IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0441200
(2003-05-20)
|
우선권정보 |
IT-TO2002A0568 (2002-07-01) |
발명자
/ 주소 |
- Borean, Fabio
- Puccio, Mitzi
|
출원인 / 주소 |
- C.R.F. Societa Consortile Perazioni
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
4 |
초록
▼
In an internal-combustion engine equipped with an electronically controlled hydraulic system for variable actuation of the inlet and/or exhaust valves of the engine, the hydraulic system for actuation of the valves includes, for each engine valve, a solenoid valve for controlling the corresponding h
In an internal-combustion engine equipped with an electronically controlled hydraulic system for variable actuation of the inlet and/or exhaust valves of the engine, the hydraulic system for actuation of the valves includes, for each engine valve, a solenoid valve for controlling the corresponding hydraulic actuator. Each solenoid valve is controlled according to a pre-set control criterion according to the operating parameters of the engine, said pre-set control criterion corresponding to reference operating conditions of the hydraulic fluid and, in particular, to the value of viscosity of the hydraulic fluid, which varies with temperature. The aforesaid control criterion is, however, adjusted according to an estimated deviation between reference operating conditions of the hydraulic fluid and actual operating conditions of the hydraulic fluid.
대표청구항
▼
In an internal-combustion engine equipped with an electronically controlled hydraulic system for variable actuation of the inlet and/or exhaust valves of the engine, the hydraulic system for actuation of the valves includes, for each engine valve, a solenoid valve for controlling the corresponding h
In an internal-combustion engine equipped with an electronically controlled hydraulic system for variable actuation of the inlet and/or exhaust valves of the engine, the hydraulic system for actuation of the valves includes, for each engine valve, a solenoid valve for controlling the corresponding hydraulic actuator. Each solenoid valve is controlled according to a pre-set control criterion according to the operating parameters of the engine, said pre-set control criterion corresponding to reference operating conditions of the hydraulic fluid and, in particular, to the value of viscosity of the hydraulic fluid, which varies with temperature. The aforesaid control criterion is, however, adjusted according to an estimated deviation between reference operating conditions of the hydraulic fluid and actual operating conditions of the hydraulic fluid. racterized by boiler performance parameters, comprising: a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler state variables and to the boiler performance parameters; a system model that relates the sootblower operating settings to the boiler performance parameters; an indirect controller that determines desired sootblower operating settings to satisfy the received performance goal for the boiler using the system model, the received performance goal for the boiler and the received data values; and a controller output that outputs the desired sootblower operating settings. 8. The system of claim 7, a performance monitoring system in communication with said indirect controller, including a performance sensor to measure the data values, said performance monitoring system providing the data values to the indirect controller.9. The system of claim 7, wherein said system model is a neural network.10. The system of claim 7, wherein said system model is a mass-energy balance model.11. The system of claim 7, wherein said system model is a genetically programmed model.12. The system of claim 7, further comprising a plurality of sootblowers, said controller output being in communication with said plurality of sootblowers, said plurality of sootblowers operating according to said desired sootblower operating settings.13. A system for determining a set of desired cleanliness levels in a boiler, one or more heat zones being defined in the boiler, each heat zone having a cleanliness level and being associated with an adjustable desired cleanliness level during the operation of the boiler, the performance of the boiler being characterized by boiler performance parameters, comprising: a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler state variables and to the boiler performance parameters, said boiler state variables including current cleanliness levels; a direct controller that determines a set of desired cleanliness levels to satisfy the performance goal for the boiler, said direct controller using the received data values and the received performance goal to determine the set of desired cleanliness levels; and a controller output that outputs the set of desired cleanliness levels. 14. The system of claim 13, further comprising a performance monitoring system in communication with said controller input, the performance monitoring system including at least one performance sensor to measure the data, said performance monitoring system providing the data values to the direct controller.15. The system of claim 13, wherein said controller is a neural network.16. The system of claim 13, wherein said controller is a mass-energy balance.17. The system of claim 13, wherein said controller model is genetically programmed.18. The system of claim 13, further comprising a sootblower subsystem in communication with the controller output for receiving the set of desired cleanliness levels in the boiler, the sootblower subsystem including one or more sootblowers and a controller for instructing the one or more sootblowers to maintain the set of desired cleanliness levels in the boiler.19. A system for determining desired sootblower operating settings for a plurality of sootblowers, the operation of the sootblowers being characterized by one or more sootblower operating parameters, in a boiler, the performance of the boiler being characterized by boiler performance parameters, comprising: a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler state variables and the boiler performance parameters; a direct controller that determines
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