Electrical monitoring of gaseous fuel admission valves
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02D-019/02
F02D-041/22
F02D-041/24
F02D-019/06
F02D-041/00
F02D-037/02
F02D-041/20
출원번호
US-0639978
(2015-03-05)
등록번호
US-10208683
(2019-02-19)
우선권정보
EP-14158264 (2014-03-07)
발명자
/ 주소
Sixel, Eike Joachim
Marscheider, Hannes
Wester, Daniel
Sivasubramanian, Arvind
Barnes, Travis
Gallmeyer, Chris
Frey, Jedediah A.
Neaville, Andrew J.
Calderwood, Robert
출원인 / 주소
Caterpillar Motoren GmbH & Co. KG
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A method of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The method includes operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve. The method further includes measuring a sequence
A method of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The method includes operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve. The method further includes measuring a sequence of temporal developments of an electrical operation parameter respectively associated with an actuation of the gaseous fuel admission valve. The sequence includes a first temporal development to be evaluated and a plurality of temporal developments preceding the first temporal development. The method also includes evaluating operability of the gaseous fuel admission valve based on the first temporal development of the measured sequence and at least one of the plurality of preceding temporal developments of the measured sequence.
대표청구항▼
1. A method for evaluating operability of a gaseous fuel admission valve of an internal combustion engine, the method comprising: operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve and burning the gaseous fuel in at least one cylinder of
1. A method for evaluating operability of a gaseous fuel admission valve of an internal combustion engine, the method comprising: operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve and burning the gaseous fuel in at least one cylinder of the internal combustion engine;measuring, using a sensor associated with the gaseous fuel admission valve, a plurality of temporal developments of an electrical operation parameter respectively associated with an actuation of the gaseous fuel admission valve, the plurality of temporal developments including a first temporal development to be evaluated, and a plurality of preceding temporal developments preceding the first temporal development; anddetermining, using a control unit, an operating condition of the gaseous fuel admission valve based on a comparison of the first temporal development and at least one preceding temporal development of the plurality of preceding temporal developments; andadjusting a supply of the gaseous fuel to the at least one cylinder of the internal combustion engine based on the determined operating condition,each temporal development of the plurality of temporal developments including at least one of an opening section, in which the gaseous fuel admission valve is moving open by energizing the gaseous fuel admission valve, anda closing section, in which the gaseous fuel admission valve is moving closed by deenergizing the gaseous fuel admission valve. 2. The method of claim 1, wherein the method step of determining the operating condition further comprises determining a temporal deviation of the first temporal development with respect to the at least one preceding temporal development of the plurality of preceding temporal developments. 3. The method of claim 1, wherein each temporal development of the plurality of temporal developments comprises: the opening section;a maintaining open section, in which the gaseous fuel admission valve is maintained open by maintaining the gaseous fuel admission valve energized; andthe closing section. 4. The method of claim 3, wherein the method step of determining the operating condition further comprises comparing at least one of the opening section, the maintaining open section, and the closing section of the first temporal development and a respective section of the at least one preceding temporal development of the plurality of preceding temporal developments. 5. The method of claim 1, wherein the method step of determining the operating condition further comprises at least one of: comparing a first mean value of the first temporal development to a second mean value of a subgroup of preceding temporal developments of the plurality of preceding temporal developments; andcomparing the first mean value of the first temporal development to a threshold value associated with the second mean value of the subgroup of preceding temporal developments of the plurality of preceding temporal developments. 6. The method of claim 1, wherein the method step of determining the operating condition further includes deriving a tendency parameter from a subgroup of preceding temporal developments of the plurality of preceding temporal developments, and comparing the tendency parameter to the first temporal development. 7. The method of claim 1, further comprising at least one of: determining the operating condition of the gaseous fuel admission valve as being inoperable;determining the operating condition of the gaseous fuel admission valve as having a limited operability; anddetermining a contamination degree of the gaseous fuel admission valve. 8. The method of claim 1, wherein adjusting the supply of the gaseous fuel includes stopping a gaseous fuel mode of the at least one cylinder associated with the gaseous fuel admission valve. 9. The method of claim 8, wherein stopping the gaseous fuel mode comprises at least one of: stopping the supply of the gaseous fuel from a gaseous fuel source to the at least one cylinder of the internal combustion engine;supplying a purge gas upstream of the gaseous fuel admission valve; andpreventing ignition in the at least one cylinder associated with the gaseous fuel admission valve. 10. The method of claim 1, wherein the plurality of temporal developments include temporal developments of at least one of consecutive combustion cycles,combustion cycles at predetermined intervals, andcombustion cycles with substantially similar engine parameters. 11. The method of claim 1, wherein the method step of determining the operating condition is further based on engine parameters, the engine parameters including at least one of an engine load, an engine speed, an inlet manifold pressure, a charge air pressure, a gaseous fuel manifold pressure, a charge air temperature, a combustion pressure, and a combustion temperature. 12. The method of claim 1, wherein the electrical operation parameter includes one of a current value and a voltage value of an electrical power drawn by the gaseous fuel admission valve during actuation of the gaseous fuel admission valve. 13. An internal combustion engine, comprising: a gaseous fuel system;a plurality of cylinders to receive gaseous fuel from the gaseous fuel system;a plurality of gaseous fuel admission valves, each gaseous fuel admission valve of the plurality of gaseous fuel admission valves being associated with a cylinder of the plurality of cylinders, each gaseous fuel admission valve fluidly connecting the gaseous fuel system with a respective cylinder of the plurality of cylinders;at least one sensor configured to measure an electrical operation parameter of each gaseous fuel admission valve of the plurality of gaseous fuel admission valves; anda control unit configured to receive the electrical operation parameter for each gaseous fuel admission valve from the at least one sensor, the electrical operation parameter being associated with an actuation of a respective gaseous fuel admission valve of the plurality of gaseous fuel valves, and the control unit is further configured to perform a method including: operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve and combusting the gaseous fuel in at least one cylinder of the plurality of cylinders;measuring, using the at least one sensor, a plurality of temporal developments of the electrical operation parameter respectively associated with an actuation of each gaseous fuel admission valve, the temporal developments including a first temporal development to be evaluated and a plurality of preceding temporal developments preceding the first temporal development;determining an operating condition of the gaseous fuel admission valve based on a comparison of the first temporal development and at least one preceding temporal development of the plurality of preceding temporal developments; andadjusting a supply of the gaseous fuel to the at least one cylinder based on the determined operating condition,each temporal development of the plurality of temporal developments including at least one of an opening section, in which the gaseous fuel admission valve is moving open by energizing the gaseous fuel admission valve, anda closing section, in which the gaseous fuel admission valve is moving closed by deenergizing the gaseous fuel admission valve. 14. The internal combustion engine of claim 13, wherein the internal combustion engine is configured as one of a dual fuel internal combustion engine and a gaseous fuel internal combustion engine. 15. The internal combustion engine of claim 13, further including a pressure sensor configured to generate a signal corresponding to a temporal development of a pressure within a cylinder of the plurality of cylinders. 16. The internal combustion engine of claim 13, wherein the control unit is further configured to determine at least one of: inoperability of the gaseous fuel admission valve;a limited operability of the gaseous fuel admission valve; anda contamination degree of the gaseous fuel admission valve. 17. The internal combustion engine of claim 13, wherein the control unit is further configured to stop a gaseous fuel mode of the at least one cylinder associated with a gaseous fuel admission valve of the plurality of gaseous fuel admission valves. 18. The internal combustion engine of claim 17, wherein the control unit is further configured to stop the gaseous fuel mode by performing one of: stopping a supply of gaseous fuel from a gaseous fuel source to the at least one cylinder of the internal combustion engine;supplying a purge gas upstream of the gaseous fuel admission valve; andpreventing ignition in the at least one cylinder associated with the gaseous fuel admission valve. 19. The internal combustion engine of claim 13, wherein the electrical operation parameter is one of a current value and a voltage value of an electrical power drawn by a gaseous fuel admission valve of the plurality of gaseous fuel admission valves during actuation of the gaseous fuel admission valve.
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이 특허에 인용된 특허 (4)
Shimizu Motohiro (Wako JPX), Control system for internal combustion engines.
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