CN107636294B - Tank ventilation device and method for diagnosing a tank ventilation device - Google Patents
Tank ventilation device and method for diagnosing a tank ventilation device Download PDFInfo
- Publication number
- CN107636294B CN107636294B CN201680030195.1A CN201680030195A CN107636294B CN 107636294 B CN107636294 B CN 107636294B CN 201680030195 A CN201680030195 A CN 201680030195A CN 107636294 B CN107636294 B CN 107636294B
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- China
- Prior art keywords
- pump
- line
- tank ventilation
- ventilation device
- throttle point
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- 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.)
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- 238000009423 ventilation Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 24
- 238000001179 sorption measurement Methods 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 239000002828 fuel tank Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 238000001704 evaporation Methods 0.000 claims abstract description 3
- 238000004590 computer program Methods 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000003745 diagnosis Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0809—Judging failure of purge control system
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/089—Layout of the fuel vapour installation
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0809—Judging failure of purge control system
- F02M25/0818—Judging failure of purge control system having means for pressurising the evaporative emission space
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0872—Details of the fuel vapour pipes or conduits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The invention relates to a tank ventilation device (1) having an adsorption filter (3) for temporarily storing fuel evaporating from a fuel tank (2) and a delivery device arranged in a flow-conducting manner between the adsorption filter (3) and an air supply system (8) of an internal combustion engine (7), wherein the delivery device comprises at least one pump (5), and wherein a throttle point (6) is arranged in a line leading from the at least one pump (5) to the air supply system (8), and at least one bypass line (9) of a defined opening cross section is arranged parallel to the throttle point (6). When the line from the pump (5) to the air supply system (8) via the throttle point (6) is properly fitted, the bypass line (9) is sealed closed; the bypass line (9) is open when a line from the pump (5) to the air supply system (8) via the throttle point (6) is not properly installed.
Description
The invention relates to a tank ventilation device having an adsorption filter and a conveying device, which comprises at least one pump. The invention further relates to a method for diagnosing a tank ventilation system, a computer program which carries out each step of the method according to the invention when the computer program runs on a computer, and a machine-readable storage medium which stores the computer program. Finally, the invention relates to an electronic control unit which is provided for carrying out the method according to the invention.
Background
In the fuel tank of a motor vehicle, volatile substances, essentially hydrocarbons, evaporate depending on the pressure and temperature conditions prevailing in the fuel tank and on the composition of the fuel. For environmental and safety reasons, these substances must be collected and delivered to the engine for combustion. For this purpose, these volatile substances are usually adsorbed and intermediately stored by means of activated carbon filters. For the regeneration of the activated carbon filter, the substances are sucked out by means of a fluid flow and conveyed into an intake manifold arranged upstream of the internal combustion engine for combustion. The suction is effected here by means of the negative pressure occurring in the intake pipe as a result of the throttling of the engine.
DE 102011086946 a1 discloses a venting system for a fuel tank. In the ventilation system for a fuel tank described in this document, which ventilation system has an adsorption filter for temporarily storing fuel evaporating from the fuel tank and a delivery device arranged in a flow-conducting manner between the adsorption filter and an air supply system of the internal combustion engine, the internal combustion engine is a turbocharged engine having a turbocharger unit and a throttle device in the air supply system. The adsorption filter is connected in a flow-conducting manner to the air supply system by means of a first line at a first introduction point arranged upstream of the turbocharger unit and by means of a second line at a second introduction point arranged downstream of the throttle device. A tank ventilation valve is arranged in the second line, and the first line branches off from the second line in front of the tank ventilation valve in the flow direction to the second introduction point. The conveying device is driven by a brushless direct current motor.
Disclosure of Invention
The core of the invention is a tank ventilation device having an adsorption filter and a delivery device which is arranged in a flow-conducting manner between the adsorption filter and an air supply system of an internal combustion engine and comprises at least one pump. Furthermore, a throttle point is located in a line leading from the at least one pump to the air supply system, and at least one bypass line of a defined opening cross section is arranged parallel to the throttle point. When the line from the pump to the air supply system via the throttle point is properly fitted, the bypass line is sealed closed. The bypass line is open when a line from the pump to the air supply system via the throttle point is not properly installed. By means of this bypass line which is assigned to the throttle point and is parallel thereto, it can be easily checked whether the line leading from the at least one pump to the air supply system is sealed closed or open.
The opening cross section of the at least one bypass line is advantageously larger than the maximum opening cross section of the throttle point. With this embodiment, it can be particularly advantageously recognized whether the bypass line is open and thus whether a fault is present.
In one embodiment, the throttle point is formed by a latching valve. In this case too, it can be checked when the valve is completely closed and the line is thus completely closed, whether this line is fitted as intended.
According to an advantageous embodiment, at least one further bypass line of a defined opening cross section is provided in the tank ventilation device. A further line can be fitted to this further bypass line, which leads, for example, from the crankshaft housing ventilation into the air supply system. This additional bypass line is sealed closed when the line from the pump to the air supply system via the throttle point is provided as required and the crankcase ventilation line is provided as required. This additional bypass line is open when the crankcase ventilation line is not properly installed.
In a particularly advantageous manner, the pump of the tank ventilation device can be actuated independently of the rinsing process of the adsorption filter. This means that it is not necessarily necessary to perform a flushing procedure in order to perform a diagnosis of the tank ventilation device.
According to a preferred embodiment of the tank ventilation device, the pump is actuated, in particular, during idling/parking, so that a diagnosis of the tank ventilation device does not have to be carried out during operation of the motor vehicle, which could disturb the driving operation.
In a preferred manner, the actuation of the pump can be adapted to different operating points. This makes it possible to carry out diagnostics of the tank ventilation device particularly advantageously under a wide variety of environmental conditions.
According to one advantageous embodiment, a circuit arrangement is provided which detects the pump motor current and compares it with a pump motor current that can be specified and occurs when the bypass line is open. Furthermore, a signal is generated when the detected pump motor current exceeds a predefined pump motor current. This is particularly advantageous because, by means of the detection of the pump motor current, conclusions can be drawn about the pressure in the system without the need for a pressure sensor.
The method according to the invention for diagnosing a tank ventilation device comprises the following steps: first, it is checked whether the pump is active. It is then checked whether the flushing flow of the pump is within limits that can be predefined. In a next step, the current characteristic of the pump motor is detected. Next, the current characteristic curve of the pump motor was evaluated by: the detected pump current is compared with the pump current occurring when the bypass circuit is open. In a final step of the method, a signal is generated if the detected pump current exceeds a predefined pump current, said signal indicating a line that is not properly installed in the tank ventilation system (line drop). The advantage of this method is that, for example, pressure sensors for evaluating the pressure curve in the tank ventilation system can be dispensed with in this method.
Furthermore, the invention also comprises a computer program which is provided for carrying out each step of the method according to the invention.
The invention also comprises a machine-readable storage medium on which the computer program is stored.
Finally, the invention also includes an electronic control unit in which a circuit arrangement is provided as part of this control unit, or which represents the circuit arrangement itself, or which is provided for carrying out the method according to the invention.
Further advantages and features of the invention emerge from the following description of an embodiment in conjunction with the accompanying drawings. The individual features can be realized in each case individually or in combination.
Drawings
The figures show:
fig. 1 is a schematic illustration of a tank ventilation device of a motor vehicle known from the prior art, with an adsorption filter, a pump and a throttle point, which is located in a line between the pump and an air supply system,
figure 2 is a schematic illustration of a tank ventilation device of a motor vehicle according to the invention,
fig. 3 is a flow chart illustrating the procedure of a method according to the invention for diagnosing an embodiment of the tank ventilation device by means of a pump and a bypass line,
figure 4 is a schematic view of a second embodiment of a tank ventilation device of a motor vehicle according to the invention,
fig. 5 is a schematic view of the second embodiment in fig. 4 in a fault situation, in which the further bypass line is open,
figure 6 is a schematic view of a third embodiment of a tank ventilation device of a motor vehicle according to the invention,
fig. 7 is a schematic illustration of the third embodiment in fig. 6 in a fault situation in which the further bypass line is open.
Detailed Description
Fig. 1 shows a tank ventilation device 1 according to the prior art, which has a fuel tank 2, an adsorption filter 3 and a pump 5, as well as an engine 7 and an air supply system 8. Furthermore, a tank ventilation valve 4 is arranged in the fluid connection between the adsorption filter 2 and the engine 7. A throttle point 6, which in the present case is embodied as a latching valve, is located in the line leading from the pump 5 to the air supply system 8. For tank leakage diagnostics, the latch valve is closed and pressure is built up in the system by means of the pump 5. The pressure build-up lasts longer in an unsealed system than in a sealed system. The pump 5 and the throttle point 6 in the form of a latching valve are controlled by a control device, a control 20, wherein this control takes place bidirectionally, i.e. the control 20 also receives and evaluates feedback from the pump or the latching valve.
Fig. 2 shows a tank ventilation device according to the invention, in which a bypass line 9 having a defined cross section is additionally arranged parallel to the throttle point 6. This bypass line 9 is designed in such a way that it is sealed closed when the line from the pump 5 to the air supply system 8 via the throttle point 6 is properly installed. The bypass line 9 is open when a line from the pump 5 to the air supply system 8 via the throttle point 6 is not properly installed. The actuation of the pump 5 and of the locking valve 6 is in turn effected by the control unit 20. For this purpose, a corresponding circuit arrangement 21 can be provided in the controller 20. However, the controller 20 can also be an engine controller. The method described below can be implemented as a computer program in the controller 20. The computer program can be stored on a machine-readable storage medium and read into the controller 20.
Fig. 3 shows the procedure of an embodiment of a method for diagnosing the tank ventilation device 1 according to a flow chart. First, step 30, it is checked whether the pump 5 is active. Then, step 31, it is checked whether the flushing flow is within limits that can be predefined. The limit is defined by the current curve of the pump 5. This will be explained in detail below. In step 32, the current characteristic of the pump 5 is detected by measuring the current profile of the pump motor. Step 33, the detected current characteristic of the pump 5 is evaluated by: the detected pump motor current is compared with the pump motor current occurring when the bypass line 9 is open. The pressure curve in the tank ventilation system 1 is therefore deduced from the measured current curve. From this, it is possible to draw conclusions about the state of the tank ventilation device 1. In the correct case, the bypass line 9 is closed and a certain pressure corresponding to a certain current of the pump motor occurs when the locking valve 6 is closed and the pump 5 is actuated. When, for example, the line is damaged or falls, a larger cross section is released in the open connection and thus a further current profile is also measured. As soon as a larger released cross section is measured on the modified current curve of the pump 5, a leaking or faulty line is identified. In this case, a signal is generated, step 34, which indicates a line which is not properly installed in the box ventilation device 1.
Fig. 4 shows a second embodiment of a tank ventilation system of a motor vehicle according to the invention, which has a further bypass line 10 for diagnosing a further line 11 leading into the air supply system 8. In this case, the further bypass line 10 is located upstream of the bypass line 9 in the intake direction. The further line 11 is mechanically coupled to this further bypass line 10. The further line 11 extends from the crankshaft housing ventilation (not shown) to the air supply system 8 and opens into this air supply system 8. The further component to be diagnosed can also be checked for its tightness by means of the above-described evaluation of the measured current profile of the pump motor, since here again a larger cross section is released in the potentially defective line 11, which can be detected by the measurably changeable current profile of the pump 5. It is assumed here that the line from the pump 5 to the air supply system 8 via the throttle point 6 is correctly installed.
Fig. 5 shows the second embodiment of the invention from fig. 4 in a fault situation in which the further line 11 is open. As a result of the mechanical coupling of the lines 11 and 10, the further bypass line 10 is also open in the event of a failure of the further line 11.
Fig. 6 shows a third embodiment of the invention. In this case, the further bypass line 10 is implemented differently than in fig. 4. The further bypass line 10 is somewhat branched off from the bypass line 9 at its air supply system-side end and does not end at the air supply system 8 as in fig. 4, but rather runs parallel to the air supply system 8 and ends at the outlet of the further line 11 into the air supply system 8.
Fig. 7 shows the third embodiment from fig. 6 in the event of a fault. The further line 11 is open due to a fault situation and the further bypass line 10 and thus the bypass line 9 are also open due to the further line 11 and the further bypass line 10 being mechanically interconnected.
The method according to the invention for diagnosing the tank ventilation device 1 can be carried out independently of the rinsing process of the adsorption filter 3. The pump 5 can be controlled solely for the purpose of carrying out a diagnosis of the tank ventilation system 1, a certain pressure being built up in the tank ventilation system 1 and this pressure curve being evaluated by means of the current curve of the flushing pump motor.
The pump 5 can also be actuated when the vehicle is stopped, i.e. when the vehicle is stopped or the engine is idling. The method therefore does not have to be carried out during operation of the motor vehicle. Instead, the diagnosis is carried out during the time period in which the motor vehicle is stationary, for example at a traffic light.
It is also possible to operate the pump 5 during idle operation, i.e. after the motor vehicle has been stopped and turned off, the pump 5 in this case delivering in the direction of the tank 2.
The diagnosis of the tank ventilation system 1 can be configured independently of the engine operating point or engine operation, whereby it is possible to adapt the actuation of the pump 5 to different engine operating points.
Claims (12)
1. Tank ventilation (1) having an adsorption filter (3) for temporarily storing fuel evaporating from a fuel tank (2) and a delivery device arranged in a flow-conducting manner between the adsorption filter (3) and an air supply system (8) of an internal combustion engine (7), comprising at least one pump (5), characterized in that a throttle point (6) is arranged in a line leading from the at least one pump (5) to the air supply system (8) and in that at least one bypass line (9) of defined opening cross section is arranged parallel to the throttle point (6), which is sealed closed when a line passing through the throttle point (6) from the pump (5) to the air supply system (8) is fitted in a defined manner; the bypass line is open when a line from the pump (5) to the air supply system (8) via the throttle point (6) is not properly installed, wherein the bypass line is arranged downstream of the pump.
2. Tank ventilation device (1) according to claim 1, characterized in that the opening cross section of the at least one bypass line (9) is larger than the opening cross section of the throttle point (6).
3. Tank ventilation device (1) according to claim 1 or 2, characterized in that the throttle point (6) is constituted by a latch valve.
4. Tank ventilation device (1) according to claim 1 or 2, characterized in that at least one further bypass line (10) of defined opening cross section is provided, which is sealed closed when the line from the pump (5) to the air inlet system (8) through the throttle point (6) is fitted as specified and the crankshaft housing ventilation line (11) is fitted as specified; when the crankcase ventilation line (11) is not properly installed, the additional bypass line is open.
5. Tank ventilation device (1) according to claim 1 or 2, characterized in that the pump (5) can be operated independently of the flushing process of the adsorption filter (3).
6. Tank ventilation device (1) according to claim 5, characterized in that the pump (5) is operated at idle/stop.
7. Tank ventilation device (1) according to claim 5, characterized in that the operation of the pump (5) can be adapted to different operating points.
8. Tank ventilation device (1) according to claim 1 or 2, characterized in that a circuit arrangement (21) is provided which detects the pump motor current and compares it with a predefined pump motor current which occurs when the bypass line (9) is open and generates a signal when the detected pump motor current exceeds the predefined pump motor current.
9. Method for diagnosing a tank ventilation device (1) according to any one of claims 1 to 8, characterized by the following steps:
a. checking (30) whether the pump (5) is active;
b. checking whether the flushing flow of the pump (5) is within limits that can be predefined (31);
c. detecting a current characteristic of a motor (32) of the pump (5);
d. evaluating a current characteristic of a motor (32) of the pump (5) by: comparing the detected pump motor current with a pump motor current occurring when the bypass circuit is open;
e. if the detected pump motor current exceeds a predefined pump motor current, a signal (34) is generated, which indicates that the line is not properly installed.
10. A machine-readable storage medium, on which a computer program is stored, which computer program is arranged to carry out each step of the method according to claim 9.
11. An electronic controller (20) arranged for carrying out the method according to claim 9.
12. The electronic controller (20) of claim 11, in which the circuit arrangement (21) forms at least a part of the electronic controller (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015209651.3 | 2015-05-27 | ||
| DE102015209651.3A DE102015209651B4 (en) | 2015-05-27 | 2015-05-27 | Tank ventilation system and method for diagnosing a tank ventilation system |
| PCT/EP2016/061796 WO2016189030A1 (en) | 2015-05-27 | 2016-05-25 | Tank ventilation system and method for diagnosing a tank ventilation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107636294A CN107636294A (en) | 2018-01-26 |
| CN107636294B true CN107636294B (en) | 2020-07-31 |
Family
ID=56097090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680030195.1A Active CN107636294B (en) | 2015-05-27 | 2016-05-25 | Tank ventilation device and method for diagnosing a tank ventilation device |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20180011818A (en) |
| CN (1) | CN107636294B (en) |
| DE (1) | DE102015209651B4 (en) |
| WO (1) | WO2016189030A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016225206A1 (en) * | 2016-12-15 | 2018-06-21 | Volkswagen Aktiengesellschaft | Method for testing the tightness of a fuel tank system of an internal combustion engine |
| DE102018104622A1 (en) | 2018-02-28 | 2019-08-29 | Volkswagen Aktiengesellschaft | Method for venting a fuel tank system of an internal combustion engine based on the measurement signal of a lambda sensor |
| DE102018215280B4 (en) | 2018-09-07 | 2023-03-16 | Volkswagen Aktiengesellschaft | Arrangement of a fluid-carrying element directly or indirectly on a housing of a compressor |
| DE102018215648A1 (en) | 2018-09-14 | 2020-03-19 | Volkswagen Aktiengesellschaft | Internal combustion engine with a valve and a fluid-carrying component and method for monitoring a connection between a valve in a tank ventilation line and a fluid-carrying component |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2037068C1 (en) * | 1991-06-03 | 1995-06-09 | Акционерное общество "Ковровский экскаваторный завод" | Fuel system for diesel |
| DE19831188C2 (en) * | 1998-07-11 | 2003-05-08 | Freudenberg Carl Kg | Tank ventilation device for motor vehicles |
| DE10006185C1 (en) | 2000-02-11 | 2001-06-13 | Bosch Gmbh Robert | Seal testing method for automobile fuel tank system has measurement interval extended when leak is indicated for verification before leakage signal is supplied |
| JP2007211611A (en) * | 2006-02-07 | 2007-08-23 | Denso Corp | Fuel vapor processing device of internal combustion engine |
| DE102010012913A1 (en) | 2010-03-26 | 2011-09-29 | Daimler Ag | On-board diagnostic apparatus for use in air circulation device of motor car for recognition of incorrect assembly of vent lines, has line opened and closed during incorrect assembly and correct assembly of connection unit, respectively |
| DE102010064240A1 (en) * | 2010-12-28 | 2012-06-28 | Robert Bosch Gmbh | Device for selectively regenerating or performing a tank leak diagnosis of a tank ventilation system |
| DE102010064239A1 (en) | 2010-12-28 | 2012-06-28 | Robert Bosch Gmbh | Venting system, in particular for a fuel tank |
| DE102011086946A1 (en) | 2011-08-18 | 2013-02-21 | Robert Bosch Gmbh | Venting system for a fuel tank |
-
2015
- 2015-05-27 DE DE102015209651.3A patent/DE102015209651B4/en active Active
-
2016
- 2016-05-25 WO PCT/EP2016/061796 patent/WO2016189030A1/en active Application Filing
- 2016-05-25 KR KR1020177037282A patent/KR20180011818A/en unknown
- 2016-05-25 CN CN201680030195.1A patent/CN107636294B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20180011818A (en) | 2018-02-02 |
| DE102015209651A1 (en) | 2016-12-01 |
| DE102015209651B4 (en) | 2022-08-18 |
| WO2016189030A1 (en) | 2016-12-01 |
| CN107636294A (en) | 2018-01-26 |
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