CA2949792A1 - Crankcase evacuation device - Google Patents
Crankcase evacuation device Download PDFInfo
- Publication number
- CA2949792A1 CA2949792A1 CA2949792A CA2949792A CA2949792A1 CA 2949792 A1 CA2949792 A1 CA 2949792A1 CA 2949792 A CA2949792 A CA 2949792A CA 2949792 A CA2949792 A CA 2949792A CA 2949792 A1 CA2949792 A1 CA 2949792A1
- Authority
- CA
- Canada
- Prior art keywords
- crankcase
- passageway
- gas
- stepped region
- evacuation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention provides a crankcase evacuation device for insertion in an exhaust passageway in a vented crankcase of an internal combustion engine. The device feeds an external source of gas into the exhaust passageway of the crankcase, thereby creating a vacuum in the crankcase exhaust passageway during operation of the engine, which helps vent gas from the crankcase through the exhaust passageway.
Description
CRANKCASE EVACUATION DEVICE
Field of Invention This invention relates to the evacuation of blow-by gas from the crankcase of an internal combustion engine, and more particularly to a device for evacuation of the blow-by gas from the internal combustion engine.
Background to the Invention A fuel and air mixture is fed into each of the one or more combustion cylinders of an internal combustion engine, compressed by a piston and ignited. The ignition of the compressed fuel and air mixture causes a controlled explosion within the combustion chamber which drives the piston within the combustion chamber in a direction opposite to the direction of compression, towards a crankshaft housed in a crankcase below the bottom end of the combustion cylinder. Gas created by the controlled explosion (combustion gas) is exhausted from the top end of the combustion cylinder, and the cycle is then repeated continuously while the engine is running.
While most of the combustion gas is exhausted from the top end of the combustion cylinder, a small portion of the combustion gas leaks past the piston in the cylinder and passes into the crankcase below the bottom end of the combustion cylinder. This leaked gas is known in the art as blow-by gas. Oil, contained within the crankcase, lubricates the crankshaft and other moving parts of the engine as the engine is running. Blow-by gas can build up in the crankcase, if the crankcase is closed. The pressure of the built up blow-by gas can hasten the deterioration of the oil in the crankcase over time, and eventually the pressurized blow-by gas will pass out of the crankcase through gaskets and seals in the engine, together with some of the oil, thereby creating a mess on the exterior surfaces of the engine.
To avoid this mess, modern internal combustion engines are vented, allowing exhaustion of blow-by gases from the crankcase in an orderly manner. One way of venting the crankcase is by feeding air from the engine's air cleaner to the crankcase through a duct called a breather, The air fed through the crankcase is exhausted from the crankcase (together with any built-up blow-by gas) through a device called a PCV valve (positive crankcase ventilation valve). The PCV
valve is held open by a vacuum line which returns the blow-by gas, together with air vented through the crankcase by the breather, to the engine's intake manifold so it can be mixed with fuel to form the air-fuel mixture which is fed into the combustion cylinders of the engine.
However, in a system utilizing the PCV valve, suction created using a manifold vacuum in the traditional manner deteriorates as engine throttle is opened and the engine speed is increased. In other words, as more pressure builds within the crankcase (as engine speed increases), the less vacuum is available, making the system using the PCV valve work best when the engine is at idle speed or slightly off. Additionally, blow-by gas is returned to the intake manifold, which contaminates the air-fuel mixture. And, of course, because the vacuum line holds the PCV valve open as the engine is running, there are moving parts in the PCV valve that are under stress and, consequently, that are subject to deterioration.
The crankcase evacuation device of the present invention, described herein, may be used as an alternative to the PCV valve.
Sti ni mar.' of the Invention According to one aspect of the present invention, there is provided a crankcase evacuation device comprising: a sleeve inserted in an interior surface of a passageway exhausting blow-by gas from a crankcase of an internal combustion engine, wherein the sleeve comprises: a body extending through a portion of the passageway, wherein the body defines a channel running axially along the length of the body from a first end of the body, proximal to the crankcase, to a second end of the body, distal to the crankcase, and wherein there is an annular lip at each of the first and second ends of the body joining each of the first and second ends of the body to a corresponding first and second annular surface of the interior of the passageway; and wherein the channel comprises two stepped regions comprising a first stepped region running from the lip at the end of the body proximal to the crankcase and a second stepped region running from the lip at the end of the body distal to the crankcase, wherein the first stepped region is more narrow that the second stepped region and wherein there is an annular joint between the first stepped region and the second stepped region, wherein the thickness ofthe annular joint in a plane cross-sectional to the length of the channel is the difference in narrowness of the first stepped region and the second stepped region, and wherein there are a plurality of holes in the annular joint, and a gas intake fitting attached to an external surface of the passageway wherein the fitting supplies a
Field of Invention This invention relates to the evacuation of blow-by gas from the crankcase of an internal combustion engine, and more particularly to a device for evacuation of the blow-by gas from the internal combustion engine.
Background to the Invention A fuel and air mixture is fed into each of the one or more combustion cylinders of an internal combustion engine, compressed by a piston and ignited. The ignition of the compressed fuel and air mixture causes a controlled explosion within the combustion chamber which drives the piston within the combustion chamber in a direction opposite to the direction of compression, towards a crankshaft housed in a crankcase below the bottom end of the combustion cylinder. Gas created by the controlled explosion (combustion gas) is exhausted from the top end of the combustion cylinder, and the cycle is then repeated continuously while the engine is running.
While most of the combustion gas is exhausted from the top end of the combustion cylinder, a small portion of the combustion gas leaks past the piston in the cylinder and passes into the crankcase below the bottom end of the combustion cylinder. This leaked gas is known in the art as blow-by gas. Oil, contained within the crankcase, lubricates the crankshaft and other moving parts of the engine as the engine is running. Blow-by gas can build up in the crankcase, if the crankcase is closed. The pressure of the built up blow-by gas can hasten the deterioration of the oil in the crankcase over time, and eventually the pressurized blow-by gas will pass out of the crankcase through gaskets and seals in the engine, together with some of the oil, thereby creating a mess on the exterior surfaces of the engine.
To avoid this mess, modern internal combustion engines are vented, allowing exhaustion of blow-by gases from the crankcase in an orderly manner. One way of venting the crankcase is by feeding air from the engine's air cleaner to the crankcase through a duct called a breather, The air fed through the crankcase is exhausted from the crankcase (together with any built-up blow-by gas) through a device called a PCV valve (positive crankcase ventilation valve). The PCV
valve is held open by a vacuum line which returns the blow-by gas, together with air vented through the crankcase by the breather, to the engine's intake manifold so it can be mixed with fuel to form the air-fuel mixture which is fed into the combustion cylinders of the engine.
However, in a system utilizing the PCV valve, suction created using a manifold vacuum in the traditional manner deteriorates as engine throttle is opened and the engine speed is increased. In other words, as more pressure builds within the crankcase (as engine speed increases), the less vacuum is available, making the system using the PCV valve work best when the engine is at idle speed or slightly off. Additionally, blow-by gas is returned to the intake manifold, which contaminates the air-fuel mixture. And, of course, because the vacuum line holds the PCV valve open as the engine is running, there are moving parts in the PCV valve that are under stress and, consequently, that are subject to deterioration.
The crankcase evacuation device of the present invention, described herein, may be used as an alternative to the PCV valve.
Sti ni mar.' of the Invention According to one aspect of the present invention, there is provided a crankcase evacuation device comprising: a sleeve inserted in an interior surface of a passageway exhausting blow-by gas from a crankcase of an internal combustion engine, wherein the sleeve comprises: a body extending through a portion of the passageway, wherein the body defines a channel running axially along the length of the body from a first end of the body, proximal to the crankcase, to a second end of the body, distal to the crankcase, and wherein there is an annular lip at each of the first and second ends of the body joining each of the first and second ends of the body to a corresponding first and second annular surface of the interior of the passageway; and wherein the channel comprises two stepped regions comprising a first stepped region running from the lip at the end of the body proximal to the crankcase and a second stepped region running from the lip at the end of the body distal to the crankcase, wherein the first stepped region is more narrow that the second stepped region and wherein there is an annular joint between the first stepped region and the second stepped region, wherein the thickness ofthe annular joint in a plane cross-sectional to the length of the channel is the difference in narrowness of the first stepped region and the second stepped region, and wherein there are a plurality of holes in the annular joint, and a gas intake fitting attached to an external surface of the passageway wherein the fitting supplies a
2 stream of gas through a hole in the passageway to a space within the passageway defined between the annular lips at each of the first and second ends of the body.
According to another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the sleeve and passageway are cylindrical.
According to yet another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the plurality of holes in the annular joint are spaced at equidistant intervals.
According to still another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the plurality of holes is six holes.
According to a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the stream of gas comes from exhaust gas of combustion chambers of the internal combustion engine being expelled from the engine, exhaust gas of the combustion chambers of the internal combustion chambers being fed from a turbocharger, or gas being fed to the internal combustion engine from a supercharger.
According to yet a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the sleeve is made of aluminum.
According to still a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the aluminum is T6 aluminum.
According to another aspect of the present invention, there is provided a crankcase evacuation =
device as described herein, wherein each of the plurality of holes in the annular joint is at an angle of nine degrees (90) to the second stepped region of the channel.
Brief Description of the Drawings Figure IA is a side elevational view of the sleeve portion of the crankcase evacuation device of the present invention.
Figure IB is a perspective view, viewed from below, of the sleeve portion illustrated in Figure 1A.
According to another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the sleeve and passageway are cylindrical.
According to yet another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the plurality of holes in the annular joint are spaced at equidistant intervals.
According to still another aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the plurality of holes is six holes.
According to a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the stream of gas comes from exhaust gas of combustion chambers of the internal combustion engine being expelled from the engine, exhaust gas of the combustion chambers of the internal combustion chambers being fed from a turbocharger, or gas being fed to the internal combustion engine from a supercharger.
According to yet a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the sleeve is made of aluminum.
According to still a further aspect of the present invention, there is provided a crankcase evacuation device as described herein, wherein the aluminum is T6 aluminum.
According to another aspect of the present invention, there is provided a crankcase evacuation =
device as described herein, wherein each of the plurality of holes in the annular joint is at an angle of nine degrees (90) to the second stepped region of the channel.
Brief Description of the Drawings Figure IA is a side elevational view of the sleeve portion of the crankcase evacuation device of the present invention.
Figure IB is a perspective view, viewed from below, of the sleeve portion illustrated in Figure 1A.
3 Figure 2A is a bottom plan view of the annular joint between the first stepped region and the second stepped region of the sleeve portion illustrated in Figure 1A.
Figure 2B is a side elevational view, shown in cross section, of a portion of the sleeve portion illustrated in Figure IA.
Figure 2C is a side elevational view, shown in cross section, of a portion of the sleeve portion illustrated in Figure 1B.
Figure 3 is a side elevational view, shown in cross section, of the crankcase evacuation device of the present invention.
Detailed Description of the Invention Figure 3 shows a crankcase evacuation device 1 of the present invention installed in a passageway 10 exhausting blow-by gas from a crankcase of an internal combustion engine (not shown) which would be found below the bottom end 12 of passageway 10.
Device 1 comprises sleeve 20 inserted in passageway 10, and a gas intake fitting 50, attached to a portion of an external surface of the passageway 10 somewhere between annular lips 32, 34 found at opposite ends of the sleeve 20, respectively. In the embodiment shown in Figure 3, sleeve 20 and passageway 10 are cylindrical tubes with circular cross-sectional profiles.
However, the skilled person would understand that tubes with non-circular cross-sectional profiles could also be used, such as oval-shaped or rectangular-shaped cross-sectional profiles.
As shown in isolation in Figure 1A, sleeve 20 comprises a body 26 which defines a channel 28 running axially along the length of the body 26 from a first end 22 of the body 26, proximal to the crankcase (not shown) to a second end 24 of the body 26, distal to the crankcase (not shown).
There is an annular lip 32, 34 at each of the first and second ends 22, 24 of the body 26, respectively.
As shown in Figure 3, each of annular lips 32, 34 joins to a corresponding first and second annular surface of passageway 10 at joints 42 and 44, respectively, which seal off a section 16 or passageway 10 between annular lips 32 and 34. Gas intake fitting 50 attaches to a portion of an
Figure 2B is a side elevational view, shown in cross section, of a portion of the sleeve portion illustrated in Figure IA.
Figure 2C is a side elevational view, shown in cross section, of a portion of the sleeve portion illustrated in Figure 1B.
Figure 3 is a side elevational view, shown in cross section, of the crankcase evacuation device of the present invention.
Detailed Description of the Invention Figure 3 shows a crankcase evacuation device 1 of the present invention installed in a passageway 10 exhausting blow-by gas from a crankcase of an internal combustion engine (not shown) which would be found below the bottom end 12 of passageway 10.
Device 1 comprises sleeve 20 inserted in passageway 10, and a gas intake fitting 50, attached to a portion of an external surface of the passageway 10 somewhere between annular lips 32, 34 found at opposite ends of the sleeve 20, respectively. In the embodiment shown in Figure 3, sleeve 20 and passageway 10 are cylindrical tubes with circular cross-sectional profiles.
However, the skilled person would understand that tubes with non-circular cross-sectional profiles could also be used, such as oval-shaped or rectangular-shaped cross-sectional profiles.
As shown in isolation in Figure 1A, sleeve 20 comprises a body 26 which defines a channel 28 running axially along the length of the body 26 from a first end 22 of the body 26, proximal to the crankcase (not shown) to a second end 24 of the body 26, distal to the crankcase (not shown).
There is an annular lip 32, 34 at each of the first and second ends 22, 24 of the body 26, respectively.
As shown in Figure 3, each of annular lips 32, 34 joins to a corresponding first and second annular surface of passageway 10 at joints 42 and 44, respectively, which seal off a section 16 or passageway 10 between annular lips 32 and 34. Gas intake fitting 50 attaches to a portion of an
4 external surface of passageway 10 and feeds gas into the sealed-off section 16 of passageway 10 between annular lips 32 and 34.
Body 26 comprises two stepped regions 126, 226 which correspondingly define two stepped regions 128, 228 of channel 28. Stepped regions 126 and 128 of body 26 and channel 28, respectively, have a more narrow diameter than the diameters of stepped regions 226 and 228 of body 26 and channel 28, respectively. There is an annular joint 60 between the more narrow first stepped region 126 of body 26 and the less narrow second stepped region 226 of body 26. The thickness of the annular joint 60 in a plane cross-sectional to the length of channel 28 is the difference in the narrowness of the first stepped region 126 and the second stepped region 226 of body 26.
The annular joint 60 has a plurality olholes 80 extending there-through. Each of the plurality of holes 80 extends from the interior of the second stepped region 228 of the channel 28 to a space between the first stepped region 126 of body 26 and the sealed-off region 16 of passageway 10 between annular lips 32 and 34. In one embodiment, the holes 80 in the plurality of holes 80 are spaced at equidistant intervals in annular joint 60. In a further embodiment, shown in Figure 2A, there are six holes 80 in annular joint 60, each of which is spaced at an equidistant interval. The location of two of these holes 80, on opposite sides of the body 26, arc shown in Figure 2B. One of these holes 80 is isolated in a circle drawn in broken lines 62 shown on the left-hand side of Figure 2B and represents the cross-sectional view taken along line Y-Y in Figure 2A. Circled region 62 is shown in expanded view in Figure 2C, and in the embodiment shown in Figure 2C, hole 80 of diameter 6 is bored out at an angle 0 to the longitudinal wall of channel 28, thereby making a hole angled in towards the center of channel 28.
To give an idea of the relative proportions of the components of the device 1, in one embodiment, the internal diameter of passageway 10 is 1.125 inches, which matches the diameter each of annular lips 32 and 34, found at opposite ends of the body 26 of sleeve 20. The total length of the body 26 is 1.00 inch, with each of annular lips having a length of 0.125 inch, so that the sleeve 20 has a total length of 1.250 inches. The first stepped region 126 of body 26 has a length of 0.275 inch and an external dimeter of 0.900 inch. The second stepped region 226 of body 26 has a length of 0.725 inch and an external diameter of 1.00 inch.
The difference in the diameters of the first stepped region 126 and the second stepped region 226 means that the width of annular joint 60 is 0.100 inch. The diameter of each of the plurality of holes in annular joint 60 is 0.0625 inch, and angle 0 is 9 degrees.
In one embodiment, sleeve 20 is made out of aluminum, for example T6 aluminum.
In operation, when venting a crankcase (not shown) with an air intake (not shown), air is exhausted (together with blow-by gas) through passageway 10. Passageway 10 is fitted with crankcase evacuation device 1 such that exhaust leaving the crankcase is free to flow through = passageway 10 and device 1, as illustrated by the white arrows in Figure 3.
In order to draw exhaust leaving the crankcase through passageway 10, a vacuum is created in crankcase evacuation device 1 in the following manner. Gas is fed through a line (not shown) leading to gas intake fitting 50. The gas may be fed from a source that is able to provide gas during the operation of the internal combustion engine, such as the exhaust manifold, or the turbocharger or supercharger (in engines fitted with a turbocharger or supercharger, respectively). The gas is fed through gas intake fitting 50 into sealed-off section 16 of passageway 10 between the two annular lips 32 and 34. The only outlet of sealed-off section 16 is the plurality of holes 80 in the annular joint 60. In an embodiment previously described, the diameter of each of the plurality of holes is 0.0625 inch. If the diameter of the gas intake fitting 50 is larger than that of the holes 80, for example 0.25 inch, gas will be fed into sealed-off section 16 and will be forced into the second stepped region 228 of channel 28 under pressure, as illustrated by the black arrows in Figure 3. The pressurized gas entering the second stepped region 228 of channel 28 will create a vacuum in the first stepped region 128 of channel 28, which will in turn draw the exhaust gas from the crankcase through proximal end 12 of passageway 10 to the distal end 14 of passageway 10. From the distal end 14 of passageway 10, exhausted gas may be fed through to an exhaust system (not shown) comprising components such as a catalytic converter (not shown) to capture impurities and, ultimately, expelled.
Body 26 comprises two stepped regions 126, 226 which correspondingly define two stepped regions 128, 228 of channel 28. Stepped regions 126 and 128 of body 26 and channel 28, respectively, have a more narrow diameter than the diameters of stepped regions 226 and 228 of body 26 and channel 28, respectively. There is an annular joint 60 between the more narrow first stepped region 126 of body 26 and the less narrow second stepped region 226 of body 26. The thickness of the annular joint 60 in a plane cross-sectional to the length of channel 28 is the difference in the narrowness of the first stepped region 126 and the second stepped region 226 of body 26.
The annular joint 60 has a plurality olholes 80 extending there-through. Each of the plurality of holes 80 extends from the interior of the second stepped region 228 of the channel 28 to a space between the first stepped region 126 of body 26 and the sealed-off region 16 of passageway 10 between annular lips 32 and 34. In one embodiment, the holes 80 in the plurality of holes 80 are spaced at equidistant intervals in annular joint 60. In a further embodiment, shown in Figure 2A, there are six holes 80 in annular joint 60, each of which is spaced at an equidistant interval. The location of two of these holes 80, on opposite sides of the body 26, arc shown in Figure 2B. One of these holes 80 is isolated in a circle drawn in broken lines 62 shown on the left-hand side of Figure 2B and represents the cross-sectional view taken along line Y-Y in Figure 2A. Circled region 62 is shown in expanded view in Figure 2C, and in the embodiment shown in Figure 2C, hole 80 of diameter 6 is bored out at an angle 0 to the longitudinal wall of channel 28, thereby making a hole angled in towards the center of channel 28.
To give an idea of the relative proportions of the components of the device 1, in one embodiment, the internal diameter of passageway 10 is 1.125 inches, which matches the diameter each of annular lips 32 and 34, found at opposite ends of the body 26 of sleeve 20. The total length of the body 26 is 1.00 inch, with each of annular lips having a length of 0.125 inch, so that the sleeve 20 has a total length of 1.250 inches. The first stepped region 126 of body 26 has a length of 0.275 inch and an external dimeter of 0.900 inch. The second stepped region 226 of body 26 has a length of 0.725 inch and an external diameter of 1.00 inch.
The difference in the diameters of the first stepped region 126 and the second stepped region 226 means that the width of annular joint 60 is 0.100 inch. The diameter of each of the plurality of holes in annular joint 60 is 0.0625 inch, and angle 0 is 9 degrees.
In one embodiment, sleeve 20 is made out of aluminum, for example T6 aluminum.
In operation, when venting a crankcase (not shown) with an air intake (not shown), air is exhausted (together with blow-by gas) through passageway 10. Passageway 10 is fitted with crankcase evacuation device 1 such that exhaust leaving the crankcase is free to flow through = passageway 10 and device 1, as illustrated by the white arrows in Figure 3.
In order to draw exhaust leaving the crankcase through passageway 10, a vacuum is created in crankcase evacuation device 1 in the following manner. Gas is fed through a line (not shown) leading to gas intake fitting 50. The gas may be fed from a source that is able to provide gas during the operation of the internal combustion engine, such as the exhaust manifold, or the turbocharger or supercharger (in engines fitted with a turbocharger or supercharger, respectively). The gas is fed through gas intake fitting 50 into sealed-off section 16 of passageway 10 between the two annular lips 32 and 34. The only outlet of sealed-off section 16 is the plurality of holes 80 in the annular joint 60. In an embodiment previously described, the diameter of each of the plurality of holes is 0.0625 inch. If the diameter of the gas intake fitting 50 is larger than that of the holes 80, for example 0.25 inch, gas will be fed into sealed-off section 16 and will be forced into the second stepped region 228 of channel 28 under pressure, as illustrated by the black arrows in Figure 3. The pressurized gas entering the second stepped region 228 of channel 28 will create a vacuum in the first stepped region 128 of channel 28, which will in turn draw the exhaust gas from the crankcase through proximal end 12 of passageway 10 to the distal end 14 of passageway 10. From the distal end 14 of passageway 10, exhausted gas may be fed through to an exhaust system (not shown) comprising components such as a catalytic converter (not shown) to capture impurities and, ultimately, expelled.
Claims (8)
- CLAIMS:
I. A crankcase evacuation device comprising:
a sleeve inserted in an interior surface of a passageway exhausting blow-by gas from a crankcase of an intemal combustion engine, wherein the sleeve comprises: a body extending through a portion of the passageway, wherein the body defines a channel running axially along the length of the body from a first end of the body, proximal to the crankcase, to a second end of the body, distal to the crankcase, and wherein there is an annular lip at each of the first and second ends of the body joining each of the first and second ends of the body to a corresponding first and second annular surface of the interior of the passageway; and wherein the channel comprises two stepped regions comprising a first stepped region running from the lip at the end of the body proximal to the crankcase and a second stepped region running from the lip at the end of the body distal to the crankcase, wherein the first stepped region is more narrow that the second stepped region and wherein there is an annular joint between the first stepped region and the second stepped region, wherein the thickness of the annular joint in a plane cross-sectional to the length of the channel is the difference in narrowness of the first stepped region and the second stepped region, and wherein there are a plurality of holes in the annular joint, and a gas intake fitting attached to an external surface of the passageway wherein the fitting supplies a stream of gas through a hole in the passageway to a space within the passageway defined between the annular lips at each of the first and second ends of the body. - 2. The crankcase evacuation device of claim , wherein the sleeve and passageway are cylindrical.
- 3. The crankcase evacuation device of claim 1 or 2, wherein the plurality of holes in the annular joint are spaced at equidistant intervals.
- 4. The crankcase evacuation device of claim 3, wherein the plurality of holes is six holes.
- 5. l'he crankcase evacuation device of any one of claims 1 to 4, wherein the stream of gas comes from exhaust gas of combustion chambers of the internal combustion engine being expelled from the engine, exhaust gas of the combustion chambers of the internal combustion chambers being fed from a turbocharger, or gas being fed to the internal combustion engine from a supercharger.
- 6. The crankcase evacuation device of any one of claims 1 to 5, wherein the sleeve is made of aluminum.
- 7. The crankcase evacuation device of claim 6, wherein the aluminum is T6 aluminum.
- 8. The crankcase evacuation device of any one of claims 1 to 7, wherein each of the plurality of holes in the annular joint is at an angle of 9 degrees to the second stepped region of the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2949792A CA2949792A1 (en) | 2016-11-24 | 2016-11-24 | Crankcase evacuation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2949792A CA2949792A1 (en) | 2016-11-24 | 2016-11-24 | Crankcase evacuation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2949792A1 true CA2949792A1 (en) | 2018-05-24 |
Family
ID=62188868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2949792A Abandoned CA2949792A1 (en) | 2016-11-24 | 2016-11-24 | Crankcase evacuation device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2949792A1 (en) |
-
2016
- 2016-11-24 CA CA2949792A patent/CA2949792A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20191126 |