IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0995950
(2008-11-28)
|
등록번호 |
US-8706343
(2014-04-22)
|
우선권정보 |
DE-10 2008 002 224 (2008-06-05) |
국제출원번호 |
PCT/EP2008/066408
(2008-11-28)
|
§371/§102 date |
20110407
(20110407)
|
국제공개번호 |
WO2009/146757
(2009-12-10)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
The invention relates to a method for preparing models of technical devices, wherein each technical device comprises units that are connected to each other by means of connection point, wherein, when performing the method, at least one structure made of units connected to each other by means of conn
The invention relates to a method for preparing models of technical devices, wherein each technical device comprises units that are connected to each other by means of connection point, wherein, when performing the method, at least one structure made of units connected to each other by means of connection points comprising commonalities for all technical devices is integrated and automatically described as at least one common module (8) for all models.
대표청구항
▼
1. A method for detecting leaks in a tank system, wherein the presence of leaks is inferred from pressure changes in the tank system in response to externally caused pressure fluctuations, wherein the effect of the temperature in the tank system is taken into account in that an expected pressure cha
1. A method for detecting leaks in a tank system, wherein the presence of leaks is inferred from pressure changes in the tank system in response to externally caused pressure fluctuations, wherein the effect of the temperature in the tank system is taken into account in that an expected pressure change in the tank system for a predetermined leak size is determined as a function of the temperature, and the presence of leaks is inferred from the comparison of an actual pressure change to the expected pressure change, wherein in order to determine the expected pressure change the following steps are involved: determining, by a control system, the equilibrium vapor pressure as the partial pressure of the fuel (HC) ΔHCequi at a given temperature,determining, by the control system, the deviation between ΔHCequi and a modeled partial pressure of the fuel ΔHC,determining, by the control system, an evaporation rate of the fuel from the deviation between ΔHCequi and ΔHC,determining, by the control system, the net evaporation rate as the difference between the evaporation rate and a modeled HC leak flow,integrating, by the control system, the net evaporation rate over the time for determining the vaporous HC mass,determining, by the control system, the modeled partial pressure ΔHC from the vaporous HC mass at a given volume and given temperature anddetermining, by the control system, the modeled HC leak flow on the basis of the modeled ΔHC at a given partial pressure of the air Δair at a predetermined leak size. 2. The method according to claim 1, wherein the predetermined leak size corresponds to a leak having a diameter of 0.1 mm to 0.8 mm, preferably 0.3 mm to 0.6 mm. 3. The method according to claim 1, wherein the temperature in the tank system is measured or estimated. 4. The method according to claim 1, wherein the course of the vapor pressure of a fuel is taken into account as a function of the temperature. 5. The method according to claim 4, wherein the courses of the vapor pressure are deposited as a function of the temperature for at least two fuels and one course is selected and taken into account. 6. The method according to claim 5, wherein the selection of a course results by taking factors into account which allow for a certain fuel to be inferred, wherein the factors fuel volatility, fuel quality, exhaust gas values at dynamic load changes, engine behavior at start-up, season of the year, geographical location and/or ambient temperature course are preferably included. 7. The method according to claim 1, wherein the externally caused pressure fluctuations are natural pressure fluctuations. 8. The method according to claim 1, wherein the externally caused pressure fluctuations are caused by separate pressure sources. 9. A motor vehicle comprising: an engine having an intake manifold in fluid communication with a fuel tank; anda control device in electrical communication with the engine, the control device comprise computer code that when executed preforms a method for detecting a leak within the fuel tank, the method comprising: receiving, at the control device, a temperature measurement,determining, at the control device, an equilibrium vapor pressure as a function of a partial pressure of a fuel located within the tank, the partial pressure of the fuel being a function of the temperature measurement,determining, at the control device, a modeled partial pressure of the fuel,determining, at the control device, an evaporation rate of the fuel, the evaporation rate being assumed to be substantially proportional to a deviation between the partial pressure of the fuel and the modeled partial pressure of the fuel,determine, at the control device, a modeled fuel leak based on a predetermined leak size, anddetermine, at the control device, a net evaporation rate, the net evaporation rate being a function of the evaporation rate and the modeled fuel leak. 10. The motor vehicle of claim 9, wherein the temperature measurement is received from a temperature sensor and indicates ambient temperature. 11. The motor vehicle of claim 9, wherein the temperature measurement is an estimate temperature. 12. The motor vehicle of claim 9, wherein determining the model fuel leak comprises accounting for a fuel consumption by the engine.
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