EP4330536A1 - Dichtheitsprüfung und komponentenprüfung eines tanksystems - Google Patents
Dichtheitsprüfung und komponentenprüfung eines tanksystemsInfo
- Publication number
- EP4330536A1 EP4330536A1 EP22709711.0A EP22709711A EP4330536A1 EP 4330536 A1 EP4330536 A1 EP 4330536A1 EP 22709711 A EP22709711 A EP 22709711A EP 4330536 A1 EP4330536 A1 EP 4330536A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- chamber
- pressure sensor
- chambers
- detected
- 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- Withdrawn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
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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
- F02M37/0094—Saddle tanks; Tanks having partition walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
-
- 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
- G01M3/025—Details with respect to the testing of engines or engine parts
-
- 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
- G01M3/32—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 for containers, e.g. radiators
- G01M3/3236—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 for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—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 for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
- B60K2015/03138—Pumping means between the compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/306—Pressure sensors
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
Definitions
- the invention relates to a method for leak testing and component testing of a tank system with a tank for holding liquid fuel, such a tank system with a control unit for leak testing and component testing of the tank system, and a vehicle with such a tank system.
- Vehicle internal combustion engines typically run on liquid fuel such as gasoline.
- the liquid fuel is carried in a tank and fed to the internal combustion engine in a petrol line.
- both the tank and the components located between the tank and the internal combustion engine are tight, i. H. not only keep the liquid fuel, but also not release fuel vapors such as gasoline vapors into the environment of the vehicle.
- Canisters are therefore known in the prior art, in particular activated carbon canisters, which are typically arranged between the tank and the internal combustion engine and are designed to absorb fuel vapors, which in turn can be fed to the internal combustion engine as fuel in certain situations, especially in gaseous form.
- US 2014 0107906 A1 describes such a canister in a tank system. Furthermore, a two-part tank is described with a first and a second chamber, both of which can be closed in a pressure-tight manner, with liquid fuel being pumped between the chambers by means of a pump for leak testing, in order to artificially increase the pressure in one chamber and in the other Chamber to reduce the pressure in the opposite direction. However, this does not check the function of the components used for this.
- a first aspect of the invention relates to a method for leak testing and component Technical testing of a tank system with a tank for holding liquid fuel, the tank having a first chamber with a first pressure sensor and a second chamber with a second pressure sensor, and the chambers being connected by a transfer valve and by a pump connection, with a pump on the pump connection is used to pump liquid fuel between the chambers, where at least one of the chambers is connected to an outlet with an external valve, in order to remove and/or fill liquid fuel into the tank, comprising the steps:
- the first chamber and the second chamber are thus in principle connected to one another by two channels: on the one hand, the pump connection, which can be considered fluid-tight when the pump is at a standstill, and on the other hand, through the passage valve, which is designed in particular as a lockable hose or pipe connection. Both the pump and the passage valve can preferably be activated or opened or closed by actuating a control unit.
- the liquid propellant can be moved between the first chamber and the second chamber through these channels.
- the liquid fuel is preferably gasoline or another hydrocarbon-based fuel.
- the fuel is pumped from the first chamber into the second chamber by means of the pump, which is preferably controlled accordingly by the control unit.
- the Pump can be the system pump that provides fuel pressure to the internal combustion engine during normal operation, outside of diagnostic mode. This means that no separate diagnostic pump is required.
- the pump can be a piston-cylinder-based pump or a turbo pump, or a vane pump, or any other pump. Before this pumping over occurs, there is advantageously such a level of liquid fuel in the first chamber and in the second chamber that there is sufficient volume of air in the second chamber to be compressed so that fuel is pumped from the first chamber to the second chamber can be.
- Further components of the tank system can be arranged between the outer valve and the respective chamber.
- the first pressure sensor and the second pressure sensor are advantageously always above a level of a respective chamber, so that they are never immersed in the liquid fuel. This advantageously facilitates the pressure measurement, since no hydrostatic pressure acts on a respective pressure sensor due to the liquid fuel.
- the components tested during the component test serve in particular to carry out the leak test of the tank system.
- By checking whether the pressure difference between the chambers decreases after the passage valve has opened it can be checked whether the passage valve has opened correctly.
- By checking whether the pressure in the first chamber and the pressure in the second chamber completely equalize over a long period of time it is possible to check whether, firstly, the flow control valve has opened correctly and, secondly, whether the pressure sensors are working correctly If the pressure drops sufficiently quickly, it can be assumed that the gate valve is functioning correctly, but if the pressures do not equalize over the long term, defective pressure sensors can be assumed, since a constant, stationary offset occurs, which should not occur when the gate valve is correctly open.
- the passage valve before fuel is pumped from the first chamber into the second chamber, the passage valve is opened without the pump being active, so that the same level of fuel and the same pressure distribution over the first chamber and in the second chamber the height of the chambers prevails, with the pressure recorded by the first pressure sensor and the pressure measured by the second pressure sensor being compared and, if there is a deviation, a fault in the passage valve or in the first and/or second pressure sensor is detected.
- the two chambers before pumping over, the two chambers are in communication with one another and are in equilibrium with one another when the passage valve is correctly open. If a different result is detected due to a deviation between the measurement of the first pressure sensor and the measurement of the second pressure sensor, it can be concluded that either the through-flow valve is still closed by mistake or one of the pressure sensors is delivering incorrect results.
- a pressure increase during the specified period of time in the first chamber and a pressure drop during the specified period of time in the second chamber compared with a respective limit value and the respective pressure is regarded as constant if the respective limit value is not exceeded.
- a leak is detected in one of the chambers when the limit value for one of the chambers is fallen below and when the limit value for the other chamber is exceeded, and when the limit values for both chambers are simultaneously exceeded, a defect in the passage valve is detected.
- the origin of a defect can advantageously be determined, since in the first case, when one limit value is complied with but not complied with for the other chamber, the chamber with the non-compliance limit value is obviously defective. If both limit values are exceeded at the same time, it can be assumed that there is a defect in the passage valve.
- a pressure difference is determined at the first pressure sensor with regard to the points in time before and after pumping over and from this a theoretical pressure difference is determined at the second pressure sensor with regard to the same points in time and compared with the actual pressure difference determined by the second pressure sensor with regard to the same points in time.
- a pressure difference is determined at the second pressure sensor with regard to the points in time before and after pumping over, and from this a theoretical pressure difference is determined at the first pressure sensor with regard to the same points in time and compared with the actual pressure difference determined by the first pressure sensor with regard to the same points in time.
- thermodynamic model for pressure increase through volume reduction assume that the liquid fuel is incompressible, while the remaining air in the respective chamber is compressible. According to these specific embodiments, a defect in at least one of the pressure sensors can be inferred.
- a check is made based on a pressure detected at the first pressure sensor and/or a pressure detected at the second pressure sensor as to whether the pressure difference between the chambers is decreasing sufficiently quickly.
- empirical or theoretically determined values are stored in a control unit, which are compared with the pressure profile over time in the chambers.
- the pressure reduction occurs in particular in a non-linear manner, that is to say faster with higher pressure differences than with lower pressure differences, so that the initial pressure difference is taken into account when checking the rate of reduction of the pressure difference. If the reduction in pressure difference does not occur as quickly as expected when the flow control valve is supposed to be open, it can be concluded that the flow control valve is defective, for example, it is not fully open.
- an open passage valve and/or a defective pump is detected if, after the pumping has stopped, the pressure detected by the first pressure sensor and the pressure detected by the second pressure sensor are the same.
- the method steps are repeated several times.
- the method also has the step:
- the pressure detected by the first pressure sensor is equal to the pressure detected by the second pressure sensor and is equal to the atmospheric pressure of the area surrounding the tank system.
- a further aspect of the invention relates to a vehicle with a tank system as described above and below.
- Fig. 2 A method for leak testing and component testing of the tank system from Fig. 1.
- Fig. 1 shows a tank system 1 with a tank, the tank serving to hold liquid fuel and having a first chamber 3 with a first pressure sensor 7 and a second chamber 5 with a second pressure sensor 9 .
- Each chamber in the tank is one-third filled with liquid fuel such as gasoline.
- the chambers 3 , 5 are connected in principle by a passage valve 11 and by a pump connection 13 .
- a turbo pump 15 of the pump connection 13 is ready to pump the liquid fuel between the chambers 3.5.
- an outlet is arranged, which has a closable external valve 17 outside of the chambers 3.5. Liquid propellant can be removed from or added to the tank through the outlet.
- FIG. 2 shows a method for leak testing and component testing of the tank system 1 from FIG. 1.
- the tank system 1 additionally has a control unit (not shown) for leak testing and component testing of the tank system 1. The following steps are carried out with the control unit, which lead to different states of the tank system 1, which are shown in FIG. 2 in the two partial images:
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021204309.7A DE102021204309A1 (de) | 2021-04-29 | 2021-04-29 | Dichtheitsprüfung und Komponentenprüfung eines Tanksystems |
| PCT/EP2022/055148 WO2022228752A1 (de) | 2021-04-29 | 2022-03-01 | Dichtheitsprüfung und komponentenprüfung eines tanksystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4330536A1 true EP4330536A1 (de) | 2024-03-06 |
Family
ID=80736032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22709711.0A Withdrawn EP4330536A1 (de) | 2021-04-29 | 2022-03-01 | Dichtheitsprüfung und komponentenprüfung eines tanksystems |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4330536A1 (de) |
| DE (1) | DE102021204309A1 (de) |
| WO (1) | WO2022228752A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117232819B (zh) * | 2023-11-16 | 2024-01-26 | 湖南大用环保科技有限公司 | 基于数据分析的阀体综合性能测试系统 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19637256A1 (de) * | 1996-09-13 | 1998-03-19 | Index Werke Kg Hahn & Tessky | Werkstückspindeleinrichtung für eine Werkzeugmaschine |
| US8539938B2 (en) | 2009-03-12 | 2013-09-24 | Ford Global Technologies, Llc | Fuel systems and methods for controlling fuel systems in a vehicle with multiple fuel tanks |
| US9086040B2 (en) | 2012-10-17 | 2015-07-21 | Ford Global Technologies, Llc | Fuel system degradation test using two fuel tanks |
| CN204553632U (zh) * | 2015-03-18 | 2015-08-12 | 天津市精研工程机械传动有限公司 | 风力发电机组偏航制动液压系统 |
| US10077731B2 (en) | 2015-05-22 | 2018-09-18 | Ford Global Technologies, Llc | Method for detecting fuel system degradation |
| JP2020030974A (ja) * | 2018-08-23 | 2020-02-27 | 本田技研工業株式会社 | 燃料ガス供給システム |
-
2021
- 2021-04-29 DE DE102021204309.7A patent/DE102021204309A1/de active Pending
-
2022
- 2022-03-01 EP EP22709711.0A patent/EP4330536A1/de not_active Withdrawn
- 2022-03-01 WO PCT/EP2022/055148 patent/WO2022228752A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022228752A1 (de) | 2022-11-03 |
| DE102021204309A1 (de) | 2022-11-03 |
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