IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0063400
(2002-04-18)
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발명자
/ 주소 |
- Hrovat, Davorin David
- Asgari, Jahanbakhsh
- Deur, Josko
- Schwartz, William Samuel
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출원인 / 주소 |
- Ford Global Technologies, LLC
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
45 인용 특허 :
14 |
초록
▼
A system and method to control the coolant temperature of two independent cooling loops of a fuel cell vehicle by adjusting system pump speed, fan speed and radiator bypass valve position. Multiple feedback controllers coordinated by robust flip-flop logic are used, to minimize energy consumption an
A system and method to control the coolant temperature of two independent cooling loops of a fuel cell vehicle by adjusting system pump speed, fan speed and radiator bypass valve position. Multiple feedback controllers coordinated by robust flip-flop logic are used, to minimize energy consumption and provide optimal control system performance even in the case of substantially different plant responses with respect to fan speed and valve position plant inputs. The system also includes a feed forward disturbance compensator, which reacts immediately to change in net power and vehicle speed disturbance variables, thereby reducing the variance of the temperature control error. Additionally, a feedback controller preset strategy is used to compensate for distinctive plant nonlinear effects such as bypass valve dead-zone and air-conditioning system's request for abrupt change of fan speed.
대표청구항
▼
A system and method to control the coolant temperature of two independent cooling loops of a fuel cell vehicle by adjusting system pump speed, fan speed and radiator bypass valve position. Multiple feedback controllers coordinated by robust flip-flop logic are used, to minimize energy consumption an
A system and method to control the coolant temperature of two independent cooling loops of a fuel cell vehicle by adjusting system pump speed, fan speed and radiator bypass valve position. Multiple feedback controllers coordinated by robust flip-flop logic are used, to minimize energy consumption and provide optimal control system performance even in the case of substantially different plant responses with respect to fan speed and valve position plant inputs. The system also includes a feed forward disturbance compensator, which reacts immediately to change in net power and vehicle speed disturbance variables, thereby reducing the variance of the temperature control error. Additionally, a feedback controller preset strategy is used to compensate for distinctive plant nonlinear effects such as bypass valve dead-zone and air-conditioning system's request for abrupt change of fan speed. 00900, Yano et al., 318/376; US-6137250, 20001000, Hirano et al., 318/376; US-6177773, 20010100, Nakano et al., 318/376; US-6205379, 20010300, Morisawa et al., 701/022; US-6209672, 20010400, Severinsky, 180/065.2; US-6232744, 20010500, Kawai et al., 320/132; US-6233508, 20010500, Deguchi et al., 701/022; US-6234932, 20010500, Kuroda et al., 477/003; US-6242873, 20010600, Drozdz et al., 318/139; US-6281660, 20010800, Abe, 320/103; US-6484830, 20021100, Gruenwald et al., 180/065.2 to engage the liner. 12. The method of claim 10, wherein moving the assembly of pivotably connected links comprises moving at least one of the links having a high friction surface to engage the liner. 13. The method of claim 10, wherein moving the assembly of pivotably connected links comprises moving at least one of the links having a profile to mate to a corresponding profile in the liner. 14. The method of claim 3, wherein lowering the tool string comprises lowering a perforating gun. 15. The method of claim 3, wherein lowering the tool string comprises lowering the tool string on a non-rigid carrier. 16. An apparatus for use in a wellbore having a liner and a restriction positioned in the liner, comprising: an anchor device having a gripping assembly, the gripping assembly when in a retracted state having an outer diameter less than an inner diameter of the restriction, the gripping assembly when in an expanded state having an outer diameter substantially the same as an inner diameter of the liner to enable the gripping assembly to engage the liner; and a motor to actuate the gripping assembly to the expanded state. 17. The apparatus of claim 16, wherein the restriction comprises a tubing having an inner diameter less than the inner diameter of the liner. 18. The apparatus of claim 16, wherein the gripping assembly comprises pivotably connected links adapted to be moved radially outwardly when actuated. 19. The apparatus of claim 18, wherein the gripping assembly further comprises: a first pivot element connecting a first link and a second link; a second pivot element connecting the first link to a first portion of the anchor device; and a third pivot element connecting the second link to a second portion of the anchor device. 20. The apparatus of claim 19, wherein the first portion comprises an actuator. 21. The apparatus of claim 20, wherein the actuator comprises a piston and at least two chambers containing compressible fluid. 22. The apparatus of claim 20, wherein the actuator comprises a piston and at least two chambers containing incompressible fluid. 23. The apparatus of claim 21, wherein the motor is operatively coupled to the actuator. 24. An apparatus for use in a wellbore having a liner and a restriction positioned in the liner, comprising: an anchor device having a gripping assembly, the gripping assembly when in a retracted state having an outer diameter less than an inner diameter of the restriction, the gripping assembly when in an expanded state having an outer diameter substantially the same as an inner diameter of the liner to enable the gripping assembly to engage the liner, wherein the anchor device further comprises a motor and a hydraulic module between the motor and the gripping assembly. 25. The apparatus of claim 24, further comprising a power member and a mechanism adapted to convert rotational movement of the motor to translational movement of the power member. 26. The apparatus of claim 25, wherein the hydraulic module comprises a piston and at least two chambers filled with compressible fluid. 27. An anchoring apparatus for use in a wellbore, comprising: a motor; a module having at least one compressible element; and a gripping assembly adapted to be actuated by the motor through the at least one compressible element in the module. 28. The anchoring apparatus of claim 27, wherein the motor is electrically-activated. 29. The anchoring apparatus of claim 27, further comprising: an actuation member; and a translator module to translate rotational movement of the motor to longitudinal movement of the actuation member, the actuation member adapted to operate the gripping assembly. 30. The anchoring apparatus of claim 29, wherein the module comprises a hydraulic module. 31. The anchoring apparatus of claim 30, wherein the hydraulic module comprises a piston and at least two chambers on first and second sides of the piston. 32. The anchoring apparatus of claim 31, w herein the at least first and second chambers contain compressible fluid. 33. The anchoring apparatus of claim 31, further comprising a third chamber and a conduit to communicate fluid between the third chamber and the first chamber, the actuation member to push fluid from the third chamber into the first chamber. 34. The anchoring apparatus of claim 33, further comprising a fourth chamber and a communications channel between the second chamber and the fourth chamber. 35. The anchoring apparatus of claim 34, further comprising a spring in the second chamber to oppose motion of the piston in a first direction. 36. The anchoring apparatus of claim 31, wherein the first and second chambers have substantially the same cross-sectional area. 37. An apparatus for use in a wellbore, comprising: a cutter device having at least one blade to cut through a downhole structure; and an anchor device connected to the cutter device, the anchor device adapted to engage the wellbore. 38. The apparatus of claim 37, wherein the anchor device has a gripping assembly with a retracted state and an expanded state, the gripping assembly when in the retracted state having an outer diameter less than an inner diameter of a tubing in the wellbore; and the gripping assembly when in the expanded state having an outer diameter greater than an outer diameter of the tubing. 39. The apparatus of claim 37, further comprising a motor to actuate the anchor device. 40. An apparatus for use in a wellbore comprising: a measurement device adapted to measure fluid flow rate in the wellbore; and an anchor device coupled to the measurement device, the anchor device adapted to engage the wellbore when in an expanded state, the anchor device adapted to pass through a restriction in the wellbore when in a retracted state, the anchor device adapted to engage the wellbore at an interval with a dimension larger than that of the restriction. 41. The apparatus of claim 40, wherein the anchor device is adapted to pass through a tubing, the restriction comprising the tubing. 42. The apparatus of claim 40, wherein the measurement device comprises a spinner. 19971200, Hipp, 166/196; US-5704393, 19980100, Connell et al., 137/614.21; US-5992250, 19991100, Kluth et al., 073/866.5; US-6250387, 20010600, Carmichael et al., 166/311; US-6260617, 20010700, Baugh, 166/241.3; US-6315498, 20011100, Baugh et al., 405/184; US-6343657, 20020200, Baugh et al., 166/383; US-20020095736, 20020700, Savard, 015/104.061
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