CN100451302C - Breather device for an engine - Google Patents
Breather device for an engine Download PDFInfo
- Publication number
- CN100451302C CN100451302C CNB200410048805XA CN200410048805A CN100451302C CN 100451302 C CN100451302 C CN 100451302C CN B200410048805X A CNB200410048805X A CN B200410048805XA CN 200410048805 A CN200410048805 A CN 200410048805A CN 100451302 C CN100451302 C CN 100451302C
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- Prior art keywords
- cylinder head
- dividing plate
- breather
- communication passage
- air
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- 238000013022 venting Methods 0.000 claims description 78
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 80
- 239000003595 mist Substances 0.000 abstract description 56
- 238000005192 partition Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 86
- 210000001331 nose Anatomy 0.000 description 10
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
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
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
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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
A breather device allows blow-by gases from an engine cylinder head 7 to be sucked back to an intake passage, while removing oil mist from the blow-by gases before they reach the intake. An engine 1 comprises a cylinder head 7 and a cylinder head cover 9 attached to an upper side of the cylinder head 7 to form a cam chamber 8. A partition plate 40 is attached to a lower side of the cylinder head cover 9 to form a breather chamber 39 and a communication passage 41 is formed through the partition plate 40 for communicating the breather chamber 39 to the cylinder head 7. A gas passage 42 connects an intake passage 30 linked to a cylinder 6 with the breather chamber 39. The communication passage 41 has a lower opening 49 on the side of the cylinder head 7 which opens in a direction along the axis of the camshaft 14.
Description
Technical field
The present invention relates to a kind of air-breather in the motor, when the gas leakage that arrives cam chamber was inhaled into suction tude that is connected with cylinder barrel, this air-breather was used for stoping mist of oil to mix mutually with the gas leakage that is in the cam chamber between cylinder head and the cylinder head end cap.
Background technique
Patent documentation 1 (JP-A-2002-129929) has disclosed the air-breather in a kind of motor.According to the communique of official, motor comprises: a cylinder head; A cylinder head end cap that is attached to the cylinder head upside forms a cam chamber to engage with cylinder head; Be arranged in a camshaft in the cam chamber, this camshaft is supported on the upside of cylinder head to rotate around a horizontally extending generally axis; Be attached to a dividing plate on the cylinder head end cap downside, this dividing plate combines with the cylinder head end cap and forms a venting cavity; A communication passage of passing dividing plate and forming, this communication passage are interconnected cylinder head side and venting cavity; A gas channel, this gas channel are connected the gas-entered passageway and the venting cavity that link to each other with cylinder barrel.In cam chamber, store lubricant oil.
When motor was driven, the gas leakage that arrives the cylinder head side in the cam chamber from the cylinder barrel side was sucked communication passage, venting cavity and gas channel in turn and is entered gas-entered passageway, was inhaled into then in the cylinder barrel and burning therein.
In these cases, being made camshaft rotate the part mist of oil that is spilt by the operation of motor may flow in the venting cavity.But described mist of oil clashes into mutually with the downside of dividing plate and is prevented from flowing in the venting cavity.Like this, burn therein with regard to stoping mist of oil to be inhaled in the cylinder barrel with gas leakage.Thereby the effective consumption that can stop oil plant.
In the superincumbent prior art, the cylinder head side opening of communication passage is at the tangential split shed of camshaft.Like this, the part mist of oil that is spilt in it is tangential by the camshaft that rotates just can enter in the communication passage and the arrival venting cavity by this opening.Therefore, prior art just is not enough to stop mist of oil to mix mutually with gas leakage.
The applicant's imagination arranges that in the near zone of communication passage lower opening portion a baffle plate directly enters described opening to stop mist of oil.But,, in cam chamber, need a space with the described baffle plate of extra layout for accomplishing this point.This situation is not preferred, because arrange the size that just may increase motor like this.
The present invention In view of the foregoing makes, therefore, one object of the present invention is exactly the connecting passage that the gas that releases between cylinder head and cylinder head end cap is inhaled into be connected with cylinder barrel and burns in cylinder barrel, and mist of oil is not mixed mutually with gas leakage, so just can not fall oil plant by effective consumption.
Another object of the present invention is to realize above-mentioned purpose under the situation that does not increase size of engine.
Summary of the invention
Realize that the air-breather in the used motor of the present invention of above-mentioned purpose constructs in the following manner.The used reference number of term in " inventive embodiments " part is not to be used to limit technical scope of the present invention.
Air-breather according to a kind of motor of the present invention comprises: a cylinder head 7; A cylinder head end cap 9, this cylinder head end cap 9 is attached to the upside of cylinder head 7 and forms a cam chamber 8 with cylinder head 7; Camshaft 14,15 be arranged in the cam chamber 8 and the upside that is supported on cylinder head 7 to rotate around axis 11,12 respectively, described axis 11,12 is horizontal-extending generally; Being attached to a dividing plate 40 on cylinder head end cap 9 downsides combines with the cylinder head end cap and forms a venting cavity 39; A communication passage 41 of passing dividing plate 40 and being formed with, this passage 41 is interconnected a side of cylinder head 7 and venting cavity 39; A gas channel 42, this gas channel 42 are connected the gas-entered passageway 30 and the venting cavity 39 that link to each other with cylinder barrel 6.
Wherein, communication passage 41 has a lower opening 49 on the side of cylinder head 7, and this opening 49 is opened along the axial direction of camshaft 14,15.
The air-breather of above-mentioned motor also has a feature, and promptly communication passage 41 has a bottom surface, this bottom surface from venting cavity 39 sides towards the downward-sloping extension of the lower edge of under shed 49.
The air-breather of above-mentioned motor also has a feature, promptly observes along the direction of the axis 11,12 of camshaft 14,15, and under shed 49 overlaps (as shown in Figure 6) with the rotary motion trace 52 of the protrusion nose 18 of camshaft 14,15.
The air-breather of above-mentioned motor also has a feature, and promptly dividing plate 40 has: be attached to a main dividing plate 46 on cylinder head end cap 9 downsides; Be attached to a baffle plate 48 on the main dividing plate 46 in stacked mode, communication passage 41 promptly is formed between main dividing plate 46 and the baffle plate 48; Dividing plate 40 also has the upper shed 50 that is on venting cavity 39 1 sides, and this opening 50 is formed at main dividing plate 46 and is in the part on the baffle plate 48.
The air-breather of above-mentioned motor also has a feature, i.e. the upside of the downside of the edge of opening of upper shed 50 and baffle plate 48 is separated from each other and is formed with a space 53 betwixt.
The air-breather of above-mentioned motor also has a feature, i.e. the upside of the edge of opening of upper shed 50 is downward-sloping gradually towards upper shed 50 from the horizontal zone around the upper shed 50.
The air-breather of above-mentioned motor also comprises: vertically extending a pair of first and second vertical panels 58,59, described vertical panel 58,59 is in the position of space and venting cavity 39 is divided into a space 56 that is in communication passage 41 1 sides and is in a space 57 on gas channel 42 1 sides, first vertical panel 58 upwards protrudes out from dividing plate 40, and second vertical panel 59 protrudes out downwards from the top surface (ceilingsurface) of cylinder head end cap 9.
The air-breather of above-mentioned motor also comprises: be formed with an exhaust port 60 in dividing plate 40 parts under the space between first and second vertical panels 58,59, this exhaust port 60 extends to a side of cylinder head 7.
The air-breather of above-mentioned motor also has a feature, and promptly first vertical panel 58 that upwards protrudes out from dividing plate 40 has an otch 61, this otch 61 be formed at first vertical panel, 58 1 sides than low side.
Description of drawings
Below with reference to the accompanying drawings embodiments of the invention are described, wherein:
Figure 1 shows that from the additional direction of arrow and observe and the sectional view done along the 1-1 line Fig. 4;
Figure 2 shows that the front view of motor;
Figure 3 shows that the side view of motor;
Figure 4 shows that the plane view of motor;
Figure 5 shows that the plane view of parts shown in Figure 1;
Figure 6 shows that from the additional direction of arrow and observe and the sectional view done along the 6-6 line Fig. 4;
Figure 7 shows that from the additional direction of arrow and observe and the sectional view done along the 7-7 line Fig. 4;
Figure 8 shows that the plane view of parts shown in Figure 7.
Embodiment.
In Fig. 2-Fig. 4, reference number 1 indication be mounted in a multi-cylinder (four cylinders) four stroke engine (internal-combustion engine) on vehicle such as the automobile.Motor 1 has an engine block 2 that is supported by car body.
Valve system 10 has admission cam shaft 14 and exhaust cam shaft 15, admission cam shaft 14 and exhaust cam shaft 15 be arranged in the cam chamber 8 and the upside that is supported on cylinder head 7 by bearing 13 rotating in the direction shown in the letter r around axis 11,12 respectively, and extend with the parallel axes of crankshaft 4; This valve system 10 also has chain feedway 16 so that camshaft 14,15 functionally links to each other with crankshaft 4.Camshaft 14,15 all has a spindle unit 17 and and the spindle unit 17 integrally formed protrusion noses 18 that supported by bearing 13.What reference number 19 was indicated is a spark plug.
When driving motor 1, operation by the valve system that links to each other with crankshaft 4 operability, with air 34 and oil plant as air---fuel mixture 35 is supplied to cylinder barrel 6 burning by parts of air intake system 23, and the amount of air 34 is that the openings of sizes by throttle valve 29 is determined.The exhausting air that is produced by burning drains into atmospheric side as waste gas 36 by exhaust system component 24.
Just as shown in institute's drawings attached, motor 1 is furnished with air-breather 37.Air-breather 37 passes back in the cylinder barrel 6 gas leakage 33 that arrives cam chamber 8 to burn, and described gas leakage 33 is because the operation of motor 1 and arriving the cam chamber 8 from crankcase 5 and cylinder barrel 6.
Air-breather 37 has: a metal partion (metp) 40, this metal partion (metp) 40 by fixed component 38 be attached to cylinder head 7 than forming a venting cavity 39 on the downside and with cylinder head 7; A communication passage 41 that in dividing plate 40, forms, this communication passage 41 is interconnected the venting cavity 39 in cylinder head 7 sides and the cam chamber 8; A gas channel 42, the gas-entered passageway 30 of the parts of air intake system 23 that this gas channel 42 will link to each other with cylinder barrel 6 is connected with venting cavity 39.
With axially being defined as vertically of camshaft 14,15, the left-hand side among Fig. 3 and Fig. 4 (arrow Fr is indicated) is defined as the front side herein.The left and right sides of venting cavity 39, dividing plate 40, communication passage 41 and gas channel 42 comprises respectively: a pair of first and second venting cavity 39a, 39b; The a pair of first and second dividing plate 40a, 40b; The a pair of first and second communication passage 41a, 41b; The a pair of first and second gas channel 42a, 42b.The first venting cavity 39a, the first dividing plate 40a, the first communication passage 41a and the first gas channel 42a are on the admission cam shaft 14.The second venting cavity 39b, second partition 40b, the second communication passage 41b and the second gas channel 42b are positioned on the exhaust cam shaft 15.
In this case, camshaft 14,15 axially in look, the first communication passage 41a is formed at the side end (being referred to as " rearward end " hereinafter) of the first dividing plate 40a, and the second communication passage 41b is formed in the end side (being called " front end " hereinafter) of second partition 40b.The first gas channel 42a is interconnected the gas-entered passageway 30 in the suction tude 28 of the end side of the first venting cavity 39a and throttle valve 29 upstreams.The second gas channel 42b is interconnected the gas-entered passageway 30 in the surge-chamber 27 in the side end of the second venting cavity 39b and throttle valve 29 downstreams.Allow gas to flow to used the gas-entered passageway 30 one-way valve 43 from the second venting cavity 39b and be arranged among the second gas channel 42b, this one-way valve 43 is in the mid-length position of the second gas channel 42b.
Between the downside of main dividing plate 46 and baffle plate 48, be formed with described communication passage 41.Communication passage 41 has a under shed 49, at this moment, cylinder head 7 side ends are formed between the outer periphery of the downside of main dividing plate 46 and baffle plate 48, and dividing plate 40 also has the upper shed 50 that is on venting cavity 39 1 sides, and this opening 50 is formed at main dividing plate 46 and is in the part on the baffle plate 48.Under shed 49 and upper shed 50 are rectangle, also can be circle.
Under shed 49 is opened along the axial direction of camshaft 14,15.Communication passage 41 has a bottom surface, this bottom surface under venting cavity 39 side direction towards the lower edge of under shed 49 angle tilt linear extension with about 15-30 degree.The baffle plate 48 of dividing plate 40 is positioned at and protrudes on the nose 18.Minimum clearance between the rotary motion trace 52 of protrusion nose 18 and the baffle plate 48 in Vertical direction is about 5mm.When the direction of the axis 11,12 of camshaft 14,15 is observed (especially as shown in Figure 6), under shed 49 coincides with the track 52 that protrudes nose 18.The downward protruding end of baffle plate 48 is arranged in the near zone of spindle unit 17.
As shown in Figure 1, the edge downside of upper shed 50 and the upside of baffle plate 48 are separated from each other in vertical direction and form a space 53 between the two, and the thickness in space 53 is at least several millimeters.The edge upside of upper shed 50 tilts with the angle that is about the 5-20 degree towards upper shed 50 gradually from the basic horizontal zone around the upper shed 50.
Shown in Fig. 1 and Fig. 5-8, in in the first and second venting cavity 39a, 39b each, a pair of first and second vertical panels 58,59 extend substantially vertically and in vertical separately position positioned opposite, thereby the side in communication passage 41 forms a space 56, and forms a space 57 in a side of gas channel 42.
First vertical panel 58 is made by metal dish and is upwards protruded out from dividing plate 40, and the lower end of first vertical panel 58 is fixed on the main dividing plate 46 of dividing plate 40 by spot welding.Between the protruding end of the top surface of cylinder head end cap 9 and first vertical panel 58, be formed with a gas channel.Second vertical panel 59 protrudes out downwards from the top surface integrity ground of cylinder head end cap 9.Between the protruding end of the upper surface of the main dividing plate 46 of dividing plate 40 and second vertical panel 59, be formed with a gas channel.Second vertical panel 59 can be separated with cylinder head end cap 9.
More particularly, in the first venting cavity 39a, first vertical panel 58 is positioned on the sidepiece of the first communication passage 41a, and second vertical panel 59 is positioned on the sidepiece of the first gas channel 42a.In the second venting cavity 39b, first vertical panel 58 is positioned on the sidepiece of the second gas channel 42b, and vertical panel 59 is positioned on the sidepiece of the second communication passage 41b.
In the first venting cavity 39a, at least a portion that extends perpendicularly to the exhaust port 60 of cylinder head 7 sidepieces is to form in the part of the main dividing plate 46 of dividing plate 40, the main dividing plate 46 of described part be in space between first and second vertical panels 58,59 below.Has otch 61 on the side of first vertical panel, 58 underparts.When arranging exhaust air hole 60 not, the angle of inclination of the bottom surface of communication passage 41 preferably is about 20 degree.
Just as shown in institute's drawings attached, be driven and the opening of throttle valve 29 increases with to a large amount of air of cylinder barrel 6 supplies at motor 1---during fuel mixture 35, motor 1 high speed rotating, the negative pressure that is in the gas-entered passageway 30 of upstream and downstream of the throttle valve 29 in the parts of air intake system 23 increases.Then, by the effect of described negative pressure, the gas leakage 33 on cylinder head 7 one sides in the cam chamber 8 is just sucked in communication passage 41, the venting cavity 39 in turn according to the indicated direction of solid arrow, and enters gas-entered passageway 30.Then, gas leakage 33 is with air---and fuel mixture 35 is inhaled in the cylinder barrel 6 and burns therein.
At the opening that reduces throttle valve 29 to reduce to be supplied to the air of cylinder barrel 6---during the amount of fuel mixture 35, motor 1 rotates with lower speed, and the negative pressure that is in the gas-entered passageway 30 of throttle valve 29 upstream and downstreams in the parts of air intake system 23 reduces.Because the opening of throttle valve 29 reduces, the negative pressure in the gas-entered passageway 30 in the surge-chamber 27 of throttle valve 29 downstream parts just keeps higher level.
Then, effect by the negative pressure in the gas-entered passageway 30 of surge-chamber 27, fresh atmospheric air 34 is just sucked among the first communication passage 41a of the first venting cavity 39a, communication passage 41 of the first gas channel 42a, the venting cavity 39 of gas channel 42 in turn, and according to the indicated side that enters the cylinder head 7 in the cam chamber 8 like that of dotted arrow and mix mutually with gas leakage 33 therein.Then, gas leakage 33 is sucked the second venting cavity 39b, the one-way valve 43 of the second communication passage 41b, the venting cavity 39 of gas channel 41, the second gas channel 42b of gas channel 42 in turn, enter then in the gas-entered passageway 30 in the surge-chamber 27, just as the two-dot chain line arrow is indicated.Then, gas leakage 33 is with air---and fuel mixture 35 is inhaled in the cylinder barrel 6 and burns therein.
According to above-mentioned structure, the under shed 49 of the communication passage 41 on cylinder head 7 one sides is along the axial direction opening of camshaft 14,15, just as special demonstration the among Fig. 1 and Fig. 7.
As mentioned above, when motor 1 was driven, the gas leakage 33 that cylinder head 7 one sides from cam chamber 8 are overflowed was inhaled into communication passage 41, and enters in the venting cavity 39 under the suction function in gas-entered passageway 30.Then, gas leakage 33 passes gas channel 42 and gas-entered passageway 30 and enters cylinder barrel 6 and burn therein.
When motor 1 was driven, camshaft 14,15 rotated according to the indicated direction of letter r, and camshaft 14,15 just splashes mist of oil in their tangent direction.Herein, the under shed 49 of communication passage 41 is opened along the axial direction of camshaft 14,15.
Like this, just can stop the mist of oil that splashes by camshaft 14,15 to enter in the under shed 49 of communication passage 41.That is to say, can stop mist of oil to mix mutually, thereby stop mist of oil to be inhaled in the cylinder barrel 6 and burnedly fall with gas leakage 33 with the gas leakage 33 that is introduced into venting cavity 39 by communication passage 41.The effective consumption that therefore, can stop oil plant.
As mentioned above, the lower edge of the bottom surface of communication passage 41 from a side of venting cavity 39 towards under shed 49 is tilted to down extension.
Like this, even when the mist of oil that is splash in its tangent direction by camshaft 14,15 enters the under shed 49 of communication passage 41, mist of oil also may internal surface attached to communication passage 41 on.Then, oil plant is just smooth-going to lower slider on the downward-sloping bottom surface of communication passage 41, and is back to cylinder head 7 in the cam chamber 8 by under shed 49.
Like this, even under mist of oil enters situation in the under shed 49, also can stop mist of oil to arrive venting cavity 39.That is to say, by venting cavity 39 mist of oil and gas leakage 33 are sucked the effective consumption that then can stop oil plant in the cylinder barrel 6 together by stoping.
As mentioned above, looking in the direction of the axis 11,12 of camshaft 14,15, under shed 49 coincides with the rotary motion trace of the protrusion nose 18 of camshaft 14,15.
Like this, because camshaft 14,15 and dividing plate 40 with a kind of compact arranged in form, then just can stop the effective consumption of oil plant under the situation of the size that does not increase motor 1, communication passage 41 is promptly passed dividing plate 40 and is formed.
As mentioned above, dividing plate 40 has the main dividing plate that is attached on cylinder head end cap 9 downsides 46 and is attached to baffle plate 48 on the main dividing plate 46 in stacked mode, communication passage 41 is formed between main dividing plate 46 and the baffle plate 48, dividing plate 40 also has under shed 49 that forms and the upper shed 50 that forms at the venting cavity 39 side end places of communication passage 41 between the downside of mutual dividing plate 46 and baffle plate 48, this opening 50 is formed at main dividing plate 46 and is in the part on the baffle plate 48.
Like this, because upper shed 50 is hidden from the bottom fully by baffle plate 48, baffle plate 48 arrives venting cavity 39 with regard to stop the mist of oil that is splash by camshaft 14,15 in they are tangential by upper shed.
So just can stop mist of oil to be inhaled in the cylinder barrel 6 by venting cavity 39, thereby can stop the effective consumption of oil plant with gas leakage 33.
Therefore, though the protrusion nose 18 of camshaft 14,15 can splash a large amount of mist of oils, mist of oil can clash into the downside of baffle plate 48 at once mutually.Like this, just can stop mist of oil to enter the under shed of communication passage 41 more reliably.
As mentioned above, the upside of the edge downside of upper shed 50 and baffle plate 48 is separated from each other and has formed a space 53 between the two.
Like this, even the mist of oil that splashes by camshaft 14,15 enter the under shed 49 of communication passage 41 and attached to the internal surface of communication passage 41 on the time, and the oil plant on the internal surface that is attached to communication passage 41 under the energy of gas leakage 33 when venting cavity 39 flows, the edge downside of under shed 49 also can stop flowing of oil plant, and described gas leakage 33 enters venting cavity 39 through communication passage 41.
Like this, even under mist of oil enters situation in the under shed 49, also can stop mist of oil to arrive venting cavity 39.That is to say, by venting cavity 39 mist of oil and gas leakage 33 are sucked the effective consumption that then can stop oil plant in the cylinder barrel 6 together by stoping.
As mentioned above, the edge upside of upper shed 50 tilts towards upper shed 50 gradually from the upside at upper shed 50 horizontal zone edge on every side.
Like this, arrive the upside at upper shed 50 edges even mist of oil passes communication passage 41, also can flow to upper shed 50 owing to the inclination of described upside, and pass back into cylinder head 7 one sides in the cam chamber 8 by communication passage 41 attached to the mist of oil on the described upside.
As mentioned above, with particular reference to accompanying drawing 1 and accompanying drawing 7, in venting cavity 39, paired first and second vertical panels, 58,59 vertical extent and the location, position that is being separated from each other, so just on a side of communication passage 41, form space 56, and on a side of gas channel 42, form space 57.First vertical panel 58 upwards protrudes out from dividing plate 40, and second vertical panel 59 protrudes out downwards from the top surface of cylinder head end cap 9.
Suppose that mist of oil passes communication passage 41 and arrives space 56 on fluid passage 41 1 sides in the venting cavity 39 with gas leakage 33, then in the space 57 on inflow gas passage 42 1 sides herein.In this case, mist of oil and gas leakage are guided by first vertical panel 58 and second vertical panel 59 and its flow direction becomes from the top down and to flow.Like this, mist of oil just under the effect of inertial force attached to the internal surface of venting cavity 39 on or on the surface attached to first, second vertical panel 58,59, thereby can stop mist of oil and gas leakage 33 to enter together in the gas-entered passageway 30.
As mentioned above, the exhaust port 60 that extends to cylinder head 7 one sides is in the part of dividing plate 40, and this part is under the space between first and second vertical panels 58,59.
In venting cavity 39, the 56 most of mist of oils that flow to space 57 are caught by first and second vertical panels 58,59 and are flowed downward from the space.Like this, these oil plants just are back to cylinder head 7 one sides in the cam chamber 8 by exhaust port 60 smooth-goingly.
As mentioned above, the lower end side at first vertical panel 58 that upwards protrudes out from dividing plate 40 is formed with otch 61.
Like this, when oil plant gathers on the upper surface of dividing plate 40, perhaps, in vehicle operating and oil plant when on the upper surface of dividing plate 40, flowing, oil plant flows in the exhaust port 60 by otch 61 with regard to not being subjected to stopping of first vertical panel 58 smooth-goingly, and is back to cylinder head 7 one sides in the cam chamber 8 by exhaust port 60.
Invention has been described by the example in the accompanying drawing in the superincumbent content.But, the one-way valve 43 and the second gas channel 42b can be omitted.In this case, venting cavity 39 can be connected as the gas-entered passageway in the surge-chamber 27 with the gas-entered passageway 30 in throttle valve 29 downstreams by the first gas channel 42a.
To be described effect of the present invention hereinafter.
The present invention relates to a kind of air-breather in the motor, this air-breather comprises: a cylinder head; A cylinder barrel end cap is attached to the upside of cylinder head and forms a cam chamber with cylinder head; Cam shaft arrangement in cam chamber and the upside that is supported on cylinder head rotate with the axis that extends around basic horizontal respectively; Being attached to a dividing plate on the cylinder head end cap downside combines with the cylinder head end cap and forms a venting cavity; A communication passage of passing dividing plate and being formed with, this communication passage are interconnected a side and the venting cavity of cylinder head; A gas channel, this gas channel are connected the gas-entered passageway and the venting cavity that link to each other with cylinder barrel.
Wherein, communication passage has a under shed on the side of cylinder head, and this under shed is opened along the axial direction of camshaft.
As mentioned above, when motor is driven, is inhaled into communication passage under the suction function of gas leakage in gas-entered passageway that cylinder head one side from cam chamber is overflowed and enters in the venting cavity.Then, gas leakage passes gas channel and gas-entered passageway and enters cylinder barrel and burn therein.
When motor was driven, camshaft rotated, and camshaft just splashes mist of oil in their tangent direction.Herein, the under shed of communication passage is opened along the axial direction of camshaft.
Like this, just can stop the mist of oil that splashes by camshaft to enter in the under shed of communication passage.That is to say, can stop mist of oil to mix mutually, thereby stop mist of oil to be inhaled in the cylinder barrel and burnedly fall with gas leakage with the gas leakage that is introduced into venting cavity by communication passage.The effective consumption that therefore, can stop oil plant.
In above-mentioned air-breather, communication passage has a bottom surface, and the lower edge of this bottom surface from venting cavity one side towards under shed is tilted to down extension.
Like this, even when the mist of oil that is splash in its tangent direction by camshaft enters the under shed of communication passage, mist of oil also can internal surface attached to communication passage on.Then, oil plant is just smooth-going to lower slider on the downward-sloping bottom surface of communication passage, and is back to cylinder head one side in the cam chamber by under shed.
Like this, even under mist of oil enters situation in the under shed, also can stop mist of oil to arrive venting cavity.That is to say, by venting cavity mist of oil and gas leakage are sucked the effective consumption that then can stop oil plant in the cylinder barrel together by stoping.
In above-mentioned air-breather, to observe along the axial direction of camshaft, the rotary motion trace of the protrusion nose of under shed and camshaft overlaps.
Like this, because camshaft and dividing plate with compact arranged in form, then just can stop the effective consumption of oil plant under the situation of the size that does not increase motor, communication passage is promptly passed dividing plate and is formed.
In above-mentioned air-breather, dividing plate has: be attached to a main dividing plate on the cylinder head end cap downside; Be attached to a baffle plate on the main dividing plate in stacked mode, communication passage promptly is formed between main dividing plate and the baffle plate; Dividing plate also has a upper shed that is on venting cavity one side, and this upper shed is formed at main dividing plate and is in the part on the baffle plate.
Like this, because upper shed is hidden from the bottom fully by baffle plate, baffle plate arrives venting cavity with regard to stop the mist of oil that is splash by camshaft in they are tangential by upper shed.
So just can stop mist of oil to be inhaled in the cylinder barrel by venting cavity, thereby can stop the effective consumption of oil plant with gas leakage.
In above-mentioned air-breather, the downside of the edge of opening of upper shed and the upside of baffle plate are separated from each other and are formed with a space betwixt.
Like this, even the mist of oil that splashes by camshaft enter the under shed of communication passage and attached to the internal surface of communication passage on the time, and under the energy of oil plant that is attached on the communication passage internal surface at gas leakage when venting cavity flows, the edge downside of under shed also can stop flowing of oil plant, and described gas leakage enters venting cavity through communication passage.
Like this, even mist of oil enters described under shed, also can stop mist of oil to arrive venting cavity.That is to say, by venting cavity mist of oil and gas leakage are sucked the effective consumption that then can stop oil plant in the cylinder barrel together by stoping.
In above-mentioned air-breather, the upside of the edge of opening of upper shed is downward-sloping gradually towards upper shed from the horizontal zone around the upper shed.
Like this, arrive the upside at upper shed edge even mist of oil passes communication passage, also can flow to upper shed owing to the inclination of described upside, and pass back into cylinder head one side in the cam chamber by communication passage attached to the mist of oil on the described upside.
Above-mentioned air-breather also comprises: vertically extending a pair of first and second vertical panels, described vertical panel is in the position of space and venting cavity is divided into a space that is in communication passage one side and is in a space on gas channel one side, first vertical panel upwards protrudes out from dividing plate, and second vertical panel protrudes out downwards from the top surface of cylinder head end cap.
Suppose that mist of oil passes communication passage and arrives space on fluid passage one side in the venting cavity with gas leakage, then in the space on inflow gas passage one side herein.In this case, mist of oil and gas leakage are guided by first vertical panel and second vertical panel and its flow direction becomes from the top down and to flow.Like this, mist of oil just under the effect of inertial force attached to the internal surface of venting cavity on or on the surface attached to first, second vertical panel, thereby can stop mist of oil and gas leakage to enter in the gas-entered passageway together.
Above-mentioned air-breather also comprises: be formed with an exhaust port in the partition part under the space between first and second vertical panels, this exhaust port extends to a side of cylinder head.
In venting cavity, a spatial flow from venting cavity to most of mist of oil in another space is caught by first and second vertical panels and is flowed downward.Like this, these oil plants just are back to cylinder head one side in the cam chamber by exhaust port smooth-goingly.
In above-mentioned air-breather, first vertical panel that upwards protrudes out from dividing plate has an otch, and this notch shape is formed in the low side end place of first vertical panel.
Like this, when gathering on the upper surface of oil plant at dividing plate, perhaps, when flowing on the upper surface of oil plant at dividing plate in vehicle operating, oil plant flows in the exhaust port by otch with regard to not being subjected to for first the stopping of vertical panel smooth-goingly, and is back to cylinder head one side in the cam chamber by exhaust port.
The content of reference symbol and reference number
1. engine
6. cylinder barrel
7. cylinder head
8. cam chamber
9. cylinder head end cap
10. valve system
11. axis
12. axis
14. camshaft
15. camshaft
18. protrusion nose
23. parts of air intake system
29. throttle valve
30. gas-entered passageway
33. gas leakage
34. air
37. air-breather
39. venting cavity
40. dividing plate
41. fluid passage
42. gas channel
46. main dividing plate
48. baffle plate
49. under shed
50. upper shed
52. rotary motion trace
53. space
56. space
57. space
58. first vertical panel
59. second vertical panel
60. exhaust port
61. otch
R. sense of rotation
Claims (9)
1, a kind of air-breather of motor, this air-breather comprises:
Cylinder head;
The cylinder head end cap, this cylinder head end cap is attached to the upside of cylinder head and forms a cam chamber with cylinder head;
Be arranged in the camshaft in the cam chamber, described camshaft supporting rotates so that center on horizontally extending axis at the upside of cylinder head;
Be attached to the dividing plate on the cylinder head end cap downside, this dividing plate combines with the cylinder head end cap and forms venting cavity;
Pass the communication passage that described dividing plate is formed with, this passage is interconnected a side and the venting cavity of described cylinder head; And
Gas channel, this gas channel are connected the gas-entered passageway and the described venting cavity that link to each other with cylinder barrel;
Wherein, described communication passage has a under shed on the side of cylinder head, and this under shed is opened along the axial direction of described camshaft.
2, according to the air-breather of the described motor of claim 1, wherein: described communication passage has a bottom surface, and the lower edge of this bottom surface from venting cavity one side towards under shed is tilted to down extension.
3, according to the air-breather of claim 1 or 2 described motors, wherein: the axial direction along camshaft is seen, the rotary motion trace overlaid of the protrusion nose of described under shed and camshaft.
4, according to the air-breather of claim 1 or 2 described motors, wherein: dividing plate has: be attached to the main dividing plate on the cylinder head end cap downside and be attached to a baffle plate on the main dividing plate in stacked mode, communication passage promptly is formed between main dividing plate and the baffle plate, and described communication passage has a upper shed that is on described venting cavity one side, and the part that this upper shed is passed on the described baffle plate of being positioned at of described main dividing plate forms.
5, according to the air-breather of the described motor of claim 4, wherein: the downside of the edge of opening of described upper shed and the upside of described baffle plate are separated from each other and are formed with a space betwixt.
6, according to the air-breather of the described motor of claim 5, wherein: it is downward-sloping gradually towards described upper shed that the upside of the edge of opening of upper shed surrounds described upper shed zone on every side from level.
7, according to the air-breather of claim 1 or 2 described motors, wherein: this device also comprises: vertically extending a pair of first and second vertical panels, described vertical panel is in the position of space, thereby described venting cavity is divided into a space and a space that is positioned on described gas channel one side that is positioned at described communication passage one side;
Described first vertical panel upwards protrudes out from dividing plate, and described second vertical panel protrudes out downwards from the top surface of described cylinder head end cap.
8, according to the air-breather of the described motor of claim 7, wherein, this device also comprises: an exhaust port, this exhaust port pass the formation of the part under the space between first and second vertical panels that is located at of described dividing plate, and this exhaust port extends to a side of described cylinder head.
9, the air-breather of described motor according to Claim 8, wherein: described first vertical panel that upwards protrudes out from described dividing plate has a kerf, and this notch shape is formed in the lower end of this first vertical panel, one side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003150309A JP2004353505A (en) | 2003-05-28 | 2003-05-28 | Breather device for engine |
| JP2003150309 | 2003-05-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1573039A CN1573039A (en) | 2005-02-02 |
| CN100451302C true CN100451302C (en) | 2009-01-14 |
Family
ID=32677675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410048805XA Expired - Fee Related CN100451302C (en) | 2003-05-28 | 2004-05-28 | Breather device for an engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1482136B1 (en) |
| JP (1) | JP2004353505A (en) |
| CN (1) | CN100451302C (en) |
| GB (1) | GB2402435B (en) |
| MY (1) | MY136461A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4661733B2 (en) * | 2006-08-22 | 2011-03-30 | マツダ株式会社 | Engine oil separator device |
| US8011338B2 (en) | 2008-09-11 | 2011-09-06 | Ford Global Technologies, Llc | Camcover oil separator |
| JP5330050B2 (en) * | 2009-03-26 | 2013-10-30 | 本田技研工業株式会社 | 4-stroke cycle internal combustion engine |
| JP5032641B2 (en) * | 2010-09-06 | 2012-09-26 | 本田技研工業株式会社 | Vehicle engine |
| JP5613594B2 (en) * | 2011-03-03 | 2014-10-29 | 株式会社クボタ | Overhead cam engine |
| JP5740290B2 (en) * | 2011-11-25 | 2015-06-24 | 本田技研工業株式会社 | Oil passage structure of internal combustion engine |
| JP5994362B2 (en) * | 2012-04-27 | 2016-09-21 | トヨタ自動車株式会社 | Engine oil separator |
| CN104594975B (en) * | 2014-12-05 | 2017-12-26 | 重庆龙卓机械制造有限责任公司 | The unidirectional respiratory system of trunnion axis vertical petrol machinery |
| CN104594974B (en) * | 2014-12-05 | 2018-06-12 | 重庆龙卓机械制造有限责任公司 | Trunnion axis vertical petrol machinery |
| JP6412425B2 (en) * | 2014-12-18 | 2018-10-24 | 株式会社マーレ フィルターシステムズ | Oil separator inlet structure of internal combustion engine |
| CN114991986B (en) * | 2021-03-01 | 2024-05-07 | 比亚迪股份有限公司 | Cylinder head cover and engine |
| JP2023135844A (en) * | 2022-03-16 | 2023-09-29 | 本田技研工業株式会社 | Breather structure of internal combustion engine |
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| US4597372A (en) * | 1984-09-26 | 1986-07-01 | Toyota Jidosha Kabushiki Kaisha | Oil separator for blowby gas |
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| CN1254790A (en) * | 1998-11-25 | 2000-05-31 | 本田技研工业株式会社 | Air breather of engine |
| US20020083934A1 (en) * | 2001-01-02 | 2002-07-04 | Ruehlow Gerald C. | Breather for internal combustion engine |
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| JPS59167906U (en) * | 1983-04-26 | 1984-11-10 | 愛知機械工業株式会社 | Oil separation device for internal combustion engine rocker cover |
| JPS61186716U (en) * | 1985-05-15 | 1986-11-21 | ||
| DE3713210A1 (en) * | 1987-04-18 | 1988-11-03 | Porsche Ag | VENTILATION DEVICE WITH INTEGRATED OIL SEPARATOR |
| JPH01157216U (en) * | 1988-04-21 | 1989-10-30 | ||
| JP3137397B2 (en) * | 1991-12-24 | 2001-02-19 | マツダ株式会社 | Oil separator for blow-by gas reduction unit |
| JP3283687B2 (en) * | 1994-02-28 | 2002-05-20 | 株式会社テネックス | Oil mist separator |
| GB9526349D0 (en) * | 1995-12-22 | 1996-02-21 | Rover Group | Separation of oil fromair breather gases |
| JPH1026012A (en) * | 1996-07-10 | 1998-01-27 | Hino Motors Ltd | Oil separator for engine |
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| DE19715061C2 (en) * | 1997-04-11 | 1999-01-21 | Daimler Benz Ag | Ventilation device for a crankcase of an internal combustion engine |
| JP2000045749A (en) * | 1998-07-31 | 2000-02-15 | Tennex Corp | Oil separator for blow-by gas |
| JP3917303B2 (en) * | 1998-09-14 | 2007-05-23 | 本田技研工業株式会社 | Breather structure of 4-cycle engine |
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| JP3378234B2 (en) | 2000-10-25 | 2003-02-17 | 本田技研工業株式会社 | Breather device for internal combustion engine |
| DE10154669A1 (en) * | 2001-11-07 | 2003-05-22 | Porsche Ag | Internal combustion engine with at least two rows of cylinder banks |
-
2003
- 2003-05-28 JP JP2003150309A patent/JP2004353505A/en active Pending
-
2004
- 2004-05-27 MY MYPI20042025A patent/MY136461A/en unknown
- 2004-05-28 EP EP04253174A patent/EP1482136B1/en not_active Expired - Lifetime
- 2004-05-28 CN CNB200410048805XA patent/CN100451302C/en not_active Expired - Fee Related
- 2004-05-28 GB GB0412042A patent/GB2402435B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4597372A (en) * | 1984-09-26 | 1986-07-01 | Toyota Jidosha Kabushiki Kaisha | Oil separator for blowby gas |
| US5129371A (en) * | 1991-09-03 | 1992-07-14 | Saturn Corporation | Cam cover oil separator for crankcase ventilation |
| CN1254790A (en) * | 1998-11-25 | 2000-05-31 | 本田技研工业株式会社 | Air breather of engine |
| US20020083934A1 (en) * | 2001-01-02 | 2002-07-04 | Ruehlow Gerald C. | Breather for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1482136B1 (en) | 2012-03-28 |
| EP1482136A1 (en) | 2004-12-01 |
| CN1573039A (en) | 2005-02-02 |
| MY136461A (en) | 2008-10-31 |
| GB2402435A (en) | 2004-12-08 |
| GB2402435B (en) | 2006-08-02 |
| GB0412042D0 (en) | 2004-06-30 |
| JP2004353505A (en) | 2004-12-16 |
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