Systems and methods for controlling trim position of a marine propulsion device on a marine vessel
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-020/10
B63H-020/06
출원번호
US-0594228
(2015-01-12)
등록번호
US-9290252
(2016-03-22)
발명자
/ 주소
Tuchscherer, Andrew
Groeschel, John A.
출원인 / 주소
Brunswick Corporation
대리인 / 주소
Andrus Intellectual Property Law, LLP
인용정보
피인용 횟수 :
17인용 특허 :
20
초록▼
Systems and methods are for controlling trim position of a marine propulsion device on a marine vessel. The system comprises a trim actuator having a first end that is configured to couple to the marine propulsion device and a second end that is configured to couple to the marine vessel. The trim ac
Systems and methods are for controlling trim position of a marine propulsion device on a marine vessel. The system comprises a trim actuator having a first end that is configured to couple to the marine propulsion device and a second end that is configured to couple to the marine vessel. The trim actuator is movable between an extended position wherein the marine propulsion device is trimmed up with respect to the marine vessel and a retracted position wherein the marine propulsion device is trimmed down with respect to the marine vessel. Increasing an amount of voltage to an electromagnet increases the shear strength of a magnetic fluid in the trim actuator thereby restricting movement of the trim actuator into and out of the extended and retracted positions and wherein decreasing the amount of voltage to the electromagnet decreases the shear strength of the magnetic fluid thereby facilitates movement of the trim actuator into and out of the extended and retracted positions. A controller is configured to adapt the amount of voltage to the electromagnet based upon at least one condition of the system.
대표청구항▼
1. A system for controlling trim position of a marine propulsion device on a marine vessel, the system comprising: a trim actuator having a first end that is configured to couple to the marine propulsion device and a second end that is configured to couple to the marine vessel, the trim actuator bei
1. A system for controlling trim position of a marine propulsion device on a marine vessel, the system comprising: a trim actuator having a first end that is configured to couple to the marine propulsion device and a second end that is configured to couple to the marine vessel, the trim actuator being movable between an extended position wherein the marine propulsion device is trimmed up with respect to the marine vessel and a retracted position wherein the marine propulsion device is trimmed down with respect to the marine vessel;an electromagnet, wherein increasing an amount of voltage to the electromagnet increases the shear strength of a magnetic fluid in the trim actuator thereby restricting movement of the trim actuator into and out of the extended and retracted positions and wherein decreasing the amount of voltage to the electromagnet decreases the shear strength of the magnetic fluid thereby facilitating easier movement of the trim actuator into and out of the extended and retracted positions;a controller that is configured to adapt the amount of voltage to the electromagnet based upon at least one condition of the system. 2. The system according to claim 1, wherein the controller comprises a memory that stores a map that correlates the condition of the system to a respective amount of voltage, and wherein the controller adapts the amount of voltage according to the map. 3. The system according to claim 1, wherein the condition of the system comprises the age of the trim actuator. 4. The system according to claim 1, further comprising a pressure sensor that is configured to sense pressure of the magnetic fluid in the trim actuator, wherein the condition of the system comprises the pressure of the magnetic fluid in the trim actuator. 5. The system according to claim 4, wherein the controller is configured to reduce the amount of voltage when the pressure of the magnetic fluid exceeds a pressure threshold. 6. The system according to claim 1, further comprising a shift position sensor that is configured to sense a current gear state of the propulsion device, wherein the condition of the system comprises the current gear state of the propulsion device. 7. The system according to claim 6, wherein the controller is configured to reduce the amount of voltage if the current gear state is a forward gear and wherein the controller is configured to increase the amount of voltage if the current gear state is a reverse gear. 8. The system according to claim 1, further comprising a trim position sensor that is configured to sense a current trim position of the propulsion device, wherein the condition of the system comprises the current trim position of the propulsion device. 9. The system according to claim 8, wherein the controller is configured to increase the amount of voltage when the current trim position of the propulsion device exceeds a trim position threshold. 10. The system according to claim 1, further comprising an underwater impact sensor configured to sense a future impact to the propulsion device, wherein the condition of the system comprises a future impact to the propulsion device and wherein the controller is configured to reduce the amount of voltage when the underwater impact sensor senses a future impact to the propulsion device. 11. The system according to claim 1, further comprising an engine load sensor that is configured to sense a current engine load of the propulsion device, wherein the condition of the system comprises the current engine load of the propulsion device. 12. The system according to claim 1, further comprising an engine speed sensor that is configured to sense a current engine speed of the propulsion device, wherein the condition of the system comprises the current engine speed of the propulsion device. 13. The system according to claim 1, further comprising a steering angle sensor that is configured to sense a current steering angle of the propulsion device, wherein condition of the system comprises the current steering angle of the propulsion device. 14. The system according to claim 1, further comprising a display device, wherein the controller is configured to control the display to display a condition of the trim actuator to an operator. 15. The system according to claim 1, wherein the trim actuator is a hydraulic actuator and further comprising a source of pressurized magnetic fluid that supplies the pressurized magnetic fluid to the hydraulic actuator, wherein the hydraulic actuator further comprises a cylinder, a piston that reciprocates back and forth in the cylinder, and a rod that is coupled to the piston and extends from the cylinder, and further comprising a first inlet to the cylinder on a rod-side of the piston, a second inlet to the cylinder on a cylinder-side of the piston, and a valve that controls flow of the magnetic fluid to the rod-side of the piston and cylinder-side of the piston, wherein flow of magnetic fluid to the rod-side of the piston causes the piston to move such that the piston rod further retracts into the cylinder and wherein flow of magnetic fluid to the cylinder-side of the piston causes the piston to move such that the piston rod further extends from the cylinder. 16. The system according to claim 15, further comprising at least one passage past the piston, wherein the at least one passage conveys magnetic fluid past the piston as the trim actuator is forced by an over pressure event into or out of the extended and retracted positions, wherein increasing the amount of voltage to the electromagnet increases the viscosity of the magnetic fluid and thus restricts flow of the magnetic fluid past the passage in the piston and wherein decreasing the amount of voltage to the electromagnet decreases the viscosity of the magnetic fluid and thus eases flow of the magnetic fluid past the passage in the piston. 17. The system according to claim 16, wherein the electromagnet is coupled to the piston. 18. The system according to claim 17, wherein the electromagnet comprises at least one passage through which the magnetic fluid flows. 19. The system according to claim 16, wherein the at least one passage through the piston comprises a first passage that conveys the magnetic fluid from the rod-side of the piston to the cylinder-side of the piston and a second passage that conveys the magnetic fluid from the cylinder-side of the piston to the rod-side of the piston. 20. The system according to claim 1, further comprising at least one valve that controls flow of magnetic fluid through the at least one passage. 21. The system according to claim 20, wherein the at least one valve comprises a piezoelectric valve. 22. The system according to claim 20, wherein the at least one valve comprises a first check valve that is disposed in the first passage, the first check valve comprising a ball that is biased into a closed position by a plunger and spring, wherein when the magnetic fluid on the rod-side of the piston has a pressure that is larger than a bias force of the spring, the ball is moved into an open position and flow of magnetic fluid from the rod-side to the cylinder-side of the piston is permitted and wherein when the magnetic fluid on the rod-side of the piston has a pressure that is smaller than the bias force of the spring, the ball is biased by the spring into the closed position. 23. The system according to claim 22, wherein the at least one valve comprises a second check valve that is disposed in the second passage, the second check valve comprising a ball that is biased into a closed position by the pressure of the magnetic fluid on the rod-side, wherein when the magnetic fluid on the cylinder-side of the piston has a pressure that is greater than the pressure of the magnetic fluid on the rod-side of the piston, the ball is biased into an open position and flow of magnetic fluid from the cylinder-side to the rod-side of the piston is permitted, and wherein when the magnetic fluid on the cylinder-side of the piston has a pressure that is less than the pressure of the magnetic fluid on the rod-side of the piston, the ball is biased into the closed position. 24. A method for controlling trim position of a marine propulsion device on a marine vessel, the method comprising: providing a trim actuator having a first end that is configured to couple to the marine propulsion device and a second end that is configured to couple to the marine vessel, the trim actuator being movable between an extended position wherein the marine propulsion device is trimmed up with respect to the marine vessel and a retracted position wherein the marine propulsion device is trimmed down with respect to the marine vessel;providing an electromagnet, wherein increasing an amount of voltage to the electromagnet increases the shear strength of a magnetic fluid in the trim actuator thereby restricting movement of the trim actuator into and out of the extended and retracted positions and wherein decreasing the amount of voltage to the electromagnet decreases the shear strength of the magnetic fluid thereby facilitating easier movement of the trim actuator into and out of the extended and retracted positions; andadapting the amount of voltage to the electromagnet based upon at least one condition of the system.
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