CN201581948U - Air inlet valve and exhaust valve of engine - Google Patents
Air inlet valve and exhaust valve of engine Download PDFInfo
- Publication number
- CN201581948U CN201581948U CN2009202691738U CN200920269173U CN201581948U CN 201581948 U CN201581948 U CN 201581948U CN 2009202691738 U CN2009202691738 U CN 2009202691738U CN 200920269173 U CN200920269173 U CN 200920269173U CN 201581948 U CN201581948 U CN 201581948U
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- valve
- air valve
- reduces
- cervix
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Abstract
The utility model provides an air inlet valve and an exhaust valve of an engine, which aims at the problem of product effectiveness lose of the existing B series engine air valve caused by reasons such as overlarge head size, heavy weight, over temperature in the position of a second heat point caused by high heat capacity in work, too small diameter of the second heat point, insufficient mechanical strength, too long heat transfer distance from the head to the rod part, insufficient temperature reduction in the position of the second heat point, insufficient neck intensity and the like. The utility model improves the structure of the air valve, reduces the heat capacity of the head of the air valve, improves the neck rigidity of the air valve, reduces the material consumption, reduces motion inertia during the work of the air valve, reduces the impact force, reduces the processing stress, improves the processing precision, and simultaneously reduces the material cost and the processing cost. The products have long service life. Because the structure of the project products is greatly improved through being compared with the original products, the antifatigue performance of the processed products is enhanced, and the service life of the products is prolonged from 150,000km to more than 250,000km.
Description
Technical field
The utility model relates to a kind of intake valve and exhaust valve of motor.
Background technique
Valve is as the executive component in the engine valve actuating mechanism, because its specifically functional and bad working environment of undertaking, valve lost efficacy and happens occasionally, and gently then undermined power, and heavy then machine is scrapped even produced serious accident.The B Engine Series is with its compact structure, and horsepower is powerful, and characteristics such as cost performance height are widely used in motors military, motor vehicles for civilian use.
B Engine Series when work exhaust valve head bears maximum temperature and reaches more than 950 ℃, and the maximum temperature of its neck second focus and is being born very big impact alternate load also about 850 ℃.The engine operation environment is abominable, operating mode often exceeds design standard, valve fracture failure accidents such as turn around happens occasionally, according to statistics, and because of the valve failure accidents causes outside claimable amount huge, carry out under the situation that rate of fault is higher, economic loss is huge of valve installation back, set about from the causative mechanism of analyzing diesel engine spiracle operating mode and early fracture thereof,, analyzed for residual losing efficacy through visiting user's sampling survey, concrete vehicle difference, behaviour in service also has than big-difference.The main failure forms of engine valve:
Fatigue fracture in the lock dog clamping range of A intake valve bar top,
The fatigue fracture that the B intake valve is expanded at the many circular arcs of dish bar transition position,
The C intake valve is at the early fatigue fracture of dish bar transition position,
The D exhaust valve is in the fatigue fracture at the second focus place,
E exhaust valve and piston are pinched and at the early fatigue fracture at the second focus place,
The bending of F intake valve bar portion.
It is excessive mainly to show as head volume, and weight is heavier, the higher second focus place overtemperature that causes of thermal capacity during work; The second focus place diameter is too little, and mechanical strength is not enough; Head is oversize to bar portion heat transfer distances, and the cooling of the second focus place is not enough; Neck insufficient strength etc. is the main cause that causes product failure.
Summary of the invention
For solving the above-mentioned problems in the prior art, the utility model provides a kind of intake valve and exhaust valve and both production technologies of motor, has improved the structure of valve, and reduces, optimizes machining processes, reduces machining stress.
The technological scheme that the utility model adopted is as follows:
The intake valve of this motor, at least the valve head that comprises valve stem, forms by air valve cervix and valve retainer portion, air valve cervix connects valve stem and valve retainer portion, and valve stem length is 100～101mm, the minimum place of air valve cervix diameter is 8.7～8.9mm, and the transition cone angle is 15 °～20 °.
The exhaust valve that is complementary with the intake valve of motor, at least the valve head that comprises valve stem, forms by air valve cervix and valve retainer portion, air valve cervix connects valve stem and valve retainer portion, valve stem length is 100～101mm, the thickness of valve retainer portion is 3.8～4.3mm, and the transition cone angle is 15 °～20 °, and air valve cervix is taper, the angle of the bus elongation line of the air valve cervix conical surface is 6 °～10 °, and the minimum place of air valve cervix diameter is 8.7～8.9mm.
Adopt advantage of the present utility model:
1. reduce valve head thermal capacity and raising air valve cervix rigidity and reduce materials consumption;
2. the movement inertia when reducing valve work reduces impact force;
3. minimizing machining stress improves machining accuracy, reduces cost of material and processing cost simultaneously;
4. life of product is long, because the structure of project product has had bigger improvement than original product, the product antifatigue after the processing strengthens, and life of product is brought up to more than 250,000 kilometers by 150,000 kilometers.
Description of drawings
Fig. 1 is the structural representation of intake valve;
Fig. 2 is the structural representation of exhaust valve.
Among the figure, 1. valve stem, 2. air valve cervix, 3. valve retainer portion, L1: valve stem is long, L2: the minimum place of air valve cervix diameter, L4: the thickness of valve retainer portion, a: air valve cervix transition cone angle, b: the angle of the bus elongation line of the air valve cervix conical surface.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Shown in Figure 1, the intake valve of this motor, at least comprise valve stem 1, the valve head of forming by air valve cervix 2 and valve retainer portion 3, air valve cervix 2 connects valve stem 1 and valve retainer portion 3, the long L1 of valve stem is 100～101mm, specifically be meant valve stem polishing length, the diameter L2 of the minimum place of air valve cervix is 8.7～8.9mm, increased the diameter L2 of the minimum place of original B Engine Series air valve cervix, thereby increase the rigidity at this place, simultaneously on technology when emphasis dish portion and the transition position grinding of bar portion smooth transition do not have step and projection, stop the wedge angle stress effect, thereby solved the Problem of Failure such as early fatigue fracture of intake valve at dish portion and bar portion transition position, air valve cervix transition cone angle a is 15 °～20 °, thereby has solved the fatigue fracture Problem of Failure of intake valve in dish portion and the many circular arc expansions of bar portion transition position.
The exhaust valve that is complementary with intake valve motor shown in Figure 2, at least comprise valve stem 1, the valve head of forming by air valve cervix 2 and valve retainer portion 3, air valve cervix 2 connects valve stem 1 and valve retainer portion 3, the long L1 of valve stem is 100～101mm, specifically be meant valve stem polishing length, the thickness L4 of valve retainer portion is 3.8～4.3mm, thereby reducing the back, dish portion thickness can reduce the valve head weight, reach and reduce valve head thermal capacity, movement inertia when reducing valve work, reduce impact force, reduce the purpose of cost of material and processing cost simultaneously, air valve cervix transition cone angle a is 15 °～20 °, reduced original exhaust valve transition cone angle, thereby reduce valve head thermal capacity, solved the Problem of Failure that piece burns in exhaust valve dish portion, air valve cervix is taper, the angle b of the bus elongation line of the air valve cervix conical surface is 6 °～10 °, the diameter L2 of the minimum place of air valve cervix is 8.7～8.9mm, improves the air valve cervix rigidity, thereby solves the fatigue fracture of valve at the second focus place.
Claims (2)
1. the intake valve of a motor, at least the valve head that comprises valve stem, forms by air valve cervix and valve retainer portion, air valve cervix connects valve stem and valve retainer portion, it is characterized in that: valve stem length is 100～101mm, the minimum place of air valve cervix diameter is 8.7～8.9mm, and the transition cone angle is 15 °～20 °.
2. exhaust valve that is complementary with the described intake valve of claim 1, at least the valve head that comprises valve stem, forms by air valve cervix and valve retainer portion, air valve cervix connects valve stem and valve retainer portion, it is characterized in that: valve stem length is 100～101mm, the thickness of valve retainer portion is 3.8～4.3mm, and the transition cone angle is 15 °～20 °, and air valve cervix is taper, the angle of the bus elongation line of the air valve cervix conical surface is 6 °～10 °, and the minimum place of air valve cervix diameter is 8.7～8.9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202691738U CN201581948U (en) | 2009-12-30 | 2009-12-30 | Air inlet valve and exhaust valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202691738U CN201581948U (en) | 2009-12-30 | 2009-12-30 | Air inlet valve and exhaust valve of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201581948U true CN201581948U (en) | 2010-09-15 |
Family
ID=42723945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202691738U Expired - Fee Related CN201581948U (en) | 2009-12-30 | 2009-12-30 | Air inlet valve and exhaust valve of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201581948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020154139A1 (en) * | 2019-01-22 | 2020-07-30 | Caterpillar Inc. | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
| CN113302381B (en) * | 2019-01-22 | 2024-07-09 | 卡特彼勒公司 | Engine and gas exchange valve with under-head fillet contoured for relieving chordal stress |
-
2009
- 2009-12-30 CN CN2009202691738U patent/CN201581948U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020154139A1 (en) * | 2019-01-22 | 2020-07-30 | Caterpillar Inc. | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
| US10844758B2 (en) | 2019-01-22 | 2020-11-24 | Caterpillar Inc. | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
| CN113302381A (en) * | 2019-01-22 | 2021-08-24 | 卡特彼勒公司 | Engine and gas exchange valve with under head fillet contoured for relieving chordal stress |
| GB2595154A (en) * | 2019-01-22 | 2021-11-17 | Caterpillar Inc | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
| GB2595154B (en) * | 2019-01-22 | 2023-03-29 | Caterpillar Inc | Engine and gas exchange valve with under-head fillet contoured for chordal stress mitigation |
| CN113302381B (en) * | 2019-01-22 | 2024-07-09 | 卡特彼勒公司 | Engine and gas exchange valve with under-head fillet contoured for relieving chordal stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20161230 |