CN110360347A - A kind of intermediate loop energy-saving machine oil control valve - Google Patents
A kind of intermediate loop energy-saving machine oil control valve Download PDFInfo
- Publication number
- CN110360347A CN110360347A CN201910739916.1A CN201910739916A CN110360347A CN 110360347 A CN110360347 A CN 110360347A CN 201910739916 A CN201910739916 A CN 201910739916A CN 110360347 A CN110360347 A CN 110360347A
- Authority
- CN
- China
- Prior art keywords
- piston
- valve
- machine oil
- oil control
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000010721 machine oil Substances 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 239000010705 motor oil Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- 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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34426—Oil control valves
Abstract
The present invention provides a kind of intermediate loop energy-saving machine oil control valve, including valve shell and piston, the first working interface is respectively formed on the valve shell, second working interface, opposite sliding matching structure is formed between the piston and valve shell, and intermediate flow channel is formed between piston and valve shell, the first logical hydraulic fluid port is respectively formed on the piston, second logical hydraulic fluid port, first check valve is installed in the hollow cavity of piston, the piston is in relative to valve shell sliding process, first working interface, intermediate flow channel, first check valve, second logical hydraulic fluid port is sequentially communicated, or, second working interface, intermediate flow channel, first check valve, first logical hydraulic fluid port is sequentially communicated.The present invention can efficiently reduce the consumption of fluid medium, when being applied to variable valve timing regulating system, moreover it is possible to be improved its phase adjusted speed.
Description
Technical field
The present invention relates to OCV Oil Control Valve field of structural design, control more particularly, to a kind of intermediate loop energy-saving engine oil
Valve.
Background technique
Variable valve timing regulation technology refers under specific engine operating condition, by controlling internal combustion engine inlet and outlet door
On the opportunity of opening angle, change the size of inlet and outlet door angle overlap, increases charge and efficiency, preferably group to realize
Intake swirl is knitted, cylinder-firing pressure and residual waste gas quantity, the final power for obtaining engine, torque, discharge, fuel oil warp are adjusted
The improved combination properties such as Ji property.
Variable valve timing regulating system common at present mainly uses oil pump to OCV Oil Control Valve output oil pressure for driving
Power works, and the structure of OCV Oil Control Valve therein is more complicated, the dependency degree height of fluid medium pressure (oil pressure), oil consumption
Amount is big, to propose higher oil pressure and pump oil amount demand to engine oil pumping system, causes engine system structure more multiple
It is miscellaneous, moreover, lubricating oil leakage must also be compensated by high driving oil pressure ratio；Especially under the conditions of worst cold case, due to machine oil
Viscosity is high, causes the response speed of variable valve timing regulating system relatively low.
Summary of the invention
The technical problem to be solved by the present invention is in view of the problems of the existing technology, providing a kind of intermediate loop energy conservation
Type OCV Oil Control Valve reduces the consumption of fluid medium.
The technical problem to be solved in the present invention is realized using following technical scheme: a kind of intermediate loop energy-saving engine oil control
Valve processed, including valve shell and piston are respectively formed the first working interface, the second working interface on the valve shell, described
Opposite sliding matching structure is formed between piston and valve shell and intermediate flow channel is formed between piston and valve shell, it is described
It is respectively formed the first logical hydraulic fluid port, the second logical hydraulic fluid port on piston, the first check valve, the piston are installed in the hollow cavity of piston
In relative to valve shell sliding process, first working interface, intermediate flow channel, the first check valve, the second logical hydraulic fluid port according to
Secondary connection, alternatively, second working interface, intermediate flow channel, the first check valve, the first logical hydraulic fluid port are sequentially communicated.
Preferably, first check valve is fixedly mounted on mandrel, and the mandrel is fixedly connected in piston
In empty inner cavity.
Preferably, positioning convex platform is formed on the mandrel, first check valve is fixedly mounted by positioning convex platform
On mandrel.
It preferably, is integrated molding structure between the positioning convex platform and mandrel.
Preferably, it is formed a fixed connection structure between the mandrel and piston with interference fit type.
Preferably, the H-shaped structure of the cross sectional shape of the mandrel forms the peace of the first check valve between mandrel and piston
Fill space.
Preferably, second one-way valve is installed in the hollow cavity of the valve shell, forms oil inlet on the valve shell,
The oil inlet is connected to by second one-way valve with the second logical hydraulic fluid port.
Preferably, baffle ring is set in the inner cavity of the valve shell, cunning of the piston relative to valve shell is limited by baffle ring
Dynamic stroke.
Preferably, it is fixedly connected with spring base in the inner cavity of the valve shell, is arranged between spring base and valve shell and resets
Spring.
Preferably, it is formed a fixed connection structure between the spring base and valve shell with interference fit type.
Compared with prior art, the beneficial effects of the present invention are: due between piston and valve shell formed intermediate flow channel,
It is respectively formed the first logical hydraulic fluid port, the second logical hydraulic fluid port on piston, and the first check valve is installed in the hollow cavity of piston, passes through
Piston slides axially relative to valve shell and matches with the first check valve, changes flowing to path, going forward side by side for fluid media (medium) with this
Row traffic organising, and then it is sequentially communicated the first working interface, intermediate flow channel, the first check valve, the second logical hydraulic fluid port, or make
Two working interfaces, intermediate flow channel, the first check valve, the first logical hydraulic fluid port are sequentially communicated, and are situated between it is possible thereby to efficiently reduce to fluid
The consumption of matter；In addition, can also improve variable valve timing when the present invention is applied to variable valve timing regulating system and adjust system
The phase adjusted speed of system.
Detailed description of the invention
Fig. 1 is a kind of organigram (operating mode 1) of intermediate loop energy-saving machine oil control valve of the present invention.
Fig. 2 is a kind of organigram (operating mode 2) of intermediate loop energy-saving machine oil control valve of the present invention.
Fig. 3 is the work that a kind of intermediate loop energy-saving machine oil control valve of the present invention is applied to variable valve timing regulating system
Make schematic illustration.
Component token name claims in figure: 1- baffle ring, 2- mandrel, 3- valve shell, 4- piston, the first check valve of 5-, and 6- second is single
To valve, 7- strainer, 8- reset spring, 9- spring base, 10- intermediate flow channel, 11- stator, 12- lags chamber, and 13- shifts to an earlier date chamber, and 14- turns
Blades, 21- positioning convex platform, 31- cool down mouth, the first working interface of 32-, 33- oil inlet, the second working interface of 34-, 41-
One logical hydraulic fluid port, 42- second lead to hydraulic fluid port.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation
The present invention is described in detail for example.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Intermediate loop energy-saving machine oil control valve as shown in Figure 1 and Figure 2, it is described mainly including valve shell 3 and piston 4
Valve shell 3, piston 4 are hollow cavity structure, and mouth 31 of cooling down, the first working interface 32, oil inlet are respectively formed on valve shell 3
Mouthfuls 33 and second working interface 34, second one-way valve 6 is installed in the hollow cavity of the valve shell 3, is entered in the end of valve shell 3
Strainer 7 is fixedly connected at mouthful.The first logical hydraulic fluid port 41, the second logical hydraulic fluid port 42 are respectively formed on piston 4, and in the hollow of piston 4
First check valve 5 is installed in inner cavity；The piston 4 is movably arranged in the hollow cavity of valve shell 3 and outside piston 4 and valve
Opposite sliding matching structure is formed between shell 3, and intermediate flow channel 10 is formed between piston 4 and valve shell 3.The valve shell 3
It is fixedly connected with spring base 9 in inner cavity, reset spring 8 is set between spring base 9 and valve shell 3, it, can be with by reset spring 8
Reset power is provided for the axially reciprocating of piston 4.In general, preferably with interference between the spring base 9 and valve shell 3
Fit system forms a fixed connection structure.
When piston 4 is in axial sliding relative to valve shell 3, the oil inlet 33 can pass through second one-way valve 6 and
Two-way hydraulic fluid port 42 is connected to, first working interface 32, intermediate flow channel 10, the first check valve 5, can between the second logical hydraulic fluid port 42
To be sequentially communicated, alternatively, between second working interface 34, intermediate flow channel 10, the first check valve 5, the first logical hydraulic fluid port 41
It can be sequentially communicated.The mouth 31 of cooling down is connected to 4 end face of piston, so as to piston 4 move when cooled down, draining.For
It prevents piston 4 from deviating from 3 inner cavity of valve shell, baffle ring 1 can be set in the inner cavity of valve shell 3, and limit work by baffle ring 1
Sliding stroke of the plug 4 relative to valve shell 3.
The assembling work of first check valve 5 for convenience, and guarantee the functional reliability of the first check valve 5, it can be by the
One check valve 5 is fixedly mounted on mandrel 2, and the mandrel 2 is fixedly connected in the hollow cavity of piston 4.In order to make machine oil
The structure of control valve is more compact, and the cross sectional shape of the mandrel 2 can be designed to H-shaped structure, and mandrel 2 and piston 4 it
Between form the installation space of the first check valve 5.Further, positioning convex platform 21 can also be formed on mandrel 2, described first
Check valve 5 is fixedly mounted on mandrel 2 by positioning convex platform 21.In general, preferably being adopted between the positioning convex platform 21 and mandrel 2
With integrated molding structure, preferably formed a fixed connection structure with interference fit type between the mandrel 2 and piston 4.
Present invention can apply in variable valve timing regulating system, working principle is as shown in Figure 3.Specifically, pass through
The hollow cavity of stator 11 is separated into lag chamber 12 and chamber 13 in advance by the rotor blade 14 of phaser, the lag chamber 12 and
Second working interface 34 is connected to and chamber 13 is connected to the first working interface 32 in advance, when piston 4 makees axial direction relative to valve shell 3
When sliding, following 2 kinds of operating modes can be formed:
Operating mode 1: hydraulic when the fluid media (medium) in oil inlet 33 in piston 4 relative in 3 sliding process of valve shell
When power opens second one-way valve 6, the first check valve 5 successively, the oil inlet 33, second one-way valve 6, the second logical hydraulic fluid port
42, the first check valve 5, the first logical hydraulic fluid port 41, be sequentially communicated and form fluid channel between the first working interface 32, meanwhile, institute
The second working interface 34 for stating, intermediate flow channel 10, the first check valve 5, the first logical hydraulic fluid port 41, between the first working interface 32 also according to
It is secondary connection and form fluid channel, as shown in Figure 1, Figure 3.
Operating mode 2: hydraulic when the fluid media (medium) in oil inlet 33 in piston 4 relative in 3 sliding process of valve shell
When power opens second one-way valve 6, the hydraulic coupling of fluid media (medium) in the first working interface 32 opens the first check valve 5, institute
The first working interface 32 for stating, intermediate flow channel 10, the first check valve 5, the second logical hydraulic fluid port 42, between the second working interface 34 successively
Be connected to and form fluid channel, meanwhile, the oil inlet 33, second one-way valve 6, be sequentially communicated between the second logical hydraulic fluid port 42 and
Fluid channel is formed, as shown in Figure 2.
The present invention makees axial reciprocating sliding relative to valve shell 3 by piston 4 and matches with the first check valve 5, with this
Change flowing to path and carrying out traffic organising for fluid media (medium), so that 2 kinds of above-mentioned Working moulds may be implemented in the present invention
Formula, to effectively reduce the consumption of fluid medium；When it is applied to variable valve timing regulating system, by upper
The 2 kinds of operating modes stated, can also improve the phase adjusted speed of variable valve timing regulating system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of intermediate loop energy-saving machine oil control valve, including valve shell (3) and piston (4), on the valve shell (3) point
The first working interface (32), the second working interface (34) are not formed, are formed between the piston (4) and valve shell (3) opposite
Sliding matching structure and formation intermediate flow channel (10) between piston (4) and valve shell (3), it is characterised in that: the piston
(4) it is respectively formed the first logical hydraulic fluid port (41), the second logical hydraulic fluid port (42) on, it is unidirectional that first is installed in the hollow cavity of piston (4)
Valve (5), the piston (4) is in relative to valve shell (3) sliding process, first working interface (32), intermediate flow channel
(10), the first check valve (5), the second logical hydraulic fluid port (42) are sequentially communicated, alternatively, second working interface (34), intermediate flow
Road (10), the first check valve (5), the first logical hydraulic fluid port (41) are sequentially communicated.
2. a kind of intermediate loop energy-saving machine oil control valve according to claim 1, it is characterised in that: described first is single
It is fixedly mounted on mandrel (2) to valve (5), the mandrel (2) is fixedly connected in the hollow cavity of piston (4).
3. a kind of intermediate loop energy-saving machine oil control valve according to claim 2, it is characterised in that: the mandrel
(2) it is formed on positioning convex platform (21), first check valve (5) is fixedly mounted on mandrel (2) by positioning convex platform (21).
4. a kind of intermediate loop energy-saving machine oil control valve according to claim 3, it is characterised in that: the convex
It is integrated molding structure between platform (21) and mandrel (2).
5. a kind of intermediate loop energy-saving machine oil control valve according to claim 2, it is characterised in that: the mandrel
(2) it is formed a fixed connection structure between piston (4) with interference fit type.
6. a kind of intermediate loop energy-saving machine oil control valve according to claim 2, it is characterised in that: the mandrel (2)
The H-shaped structure of cross sectional shape, the installation space of the first check valve (5) is formed between mandrel (2) and piston (4).
7. a kind of intermediate loop energy-saving machine oil control valve according to claim 1-6, it is characterised in that: described
Second one-way valve (6) are installed in the hollow cavity of valve shell (3), are formed oil inlet (33) on the valve shell (3), it is described
Oil inlet (33) is connected to by second one-way valve (6) with the second logical hydraulic fluid port (42).
8. a kind of intermediate loop energy-saving machine oil control valve according to claim 1-6, it is characterised in that: described
Baffle ring (1) is set in the inner cavity of valve shell (3), sliding row of the piston (4) relative to valve shell (3) is limited by baffle ring (1)
Journey.
9. a kind of intermediate loop energy-saving machine oil control valve according to claim 1-6, it is characterised in that: described
It is fixedly connected with spring base (9) in the inner cavity of valve shell (3), reset spring (8) are set between spring base (9) and valve shell (3).
10. a kind of intermediate loop energy-saving machine oil control valve according to claim 9, it is characterised in that: the spring
It is formed a fixed connection structure between seat (9) and valve shell (3) with interference fit type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739916.1A CN110360347A (en) | 2019-08-12 | 2019-08-12 | A kind of intermediate loop energy-saving machine oil control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739916.1A CN110360347A (en) | 2019-08-12 | 2019-08-12 | A kind of intermediate loop energy-saving machine oil control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110360347A true CN110360347A (en) | 2019-10-22 |
Family
ID=68223751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910739916.1A Withdrawn CN110360347A (en) | 2019-08-12 | 2019-08-12 | A kind of intermediate loop energy-saving machine oil control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110360347A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11193400B2 (en) | 2020-04-29 | 2021-12-07 | Schaeffler Technologies AG & Co. KG | Pressurized oil reservoir for camshaft phaser |
| WO2022016449A1 (en) * | 2020-07-23 | 2022-01-27 | 舍弗勒技术股份两合公司 | Check valve and central valve |
| CN114076008A (en) * | 2021-12-02 | 2022-02-22 | 杰锋汽车动力系统股份有限公司 | Engine VVT system engine oil control valve and control method thereof |
| US11560813B2 (en) | 2021-03-18 | 2023-01-24 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
| US11560814B1 (en) | 2022-01-21 | 2023-01-24 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
| US11753969B2 (en) | 2020-01-09 | 2023-09-12 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
-
2019
- 2019-08-12 CN CN201910739916.1A patent/CN110360347A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11753969B2 (en) | 2020-01-09 | 2023-09-12 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
| US11193400B2 (en) | 2020-04-29 | 2021-12-07 | Schaeffler Technologies AG & Co. KG | Pressurized oil reservoir for camshaft phaser |
| WO2022016449A1 (en) * | 2020-07-23 | 2022-01-27 | 舍弗勒技术股份两合公司 | Check valve and central valve |
| CN115279996A (en) * | 2020-07-23 | 2022-11-01 | 舍弗勒技术股份两合公司 | Check valve and center valve |
| US11560813B2 (en) | 2021-03-18 | 2023-01-24 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
| CN114076008A (en) * | 2021-12-02 | 2022-02-22 | 杰锋汽车动力系统股份有限公司 | Engine VVT system engine oil control valve and control method thereof |
| US11560814B1 (en) | 2022-01-21 | 2023-01-24 | Schaeffler Technologies AG & Co. KG | Recirculating hydraulic fluid control valve |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province Applicant after: Fulin Precision Co.,Ltd. Address before: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province Applicant before: Mianyang Fulin Jinggong Co.,Ltd. Country or region before: China Country or region after: China Address after: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province Applicant after: Mianyang Fulin Jinggong Co.,Ltd. Address before: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province Applicant before: MIANYANG FULIN PRECISION MACHINING Co.,Ltd. Country or region before: China |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191022 |