CN204371540U - A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system - Google Patents
A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system Download PDFInfo
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- CN204371540U CN204371540U CN201420857450.8U CN201420857450U CN204371540U CN 204371540 U CN204371540 U CN 204371540U CN 201420857450 U CN201420857450 U CN 201420857450U CN 204371540 U CN204371540 U CN 204371540U
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Abstract
A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system disclosed in the utility model, comprises the pump housing, multiple pump oil unit and pump oil unit drives parts, has multiple pump chamber and a pump oil unit drives component working room in the pump housing.Pump oil unit drives parts are a camshaft, are provided with multiple three operating cams spaced apart.Camshaft often rotates a circle, and pump oil number of times is three times of cam number, and between cam spaced apart, pump oil process may partly overlap.Therefore, multi-cylinder high-pressure oil feed pump of the present utility model periodically can provide enough fuel oils to high pressure oil rail, with motor oil spout frequency synchronism, to ensure that generator set is stable, to run efficiently.
Description
Technical field
The utility model relates to a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system, particularly a kind of multi-cylinder high-pressure oil feed pump being applied to diesel generating set Electrocontrolled high-pressure common rail fuel injection system.
Background technique
Diesel generating set is a kind of technology-intensive product, is mainly used in power station, naval vessel, mobile power station and various emergency power station.In recent years, global climate environment sharply worsens, perfect gradually and the continuous of fuel price of Abgasgesetz is risen, and diesel generating set is also gradually towards the future development of green economy.For diesel engine, reduce noise and discharge, the Economy of raising fuel oil becomes the Main Trends of The Development of marine diesel engine, this is that the application of high-pressure common rail technology on diesel generator group provides huge development opportunity.
Electrocontrolled high-pressure common rail fuel injection system, meets the optimal selection of state four and above emission standard as diesel engine, be made up of high-pressure fuel-feed pump, high pressure oil rail, electric-controlled fuel injector, ECU and sensor.Within the system, the major function of high-pressure fuel-feed pump periodically provides enough fuel oils to high pressure oil rail, and to ensure the stable of high pressure oil rail fuel pressure, its fuel feeding moment and fuel delivery size are controlled by ECU.High-pressure fuel-feed pump has plunger pump in upright arrangement and radial rotor pump two profiles formula by Der Grundsatz der Maschinen; By control principle, have and control low pressure oil-feed and control the fuel-displaced two profiles formula of high pressure.
Chinese utility model patent publication number CN101270715 discloses a kind of fuel feed pump of diesel engine high-pressure co-rail fuel oil system, and it is radial rotor pump, and control principle adopts meter in control valve to control low pressure oil-feed.The high-pressure fuel-feed pump compact structure of this model utility, boundary dimension are less, are mainly used in the LD-diesel field that power is lower.
Chinese utility model patent publication number CN 102003319 discloses a kind of high-pressure fuel-feed pump for high-pressure common-rail fuel system, and it is plunger pump in upright arrangement, and control principle is that control high pressure is fuel-displaced.The high-pressure fuel-feed pump of this model utility does not possess superiority in installing space, rotating speed accommodation, cost of production and working service etc., and is mainly used in the Medium or severe type diesel engine of below 400KW.
In the diesel engine realm of powerful peculiar to vessel or generator set, traditional fuel oil supply system is in series by two or more multi-cylinders machinery inline pumps, Injection Pump corresponding with engine cylinder number for oil cylinder number.This needs very large installing space, and the oil supply system motion rigidity be in series is not good enough.Along with the strict implement of Abgasgesetz, the discharge upgrading of big-block engine is also imperative.Design a kind of joint-track type high-power diesel generator set (more than 500KW) with plunger high-pressure fuel-feed pump in upright arrangement, its Power coverage scope is wide, can meet the requirement of high-power diesel generator set fuel delivery.
Model utility content
Technical problem to be solved in the utility model: the narrow limitation not being suitable for high-power diesel generator set for existing plunger oil feed pump in upright arrangement and radial rotor pump in power, and a kind of fuel-displaced plunger multi-cylinder oil feed pump in upright arrangement of high pressure that controls is provided, this plunger multi-cylinder oil feed pump in upright arrangement periodically can provide enough fuel oils to high pressure oil rail, to ensure that generator set is stable, to run efficiently.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
Be applied to a multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system, comprise the pump housing, multiple pump oil unit and pump oil unit drives parts; It is characterized in that:
There is in the described pump housing multiple pump chamber, multiple low pressure grease chamber and a pump oil unit drives component working room, described pump oil unit drives component working room is disposed axially in the described pump housing, and described multiple pump chamber radial direction is positioned at the top of pump oil unit drives component working room side by side and their bottom is connected with the oily unit drives component working room of described pump; The axis of multiple pump chamber is mutually vertical with the axis of described pump oil unit drives component working room; Described multiple low pressure grease chamber to be coaxially arranged on above described pump oil unit drives component working room and to be connected with corresponding pump chamber, and the axis of their common axis of described multiple low pressure grease chamber and multiple pump chamber is mutually vertical and be parallel to each other with the axis of the oily unit drives component working room of described pump;
It is indoor that multiple pump oil unit is arranged on each low pressure oil respectively, and the bottom of each pump oil unit is configured with a Rotor block, has the roller that can enter described pump oil unit drives component working indoor in described Rotor block;
Described pump oil unit drives parts are arranged on described pump oil unit drives component working room, these pump oil unit drives parts comprise a camshaft and are disposed on the multiple cams on described camshaft vertically, each cam and the roller contact in the Rotor block in corresponding multiple pump oil unit, by roller driven pump oil cell operation; Camshaft in described pump oil unit drives parts is connected with the actuation gear power of motor.
In a preferred embodiment of the present utility model, the described pump housing is configured with at least one Rotor block oil chamber, at least one Rotor block oil chamber described is communicated with the bottom of a pump chamber, to give described Rotor block supply lubricant oil, described Rotor block oil chamber is configured with grease fitting.
In a preferred embodiment of the present utility model, the described pump housing is configured with at least one cam-position sensor mount inlet, described cam-position sensor mount inlet is connected with described pump oil unit drives component working room, at described cam-position sensor mount inlet, cam position detecting sensor is installed, described cam position detecting sensor is detected and detected signal is delivered to ECU the cam phase in described pump oil unit drives parts, to determine the pump oil moment of cam.
In a preferred embodiment of the present utility model, at least one low pressure grease chamber is provided with a return flow oil pipe joint, with the fuel oil that circulates.
In a preferred embodiment of the present utility model, described camshaft is configured with at least one intermediate bearing, it is indoor that described intermediate bearing is supported on described pump oil unit drives component working.
In a preferred embodiment of the present utility model, the quantity of described cam is 6,8 or 10.
In a preferred embodiment of the present utility model, described cam on described camshaft, wherein has the phase place of two cams identical according to certain phase configuration.
In a preferred embodiment of the present utility model, described cam has three convexs, the formation 120 ° layout of three convexs.
Owing to have employed technological scheme as above, multi-cylinder high-pressure oil feed pump of the present utility model can meet the requirement of high-power diesel generator set fuel delivery completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model multi-cylinder high-pressure oil feed pump.
Fig. 2 is the structural representation of the utility model multi-cylinder high-pressure oil feed pump pump chamber.
Fig. 3 is the structural representation of the utility model multi-cylinder high-pressure oil feed pump (10 cylinder) camshaft.
Fig. 4 is the structural representation of the utility model multi-cylinder high-pressure oil feed pump (8 cylinder) camshaft.
Fig. 5 is the structural representation of the utility model multi-cylinder high-pressure oil feed pump (6 cylinder) camshaft.
Fig. 6 position the utility model multi-cylinder high-pressure oil feed pump working procedure first view.
Fig. 7 is the utility model multi-cylinder high-pressure oil feed pump working procedure second view.
Fig. 8 is the utility model multi-cylinder high-pressure oil feed pump working procedure third state schematic diagram.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See shown in Fig. 1 and Fig. 2, figure for being applied to the one ten cylinder high-pressure fuel-feed pump of high pressure common rail fuel injection system, this ten cylinders high-pressure fuel-feed pump comprises a pump housing 100,10 pumps oil unit 200 and pump oil unit drives parts 300.
The pump housing 100 has 10 pump chambers 110 and pump oil unit drives component working room 120, pump chamber 110 but be not only limited to 10.
Pump oil unit drives component working room 120 is disposed axially in the pump housing 100, and 10 pump chambers 110 are positioned at the top of pump oil unit drives component working room 120 side by side and their bottom is connected with the oily unit drives component working room 120 of pump; The axis of 10 pump chambers 110 is mutually vertical with the axis of pump oil unit drives component working room 120, is provided with a pump oil unit 200 in each pump chamber.
10 low pressure grease chambeies 130 to be coaxially arranged on above pump oil unit drives component working room 120 and to be connected with corresponding pump chamber 110, and 10 their common axis of low pressure grease chamber 130 are mutually vertical with the axis of 10 pump chambers 110 and be parallel to each other with the axis of the oily unit drives component working room 120 of pump.A return flow oil pipe joint 140 is wherein installed in the low pressure grease chamber 130 of the pump housing 100 leftmost side with circulation fuel oil, can certainly selects, in multiple low pressure grease chamber 130, fuel oil inlet connector 150 is installed according to fuel delivery per cycle.
In pump oil unit drives component working room 120 built with pump oil unit drives parts 300, pump oil unit drives parts 300 comprise camshaft 320 and are disposed on ten cams 310 on camshaft 320 vertically, on camshaft 320, be configured with left and right sides bearing 312,313 and two intermediate bearings 311 in addition, left and right sides bearing 312,313 and intermediate bearing 311 play supplemental support effect.
Roller body component lubrication grease chamber 160 is provided with in the middle and lower part of the pump housing 100, this roller body component lubrication grease chamber 160 is communicated with pump chamber 110, in roller body component lubrication grease chamber 160, grease fitting 161 is installed, supplies lubricant oil with lubrication to the roller body parts 410 of motion in pump chamber 110 by grease fitting 161 and roller body component lubrication grease chamber 160.
Roller body parts 410 belong to the part in pump oil unit 200, be positioned at the below of pump oil unit 200, roller 420 in roller body parts 410 contacts with the cam 310 in pump oil unit drives parts, be connected with the actuation gear power of motor by the camshaft 320 in pump oil unit drives parts, driven pump oil unit 200 works.
The bottom pump chamber 110 of the pump housing 100 is provided with a cam-position sensor mount inlet 171, a cam-position sensor 170 is installed in cam-position sensor mount inlet 171, in order to judge the phase place of multiple cam 310 respectively, thus determine the pump oil moment of cam 310.
Because multi-cylinder high-pressure oil feed pump divides by the number of pump chamber 110,8 cylinders, 6 cylinder high-pressure oil feed pump structures are substantially identical with 10 cylinders, just repeat its content no longer in detail at this.
Because Chinese utility model patent CN 102003319 is by fully open for pump oil unit, just repeat its content no longer in detail at this.
Referring to Fig. 3, it is pump oil unit drives parts 300 (being illustrated as 10 cylinders) of multi-cylinder high-pressure oil feed pump shown in figure, this pump oil unit drives parts 300 comprise a camshaft 320 and interval and are arranged on 10 cams 310 (I-Ⅹ) on camshaft 320, camshaft 320 is placed in pump oil unit drives component working room 120 (see Fig. 1), and 10 cams 310 lay respectively at the below of 10 pump chambers 110; Each cam 310 is three operating cams, and three convex into 120 ° of layouts, and the convex of adjacent two cams misplaces 24 °.When the every rotating 360 degrees of camshaft 320, pump oil unit 200 pump oil 3N time (N is the number of cam 310), and the same pump oil moment, two pump oil unit 200 (the pump oil unit as I and VI, II and VII correspondence) pump oil simultaneously, the pump oil process of adjacent two pumps oil unit 200 (the pump oil unit as I and II, V and VI correspondence) may partly overlap, and therefore can meet the requirement of high-power huge discharge generator set fuel delivery.
Referring to Fig. 4, the camshaft 320a in the pump oil unit drives parts 300a corresponding to 8 cylinder high-pressure fuel-feed pumps is provided with 8 cam 310a, and 8 cam 310a are three operating cams, and three convex into 120 ° of layouts, and the convex of adjacent two cam 310a misplaces 30 °.When the every rotating 360 degrees of camshaft 320a, pump oil unit 200 pump oil 3N time (N is the number of cam 310a), and the same pump oil moment, two pump oil unit 200 (the pump oil unit as I and V, II and VI correspondence) pump oil simultaneously, therefore can meet the requirement of high-power huge discharge generator set fuel delivery.
Referring to Fig. 5, the camshaft 320b corresponding to 6 cylinder high-pressure fuel-feed pumps is provided with 6 cam 310b, 8 cam 310b are three operating cams, and three convex into 120 ° of layouts, and the convex of adjacent two cams misplaces 20 °.When the every rotating 360 degrees of camshaft 320b, pump oil unit 200 pump oil 3N time (N is the number of cam 310b), and the pump oil process of adjacent two pumps oil unit 200 (the pump oil unit as I and II, V and VI correspondence) may partly overlap, and therefore can meet the requirement of high-power huge discharge generator set fuel delivery.
For ten cylinders, the working procedure of the utility model multi-cylinder high-pressure oil feed pump is as follows: see Fig. 6, from drive end, camshaft 320 is under the drive of the actuation gear of motor, rotary motion is produced by counterclockwise direction with certain rotating speed, when the cam of two on camshaft 320 310, (position shown in Fig. 3 is for being numbered V, the cam of Ⅹ) on a convex point leave roller 420 gradually, under the effect of piston spring 240, promote plunger 230 thereupon descending, in the descending process of plunger 230, roller 420 is driven to contact with cam 310 all the time by roller body parts 410.In the descending process of plunger 230, ECU 500 controls electromagnet 251 no electric circuit, at this moment controls spool 252 under the effect of electromagnet spring 254, contacts and be in primary importance with adjustment cushion block 256.Now, the sealing cone 252c controlled on spool 252 separates with the sealing cone 217c controlled in spool mounting hole 217, produce gap, and under the back pressure effect of orifice valve 263 fuel oil in orifice valve spring 262 and common rail oil pipe 520 in outlet valve 260, orifice valve sealing cone 263c tightly withstands fuel oil and to portal the outlet of 210a, and namely outlet valve 260 is in closed condition.The fuel oil come from fuel oil hand-hole 218 by annular pressure grease chamber 258, control the sealing cone 252c spool 252 and control gap between the sealing cone 217c in spool mounting hole 217, plunger oilhole 219 enters in the 212a of fuel oil room, enter fuel oil room 212a intermediate fuel oil number depend on the size of plunger 220 diameter and cam 310 lift.
See Fig. 7, camshaft 320 is under the drive of the actuation gear of motor, be rotated further by counterclockwise direction, plunger 230 rises along with the rotation of cam 310, piston spring 240 is compressed gradually, in the process, ECU 500 controls electromagnet 251 no electric circuit, control spool 252 to be still in and the primary importance adjusting cushion block 256 and contact, the sealing cone 252c controlled on spool 252 separates with the sealing cone 217c controlled in spool mounting hole 217, produce gap, and under the back pressure effect of orifice valve 263 fuel oil in orifice valve spring 262 and common rail oil pipe 520 in outlet valve 260, orifice valve sealing cone 263c tightly withstands fuel oil and to portal the outlet of 210a, namely one-way valve 260 is in closed condition.Part fuel oil in the 212a of fuel oil room is back to low pressure grease chamber by oil duct, oilhole and fuel oil hand-hole 218 in the gap between the sealing cone 217c in the sealing cone 252c on plunger oilhole 219, control spool 252 and control spool mounting hole 217, annular pressure grease chamber 258, the oilhole controlled on spool 252, spool portion under the pushing of plunger 230.
See Fig. 8, camshaft 320 is under the drive of the actuation gear of motor, be rotated further by counterclockwise direction, plunger 230 rises along with the rotation of cam 310, piston spring 240 is compressed gradually, in the process, ECU 500 controls electromagnet 251 and is energized, the electromagnetic force produced by armature 253 overcomes the resistance playing electromagnet spring 254 makes control spool 252 to left movement, until the sealing cone 252c controlled on spool 252 contacts with the sealing cone 217c controlled in spool mounting hole 217, now control spool 252 and be in the second place, fuel oil in the 212a of fuel oil room raises in the pushing downforce of plunger 230, when the fuel pressure in the 212a of fuel oil room is greater than the back pressure of fuel oil in the spring force of the orifice valve spring 262 that sealing cone 263c bears and common rail oil pipe 520, orifice valve 263 backs down by fuel oil, fuel oil in the 212a of fuel oil room is by plunger oilhole 219, high-voltage oil cavity 215, fuel oil portals 210a, orifice valve installation cavity, Small Inclined Holes, oil-through hole, fuel oil portals and flows to common rail oil pipe 520.Plunger 230 continues to rise, electromagnet 251 power-off.Now, fuel pressure in the 212a of fuel oil room acts on the right side controlling spool 252, its active force is far longer than the reaction force of electromagnet spring 254, the sealing cone 252c controlled on spool 252 continues to keep closing with the sealing cone 217c controlled in spool mounting hole 217, and fuel oil under high pressure continues to flow to common rail oil pipe 520.When another convex contact on cam 310 is to roller 420, plunger 230 runs to top dead center, and fuel feeding terminates, and under the effect of piston spring 240, plunger 230 is descending, enters next circulation.The energising of electromagnet 251 and power-off time are controlled by ECU 500.Because synchronization has two pump oil unit pump oil simultaneously, and camshaft rotates a circle, each pump oil modular pump oil three times, thus can reduce the fluctuation of common rail pipe internal pressure, ensures that generator set is stable, runs efficiently.
More than show and describe basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model has appending claims and equivalent thereof to define.
Claims (8)
1. be applied to a multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system, comprise the pump housing, multiple pump oil unit and pump oil unit drives parts; It is characterized in that:
There is in the described pump housing multiple pump chamber, multiple low pressure grease chamber and a pump oil unit drives component working room, described pump oil unit drives component working room is disposed axially in the described pump housing, and described multiple pump chamber radial direction is positioned at the top of pump oil unit drives component working room side by side and their bottom is connected with the oily unit drives component working room of described pump; The axis of multiple pump chamber is mutually vertical with the axis of described pump oil unit drives component working room; Described multiple low pressure grease chamber to be coaxially arranged on above described pump oil unit drives component working room and to be connected with corresponding pump chamber, and the axis of their common axis of described multiple low pressure grease chamber and multiple pump chamber is mutually vertical and be parallel to each other with the axis of the oily unit drives component working room of described pump;
It is indoor that multiple pump oil unit is arranged on each low pressure oil respectively, and the bottom of each pump oil unit is configured with a Rotor block, has the roller that can enter described pump oil unit drives component working indoor in described Rotor block;
Described pump oil unit drives parts are arranged on described pump oil unit drives component working room, these pump oil unit drives parts comprise a camshaft and are disposed on the multiple cams on described camshaft vertically, each cam and the roller contact in the Rotor block in corresponding multiple pump oil unit, by roller driven pump oil cell operation; Camshaft in described pump oil unit drives parts is connected with the actuation gear power of motor.
2. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, the described pump housing is configured with at least one Rotor block oil chamber, at least one Rotor block oil chamber described is communicated with the bottom of a pump chamber, to give described Rotor block supply lubricant oil, described Rotor block oil chamber is configured with grease fitting.
3. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, the described pump housing is configured with at least one cam-position sensor mount inlet, described cam-position sensor mount inlet is connected with described pump oil unit drives component working room, at described cam-position sensor mount inlet, cam position detecting sensor is installed, described cam position detecting sensor is detected the cam phase in described pump oil unit drives parts and detected signal is delivered to ECU, to determine the pump oil moment of cam.
4. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, is characterized in that, at least one low pressure grease chamber is provided with a return flow oil pipe joint, with the fuel oil that circulates.
5. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, described camshaft is configured with at least one intermediate bearing, and it is indoor that described intermediate bearing is supported on described pump oil unit drives component working.
6. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, the quantity of described cam is 6,8 or 10.
7. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, described cam on described camshaft, wherein has the phase place of two cams identical according to certain phase configuration.
8. a kind of multi-cylinder high-pressure oil feed pump being applied to high pressure common rail fuel injection system as claimed in claim 1, it is characterized in that, described cam has three convexs, the formation 120 ° layout of three convexs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420857450.8U CN204371540U (en) | 2014-12-30 | 2014-12-30 | A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420857450.8U CN204371540U (en) | 2014-12-30 | 2014-12-30 | A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system |
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| Publication Number | Publication Date |
|---|---|
| CN204371540U true CN204371540U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420857450.8U Expired - Fee Related CN204371540U (en) | 2014-12-30 | 2014-12-30 | A kind of multi-cylinder high-pressure oil feed pump for high pressure common rail fuel injection system |
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| CN (1) | CN204371540U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533680A (en) * | 2014-12-30 | 2015-04-22 | 南岳电控(衡阳)工业技术有限公司 | Multiple-cylinder high pressure fuel feed pump for high pressure common rail fuel injection system |
| CN109611251A (en) * | 2018-10-30 | 2019-04-12 | 中国北方发动机研究所(天津) | A kind of seat ring Split high pressure cam of injection pump axis |
-
2014
- 2014-12-30 CN CN201420857450.8U patent/CN204371540U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533680A (en) * | 2014-12-30 | 2015-04-22 | 南岳电控(衡阳)工业技术有限公司 | Multiple-cylinder high pressure fuel feed pump for high pressure common rail fuel injection system |
| CN109611251A (en) * | 2018-10-30 | 2019-04-12 | 中国北方发动机研究所(天津) | A kind of seat ring Split high pressure cam of injection pump axis |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 421007 Hunan city in Hengyang Province, Yanfeng District Baishazhou box No. 10 Patentee after: The electronic (Hengyang) industrial technology Limited by Share Ltd Address before: 421007 Hunan city in Hengyang Province, Yanfeng District Baishazhou box No. 10 Patentee before: Nanyue Electronic Control (Hengyang) Industry Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20181230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |