CN107762585B - Integrated variable valve timing system device - Google Patents
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- CN107762585B CN107762585B CN201711141757.2A CN201711141757A CN107762585B CN 107762585 B CN107762585 B CN 107762585B CN 201711141757 A CN201711141757 A CN 201711141757A CN 107762585 B CN107762585 B CN 107762585B
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- 239000003921 oil Substances 0.000 claims abstract description 90
- 239000010705 motor oil Substances 0.000 claims abstract description 30
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 14
- -1 chromium aluminum silicon Chemical compound 0.000 claims description 14
- 230000037452 priming Effects 0.000 claims description 14
- 229910052796 boron Inorganic materials 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 229910052786 argon Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 4
- 238000007733 ion plating Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to an integrated variable valve timing system device, and belongs to the technical field of automobile VVT systems. According to the integrated variable valve timing system device, engine oil control valves are integrally arranged in an exhaust phaser and an intake phaser, a plurality of oil pressure arms are uniformly distributed on the outer side of a rotor at intervals, oil path holes are formed in two sides of each oil pressure arm and are respectively connected with an opening oil path hole and a reset oil path hole of the engine oil control valve, a mounting hole is formed in the middle of the rotor, the engine oil control valve is arranged in the mounting hole, and a plurality of opening oil path holes and reset oil path holes are formed in the outer side of the engine oil control valve; the device can solve the technical problems of split arrangement, large occupied space, low response speed and poor running performance of the structure in the prior art. The device has the characteristics of compact structure, simple assembly and mute operation.
Description
Technical Field
The invention relates to the technical field of automobile VVT systems, in particular to an integrated variable valve timing system device.
Background
Under a specific engine working condition, the variable valve timing system (VVT system) adjusts the intake and exhaust quantity and time and changes the valve overlap angle by controlling the opening angle of the intake valve to advance and retard, so as to increase the intake charge and efficiency, better organize intake vortex, adjust the explosion pressure and the residual exhaust quantity of the cylinder, and obtain the improvement of the comprehensive performances of engine power, torque, emission, fuel economy, comfort and the like, thereby solving the technical contradiction of mutual restriction among various performance indexes of the traditional fixed valve timing engine. The variable valve timing system generally consists of a phaser and an engine oil control valve, and the engine oil control valve is mainly used for precisely controlling the flow of oil, so that the precise control of the cam phase of an engine can be realized, and in order to ensure the service performance of the engine oil control valve, hardening and lubrication treatment are usually carried out on the reversing rod of the engine oil control valve and the inside of a valve body, so as to prevent worn particles, particularly metal or metal particles, from entering an electromagnetic driver to cause the control stability and precision to be poor.
In the prior art, a phaser and an engine oil control valve of a common variable valve timing system device are of split type structures, a control oil way is further required to be arranged between the engine oil control valve and the phaser to connect the phaser and the engine oil control valve, the space occupied by the integral structure is large, the split type structure causes time required for oil pressure transmission, the response speed of the phaser is low, and large noise exists between a rotor and a stator in the existing phaser during operation.
Disclosure of Invention
In order to solve the above technical problems in the prior art, an object of the present invention is to provide an integrated variable valve timing system device.
The utility model provides a variable valve timing system device of integral type, includes phaser and engine oil control valve, its characterized in that: the phaser comprises a rotor and a stator, wherein a plurality of sealing convex walls are uniformly arranged on the inner side of the stator at intervals, an oil pressure cavity is formed between the adjacent sealing convex walls between the stator and the rotor, a plurality of oil pressure arms are uniformly arranged on the outer side of the rotor at intervals, the oil pressure arms are positioned between the two adjacent sealing convex walls and divide the oil pressure cavity into two parts, oil passage holes are formed on two sides of the oil pressure arms, and the oil passage holes are correspondingly connected with an opening oil passage hole and a reset oil passage hole of an engine oil control valve respectively; the middle part of the rotor is provided with a mounting hole, and the engine oil control valve is in threaded connection with the mounting hole.
The engine oil control valve comprises a valve body, a valve seat, a valve sleeve and a reversing rod; the valve body is provided with an oil inlet end and an oil outlet end; the side wall of the oil inlet end is provided with external threads, and the side wall of the oil outlet end is provided with an opening oil passage hole and a resetting oil passage hole; the valve seat and the valve sleeve are arranged in an inner cavity of the valve body, the valve seat is positioned near the oil inlet end and is provided with a through hole communicated with the oil inlet end, the valve sleeve is provided with an inner oil hole matched with the opening oil passage hole and the resetting oil passage hole, a rolling body is arranged between the valve sleeve and the valve seat, a reversing rod capable of moving along the axial direction of the valve sleeve is arranged in the inner cavity of the valve sleeve, the reversing rod is provided with a convex ring in sliding fit with the wall of the inner cavity of the valve sleeve, and the convex ring is provided with a film layer with a low friction coefficient.
Wherein the low friction coefficient film layer is a boron doped silicon carbonitride film layer with the thickness of 2.0-10 mu m. Silicon measured by XPS in the boron doped silicon carbonitride film layer: nitrogen: carbon: the molar ratio of boron is 100:85-120:12-35:5-12.
Wherein, a chromium aluminum silicon priming coat with the thickness of 0.10-1.0 mu m is coated between the convex ring and the low friction coefficient film layer. In the chromium-aluminum-silicon priming layer, the content of chromium is 10-25at%, the content of silicon is 15-35at%, and the balance is aluminum.
Buffer grooves are formed in two sides of the oil pressure arm of the rotor, and buffer protrusions matched with the buffer grooves are correspondingly arranged on the side of the sealing convex wall.
The variable valve timing system device of the present invention has the following advantageous effects:
1. The engine oil control valve and the phaser are integrally arranged, the structure is more compact, the applicable vehicle type is wider, the engine installation space is greatly saved, and meanwhile, the response speed is faster and the work is more accurate.
2. The rotor and the oil pressure arm are integrally formed, so that the machining precision is higher, errors in split assembly can be avoided, an external sealing mechanism is not needed, the working precision is improved, and the service life is prolonged; and the buffer structure is arranged between the rotor and the stator, so that noise is eliminated.
3. The engine oil control valve has excellent wear resistance and friction performance, and good service stability and durability.
Drawings
Fig. 1 is a schematic view showing a half-section of a phaser in an integrated variable valve timing system apparatus of the present invention.
Fig. 2 is a schematic diagram showing the overall structure of a phaser in the integrated variable valve timing system apparatus of the present invention.
Fig. 3 is a schematic view showing a semi-sectional structure of an oil control valve in the integrated variable valve timing system apparatus of the present invention.
Fig. 4 is a schematic view showing the external structure of an oil control valve in the integrated variable valve timing system apparatus of the present invention.
Fig. 5 is a schematic view of an integrated variable valve timing system apparatus of the present invention.
The meanings indicated by the reference numerals in the drawings are respectively: 10-engine oil control valve, 11-valve body, 12-valve seat, 13-valve sleeve, 15-external screw thread, 16-opening oil passage hole, 17-reset oil passage hole, 18-ball body, 19-reversing lever, 20-phaser, 21-rotor, 22-stator, 23-sealed convex wall, 24-oil pressure cavity, 25-oil pressure arm, 26-oil passage hole, 27-mounting hole, 28-buffer slot and 29-buffer bulge.
Detailed Description
The variable valve timing system apparatus according to the present invention will be further described with reference to specific embodiments to help those skilled in the art to more fully understand the inventive concept, technical solution of the present invention.
The integrated variable valve timing system apparatus of the present invention includes a phaser 20 as shown in fig. 1-2 and an oil control valve 10 as shown in fig. 3-4. As shown in fig. 1-2, the phaser 20 includes a rotor 21 and a stator 22, a plurality of sealing convex walls 23 are uniformly spaced on the inner side of the stator 22, an oil pressure cavity 24 is formed between adjacent sealing convex walls 23 between the stator 22 and the rotor 21, a plurality of oil pressure arms 25 are uniformly spaced on the outer side of the rotor, the oil pressure arms 25 are positioned between two adjacent sealing convex walls 23 and divide the oil pressure cavity 24 into two parts, oil passage holes 26 are respectively arranged on two sides of the oil pressure arms 25, and the oil passage holes 26 are respectively connected with the opening oil passage hole 16 and the reset oil passage hole 17 of the engine oil control valve 10; the middle part of the rotor is provided with a mounting hole 27, and the external thread 15 of the engine oil control valve 10 is screwed in the mounting hole 27; buffer grooves 28 are formed in two sides of the oil pressure arm of the rotor, and buffer protrusions 29 matched with the buffer grooves 28 are correspondingly formed in the side of the sealing convex wall. As shown in fig. 3 to 4, the oil control valve 10 of the present invention includes a valve body 11, a valve seat 12, and a valve housing 13. The valve body 11 is provided with an oil inlet end and an oil outlet end; an external thread 15 is arranged on the side wall of the oil inlet end, and an opening oil passage hole 16 and a reset oil passage hole 17 are arranged on the side wall of the oil outlet end. The valve seat 12 and the valve sleeve 13 are arranged in the inner cavity of the valve body 11, the valve seat 12 is positioned near the oil inlet end and is provided with a through hole communicated with the oil inlet end, the valve sleeve 13 is provided with an inner oil hole matched with the opening oil passage hole and the resetting oil passage hole, a rolling body 18 is arranged between the valve sleeve 13 and the valve seat 12, a reversing rod 19 capable of moving along the axial direction of the valve sleeve is arranged in the inner cavity of the valve sleeve 13, the reversing rod 19 is provided with a convex ring in sliding fit with the wall of the inner cavity of the valve sleeve, and the convex ring is provided with a film layer with a low friction coefficient. The opening of the inner oil hole can be controlled through the movement of the convex ring, and then the oil flow direction of the engine oil to the oil circuit hole of the phaser can be controlled.
As shown in fig. 5, the electronic controller ECU collects signals of the engine speed, the engine load, the camshaft position sensor, the crankshaft position sensor and the water temperature sensor, calculates and determines the output duty ratio of the oil control valve, drives the oil in the oil path of the system to squeeze the rotor and drive the camshaft to rotate, and makes the camshaft advance, retard or keep unchanged relative to the crankshaft phase, thereby realizing timing. Specifically, the electronic controller ECU obtains a basic duty ratio from the engine speed and the water temperature, obtains a correction value to the basic duty ratio from a difference between a camshaft target phase (determined from the engine speed and the engine load) and an actual phase of the camshaft, and then determines an output duty ratio of the engine oil control valve.
In the invention, the reversing lever of the engine oil control valve is made of aluminum alloy, for example, 6000 series aluminum-silicon-magnesium aluminum alloy can be adopted. In order to ensure control accuracy and a sliding fit of the collar, the surface of the collar is finished and coated with a low friction coefficient film. Because the thermal expansion coefficient between the convex ring of the aluminum alloy and the film layer with low friction coefficient is not matched, firstly, a chromium aluminum silicon priming layer is coated on the convex ring of the aluminum alloy to improve the bonding strength between the film layer with low friction coefficient and the convex ring. Before coating the chrome aluminum silicon priming layer, firstly, alkali washing is carried out on the reversing rod, especially the convex ring part, so as to remove the aluminum oxide film on the surface, and the reversing rod is rinsed with water and dried after alkali washing. Then, the reversing rod is placed in PVD coating equipment, and a chromium-aluminum-silicon priming layer is coated on the surface of the convex ring, wherein the thickness of the chromium-aluminum-silicon priming layer is 0.10-1.0 mu m, preferably 0.20-0.50 mu m, and the chromium content in the chromium-aluminum-silicon priming layer is 10-25 at%, the silicon content is 15-35 at%, and the balance is aluminum. The chromium aluminum silicon priming layer can be formed by adopting a PVD (physical vapor deposition) film plating method such as conventional vapor deposition, sputtering, ion plating and the like, preferably adopting an ion plating process, and applying a bias voltage of-300 to-600V to a reversing rod which is a film plating object during coating. In the present invention, the low friction coefficient film layer is a boron doped silicon carbonitride film layer having a thickness of 2.0 to 10 μm (preferably 2.5 to 8.0 μm), and silicon measured by XPS in the boron doped silicon carbonitride film layer: nitrogen: carbon: the molar ratio of boron is 100:85-120:12-35:5-12. The boron-doped silicon carbonitride film layer takes SiH 4、N2、C2H2、B2H6 as a supply gas, and can be prepared by a plasma enhanced chemical vapor deposition method, and the coating temperature is 300-400 ℃. As an example, firstly, a chrome aluminum silicon priming layer is coated on the convex ring surface of the reversing rod in an ion plating device, the background vacuum degree in the ion plating device is 5×10 -3 Pa, then 10-50 sccm argon is introduced, and 300-500V direct current voltage is applied to generate argon plasma for pre-sputtering so as to remove the oxide film layer on the convex ring surface of the reversing rod. Then introducing 50-100 sccm argon, applying 400V direct current voltage to generate argon plasma, setting the ionization voltage of the chromium aluminum silicon composite target to be 80V, and coating a chromium aluminum silicon priming layer on the convex ring surface of the reversing rod. The chromium aluminum silicon priming layer, the reversing rod and the boron doped silicon carbonitride film layer all show good matching performance, and particularly can obtain good bonding strength after heat treatment. The boron doped silicon carbonitride film layer is obtained by coating in a plasma enhanced chemical vapor deposition device provided with a remote plasma generator, the frequency of a radio frequency power supply is 13.56MHz, and the power is 1000W. And (3) placing the reversing rod plated with the chromium aluminum silicon priming layer into a coating cavity of a deposition device, vacuumizing to 10 -5 Pa, then introducing 50-100 sccm argon, and applying 400V direct current voltage to generate argon plasma for pre-sputtering for 5 minutes. Then introducing argon and reaction gas, wherein the flow rate of the argon is 50-100 sccm, the flow rate of SiH 4 is 50-200 sccm, the flow rate of N 2 is 50-100 sccm, the flow rate of C 2H2 is 12-25 sccm, the flow rate of B 2H6 is 3-10 sccm, the pressure in a coating chamber is 0.5-2.5 Pa, the deposition temperature is 350 ℃, and the bias voltage applied to a reversing rod is-400V; annealing heat treatment is carried out in argon atmosphere after deposition, wherein the heat treatment temperature is 400 ℃ and the time is 30 minutes. The molar ratio of Si, N, C and B in the film layer and the thickness of the film layer can be controlled by adjusting the flow rate of each precursor, the coating time and other parameters. The low friction coefficient film layer adopted by the invention can obviously reduce the surface roughness of the film layer and improve the wear resistance by doping a proper amount of boron atoms, and the bonding strength between the film layer and a workpiece is not influenced. In the present invention, when the content of the doped boron atom exceeds the upper limit, it is not only advantageous to reduce the roughness of the film layer, but also the bonding strength with the convex ring of the reversing lever is affected, thereby exhibiting poor wear resistance. And also exhibits poor wear resistance when the doped boron atoms are below the lower limit. Table 1 shows examples and comparative examples of different thicknesses and compositions (analyzed by X-ray photoelectron spectroscopy XPS).
TABLE 1
Hardness (Berkovich's conical diamond indenter) and coefficient of friction (friction object is a stainless steel ball with a radius of 5 μm, load of 8mN, sliding rate of 100 nm/s) were measured using Nano Test 600, surface roughness Ra of the film was measured with reference to GB/T1031-2009, bonding strength of the film was measured with reference to German Manual of Engineers (VDI 3198) press-in method, and standard DIN EN 1071-6:2006-01 measures the abrasion resistance of the film layer, and the results are shown in tables 2 and 3.
TABLE 2
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Hardness (GPa) | 15.5 | 15.1 | 15.3 | 15.3 | 15.8 | 16.8 |
| Coefficient of friction mu | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.05 |
| Roughness Ra (mum) | 0.035 | 0.038 | 0.025 | 0.025 | 0.032 | 0.042 |
| Bond strength | HF1 | HF1 | HF1 | HF1 | HF1 | HF1 |
| Wearing capacity (m 3m-1N-110-15) | 0.5 | 0.5 | 0.3 | 0.3 | 0.5 | 0.6 |
TABLE 3 Table 3
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Hardness (GPa) | 15.8 | 13.2 | 15.7 | 15.8 | 16.2 | 13.6 |
| Coefficient of friction mu | 0.04 | 0.08 | 0.04 | 0.04 | 0.06 | 0.06 |
| Roughness Ra (mum) | 0.032 | 0.075 | 0.030 | 0.033 | 0.072 | 0.065 |
| Bond strength | HF4 | HF4 | HF2-3 | HF2-3 | HF1 | HF2-3 |
| Wearing capacity (m 3m-1N-110-15) | Stripping off | Stripping off | Greater than 5 | Greater than 10 | Greater than 5 | Greater than 10 |
It will be apparent to those skilled in the art that the present invention has been described in detail by way of illustration only, and it is not intended to be limited by the above-described embodiments, as long as various insubstantial modifications of the method concepts and aspects of the invention are employed or the inventive concepts and aspects of the invention are directly applied to other applications without modification, all within the scope of the invention.
Claims (5)
1. The utility model provides a variable valve timing system device of integral type, includes phaser and engine oil control valve, its characterized in that: the phaser comprises a rotor and a stator, wherein a plurality of sealing convex walls are uniformly arranged on the inner side of the stator at intervals, an oil pressure cavity is formed between the adjacent sealing convex walls between the stator and the rotor, a plurality of oil pressure arms are uniformly arranged on the outer side of the rotor at intervals, the oil pressure arms are positioned between the two adjacent sealing convex walls and divide the oil pressure cavity into two parts, oil passage holes are formed on two sides of the oil pressure arms, and the oil passage holes are correspondingly connected with an opening oil passage hole and a reset oil passage hole of an engine oil control valve respectively; the middle part of the rotor is provided with a mounting hole, and the engine oil control valve is in threaded connection with the mounting hole; the engine oil control valve comprises a valve body, a valve seat, a valve sleeve and a reversing rod; the valve body is provided with an oil inlet end and an oil outlet end; the side wall of the oil inlet end is provided with external threads, and the side wall of the oil outlet end is provided with an opening oil passage hole and a resetting oil passage hole; the valve seat and the valve sleeve are arranged in the inner cavity of the valve body, the valve seat is positioned near the oil inlet end and is provided with a through hole communicated with the oil inlet end, the valve sleeve is provided with an inner oil hole matched with the opening oil passage hole and the resetting oil passage hole, a rolling body is arranged between the valve sleeve and the valve seat, a reversing rod capable of moving along the axial direction of the valve sleeve is arranged in the inner cavity of the valve sleeve, the reversing rod is provided with a convex ring in sliding fit with the wall of the inner cavity of the valve sleeve, and the convex ring is provided with a film layer with a low friction coefficient; the low friction coefficient film layer is a boron doped silicon carbonitride film layer with the thickness of 2.0-10 mu m, and silicon measured by XPS in the boron doped silicon carbonitride film layer: nitrogen: carbon: the molar ratio of boron is 100:85-120:12-35:5-12, a chromium aluminum silicon priming layer with the thickness of 0.10-1.0 mu m is coated between the convex ring and the low friction coefficient film layer, the chromium content in the chromium aluminum silicon priming layer is 10-25 at%, the silicon content is 15-35 at% and the balance is aluminum, and the convex ring on the reversing rod is made of aluminum alloy.
2. The integrated variable valve timing system apparatus according to claim 1, characterized in that: the electronic controller ECU collects signals of the engine speed, the engine load, the camshaft position sensor, the crankshaft position sensor and the water temperature sensor, calculates and determines the output duty ratio of the engine oil control valve, drives engine oil in an oil way of the system to squeeze the rotor and drive the camshaft to rotate, so that the camshaft is advanced, retarded or kept unchanged relative to the crankshaft phase, and timing is realized.
3. The integrated variable valve timing system apparatus according to claim 2, characterized in that: the electronic controller ECU obtains a basic duty ratio from the engine speed and the water temperature, obtains a correction value for the basic duty ratio from the difference value of the target phase of the camshaft and the actual phase of the camshaft, and then determines the output duty ratio of the engine oil control valve.
4. The integrated variable valve timing system apparatus according to claim 3, characterized in that: the camshaft target phase is determined by an engine speed and an engine load.
5. The integrated variable valve timing system apparatus according to claim 1, characterized in that: buffer grooves are formed in two sides of the oil pressure arm of the rotor, and buffer protrusions matched with the buffer grooves are correspondingly arranged on the side of the sealing convex wall.
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| CN201711141757.2A CN107762585B (en) | 2017-11-17 | 2017-11-17 | Integrated variable valve timing system device |
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| CN201711141757.2A CN107762585B (en) | 2017-11-17 | 2017-11-17 | Integrated variable valve timing system device |
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| CN107762585A CN107762585A (en) | 2018-03-06 |
| CN107762585B true CN107762585B (en) | 2024-04-26 |
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| CN112253276A (en) * | 2019-07-22 | 2021-01-22 | 句容嘉晟汽车配件有限公司 | Phaser in VVT system |
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|---|---|---|---|---|
| GB1339742A (en) * | 1970-03-19 | 1973-12-05 | Dunlop Holdings Ltd | Friction materials |
| CN103470325A (en) * | 2013-09-24 | 2013-12-25 | 东风汽车公司 | Hydraulic VVT (Variable Valve Timing) phase control method |
| CN104696038A (en) * | 2015-01-22 | 2015-06-10 | 台州德尔福汽车部件有限公司 | Oil duct structure of VVT (variable valve timing) system |
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| CN106762003A (en) * | 2017-03-27 | 2017-05-31 | 江苏海龙电器有限公司 | For the electromagnetic hydraulic valve of camshaft phase regulation |
| CN207583452U (en) * | 2017-11-17 | 2018-07-06 | 浙江富杰德汽车系统有限公司 | integrated variable valve timing system device |
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| CN106150587A (en) * | 2016-08-29 | 2016-11-23 | 台州德尔福汽车部件有限公司 | A kind of middle variable valve timing apparatus and electromotor |
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| CN107762585A (en) | 2018-03-06 |
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