CN101666252B - Oil return device of internal-combustion engine variable valve timing mechanism - Google Patents
Oil return device of internal-combustion engine variable valve timing mechanism Download PDFInfo
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- CN101666252B CN101666252B CN2009100703523A CN200910070352A CN101666252B CN 101666252 B CN101666252 B CN 101666252B CN 2009100703523 A CN2009100703523 A CN 2009100703523A CN 200910070352 A CN200910070352 A CN 200910070352A CN 101666252 B CN101666252 B CN 101666252B
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- oil
- control valve
- timing mechanism
- variable valve
- oil control
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- Lubrication Of Internal Combustion Engines (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to an oil return device of an internal-combustion engine variable valve timing mechanism, which comprises an engine oil control valve seat, an engine oil control valve and a cylinder block, wherein the engine oil control valve seat is formed at the upper part of a cam bearing cap; the engine oil control valve is arranged in the engine oil control valve seat, one end of the oil control valve is provided with an axial oil discharge hole, and the side of the engine oil control valve seat is provided with an oil drainage hole communicated with the oil discharge hole of the engine oil control valve; the oil drainage hole is provided with a hollow bolt through which oil can pass, a downward oil return pipe is externally connected with the hollow bolt, and the other end of the oil return pipe is connected with the cylinder block. In the invention, oil drained from the variable valve timing mechanism directly flows to the cylinder block through the oil return pipe and flows back to an oil sump tank, oil in the oil return pipe brings along a certain pressure to accelerate the flow speed of the oil in the pipe, and the more the oil are drained, the faster the flow speed of the oil in the oil return pipe is, so oil in the oil sump tank can be quickly supplied. Because the oil drainage of the variable valve timing mechanism is smooth, the lubrication of the internal-combustion engine and the normal work of the variable valve timing mechanism are ensured.
Description
Technical field
The present invention relates to a kind of lubrication system of internal-combustion engine, relate to particularly that a kind of that machine oil is refluxed is unobstructed, guarantee the Variable Valve Time gear oil return apparatus of internal combustion engine lubrication and Variable Valve Time gear proper functioning.
Background technique
Along with developing of automobile industry, more and more higher to Economy, power character and the emission request of motor.At present, the variable valve timing apparatus that abbreviates VVT as has been widely used in vehicle energy saving and the environmental protection, and VVT is mainly controlled by the ECU electronic unit.
Owing to be subjected to spatial constraints, particularly the space layout of small displacement engine cylinder head is very compact, after arranging air flue and intake and exhaust manifold mounting points, the space of being left is very little, and its back oil road of existing mechanism is all to be arranged in engine cylinder cover inside, the design space of back oil road is little, and oil return is insufficient.Particularly after having increased vvt mechanism, the machine oil that has certain pressure that is released by vvt mechanism will amass full cylinder head inside at short notice, causes oil return insufficient.When serious, can cause engine lubrication system and vvt mechanism cisco unity malfunction.
In addition, in the cylinder head casting process,, occur easily every skin because back oil road is very little, defectives such as core fracture, casting manufacturability is bad, in the cylinder head course of working, occurs easily blocking bits etc. in the back oil road, seriously influences the oil return effect.For head it off, existing a kind of way is to adopt machining mode processing back oil road, but so just needs cylinder head suitably to increase volume, causes the volume of cylinder head to increase.
VVT generally adopts direct draining in cylinder cap in the prior art, and machine oil is back to oil sump again from cylinder cap then.The VVT draining that also has is in the timing gear case, and machine oil is back to oil sump from the timing gear case then.In said apparatus, machine oil all is to rely on the self gravitation natural back flow in oil sump, if drainback passage area deficiency, it is smooth to cause machine oil to reflux.Machine oil in the oil supplying device of VVT even the oil sump of can finding time, thus the proper functioning of the lubricated and VVT of internal-combustion engine influenced.The present invention is primarily aimed at the oil return design of VVT, and a kind of oil return apparatus of simple possible is provided.
Summary of the invention
The present invention provides a kind of structural limitations at existing small displacement engine cylinder head for solving the technical problem that exists in the known technology, under the prerequisite that guarantees the cylinder head casting manufacturability, fully satisfy the oil return demand of internal combustion (IC) engine lubricating oil, to guarantee the Variable Valve Time gear oil return apparatus of lubricating system of IC engine and vvt mechanism proper functioning.
The technological scheme that the present invention takes for the technical problem that exists in the solution known technology is: oil return device of internal-combustion engine variable valve timing mechanism of the present invention comprises: the OCV Oil Control Valve seat that is formed on camshaft-bearing cap top; Be contained in the OCV Oil Control Valve in the OCV Oil Control Valve seat; Cylinder block; OCV Oil Control Valve one end is provided with an axial oil drainage hole, be provided with a draining hole that is communicated with the OCV Oil Control Valve oil drainage hole in OCV Oil Control Valve seat side, the draining hole is equipped with hollow and is crossed the whelk bolt, and hollow is crossed the whelk bolt and is circumscribed with downward return tube, and the return tube the other end is connected with cylinder block.
Described draining hole is arranged on OCV Oil Control Valve seat side and OCV Oil Control Valve oil drainage hole corresponding position.
Described return tube is connected on the oil return bolt of cylinder block bottom spill port.
Described return tube is flexible tube or rigid pipe.
Advantage and good effect that the present invention has are: in the present invention, between OCV Oil Control Valve seat and cylinder block return tube is set, the machine oil that releases from Variable Valve Time gear flows directly to cylinder block by return tube, returns in the oil sump.In return tube, the machine oil that Variable Valve Time gear is released has certain pressure, can quicken the flowing velocity of machine oil in pipe, and the machine oil that releases is many more, and then the machine oil flow velocity in the return tube is fast more, makes the machine oil in the oil sump obtain replenishing rapidly.Because the Variable Valve Time gear draining is unobstructed, thereby has guaranteed internal combustion engine lubrication and Variable Valve Time gear proper functioning.
In the present invention, return tube can be convenient to during for flexible tube connect and arrange, then can increase the reliability of oil return apparatus when return tube is rigid pipe.
Description of drawings
Fig. 1 is an oil return device of internal-combustion engine variable valve timing mechanism structural drawing of the present invention;
Fig. 2 is return tube of the present invention and cylinder block connection diagram;
Fig. 3 is fuel supply line of the present invention, the return tube installation diagram on internal-combustion engine.
Critical piece symbol description in the accompanying drawing:
1: fuel supply line 2: return tube 3: the OCV Oil Control Valve seat
4: oil filter 5: OCV Oil Control Valve 6: the fuel feeding bolt
7: cross whelk bolt 8: draining hole 9: camshaft-bearing cap
10: oil sump 11: spill port 12: the oil return bolt
13: cylinder block 14: fuel supply chamber 15: oil drainage hole
Embodiment
It is following that the present invention will be described in detail with reference to drawings and Examples.
The present invention be directed to the structural limitations of existing float amount IC engine cylinder head, and to the improvement of the oil return circuit of Variable Valve Time gear.The present invention is applicable to the 3GA2 type petrol engine of independent research, and discharge capacity is 1.0 liters.The Variable Valve Time gear of 3GA2 type petrol engine is installed on the camshaft.
Oil return device of internal-combustion engine variable valve timing mechanism of the present invention, as Fig. 1, Fig. 2, shown in Figure 3, Fig. 1 is an oil return device of internal-combustion engine variable valve timing mechanism structural drawing of the present invention; Fig. 2 is return tube of the present invention and cylinder block connection diagram; Fig. 3 is fuel supply line of the present invention, the return tube installation diagram on internal-combustion engine.
Oil return device of internal-combustion engine variable valve timing mechanism of the present invention is made of OCV Oil Control Valve seat 3, OCV Oil Control Valve 5, mistake whelk bolt 7, return tube 2, cylinder block 13 and oil return bolt 12.
OCV Oil Control Valve seat of the present invention and camshaft-bearing cap 9 are integrally formed, and the OCV Oil Control Valve seat is positioned at camshaft-bearing cap top, and OCV Oil Control Valve is installed in the OCV Oil Control Valve seat.
The OCV Oil Control Valve top is formed with fuel supply chamber 14, and fuel supply line 1 is communicated with fuel supply chamber by fuel feeding bolt 6, and fuel supply chamber is provided with oilhole and is communicated to OCV Oil Control Valve.
Be provided with an axial oil drainage hole 15 at OCV Oil Control Valve one end, be provided with a draining hole 8 in OCV Oil Control Valve seat side, the draining hole is communicated with the OCV Oil Control Valve oil drainage hole.Therefore the draining hole should be arranged on the OCV Oil Control Valve seat side with OCV Oil Control Valve oil drainage hole corresponding position.
The whelk bolt 7 excessively of hollow is housed in the draining hole, and hollow is crossed the whelk bolt and is circumscribed with downward return tube, and return tube faces down via the outer of camshaft-bearing cap, and its other end is connected with cylinder block 13.
The cylinder block bottom is provided with boss, has spill port 11 on the boss, and return tube is connected on the spill port by oil return bolt 12, thereby is connected with cylinder block.The oil return bolt also is middle porose hollow bolt.Machine oil flows into cylinder block by return tube, flow back in the oil sump 10 again.
Described return tube is flexible tube or rigid pipe.Return tube can be convenient to during for flexible tube connect and arrange, then can increase the reliability of oil return apparatus when return tube is rigid pipe.
Adopt I. C. engine oil oil feeding line of the present invention and oil return circuit, as shown in Figure 3, oil feeding line is as follows: oil pump (not shown), main oil gallery (not shown), oil filter 4, fuel supply line 1, fuel feeding bolt 6, OCV Oil Control Valve seat 3, OCV Oil Control Valve 5, camshaft phaser (not shown), this oil duct are that VVT internal-combustion engine fuel feeding is used.
Oil return circuit is: the machine oil of being returned by Variable Valve Time gear flows into OCV Oil Control Valve 5, OCV Oil Control Valve seat, crosses whelk bolt 7, return tube 2, oil return bolt 12, cylinder block 13, flows into oil sump 10 at last.
In the present invention, between OCV Oil Control Valve seat and cylinder block return tube is set, the machine oil that releases from Variable Valve Time gear flows directly to cylinder block by return tube, returns in the oil sump.The machine oil that releases in return tube has certain pressure, can quicken the flowing velocity of machine oil in pipe, and the machine oil that releases is many more, and then the machine oil flow velocity in the return tube is fast more, makes the machine oil in the oil sump obtain replenishing rapidly.Because the Variable Valve Time gear draining is unobstructed, thereby has guaranteed internal combustion engine lubrication and Variable Valve Time gear proper functioning.
Claims (4)
1. an oil return device of internal-combustion engine variable valve timing mechanism comprises: the OCV Oil Control Valve seat that is formed on camshaft-bearing cap top; Be contained in the OCV Oil Control Valve in the OCV Oil Control Valve seat; Cylinder block; It is characterized in that OCV Oil Control Valve one end is provided with an axial oil drainage hole, be provided with a draining hole that is communicated with the OCV Oil Control Valve oil drainage hole in OCV Oil Control Valve seat side, the draining hole is equipped with hollow and is crossed the whelk bolt, and hollow is crossed the whelk bolt and is circumscribed with downward return tube, and the return tube the other end is connected with cylinder block.
2. oil return device of internal-combustion engine variable valve timing mechanism according to claim 1 is characterized in that the draining hole is arranged on OCV Oil Control Valve seat side and OCV Oil Control Valve oil drainage hole corresponding position.
3. oil return device of internal-combustion engine variable valve timing mechanism according to claim 1 is characterized in that return tube is connected on the oil return bolt of cylinder block bottom spill port.
4. oil return device of internal-combustion engine variable valve timing mechanism according to claim 1 is characterized in that return tube is flexible tube or rigid pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100703523A CN101666252B (en) | 2009-09-04 | 2009-09-04 | Oil return device of internal-combustion engine variable valve timing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100703523A CN101666252B (en) | 2009-09-04 | 2009-09-04 | Oil return device of internal-combustion engine variable valve timing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666252A CN101666252A (en) | 2010-03-10 |
| CN101666252B true CN101666252B (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100703523A Expired - Fee Related CN101666252B (en) | 2009-09-04 | 2009-09-04 | Oil return device of internal-combustion engine variable valve timing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101666252B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003232B (en) * | 2010-11-25 | 2012-07-11 | 奇瑞汽车股份有限公司 | Connecting pedestal for variable valve timing (VVT) control valve of engine |
| CN102923598A (en) * | 2012-11-06 | 2013-02-13 | 江苏威和重工有限公司 | Connection structure of tooth-embed clutch and main shaft |
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2009
- 2009-09-04 CN CN2009100703523A patent/CN101666252B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101666252A (en) | 2010-03-10 |
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| SE01 | Entry into force of request for substantive examination | ||
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Effective date of registration: 20151231 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Patentee after: China FAW Group Corporation Address before: 300380 Li Lounan, North oblique Township, Xiqing District, Tianjin Patentee before: Tianjin Faw Xiali Automobile Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20160904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |