CN107148514A - For the method for the suction valve for manipulating energy electricity manipulation - Google Patents
For the method for the suction valve for manipulating energy electricity manipulation Download PDFInfo
- Publication number
- CN107148514A CN107148514A CN201580057414.0A CN201580057414A CN107148514A CN 107148514 A CN107148514 A CN 107148514A CN 201580057414 A CN201580057414 A CN 201580057414A CN 107148514 A CN107148514 A CN 107148514A
- Authority
- CN
- China
- Prior art keywords
- suction valve
- pressure
- parameter
- pressure pump
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to it is a kind of be used to manipulating can electricity manipulation suction valve (1) method, the suction valve is used to adjusting in the fuel injection system of internal combustion engine, the conveying capacity of high-pressure pump (2) especially in common-rail injection system.According to the present invention, at least in internal combustion engine start, the lubricating condition at least one drive mechanism room (3) on high-pressure pump (2) produces the parameter of influence to manipulate suction valve (1).
Description
Technical field
The present invention relates to a kind of method for being used to manipulate the suction valve of energy electricity manipulation, the suction valve is used to adjust internal combustion engine
Fuel injection system in, the conveying capacity of high-pressure pump especially in common-rail injection system.
Background technology
High-pressure pump in fuel injection system, especially in common-rail injection system is used for high-pressure delivery fuel.Therefore, described
High-pressure pump has the pump element that at least one carries high voltage device room, and fuel is compressed in the high voltage device room.With high pressure
The fuel of conveying is then supplied to high-pressure storage by high-pressure outlet, i.e., so-called rail.Then, by being connected to storage of higher pressures
Injection valve on device, fuel under high pressure is injected into the combustion chamber of internal combustion engine.
Generally the high voltage device room of high-pressure pump is filled by suction valve, the suction valve can for example be designed as letter
Single check-valves.For the regulation of the amount of progress, then to a metering units are connect before the suction valve, the metering units make it possible to limit
Fixed fuel quantity is measured.But, the suction valve that can also alternatively use electric to manipulate, which is used to measure, to be adjusted, so as to save
Remove metering units.Here, the suction valve of energy electricity manipulation can be structured as the valve opened during no current or be closed when being configured to no current
The valve of conjunction.In both cases, usual magnestat is acted to the valve member of suction valve, to overcome the spring force of spring
And close or open the suction valve.
Generally by can electricity manipulation suction valve in the following manner come the regulation of the amount of progress, i.e. suction valve high-pressure pump suction
Stage stays open, to make the high voltage device room of high-pressure pump almost be filled with fuel completely.Thus also not to the fuel limited
Amount is measured.This just occurs in subsequent delivery phase, in the delivery phase, and suction valve is always maintained at opening until unnecessary
The fuel of amount is squeezed in the inflow region for returning to high-pressure pump from high voltage device room.During closure of the suction valve during delivery phase
Between point it is thus determined that the conveying capacity of high-pressure pump.
In order to high-pressure delivery fuel, suction valve must be closure because otherwise can not high-pressure pump high voltage device
Pressure is formed in room.The pressure formed when suction valve is closed in high voltage device room make the drive mechanism part of high-pressure pump by
Carry, because these drive mechanism parts must resist the pressure and work.The load can be minimized in the following manner：Make
The fuel of sufficient amount is available for lubricating drive mechanism part.However, according to the corresponding running status of internal combustion engine, such as in internal combustion
Machine rotating speed it is low or restarting in the case of, what this was not always possible to, so that the lubricating condition in the drive mechanism room of high-pressure pump
It is insufficient.External action, such as high external temperature may cause identical result.Consequence is on drive mechanism part
Abrasion increase.
The content of the invention
Therefore, the present invention is based on following task, illustrates a kind of method for being used to manipulate the suction valve of energy electricity manipulation, described to take out
Inhaling valve is used for the conveying capacity of adjusting high-pressure pump, and the suction valve has positive effect to the robustness of high-pressure pump.It should especially lead to
The abrasion crossed in the drive mechanism region of illustrated method reduction high-pressure pump.
The method with claim 1 feature is proposed in order to solve the task.The present invention be advantageously improved scheme by
Dependent claims are learnt.
In the method according to suction valve of the invention, for manipulating energy electricity manipulation proposed, the suction valve use
The conveying capacity of high-pressure pump in the fuel injection system of regulation internal combustion engine, especially in common-rail injection system, at least described interior
When combustion engine starts, the lubricating condition influential parameter of tool at least one drive mechanism room on the high-pressure pump is grasped
Control the suction valve.That is, the parameter is related to the lubricating condition in drive mechanism room, and hence in so that it can carry out
To the analyzing and processing of lubricating condition.Thus, suction valve can according to lubricating condition actual in the drive mechanism room of high-pressure pump come
Manipulation, wherein, the parameter is used as the trigger (Trigger) of manipulation suction valve.
By the control unit being connected with suction valve, suction valve is preferably so manipulated so that the suction valve is in lubricious strip
Stayed open first in the case that part is insufficient, the pressure initiation in high voltage device room to prevent high-pressure pump.If then
The fuel of sufficient amount is available for lubricating drive mechanism part, and this shows further through at least one parameter, then can close and take out
Inhale valve.Therefore, opened when suction valve is configured in no current valve when, magnestat is energized.Therefore, when suction valve structure
When making the valve closed during for no current, terminate the energization of magnestat.
Therefore, it ensure that by the method according to the invention, the lubricating condition quilt in the drive mechanism region of high-pressure pump
Analyze and process for it is abundant when, just carry out pressure initiation in the high voltage device room of high-pressure pump.This especially is the case when, when for
Composite lubricating film in terms of Tectono-fluids power and when the fuel of sufficient amount is there are in drive mechanism room.In terms of fluid dynamic
Composite lubricating film be used for reduce two drive mechanism parts contact area in friction, for example reduce high-pressure pump actuated by cams
Friction between mechanism or the roller and roller seat of eccentric actuation.Significantly reduce drive mechanism part in this way
Abrasion in load and these drive mechanism parts, so that the robustness rise of high-pressure pump.
It has been noted, in the suction valve that manipulation electric can be manipulated, the parameter is used preferably as trigger.This with
Premised on lower, i.e., described parameter allows the lubricating condition being inferred in the drive mechanism room of high-pressure pump.Therefore it will especially can retouch
The characteristic parameter of engine operating conditions is stated, such as rotating speed, the duration of operation or similar characteristics parameter are used as parameter.Replace
For ground or addedly, a kind of characteristic parameter can be used, the characteristic parameter describes the condition in drive mechanism room, such as fuel
Temperature, fuel pressure or similar characteristics parameter.The usual existing corresponding sensing device having for sensing the characteristic parameter,
So as to reference to herein.As long as external action, such as external temperature should be considered when manipulating suction valve, then it is assumed that, also borrow
Help corresponding sensing device to sense these external actions.
In order to ensure only when the lubricating condition in drive mechanism room is abundant, just entering in the high voltage device room of high-pressure pump
Row pressure initiation, moreover, it is proposed that postponing the closure of the suction valve in time in the internal combustion engine start.This has following knot
Really, the pressure initiation in the high voltage device room of high-pressure pump is also delayed in time.During the period, the driving of high-pressure pump
Mechanism chamber can be filled with fuel, so as to there are sufficient lubricating condition in internal combustion engine start.Time delay be preferably 0.1 to
1 second.The period is certified as being enough to set up favourable lubricating condition in the range of experiment.
Proposed in the improvement project of the present invention, when the internal combustion engine stops, the suction valve is opened, so that the height
Pressure in the high voltage device room of press pump is cut down.Pressure in the high voltage device room of high-pressure pump is cut down in the rail to being connected
Pressure is not acted, because high-pressure outlet is generally realized by check-valves, so as to ensure that, in internal combustion engine restarting
When, sufficiently high rail pressure power is available.Pressure abatement in the high voltage device room of high-pressure pump is mainly used in reducing drive mechanism
The load of part.Because when internal combustion engine stops, suction valve is opened, so fuel is pushed back to high-pressure pump from high voltage device room
Inflow region in, until forming pressure balance largely.Because accounting for leading in inflow region mesolow, high pressure
Pressure in element chamber declines.
According to the first preferred embodiment of the present invention, using the suction valve for the valve opened when being configured to no current.With with
Under type carries out the manipulation of suction valve, i.e., always apply manipulation electric current when suction valve should be closed.Therefore, manipulation is passed through
It can determine the closing time point of suction valve.
Alternatively propose, when performing the method according to the invention, use the suction of the valve closed when being configured to no current
Valve.In order to close suction valve, manipulation electric current must be removed.The closing time point of suction valve is now thus can determine again.
With the suction valve using the valve opened when being configured to no current still using the valve closed when being configured to no current
Suction valve is unrelated, and the method according to the invention enables high-pressure pump largely less abrasively to run.Thus, carry
The robustness of high high-pressure pump.Therefore, methods described is particularly suitable for use in fuel injection system, and the fuel injection system is for combustion
Expect critical market and conceive.
In addition, in the case of with the internal combustion engine for starting stopping automatics, can freely apply startup pressure, this is opened
Dynamic pressure is restricted to 300 bars in the case of common-rail high-pressure pump at present.One positive side effect is need not also to maintain temperature again
Degree limitation, the temperature limiting is applied to start at present to stop automatics.It is now recognized that only just permitting when temperature is less than 60 DEG C
Perhaps operation, which starts, stops automatics.
In addition, the method for being used to manipulate suction valve proposed enables internal combustion engine quickly to start, because rail pressure is tried hard to keep
Hold unaffected.Furthermore, it is possible to allow any rail position pressure (Railstanddruck), without damaging possible limiting value.
That is, problem " renitency startup " recedes into the background.
Brief description of the drawings
The present invention is more specifically explained in below according to accompanying drawing.These accompanying drawings are shown：
Fig. 1 has the schematic diagram of the high-pressure fuel pump of the suction valve of energy electricity manipulation, and the suction valve is used for adjusting high-pressure pump
Conveying capacity, and
The curve map of the preferred manipulation of the suction valve for the valve that Fig. 2 is opened for showing to be configured to during no current.
Embodiment
High-pressure pump 2 highly diagrammatically showing in Fig. 1, for common-rail injection system is included with pump piston 5
Pump element, the housing component 7 that the pump piston can be received in high-pressure pump 2 stroke movement for gauge high voltage device room 4
In cylinder holes 6.By the drive mechanism 3 that present construction is cam drive mechanism, pump piston 5 can carry out stroke movement by driving.
In the delivery stroke of pump piston --- during the delivery stroke, the volume in high voltage device room 4 diminishes --- it is present in high pressure
Fuel in element chamber 4 is compressed and is then supplied to high-pressure storage (not shown) by high-pressure outlet 9.Pass through energy electricity
The suction valve 1 of manipulation, is filled with fuel to high voltage device room 4, what the suction valve present construction was opened when being no current
Valve.Suction valve 1, which has, can be adjusted towards the valve tappet 8 opened in the high voltage device room 4 of high-pressure pump 2, the valve tappet by magnetic
Device (not shown) is saved to manipulate.The valve opened during as no current, the magnestat must be energized, to close suction valve 1.
Shown the energization in Fig. 1 by means of arrow 10.
When corresponding to shown in Fig. 2 to be manipulated, the closing time point of suction valve 1 determines the conveying capacity of high-pressure pump 2.
As learnt from Fig. 2, the period (solid line) of the energization is fallen in the delivery phase of high-pressure pump 2.Because taking out
During the energization for inhaling valve 1, pump piston 5 implements a delivery stroke, and in other words, the pump piston is moved to from bottom dead centre (UT)
Dead point (OT) (see dotted line).When the delivery stroke of pump piston 5 starts, suction valve 1 stays open (see chain-dotted line), so as to
Pressure is not formed in high voltage device room 4 (see dotted line).When suction valve 1 is closed, pressure initiation is just carried out.Because this is related to one
The valve opened during no current is planted, is that this suction valve 1 must be energized.Therefore, when the conduction time point of suction valve 1 is closed in other words
Between point determine high-pressure pump 2 conveying capacity.
This make use of proposed the method according to the invention, and its mode is, in time retarded closing time point, so as to
Just allow to form pressure in high voltage device room 4 when ensuring that enough fuel is available for lubrication drive mechanism 3.The time prolongs
Can be late until 1 second, it is thin especially to make it possible to lubrication between the part of drive mechanism 3 in terms of Tectono-fluids power
Film.
Claims (6)
1. the method for the suction valve (1) for manipulating energy electricity manipulation, the suction valve is used for the fuel injection systems for adjusting internal combustion engine
The conveying capacity of high-pressure pump (2) in system, especially in common-rail injection system, it is characterised in that at least in the internal combustion engine start,
Lubricating condition at least one drive mechanism room (3) on the high-pressure pump (2) produces the parameter of influence to manipulate
State suction valve (1).
2. according to the method described in claim 1,
Characterized in that, when manipulating suction valve (1) of the energy electricity manipulation, the parameter is used as trigger, wherein,
It is preferred that the characteristic parameter that will describe the engine operating conditions, such as rotating speed, the duration of operation or similar characteristics parameter are made
Used for parameter, and/or the characteristic parameter of the condition in the drive mechanism room (3), such as fuel temperature, fuel pressure will be described
Power or similar characteristics parameter are used as parameter.
3. method according to claim 1 or 2,
Characterized in that, in the internal combustion engine start, postponing the closure of the suction valve (1) in time and then postponing described
Pressure initiation in the high voltage device room (4) of high-pressure pump (2), wherein, preferably time delay is 0.1 to 1 second.
4. the method according to any one of the preceding claims,
Characterized in that, when the internal combustion engine stops, the suction valve (1) is opened, so that the high pressure member of the high-pressure pump (2)
Pressure abatement in part room (4).
5. the method according to any one of the preceding claims,
Characterized in that, the valve opened during using no current is used as suction valve (1).
6. method according to any one of claim 1 to 4,
Characterized in that, the valve closed during using no current is used as suction valve (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014221674.5A DE102014221674A1 (en) | 2014-10-24 | 2014-10-24 | Method for controlling an electrically controllable suction valve |
| DE102014221674.5 | 2014-10-24 | ||
| PCT/EP2015/073560 WO2016062570A1 (en) | 2014-10-24 | 2015-10-12 | Method for controlling an electrically controllable suction valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107148514A true CN107148514A (en) | 2017-09-08 |
| CN107148514B CN107148514B (en) | 2021-03-02 |
Family
ID=54330747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580057414.0A Active CN107148514B (en) | 2014-10-24 | 2015-10-12 | Method for actuating an electrically actuable suction valve |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3209879B1 (en) |
| KR (1) | KR20170072926A (en) |
| CN (1) | CN107148514B (en) |
| DE (1) | DE102014221674A1 (en) |
| WO (1) | WO2016062570A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595090A (en) * | 2018-12-14 | 2019-04-09 | 重庆军通汽车有限责任公司 | Control system based on smoke generator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3068396B1 (en) * | 2017-06-30 | 2021-11-26 | Continental Automotive France | DIGITAL TYPE HIGH PRESSURE PUMP CONTROL PROCESS |
| DE102019212286A1 (en) * | 2019-08-16 | 2021-02-18 | Robert Bosch Gmbh | Method for operating a high pressure pump, control unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394844A (en) * | 1993-01-08 | 1995-03-07 | Fuji Jukogyo Kabushiki Kaisha | Fuel pressure control method and system for direct fuel injection engine |
| GB2290112A (en) * | 1992-10-15 | 1995-12-13 | Fuji Heavy Ind Ltd | Starting system control method for high pressure fuel injection engine |
| FR2768775A1 (en) * | 1997-09-24 | 1999-03-26 | Siemens Ag | INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING SUCH AN INJECTION SYSTEM |
| CN102102614A (en) * | 2009-12-21 | 2011-06-22 | 福特环球技术公司 | Reducing pressure on common rail with rapid pressure accumulation |
| US20120167859A1 (en) * | 2011-01-04 | 2012-07-05 | Ford Global Technologies, Llc | Fuel system for a multi-fuel engine |
| CN103221678A (en) * | 2010-11-23 | 2013-07-24 | 罗伯特·博世有限公司 | Method for operating a fuel system of an internal combustion engine |
| CN103982304A (en) * | 2013-02-12 | 2014-08-13 | 福特环球技术公司 | Direct injection fuel pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10162988B4 (en) * | 2001-12-20 | 2004-01-15 | Siemens Ag | Device and method for regulating the control valve of a high pressure pump |
| DE102010027745A1 (en) * | 2010-04-14 | 2011-10-20 | Robert Bosch Gmbh | high pressure pump |
| JP5630462B2 (en) * | 2012-06-19 | 2014-11-26 | 株式会社デンソー | Fuel injection control device |
-
2014
- 2014-10-24 DE DE102014221674.5A patent/DE102014221674A1/en not_active Withdrawn
-
2015
- 2015-10-12 EP EP15781621.6A patent/EP3209879B1/en active Active
- 2015-10-12 CN CN201580057414.0A patent/CN107148514B/en active Active
- 2015-10-12 KR KR1020177013602A patent/KR20170072926A/en unknown
- 2015-10-12 WO PCT/EP2015/073560 patent/WO2016062570A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2290112A (en) * | 1992-10-15 | 1995-12-13 | Fuji Heavy Ind Ltd | Starting system control method for high pressure fuel injection engine |
| US5394844A (en) * | 1993-01-08 | 1995-03-07 | Fuji Jukogyo Kabushiki Kaisha | Fuel pressure control method and system for direct fuel injection engine |
| FR2768775A1 (en) * | 1997-09-24 | 1999-03-26 | Siemens Ag | INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING SUCH AN INJECTION SYSTEM |
| CN102102614A (en) * | 2009-12-21 | 2011-06-22 | 福特环球技术公司 | Reducing pressure on common rail with rapid pressure accumulation |
| CN103221678A (en) * | 2010-11-23 | 2013-07-24 | 罗伯特·博世有限公司 | Method for operating a fuel system of an internal combustion engine |
| US20120167859A1 (en) * | 2011-01-04 | 2012-07-05 | Ford Global Technologies, Llc | Fuel system for a multi-fuel engine |
| CN103982304A (en) * | 2013-02-12 | 2014-08-13 | 福特环球技术公司 | Direct injection fuel pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595090A (en) * | 2018-12-14 | 2019-04-09 | 重庆军通汽车有限责任公司 | Control system based on smoke generator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3209879A1 (en) | 2017-08-30 |
| CN107148514B (en) | 2021-03-02 |
| EP3209879B1 (en) | 2020-02-12 |
| DE102014221674A1 (en) | 2016-04-28 |
| KR20170072926A (en) | 2017-06-27 |
| WO2016062570A1 (en) | 2016-04-28 |
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