Since the guide wall portion 203 is arranged in the head cover 4, the gas G separated by the separation portion 330 can be guided to the outlet portion 40.

The separation unit 330 is located at the central position RP in the X direction shown in FIG. 2, and serves as an assembly unit capable of collecting the blow-by gas BG from the front side and the rear side of the engine 1 toward the central portion in the X direction. Play the role of. As described above, since the separation portion 330 is located at the central position RP with respect to the X direction of the head cover 4, the blow-by gas BG is collected in the central portion from the front side and the rear side with respect to the X direction in the head cover 4, and the oil OL and the oil are collected. It can be separated into a gas G that does not contain OL mist.

<1st oil guide groove 151 and 2nd oil guide groove 152>
The first oil guide groove portion 151 shown in FIG. 2 has a groove shape and is provided from the front surface portion 4B of the head cover 4 to the vicinity of the filter 130. Similarly, the second oil guide groove portion 152 has a groove shape and is provided from the rear surface portion 4C of the head cover 4 to the vicinity of the filter 130. The first oil guide groove portion 151 and the second oil guide groove portion 152 guide the oil OL separated from the blow-by gas BG by the separation portion 330. The first oil guide groove portion 151 is a specific structural example of the "first oil guide portion" of the present invention, and the oil OL discharged from the filter 130 is directed to the X1 direction when the engine 1 of FIG. 1 is tilted forward. It can be guided to the front indicated by (1) and guided to the first oil drain 161 on the front side. Similarly, the second oil guide groove portion 152 is a specific structural example of the "second oil guide portion" of the present invention, and the oil OL discharged from the filter 130 is placed on the rear side of the engine 1 in FIG. When it is tilted, it can be guided to the rear indicated in the X2 direction and guided to the second oil drain 162 on the rear side.

The first oil guide groove portion 151 and the second oil guide groove portion 152 may be connected to each other. In this case, of the one oil guide groove portion, the portion provided from the filter 130 toward the front side of the engine 1 is referred to as the first oil guide groove portion 151, and is provided from the filter 130 toward the rear side of the engine 1. The portion is referred to as a second oil guide groove portion 152.

<1st oil drain 161 and 2nd oil drain 162>
The first oil drain 161 is provided on the front side of the engine 1 and has a cylindrical shape, for example. The first oil drain 161 is provided in the head cover 4 downward in the Z1 direction at a position in front of the first guide lower surface portion 231 of the partition wall portion 200. The first oil drain 161 has a check valve, temporarily stores the oil OL guided by the first oil guide groove portion 151, and discharges the oil OL into the engine 1. Similarly, the second oil drain 162 is provided on the rear side of the engine 1 and has a cylindrical shape, for example. The second oil drain 162 is provided in the head cover 4 downward in the Z1 direction at a position behind the second guide lower surface portion 232 of the partition wall portion 200. The second oil drain 162 has a check valve, temporarily stores the oil OL guided by the second oil guide groove portion 152, and discharges the oil OL into the engine 1.

As a result, when the engine 1 is tilted to the front side, the oil OL separated from the blow-by gas BG by the separation portion 330 is guided in the X1 direction by the first oil guide groove portion 151, and is temporarily stored in the first oil drain 161. After that, it is discharged in the Z1 direction through the first oil drain 161. Similarly, when the engine 1 is tilted to the rear side, the oil OL separated from the blow-by gas BG by the separation portion 330 is guided in the X2 direction by the second oil guide groove portion 152, and is temporarily provided to the second oil drain 162. After being stored, it is discharged in the Z1 direction through the second oil drain 162. In the head cover 4, the oil OL discharged from the first oil drain 161 and the second oil drain 162 is collected in the oil pan 7 from the head cover 4 shown in FIG. 1 through the above-mentioned oil return path 99, for example. Alternatively, the discharged oil OL can be collected, for example, in an oil container (not shown). As a result, the oil OL discharged from the first oil drain 161 and the second oil drain 162 is discharged into the engine 1 and does not leak to the outside of the engine 1.

<Structural example of the outlet 40 of the blow-by gas treatment device 100>
Next, a structural example of the outlet portion 40 of the blow-by gas processing apparatus 100 will be described with reference to FIGS. 2 to 4.
As described above, the outlet portion 40 shown in FIG. 2 is provided in the head cover 4 so as to project in the Z direction. The outlet portion 40 is arranged, for example, at a position CP substantially in the center with respect to the front-rear direction which is the X direction of the main structural portion 101 of the head cover 4.

The outlet portion 40 adjusts the pressure of the gas G at, for example, the position CP at the substantially center of the engine 1, and sends only the gas G guided from the main structural portion 101 to the pipe 41 of the intake system of the engine 1. The outlet portion 40 is provided with, for example, a pressure regulating valve (diaphragm) 350 (see FIG. 4). The pressure regulating valve 350 provided at the outlet portion 40 suppresses the new intake AR from flowing into the engine 1 through the blow-by gas mixing joint 70 and the intake system pipe 41 (see FIG. 1).

As shown in FIGS. 3 and 4, the outlet portion 40 can return the gas G separated from the blow-by gas BG by the separation portion 330 to the intake system of the engine 1 via the pipe 41 and reburn it. .. This prevents the gas G separated from the blow-by gas BG from being released to the outside of the engine 1, and can improve the environmental performance of the engine 1.

As shown in FIGS. 3 and 4, the outlet portion 40 has an outlet mounting portion 700 and a container body 750 fixed to the outlet mounting portion 700. The outlet mounting portion 700 is a part of the head cover 4, and is formed so as to bulge outward from the upper surface portion 4A of the head cover 4 around a through hole 680 for gas discharge provided in the head cover 4. The through hole 680 for discharging gas is provided so as to penetrate the upper surface portion 4A of the head cover 4 in a circular shape along the Z direction. That is, the central axis of the through hole 680 for gas discharge is along the Z direction. The through hole 680 allows the gas G separated from the blow-by gas BG by the separation portion 330 to pass through.

The container body 750 shown in FIGS. 3 and 4 is also called a spacer or the like, and is installed on the outlet mounting portion 700. The positions of the four corners of the container body 750 are detachably fixed to the outlet mounting portion 700 by using, for example, four screws 751. As a result, the container body 750 is removable from the outlet mounting portion 700, and the operator or the like can perform maintenance on the container body 750 and the outlet mounting portion 700, or replace the container body 750. .. The pressure regulating valve 350 described above is mounted on the upper surface 702 of the container body 750.

As shown in FIG. 4, the container body 750 is a substantially rectangular parallelepiped member having a lower internal space 720 and an upper internal space 721. The internal spaces 720 and 721 are connected to each other and allow the gas G to pass through. The upper internal space 721 is connected to the pipe 41 as shown in FIG. The internal spaces 720 and 721 of the container body 750 temporarily accommodate the gas G rising from the inside of the head cover 4 through the through hole 680 of the outlet mounting portion 700, and pass through the pipe 41 to the intake system side of the engine 1 shown in FIG. Can be supplied to.

As shown in FIG. 4, the outlet mounting portion 700 has a mating surface 730 and an oil guide inclined surface 740. The oil guide inclined surface 740 of the present embodiment is an example of the "oil guide surface" of the present invention. The mating surface 730 and the oil guide inclined surface 740 are provided around the through hole 680 with the through hole 680 as the center. The mating surface 730 on the upper end side of the outlet mounting portion 700 is a portion that comes into contact with and adheres to the mating surface 770 on the lower end side of the container body 750. The mating surfaces 730 and 770 are flat surfaces, parallel to the horizontal installation surface on which the vehicle with the engine is placed, and along the XY plane. That is, the mating surfaces 730 and 770 are horizontal. A sealing member 745 is provided between the mating surfaces 730 and 770. The seal member 745 suppresses the gas G from leaking to the outside of the engine 1 through the gap between the mating surface 730 of the outlet mounting portion 700 and the mating surface 770 of the container body 750.

As shown in FIG. 4, the oil guide inclined surface 740 is a portion connected to the mating surface 730 and the through hole 680, and is inclined downward from the mating surface 730 toward the through hole 680. The oil guide inclined surface 740 guides the oil OL remaining in the gas G separated from the blow-by gas BG by the separation portion 330 into the head cover 4. The details will be described later. As shown in FIG. 3, the oil guide inclined surface 740 presents a part of the surface of the pyramid, specifically a part of the surface of the cone. That is, the oil guide inclined surface 740 is an inner surface of the outlet mounting portion 700, and is a surface inclined like a mortar that tapers toward the inside of the head cover 4 from the inside of the container body 750. The oil guide inclined surface 740 is not limited to presenting a part of the surface of the cone, for example, may present a part of the surface of the triangular pyramid, and may present a part of the surface of the quadrangular pyramid. May be presented. The oil guide inclined surface 740 is formed so as to be inclined by a predetermined inclination angle W with respect to the horizontal installation surface on which the vehicle equipped with the engine is placed. The inclination angle W of the oil guide inclined surface 740 is, for example, about 15 degrees or more and 30 degrees or less. According to this, while suppressing the vertical dimension (Z direction) of the engine 1, the oil OL remaining in the gas G separated from the blow-by gas BG by the separation unit 330 is surely guided in the head cover 4. Can be done.

As shown in FIG. 4, the upper end portion 741 of the oil guide inclined surface 740 corresponds to the inner end portion of the mating surface 730 of the outlet mounting portion 700, and is almost covered with the mating surface 770 of the container body 750. That is, the upper end portion 741 of the oil guide inclined surface 740 is hardly exposed to the internal space 720. Therefore, the horizontal mating surface 730 of the outlet mounting portion 700 is hardly exposed to the internal space 720. Further, the lower end portion 742 of the oil guide inclined surface 740 is gently and continuously formed on the inner peripheral surface 681 of the through hole 680. As described above, the oil guide inclined surface 740 extends from the mating surface 770 of the container body 750 to the inner peripheral surface 681 of the through hole 680. In other words, the oil guide inclined surface 740 is formed in the entire region extending from the mating surface 770 of the container body 750 to the inner peripheral surface 681 of the through hole 680.

(Example of operation of blow-by gas treatment device 100)
Next, an example of the operation of the blow-by gas processing device 100 in the engine 1 described above will be described with reference to FIGS. 1 to 4.
The blow-by gas BG leaking from between the piston 8 and the cylinder 5 shown in FIG. 1 reaches the lower region 4P of the head cover 4 shown in FIG. The blow-by gas BG passes between the first blow-by gas intake portion 111 and the second blow-by gas intake portion 112, and is between the first guide lower surface portion 231 and the guide plate 295, and the second guide lower surface portion 232 and the guide plate 295. It is taken in between and guided toward the separation part 330. Then, the blow-by gas BG guided toward the separation portion 330 reaches the impactor 120 of the separation portion 330 at the central position RP.

The impactor 120 guides the blow-by gas BG to the filter 130 after increasing the flow velocity of the blow-by gas BG flowing into the throttle hole 121. The blow-by gas BG having an increased flow velocity is separated into an oil OL and a gas G containing no mist of the oil OL by colliding with the collision plate 133 through the filter 130.

The gas G separated from the blow-by gas BG by the separation portion 330 is discharged from the filter 130, rises and is guided along the guide wall portion 203, and passes through the passage 135 of the upper region 4Q to the outlet portion 40. Sent. The gas G sent to the outlet portion 40 passes through the through hole 680 of the outlet mounting portion 700 and is temporarily accommodated in the internal spaces 720 and 721 of the container body 750. Then, when the internal pressure of the internal spaces 720 and 721 becomes equal to or higher than the predetermined pressure, or when the internal pressure of the pipe 41 becomes lower than the predetermined pressure, the gas G temporarily contained in the internal spaces 720 and 721 of the container body 750 is released. It passes through the pressure regulating valve 350, is guided to the auxiliary pipe 72 of the blow-by gas mixing joint 70 through the pipe 41, and is mixed with the new intake AR.

Here, the separation unit 330 may not be able to completely separate the blow-by gas BG into the oil OL and the gas G. For example, the oil OL contained in the blow-by gas BG may not be completely separated from the blow-by gas BG by the separation portion 330 and may be guided to the outlet portion 40. Then, the oil OL contained in the blow-by gas BG may stay in the outlet portion 40. For example, if a horizontal plane exists in the path through which the blow-by gas BG flows in the outlet portion 40, the oil OL contained in the blow-by gas BG may stay in the horizontal plane.

When the oil OL stays in the outlet portion 40, the internal pressures of the internal spaces 720 and 721 of the outlet portion 40 are relatively high. Therefore, even if the seal member 745 is provided, the stayed oil OL stays in the mating surface 730 of the outlet mounting portion 700. There is a risk of seeping out of the engine 1 through the gap between the container body 750 and the mating surface 770 of the container body 750. Alternatively, when the oil OL stays at the outlet portion 40, the stayed oil OL may be mixed with the water vapor contained in the blow-by gas BG to form an emulsion. When an emulsion is generated, the path of blow-by gas BG may be blocked. If the path of the blow-by gas BG is blocked, the internal pressure of the engine 1 rises, and there is a risk that parts such as the oil gauge guide provided in the crankcase 6 will be damaged. Further, if the path of the blow-by gas BG is blocked, the internal pressure of the engine 1 rises, and the turbocharger 60 may suck the oil OL. As described above, when the oil OL contained in the blow-by gas BG stays in the outlet portion 40, problems such as the oil OL oozing out to the outside of the engine 1 and the path of the blow-by gas BG being blocked occur.

On the other hand, the outlet mounting portion 700 of the blow-by gas treatment device 100 according to the present embodiment has an oil guide inclined surface 740. As described above, the oil guide inclined surface 740 is inclined downward from the mating surface 730 toward the through hole 680. Therefore, even when the oil OL contained in the blow-by gas BG is guided to the outlet portion 40, that is, when the oil OL remains in the gas G separated from the blow-by gas BG by the separation portion 330. However, the oil OL flows through the oil guide inclined surface 740 and is guided into the head cover 4. As a result, it is possible to prevent the oil OL contained in the blow-by gas BG from staying at the outlet portion 40.

The oil OL guided from the outlet portion 40 into the head cover 4 by the oil guide inclined surface 740 flows through the guide wall portion 203 and is guided to at least one of the first oil guide groove portion 151 and the second oil guide groove portion 152. At this time, when the guide wall portion 203 is inclined downward toward the first oil guide groove portion 151 and the second oil guide groove portion 152, the oil OL is transferred from the guide wall portion 203 to the first oil guide groove portions 151 and the second. It is smoothly guided by at least one of the oil guide grooves 152. The oil OL guided to the first oil guide groove portion 151 is guided forward as shown in the X1 direction shown in FIG. 2 and guided to the first oil drain 161 on the front side. Further, the oil OL guided to the second oil guide groove portion 152 is guided to the rear shown in the X2 direction shown in FIG. 2 and guided to the second oil drain 162 on the rear side.

On the other hand, the oil OL separated from the blow-by gas BG by the separation portion 330 is discharged from the filter 130 when the engine 1 is tilted to the front side, and is guided forward by the first oil guide groove portion 151 in the X1 direction. It is guided to the first oil drain 161 on the front side. Similarly, the oil OL separated from the blow-by gas BG by the separation portion 330 is discharged from the filter 130 when the engine 1 is tilted to the rear side, and is discharged to the rear indicated by the second oil guide groove portion 152 in the X2 direction. It is guided to the second oil drain 162 on the rear side.

The oil OL guided to the first oil drain 161 by the first oil guide groove portion 151 is temporarily stored in the first oil drain 161 and then in the engine 1 through a check valve provided in the first oil drain 161. Is discharged to. Similarly, the oil OL guided to the second oil drain 162 by the second oil guide groove portion 152 is temporarily stored in the second oil drain 162 and then a check valve provided in the second oil drain 162. It is discharged into the engine 1 through. The oil OL discharged from the first oil drain 161 and the second oil drain 162 is collected in the oil pan 7 from the inside of the head cover 4, for example, through the oil return path 99.

According to the blow-by gas processing apparatus 100 and the engine 1 according to the present embodiment, the outlet portion 40 is an oil for guiding the oil OL remaining in the gas G after being separated from the blow-by gas BG into the head cover 4. It has an oil guide inclined surface 740 as a guide surface. As a result, the blow-by gas processing apparatus 100 according to the present embodiment is included in the blow-by gas BG even when the oil OL remains in the gas G after being separated from the blow-by gas BG by the separation unit 330. It is possible to prevent the oil OL from staying at the outlet portion 40.

Further, the oil guide inclined surface 740 is inclined downward from the mating surface 730 toward the through hole 680. Therefore, the oil OL remaining in the gas G after being separated from the blow-by gas BG by the separating portion 330 flows downward through the oil guide inclined surface 740 toward the through hole 680, passes through the through hole 680, and passes through the head cover. You will be guided more reliably by Tokuuchi. As a result, the blow-by gas processing apparatus 100 according to the present embodiment can more reliably suppress the oil OL contained in the blow-by gas BG from staying at the outlet portion 40.

Further, the oil guide inclined surface 740 is formed in the entire region extending from the mating surface 730 to the inner peripheral surface 681 of the through hole 680. Therefore, the oil OL remaining in the gas G after being separated from the blow-by gas BG by the separation portion 330 can be prevented from being caught or staying at at least a part of the outlet portion 40, and the oil guide inclined surface 740 can be prevented from being caught or retained. Flows smoothly downward toward the through hole 680. Then, the oil OL that has flowed through the oil guide inclined surface 740 toward the through hole 680 passes through the through hole 680 and is reliably guided by the inside of the head cover 4. As a result, the blow-by gas processing apparatus 100 according to the present embodiment can more reliably suppress the oil OL contained in the blow-by gas BG from staying at the outlet portion 40.

Further, since the oil guide inclined surface 740 exhibits a part of the surface of the cone (cone in the present embodiment), the oil OL remaining in the gas G after being separated from the blow-by gas BG by the separation portion 330 is present. , The oil guide inclined surface 740 can smoothly flow downward toward the through hole 680.

Further, the oil OL guided from the outlet portion 40 into the head cover 4 by the oil guide inclined surface 740 flows through the guide wall portion 203 and is guided to at least one of the first oil guide groove portion 151 and the second oil guide groove portion 152. .. The first oil guide groove portion 151 guides the oil OL separated from the blow-by gas BG by the separation portion 330 to the first oil drain 161 and guides the oil from the outlet portion 40 into the head cover 4 by the oil guide inclined surface 740. The OL can be guided to the first oil drain 161. Further, the second oil guide groove portion 152 guides the oil OL separated from the blow-by gas BG by the separation portion 330 to the second oil drain 162, and is guided from the outlet portion 40 into the head cover 4 by the oil guide inclined surface 740. The oil OL can be guided to the second oil drain 162. As a result, the oil OL separated from the blow-by gas BG is collected in, for example, an oil pan 7 or an oil container provided in the engine 1 and can be suppressed from being discharged from the outlet portion 40.

Further, according to the engine 1 including the blow-by gas treatment device 100 and the blow-by gas treatment device 100 according to the present embodiment, the oil OL separated from the blow-by gas BG by the separation unit 330 is the engine 1 by the first oil guide groove portion 151. It is guided to the front side of the engine, temporarily stored in the first oil drain 161 and then discharged into the engine 1. Further, the oil OL separated from the blow-by gas BG by the separation unit 330 is guided to the rear side of the engine 1 by the second oil guide groove portion 152, temporarily stored in the second oil drain 162, and then in the engine 1. Is discharged to. Therefore, in the blow-by gas treatment apparatus 100 according to the present embodiment, the discharge route of the oil OL separated from the blow-by gas BG by the separation unit 330 is clear. Further, the gas G after the oil OL is separated from the blow-by gas BG is guided to the outlet portion 40 of the blow-by gas processing device 100 by the main structural portion 101. Then, the outlet portion 40 of the blow-by gas processing device 100 supplies the gas G guided by the main structural portion 101 to the intake system of the engine 1. As described above, in the blow-by gas treatment apparatus 100 according to the present embodiment, the discharge path of the oil OL separated from the blow-by gas BG by the separation unit 330 and the discharge path of the gas G separated from the blow-by gas BG by the separation unit 330. And are clearly distinguished. As a result, even if the engine 1 is tilted in the front-rear direction, it is possible to prevent the oil OL separated from the blow-by gas BG from being discharged from the outlet portion 40. Further, since the oil OL mist can be suppressed from flowing to the intake system, the oil OL mist can be suppressed from burning, and the exhaust gas can be purified.

Further, the separation unit 330 that separates the blow-by gas BG into the oil OL and the gas G temporarily stores the oil OL guided by the first oil guide groove portion 151 and discharges the oil OL into the engine 1 first oil drain 161. And the second oil drain 162 that temporarily stores the oil OL guided by the second oil guide groove portion 152 and discharges it into the engine 1, and is provided in the central portion, that is, at the central position RP. As described above, the separating portion 330 is provided at a position relatively far from the first oil drain 161 and the second oil drain 162. Therefore, even if the engine 1 is tilted in the front-rear direction, it exists above the oil OL temporarily stored in the first oil drain 161 and the second oil drain 162, and above the first oil drain 161 and the second oil drain 162. It is possible to prevent the oil OL and the mist of the oil OL from being caught in or remixed with the gas G separated from the blow-by gas BG by the separation unit 330. As a result, even if the engine 1 is tilted in the front-rear direction, it is possible to further suppress the oil OL separated from the blow-by gas BG from being discharged from the outlet portion 40.

Further, since it is possible to prevent the oil OL and the mist of the oil OL from being caught in or remixed with the gas G separated from the blow-by gas BG by the separation portion 330, the position of the outlet portion 40 does not matter. It is possible to suppress the oil OL separated from the blow-by gas BG from being released from the outlet portion 40. This makes it possible to increase the degree of freedom in selecting the installation position and installation direction of the outlet portion 40.

The first oil guide groove portion 151 and the second oil guide groove portion 152 have a groove shape, and although they have a simple structure, they are separated from the blow-by gas BG by the separation portion 330 even if the engine 1 is tilted in the front-rear direction. The oil OL can be reliably guided to the front side and the rear side of the engine 1.

Further, according to the blow-by gas processing apparatus 100 according to the present embodiment, the first blow-by gas intake unit 111 and the second blow-by gas intake unit 112 for taking in the blow-by gas BG, the first oil guide groove portion 151 for guiding the oil OL, and the first oil guide groove portion 151 The second oil guide groove portion 152 and the second oil guide groove portion 152 are provided separately at positions on both sides of the upper surface side and the lower surface side via a common partition wall portion 200. Therefore, the first blow-by gas intake portion 111 and the second blow-by gas intake portion 112, and the first oil guide groove portion 151 and the second oil guide groove portion 152 can be provided on the partition wall portion 200 as one member. Therefore, the vertical dimension V (see FIG. 2) of the blow-by gas processing apparatus 100 can be suppressed. Therefore, the height dimension of the head cover 4 in which the blow-by gas treatment device 100 is arranged can be suppressed, and the height dimension of the engine 1 provided with the blow-by gas treatment device 100 in the head cover 4 can be suppressed.

Further, the blow-by gas BG passes through the filter 130 and collides with the collision plate 133 after increasing the flow velocity by the impactor 120. Therefore, the blow-by gas BG is surely separated by the oil OL and the gas G excluding the mist of the oil OL. Further, the impactor 120 increases the flow velocity of the blow-by gas BG along the vertical direction (vertical direction) at the central position RP in the front-rear direction of the engine 1. Further, the collision plate 133 extends in the horizontal direction and collides with the blow-by gas BG that has passed through the filter 130. Therefore, the vertical dimension V of the blow-by gas processing device 100 is suppressed as compared with the case where the impactor increases the flow velocity of the blow-by gas along the horizontal direction and causes the blow-by gas to collide with the collision plate extending in the vertical direction. Can be done.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of claims. The configuration of the above embodiment may be partially omitted or may be arbitrarily combined so as to be different from the above.

For example, as an example of the engine of the present invention, the engine 1 according to the present embodiment is illustrated. The engine 1 is a supercharged diesel engine with a turbocharger. However, the present invention is not limited to this, and the engine of the present invention may be a naturally aspirated diesel engine, a supercharged gasoline engine with a turbocharger, a naturally aspirated gasoline engine, or the like. The type of the engine 1 shown in the figure is, for example, a multi-cylinder engine such as a supercharged high-output 3-cylinder engine or a 4-cylinder engine equipped with a turbocharger. However, the type of engine 1 is not limited to this. The engine 1 can be mounted on a type of vehicle other than a vehicle such as a construction machine, an agricultural machine, or a lawn mower. Further, in the description of the present embodiment, the first oil guide groove portion 151 is exemplified as the first oil guide portion, and the second oil guide groove portion 152 is exemplified as the second oil guide portion. However, the first oil guide unit and the second oil guide unit are not limited to this, and may be, for example, a pipe-shaped member.

1: Engine, 2: Cylinder block, 3: Cylinder head, 4: Head cover, 4A: Top surface, 4B: Front surface, 4C: Rear surface, 4D: Left and right surface, 4P: Lower area, 4Q: Upper area, 4R: Upper area, 5: Cylinder, 6: Crankcase, 7: Oil pan, 8: Piston, 9: Crank shaft, 10: Conrod, 11: Valve cam chamber, 12: Valve cam shaft, 13: Tappet, 14: Tappet guide hole, 15: push rod, 16: insertion hole, 17: rocker arm, 18: spring, 19: intake valve, 20: exhaust valve, 21: oil outflow hole, 22: oil drop hole, 30: intake passage, 31: Exhaust passage, 40: Outlet, 41: Pipe, 50: Intake pipe, 50T: Connection pipe, 52: Air cleaner, 60: Turbo charger, 61: Blower, 62: Turbine, 70: Blow-by gas mixing joint, 71: Main pipe, 72: Sub pipe, 99: Oil return path, 100: Blow-by gas treatment device, 101: Main structure part, 111: First blow-by gas intake part, 112: Second blow-by gas intake part, 120: Impactor, 121 : Blow-by hole, 130: Filter, 133: Collision plate, 135: Passage, 151: 1st oil guide groove, 152: 2nd oil guide groove, 161: 1st oil drain, 162: 2nd oil drain, 200: Partition Wall part, 203: Guide wall part, 231: 1st guide lower surface part, 232: 2nd guide lower surface part, 295: Guide plate, 330: Separation part, 350: Pressure regulating valve, 680: Through hole, 681: Inner peripheral surface , 700: Outlet mounting part, 702: Top surface, 720, 721: Internal space, 730: Laminating surface, 740: Oil guide inclined surface, 741: Upper end part, 742: Lower end part, 745: Seal member, 750: Container body, 751: Screw, 770: Fitting surface, AR: Intake, B: Intake air, BG: Blow-by gas, C: Intake air, G: Gas, OL: Oil, RP: Central position

Claims (5)

A blow-by gas processing device that processes blow-by gas generated in an engine .
A separation unit for separating the pre-Symbol blow-by gas in the oil and gas,
Provided on the upper portion of the head cover of the engine, an outlet mounting portion having a through hole for passing the gas separated from the by Ri before Symbol blow-by gas in the separation unit,
A container body attached to the outlet mounting portion, temporarily accommodating the gas passing through the through hole, and supplying the gas to the intake system of the engine.
Equipped with
It said outlet mounting portion, the outlet attachment portion and from said mating surface of the container body toward said the through hole is inclined downwardly of the head cover of the oil remaining in the prior SL gas separated from the blow-by gas blow-by gas processing apparatus characterized by having an oil guide inclined surface for guiding the inner portion. The blow-by gas treatment apparatus according to claim 1 , wherein the oil guide inclined surface is formed over the entire region extending from the mating surface to the inner surface of the through hole. The blow-by gas treatment apparatus according to claim 1 or 2 , wherein the oil guide inclined surface exhibits a part of the surface of a cone. Provided on the inner portion of the head cover, and a guide wall portion for guiding the front SL gas separated from the blow-by gas to the outlet mounting portion,
An oil guide unit provided inside the head cover and guiding the oil separated from the blow-by gas toward the inside of the engine.
Further prepare
The oil guided to the inner portion of the head cover from the container body by the oil guide inclined surfaces, any one of the claims 1-3, characterized in that it is guided to the guide wall flow the oil guide portion The blow-by gas treatment apparatus according to the section. An engine equipped with a blow-by gas processing device that processes blow-by gas generated in the engine.
The blow-by gas processing device,
A separation unit for separating the pre-Symbol blow-by gas in the oil and gas,
Provided on the upper portion of the head cover of the engine, an outlet mounting portion having a through hole for passing the gas separated from the by Ri before Symbol blow-by gas in the separation unit,
A container body attached to the outlet mounting portion, temporarily accommodating the gas passing through the through hole, and supplying the gas to the intake system of the engine.
Have,
It said outlet mounting portion, the outlet attachment portion and from said mating surface of the container body toward said the through hole is inclined downwardly of the head cover of the oil remaining in the prior SL gas separated from the blow-by gas engine and having an oil guide inclined surface for guiding the inner portion.

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