CN103422930A - Intake engine valves - Google Patents
Intake engine valves Download PDFInfo
- Publication number
- CN103422930A CN103422930A CN2013101695060A CN201310169506A CN103422930A CN 103422930 A CN103422930 A CN 103422930A CN 2013101695060 A CN2013101695060 A CN 2013101695060A CN 201310169506 A CN201310169506 A CN 201310169506A CN 103422930 A CN103422930 A CN 103422930A
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- Prior art keywords
- valve
- engine valve
- tapering
- mentioned
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
- B23P15/002—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings poppet valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lift Valve (AREA)
Abstract
The invention provides an intake engine valve that can increase the flow rate of intake air and the tumble flow while ensuring the strength of the engine valve. The intake engine valve (20) used for opening and closing an intake port of an engine may include a valve head (22) and a valve stem (24). The intake engine valve (20) may have a tapered portion (26) positioned between the valve head (22) and the valve stem (24) tapering from a larger size to a smaller size in the direction of the valve stem. The outer circumferential surface of the tapered portion (26) may be formed as a tapered surface extending along a straight line as viewed in cross section with a taper angle ([theta1]).The valve stem (24) may include a small diameter portion (30) positioned between a guide stem portion (28) and a stem end portion (29) and having an external diameter smaller than an external diameter or external diameters of the guide stem portion (28) and the stem end portion (29). The guide stem portion (28) may be guided by a valve guide of the engine.
Description
Technical field
The present invention relates to a kind of air inlet engine valve.
Background technique
As engine valve, there is example engine valve as described in Patent Document 1.Below patent documentation 1(, be called " past case ") in, valve head (is being equivalent to this specification described " valve head ".) diameter be made as Φ D, by valve stem (described with this specification " engine valve stem " is identical) apart from the valve head surface roughly the diameter at Φ D/2 place be made as Φ d
2Mushroom valve poppet valve in, valve stem apart from the valve head surface roughly the part in the scope of Φ D/2 be provided with diameter and be less than Φ d
2Minor diameter part.
Patent documentation 1: Japanese Patent Publication 5-36009 communique
Adopt past case, due to the part in the scope of Φ D/2 roughly apart from the valve head surface of minor diameter part being located to valve stem, so the bar of minor diameter part is long naturally is restricted.Thereby, in the situation that, for air inlet, have and make charge flow rate and roll stream (Japanese: the also less such problem of effect タ Application Block Le stream) increased.In addition, if only depend on the bar that extends minor diameter part long, be difficult to guarantee its intensity.
Summary of the invention
Problem to be solved by this invention is to provide a kind of air inlet engine valve that can when guaranteeing intensity, increase charge flow rate and roll stream.
Above-mentioned problem can solve with engine valve by take the air inlet that structure that claims are put down in writing is purport.
Adopt the air inlet engine valve of the 1st technological scheme, it is opened and closed for the suction port to motor, this air inlet comprises by forging the gentle door of the valve head formed bar section with engine valve, wherein, there is tapering between valve head and engine valve stem, this tapering is formed by path towards the engine valve stem side from the valve head side, and the outer circumferential face in this tapering forms the conical surface that has the cone angle of regulation while with straight line, meaning the cross section in this tapering, in engine valve stem, the guide rod section of the valve guide bushing of launched machine guiding and be formed with path bar section by between the end bar section of tapering side, the external diameter of this path bar section is less than the external diameter of above-mentioned bar section.Adopt this structure, can improve intensity by between the valve head being formed by forging and engine valve stem, tapering being set, this tapering is formed by path towards the engine valve stem side from the valve head side, and the outer circumferential face in this tapering forms the conical surface that has the cone angle of regulation while with straight line, meaning the cross section in this tapering.Thus, in engine valve stem, can extend in the guide rod section of the valve guide bushing of launched machine guiding longly with the bar of path bar section by forming between the end bar section of tapering side, and can increase charge flow rate and roll stream.Thereby, can when guaranteeing intensity, increase charge flow rate and roll stream.
Adopt the air inlet engine valve of the 2nd technological scheme, wherein, the back of tapering and valve head is for forging surface.Thereby, carry out the situation of total processing with machinings such as utilizing grinding and compare, can reduce labor content, reduce costs.
Adopt the air inlet engine valve of the 3rd technological scheme, wherein, the rod end by guide rod section side of path bar section when path bar section forms valve and opens is positioned at the position near the rod end by air inlet side of valve guide bushing.Thereby, can make charge flow rate and roll stream to be increased to maximum or to be increased to approaching maximum.
The accompanying drawing explanation
Fig. 1 carries out with engine valve the plan view that biopsy cavity marker devices means to the air inlet of a mode of execution.
Fig. 2 means the plan view of air inlet with the periphery of the valve head of engine valve.
Fig. 3 means the sectional view of the air inlet of the motor under the valve open mode with the periphery of engine valve.
Fig. 4 means the sectional view of the air inlet of the motor under the valve-closing state with the periphery of engine valve.
Fig. 5 means the plan view of the air inlet of comparative example with the periphery of the valve head of engine valve.
Fig. 6 means the plan view that air inlet is compared with comparative example with the periphery of the valve head of engine valve.
Embodiment
Below, use the accompanying drawing explanation for implementing embodiments of the present invention.For convenience of explanation, after the air inlet to motor describes by the structure of the periphery of engine valve, put off until some time later bright air inlet engine valve.Fig. 3 means the sectional view of the air inlet of the motor under the valve open mode with the periphery of engine valve, and Fig. 4 means the sectional view of the air inlet of the motor under the valve-closing state with the periphery of engine valve.The above-below direction of take in Fig. 3 and Fig. 4 in addition, illustrates the air inlet engine valve as benchmark.
As shown in Figure 3, be formed with the suction port 12 that is communicated in firing chamber 11 on the cylinder head 10 of motor (internal-combustion engine).Downstream at suction port 12 disposes valve seat 13.In addition, dispose the metal valve guide bushing 14 that is concentric circles with valve seat 13 on cylinder head 10.Have for being specifically valve seat 13 to suction port 12() air inlet of the valve head 22 that opened and closed is specifically engine valve stem 24 with engine valve 20() take the mode that (being above-below direction at Fig. 3) slides vertically and be supported on valve guide bushing 14.In addition, in air inlet, with engine valve 20, carry out valve while opening, leave valve seat 13 by making valve head 22, thereby air is via suction port 12 flowing in combustion chambers 11.In addition, when air inlet is carried out valve-closing with engine valve 20 (with reference to Fig. 4), by making valve head 22, be seated at valve seat 13, can stop air from suction port 12 flowing in combustion chambers 11.
Next, above-mentioned engine valve 20 for air inlet is described.Fig. 1 carries out with engine valve the plan view that biopsy cavity marker devices means to air inlet, and Fig. 2 means the plan view of air inlet with the periphery of the valve head of engine valve.
As shown in Figure 1, engine valve for air inlet (below, be called " engine valve ") 20 consists of mushroom valve poppet valve, and this mushroom valve poppet valve has valve head 22 and the engine valve stem 24 formed by forging.Valve head 22 and engine valve stem 24 form concentric circles.At the outer circumferential face of the tip portion (upper end portion) of engine valve stem 24, be formed with along circumferential continuous annular slot 25.Although not shown annular slot 25, annular slot 25 is mounting grooves of collar (the Japanese: リ テ ー Na) use of the valve spring in valve actuating gear.In addition, the side end face, large footpath (lower end surface) of valve head 22 becomes firing chamber 11(towards motor with reference to Fig. 3) valve surface 22a.Central part at valve surface 22a is formed with more shallow recess 23.In addition, engine valve 20 be the raw material by such as by heat-resisting steel, titanium alloys etc. forged form after, regulation position (aftermentioned) implemented to machining (for example grinding) form.
As shown in Figure 2, between above-mentioned valve head 22 and above-mentioned engine valve stem 24, at joint, be formed with the tapering 26 formed by forging drawing (Japanese: Forging makes the order I).Tapering 26 from valve head 22 sides (downside) towards engine valve stem 24 sides (upside) by path.The outer circumferential face in tapering 26 forms the conical surface that has the taper angle theta 1 of regulation while with straight line, meaning 26De cross section, tapering.Taper angle theta 1 is set as for example 20 °.In addition, taper angle theta 1 is not defined as 20 °.In addition, the minimum diameter 26d in tapering 26 is the raw-material external diameters before forging.In addition, from valve surface 22a, the height H 1 by till the rod end of path side to tapering 26 is for example 10mm.In addition, height H 1 is not defined as 10mm.
In above-mentioned engine valve stem 24, will be by above-mentioned valve guide bushing 14(with reference to Fig. 3) part of guiding is called guide rod section 28, will lean on 26Ce De end, tapering to divide (underpart) to be called end bar section 29.Be formed with path bar section 30 between guide rod section 28 and end bar section 29, the external diameter 30d of this path bar section 30 is less than the external diameter of bar section 28, bar section 29.The external diameter 30d of path bar section 30 is for example Φ 4.5mm.In addition, external diameter 30d is not defined as Φ 4.5mm.In addition, in the part of the remainder except annular slot 25 and path bar section 30 of engine valve stem 24 and comprise guide rod section 28 and the part of end bar section 29 forms with external diameter 24d.In addition, from above-mentioned valve surface 22a, the height H 2 by till the rod end 30a of guide rod section 28 sides to path bar section 30 is for example 37mm.In addition, height H 2 is not defined as 37mm.
The rod end 30a by guide rod section 28 sides of the path bar section 30 when as shown in Figure 3, above-mentioned path bar section 30 forms valve and opens is positioned at the position near the rod end 14a by suction port 12 sides (downside) of above-mentioned valve guide bushing 14.In addition, as shown in Figure 2, the end (upper end portion) by guide rod section 28 sides of path bar section 30 is set as the joint 31a of upside, and in addition, the end (underpart) by end bar section 29 sides of path bar section 30 is set as the joint 31b of downside.The outer circumferential face of joint 31a, joint 31b forms respectively the curved surface be connected smoothly with bar section 28, bar section 29.
In above-mentioned valve head 22, at the peripheral part of head dorsal part (that side contrary with valve surface 22a), be formed with circular interface (Japanese: Off ェ ー ス face) 32.Interface 32 forms the conical surface that has the taper angle theta 2 of regulation while take the cross section that straight line meaned from the outer circumference end of valve head 22 towards valve dorsal part direction (in Fig. 2 as above) by path.In addition, taper angle theta 2 is for example 45 °.In addition, taper angle theta 2 is not defined as 45 °.
Be formed with and there is the cylindric of the external diameter identical with the external diameter by large footpath side at interface 32 and all end faces 34 that axial length is shorter in the outer circumference end of above-mentioned valve head 22.In addition, the peripheral part at the something or somebody to fall back on of valve head 22 dorsal part is formed with circular inclined-plane 36.Inclined-plane 36 form take straight line mean from interface 32 by the outer circumference end of path side towards valve dorsal part direction (in Fig. 2 as above) by path cross section the time there is the conical surface of cone angle (also referred to as the angle of tilt) θ 3 of regulation.In addition, angle of tilt θ 3 is for example 12.5 °.In addition, angle of tilt θ 3 is not defined as 12.5 °.
Be formed with at the head dorsal part of above-mentioned valve head 22 concave curved surface 38 that the outer circumference end of leaning on the path side for the outer circumference end by large footpath side by above-mentioned tapering 26 and above-mentioned inclined-plane 36 couples together.The curve that the cross section of concave curved surface 38 is R by radius of curvature forms.Radius of curvature R is for example 7mm.In addition, radius of curvature R is not defined as 7mm.In addition, inclined-plane 36 and concave curved surface 38 form this specification described " head back ".In addition, the reference character L in Fig. 1 and Fig. 2 means the axis of engine valve 20.
After having forged above-mentioned engine valve 20, the interface 32 of above-mentioned valve head 22 and all end faces 34, engine valve stem 24(are specifically comprised to guide rod section 28, end bar section 29, path bar section 30 and annular slot 25) outer circumferential face implement machining (for example grinding).In addition, tapering 26 and head back (inclined-plane 36 and the concave curved surface 38) of valve head 22 do not ground and kept forging surperficial reset condition.In addition, from valve surface 22a, the height H 1 by till the rod end of path side to tapering 26 is equivalent to engine valve stem 24 apart from the height H 1 that valve head 22 sides (downside) are ground to the abrasive tip formed.In addition, sometimes all end faces 34 of valve head 22 are not ground yet.In addition, both can be to rod end surface (upper-end surface) 24a(of engine valve stem 24 with reference to Fig. 1) ground, can not ground yet.
Adopt above-mentioned engine valve 20 for air inlet, can improve intensity by between the valve head 22 being formed by forging and engine valve stem 24, forming tapering 26, this tapering 26 is formed by path towards engine valve stem 24 sides from valve head 22 sides, and the outer circumferential face in this tapering 26 forms the conical surface that has the taper angle theta 1 of regulation while with straight line, meaning 26De cross section, this tapering.Thus, the bar of the path bar section 30 by extending engine valve stem 24 is long, can increase charge flow rate and roll stream.Thereby, can when guaranteeing intensity, increase charge flow rate and roll stream.
In addition, tapering 26 and head back (inclined-plane 36 and concave curved surface 38) is to forge surface.Thereby, carry out the situation of total processing with machinings such as utilizing grinding and compare, can reduce labor content, reduce costs.
The rod end 30a by guide rod section 28 sides of the path bar section 30 when in addition, path bar section 30 forms valve and opens is positioned at the position near the rod end 14a by suction port 12 sides of valve guide bushing 14.Thereby, can make charge flow rate and roll stream be increased to maximum or be increased to close to maximum.In addition, the situation that the rod end 30a by guide rod section 28 sides of the path bar section 30 when valve is opened forms path bar section 30 in the mode that is positioned at the position that enters into valve guide bushing 14 is different, can prevent the minimizing that the bar supported by valve guide bushing 14 of guide rod section 28 when air-stop gate is opened is grown.
Next, with comparative example, above-mentioned engine valve 20 is described with comparing.Fig. 5 means the plan view of the air inlet of comparative example with the periphery of the valve head of engine valve, and Fig. 6 means the plan view that air inlet is compared with comparative example with the periphery of the valve head of engine valve.In Fig. 6, solid line means the engine valve (below, be called " embodiment's engine valve ") 20 of above-mentioned mode of execution.Dotted line means the engine valve (mark drawings attached mark 120) of comparative example.In addition, also the repetitive description thereof will be omitted to mark identical reference character by the position identical with embodiment's engine valve 20 in the engine valve 120 to comparative example.
As shown in Figure 5, the engine valve 120 of comparative example has valve head 122 and engine valve stem 124, but the tapering 26(of engine valve 20 that does not have an embodiment is with reference to Fig. 2).In addition, do not form embodiment's the path bar 30(of section of engine valve 20 with reference to Fig. 2 in the engine valve stem 124 of engine valve 120).The external diameter 124d of engine valve stem 124 is identical with the external diameter 24d of embodiment's engine valve 20.In addition, engine valve stem 124 is for example 14mm apart from the height h1 that valve head 122 sides (downside) is ground to the abrasive tip formed.Thereby the situation that is 14mm with the height h1 of the abrasive tip of comparative example is compared, the height H 1(of embodiment's abrasive tip is with reference to Fig. 2) be reduced to 10mm.
In above-mentioned valve head 122, with embodiment similarly, be formed with interface 32 and all end faces 34 at the peripheral part of head dorsal part.In addition, the head dorsal part at valve head 22 is formed with circular chamfering inclined-plane 137.The chamfering θ 4 on chamfering inclined-plane 137 is for example 30 °.Be formed with at the head dorsal part of valve head 22 concave curved surface 138 that the outer circumference end of leaning on the path side for the outer circumference end of the rod end by valve head 22 sides (downside) by above-mentioned engine valve stem 24 and above-mentioned chamfering inclined-plane 137 couples together.The curve that the cross section of concave curved surface 138 is r by radius of curvature forms.That is, the chamfering inclined-plane 137 of comparative example is not set in embodiment's engine valve 20, and compares with the radius of curvature r of the concave curved surface 138 of comparative example, the radius of curvature R (with reference to Fig. 2) of embodiment's concave curved surface 38 is by path.Thereby the wall thickness of embodiment's valve head 22 is thinner than the wall thickness (with reference to Fig. 6) of the valve head 122 of comparative example.In addition, in the engine valve 120 of comparative example, the machinings such as utilization grinding are always processed.That is, the whole outer circumferential face of engine valve 120 is implemented to the machinings such as grinding.
Adopt embodiment's engine valve 20, be with the difference of the engine valve 120 of comparative example, can improve intensity by tapering 26 is set on engine valve stem 24.Thus, the bar of path bar section 30 that can extend engine valve stem 24 is long, and can increase charge flow rate and roll stream.In addition, adopt engine valve 20, tapering 26 and head back (inclined-plane 36 and concave curved surface 38) is for forging surface.Thereby, carry out the engine valve 120 of the comparative example of total processing with machinings such as utilizing grinding and compare, can reduce labor content, reduce costs.In addition, adopt engine valve 20, make the wall thickness of valve head 22 be thinner than the wall thickness of the engine valve 120 of comparative example, and can reduce the height H 1 of abrasive tip.Thus, the bar of path bar section 30 that can extend engine valve stem 24 is long, and can increase charge flow rate and roll stream.Meanwhile, can make engine valve 20 lightweights.
The present invention is not limited to above-mentioned mode of execution, without departing from the spirit and scope of the invention, can be changed the present invention.
Description of reference numerals
10, cylinder head; 12, suction port; 13, valve seat; 14, valve guide bushing; 14a, rod end; 20, air inlet engine valve; 22, valve head; 24, engine valve stem; 26, tapering; 28, guide rod section; 30, path bar section; 30a, rod end; 36, inclined-plane (part at head back); 38, concave curved surface (part at head back).
Claims (3)
1. an air inlet engine valve, it is opened and closed for the suction port to motor, and this air inlet comprises by forging gentle bar section of the valve head formed with engine valve, it is characterized in that,
There is tapering between above-mentioned valve head and above-mentioned engine valve stem, this tapering is formed by path towards the engine valve stem side from the valve head side, and the outer circumferential face in this tapering forms the conical surface that has the cone angle of regulation while with straight line, meaning the cross section in this tapering
In above-mentioned engine valve stem, be formed with path bar section by the guide rod section of the valve guide bushing of above-mentioned motor guiding with by between the end bar section of above-mentioned tapering side, the external diameter of this path bar section is less than the external diameter of above-mentioned bar section.
2. air inlet engine valve according to claim 1, is characterized in that,
The back of above-mentioned tapering and valve head is for forging surface.
3. air inlet engine valve according to claim 1 and 2, is characterized in that,
The rod end by guide rod section side of this path bar section when above-mentioned path bar section forms valve and opens is positioned at the position near the rod end by air inlet side of above-mentioned valve guide bushing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012117368A JP5964134B2 (en) | 2012-05-23 | 2012-05-23 | Engine valve for intake |
| JP2012-117368 | 2012-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103422930A true CN103422930A (en) | 2013-12-04 |
Family
ID=49620586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101695060A Pending CN103422930A (en) | 2012-05-23 | 2013-05-09 | Intake engine valves |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20130312694A1 (en) |
| JP (1) | JP5964134B2 (en) |
| CN (1) | CN103422930A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003311A (en) * | 2015-08-18 | 2015-10-28 | 湖南天雁机械有限责任公司 | Engine valve with different neck structures |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108290256B (en) * | 2015-12-01 | 2020-12-11 | 巴勒特锻造有限公司 | Fluid tip and method of making same |
| CN105888764A (en) * | 2016-04-13 | 2016-08-24 | 殷志成 | Stepped bar type valve |
| US10844758B2 (en) * | 2019-01-22 | 2020-11-24 | Caterpillar Inc. | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003311A (en) * | 2015-08-18 | 2015-10-28 | 湖南天雁机械有限责任公司 | Engine valve with different neck structures |
| CN105003311B (en) * | 2015-08-18 | 2018-02-02 | 湖南天雁机械有限责任公司 | The engine valve of different neck structures |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130312694A1 (en) | 2013-11-28 |
| JP5964134B2 (en) | 2016-08-03 |
| JP2013245558A (en) | 2013-12-09 |
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Application publication date: 20131204 |