Systems and methods for setting engine speed in a marine propulsion device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02D-011/10
B63H-021/21
B63H-021/14
F02D-009/08
출원번호
US-0610377
(2015-01-30)
등록번호
US-9555869
(2017-01-31)
발명자
/ 주소
Arbuckle, Jason S.
Andrasko, Steven J.
Przybyl, Andrew J.
O'Brien, William P.
Gable, Kenneth G.
Van Buren, David M.
Smedema, Gene A.
출원인 / 주소
Brunswick Corporation
대리인 / 주소
Andrus Intellectual Property Law, LLP
인용정보
피인용 횟수 :
0인용 특허 :
27
초록▼
A method for setting an engine speed of an internal combustion engine in a marine propulsion device of a marine propulsion system to an engine speed setpoint includes determining the engine speed setpoint based on an operator demand and predicting a position of a throttle valve that is needed to ach
A method for setting an engine speed of an internal combustion engine in a marine propulsion device of a marine propulsion system to an engine speed setpoint includes determining the engine speed setpoint based on an operator demand and predicting a position of a throttle valve that is needed to achieve the engine speed setpoint. The method also includes determining a feed forward signal that will move the throttle valve to the predicted position, and after moving the throttle valve to the predicted position, adjusting the engine speed with a feedback controller so as to obtain the engine speed setpoint. An operating state of the marine propulsion system is also determined. Depending on the operating state, the method may include determining limits on an authority of the feedback controller to adjust the engine speed and/or determining whether the operator demand should be modified prior to determining the engine speed setpoint.
대표청구항▼
1. A method for setting an engine speed of an internal combustion engine in a marine propulsion device of a marine propulsion system to an engine speed setpoint, the method comprising: determining the engine speed setpoint based on an operator demand;predicting a position of a throttle valve of the
1. A method for setting an engine speed of an internal combustion engine in a marine propulsion device of a marine propulsion system to an engine speed setpoint, the method comprising: determining the engine speed setpoint based on an operator demand;predicting a position of a throttle valve of the engine that is needed to achieve the engine speed setpoint;determining a feed forward signal that will move the throttle valve to the predicted position;after moving the throttle valve to the predicted position, adjusting the engine speed with a feedback controller so as to obtain the engine speed setpoint; anddetermining an operating state of the marine propulsion system, wherein depending on the operating state, the method further comprises: determining limits on an authority of the feedback controller to adjust the engine speed, wherein the authority limits comprise at least one of maximum and minimum proportional term limits and maximum and minimum integral term limits; anddetermining whether the operator demand should be modified prior to determining the engine speed setpoint when the operating state is a joysticking mode or a throttle-only mode. 2. The method of claim 1, wherein the operating state comprises operation in an operator-selected control mode, and further comprising selecting the authority limits based on the operator-selected control mode. 3. The method of claim 2, further comprising waiting to switch from a first operator-selected control mode to a second operator-selected control mode until the operator demand is less than an upper demand limit associated with the second operator-selected control mode. 4. The method of claim 1, wherein the operating state comprises operation in the joysticking mode, in which a direction and a magnitude of thrust of the marine propulsion device are determined based on a position of a joystick. 5. The method of claim 4, further comprising modifying the operator demand prior to determining the engine speed setpoint to account for one of a gear ratio and a pitch of a propeller of the marine propulsion device when the marine propulsion system is operating in the joysticking mode. 6. The method of claim 1, wherein the operating state comprises operation in the throttle-only mode, in which the operator demand can be varied while a transmission of the marine propulsion system is in neutral. 7. The method of claim 6, further comprising determining whether the operator demand exceeds a predetermined threshold when the marine propulsion system is operating in the throttle-only mode, and if so, modifying the operator demand by capping it at the predetermined threshold prior to determining the engine speed setpoint. 8. The method of claim 7, further comprising multiplying the feed forward signal by a fractional gain when the marine propulsion system is operating in the throttle-only mode. 9. The method of claim 1, wherein the operating state comprises one of acceleration of the engine speed and deceleration of the engine speed. 10. The method of claim 9, further comprising calculating a demand delta between a current operator demand and a previous operator demand, and using the demand delta and the engine speed setpoint to determine the authority limits. 11. The method of claim 10, further comprising filtering the previous operator demand to the current operator demand such that the demand delta progressively decreases, and using the decreasing demand delta and the engine speed setpoint to determine the authority limits. 12. The method of claim 11, further comprising providing the feedback controller with less authority to adjust the engine speed during deceleration of the engine speed than during acceleration of the engine speed. 13. The method of claim 11, further comprising providing the feedback controller with increasingly more authority to adjust the engine speed as the demand delta progressively decreases. 14. A marine propulsion system for setting an engine speed of an internal combustion engine in a marine propulsion device to an engine speed setpoint, the system comprising: a throttle valve controlling an amount of air provided to the engine;an input device for inputting an operator demand;an electronic control unit that determines the engine speed setpoint based on the operator demand, predicts a position of the throttle valve that is needed to achieve the engine speed setpoint, and determines a feed forward signal that will move the throttle valve to the predicted position; anda feedback controller that adjusts the engine speed so as to obtain the engine speed setpoint after the throttle valve has been moved to the predicted position;wherein the electronic control unit determines an operating state of the marine propulsion system; andwherein depending on the operating state, the electronic control unit further determines: limits on an authority of the feedback controller to adjust the engine speed, wherein the authority limits comprise at least one of maximum and minimum proportional term limits and maximum and minimum integral term limits; andwhether the operator demand should be modified prior to determination of the engine speed setpoint when the operating state is a joysticking mode or a throttle-only mode. 15. The marine propulsion system of claim 14, wherein the operating state comprises operation in an operator-selected control mode, and wherein the electronic control unit selects the authority limits based on the operator-selected control mode. 16. The marine propulsion system of claim 15, wherein the electronic control unit prevents a switch from a first operator-selected control mode to a second operator-selected control mode until the operator demand is less than an upper demand limit associated with the second operator-selected control mode. 17. The marine propulsion system of claim 14, wherein the input device comprises a joystick, and wherein the operating state comprises operation in the joysticking mode, in which a direction and a magnitude of thrust of the marine propulsion device are determined based on a position of the joystick. 18. The marine propulsion system of claim 17, wherein the electronic control unit modifies the operator demand prior to determining the engine speed setpoint to account for one of a gear ratio and a pitch of a propeller of the marine propulsion device when the marine propulsion system is operating in the joysticking mode. 19. The marine propulsion system of claim 14, wherein the operating state comprises operation in the throttle-only mode, in which the input device can be used to vary the operator demand while a transmission of the marine propulsion system is in neutral. 20. The marine propulsion system of claim 19, wherein the electronic control unit determines whether the operator demand exceeds a predetermined threshold when the marine propulsion system is operating in the throttle-only mode, and if so, modifies the operator demand by capping it at the predetermined threshold prior to determining the engine speed setpoint. 21. The marine propulsion system of claim 14, wherein the operating state comprises one of acceleration of the engine speed and deceleration of the engine speed. 22. The marine propulsion system of claim 21, wherein the electronic control unit calculates a demand delta between a current operator demand and a previous operator demand, and uses the demand delta and the engine speed setpoint to determine the authority limits. 23. The marine propulsion system of claim 22, wherein the feedback controller has less authority to adjust the engine speed during deceleration of the engine speed than during acceleration of the engine speed.
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