Posture control system for hull, control method therefor, and marine vessel
A posture control system for a hull includes trim tab main bodies as posture control plates attached to a stern of the hull to control the posture of the hull. Trim tab actuators drive the trim tab main bodies. Engines generate a propulsive force on the hull. A controller controls the trim tab actuators. Based on a throttle opening angle of the engines, the controller determines a time when the trim tab main bodies are to be lowered by the trim tab actuators.
1. A posture control system for a hull, the posture control system comprising:
a posture control plate attachable to a stern of the hull to control a posture of the hull;
a driver to drive the posture control plate;
a marine propulsion device to generate a propulsive force for the hull; and
a controller configured or programmed to control the driver; wherein
the marine propulsion device is separate from the posture control plate; and
based on a throttle opening angle of an engine of the marine propulsion device, the controller is configured or programmed to determine a time when the posture control plate is to be lowered by the driver.
2. The posture control system according to claim 1 , wherein the controller is configured or programmed to cause the driver to lower the posture control plate at a time when the controller judges that the throttle opening angle of the engine corresponds to a request to accelerate the hull to a predetermined speed.
3. The posture control system according to claim 2 , wherein the predetermined speed is a speed at which, after the hull is accelerated to the predetermined speed, fuel efficiency is better in a case in which the posture control plate is lowered than in a case in which the posture control plate is not lowered.
4. The posture control system according to claim 2 , wherein the predetermined speed is a speed at which the hull shifts into a hump state.
5. The posture control system according to claim 1 , wherein the controller is configured or programmed to determine the throttle opening angle of the engine according to an operated amount of a throttle operator.
6. The posture control system according to claim 1 , wherein the throttle opening angle of the engine is obtained by measuring an actual opening angle of a throttle valve.
7. The posture control system according to claim 1 , wherein the controller is configured or programmed to cause the driver to raise the lowered posture control plate at a predetermined time after causing the driver to lower the posture control plate.
8. The posture control system according to claim 7 , wherein the predetermined time is when the controller judges that the throttle opening angle of the engine corresponds to a request to accelerate the hull to a speed at which the hull shifts into a planing state.
9. The posture control system according to claim 7 , wherein the predetermined time is when the controller judges that the throttle opening angle of the engine corresponds to a request to accelerate the hull to a speed at which fuel efficiency is better in a case in which the posture control plate is not lowered than in a case in which the posture control plate is lowered.
10. A posture control system for a hull, the posture control system comprising:
a marine propulsion device to generate a propulsive force on the hull;
a posture control plate to control a posture of the hull, the posture control plate being separate from the marine propulsion device; and
a controller configured or programmed to, based on a throttle opening angle of an engine of the marine propulsion device, judge whether or not the hull has accelerated to a predetermined speed, and lower the posture control plate at a time when the controller judges that the hull is to be accelerated to the predetermined speed.
11. A control method for a posture control system for a hull, the posture control system including a posture control plate attachable to a stern of the hull to control a posture of the hull, a driver to drive the posture control plate, a marine propulsion device to generate a propulsive force for the hull, and a controller configured or programmed to control the driver, the method comprising:
based on a throttle opening angle of an engine of the marine propulsion device, determining with the controller a time when the posture control plate is to be lowered by the driver; wherein
the marine propulsion device is separate from the posture control plate.
12. A marine vessel comprising:
a hull; and
a posture control system for the hull, the posture control system including:
a posture control plate attached to a stern of the hull to control a posture of the hull;
a driver to drive the posture control plate;
a marine propulsion device to generate a propulsive force for the hull; and
a controller configured or programmed to control the driver; wherein the marine propulsion device is separate from the posture control plate; and
based on a throttle opening angle of an engine of the marine propulsion device, the controller is configured or programmed to determine a time when the posture control plate is to be lowered by the driver.
13. A posture control system for a hull, the posture control system comprising:
a posture control plate attachable to a stern of the hull to control a posture of the hull;
a driver to drive the posture control plate;
a marine propulsion device to generate a propulsive force for the hull; and
a controller configured or programmed to controls the driver; wherein
the marine propulsion device is separate from the posture control plate; and
based on an operated amount of a throttle operator, the controller is configured or programmed to determine a time when the posture control plate is to be lowered by the driver.
14. The posture control system according to claim 13 , wherein the controller is configured or programmed to cause the driver to lower the posture control plate at a time when the controller judges that the operated amount of the throttle operator corresponds to a request to accelerate the hull to a predetermined speed.
15. The posture control system according to claim 14 , wherein the predetermined speed is a speed at which, after the hull is accelerated to the predetermined speed, fuel efficiency is better in a case in which the posture control plate is lowered than in a case in which the posture control plate is not lowered.
16. The posture control system according to claim 14 , wherein the predetermined speed is a speed at which the hull shifts into a hump state.
17. The posture control system according to claim 13 , wherein, after causing the driver to lower the posture control plate, the controller is configured or programmed to cause the driver to raise the lowered posture control plate at a predetermined time.
18. The posture control system according to claim 17 , wherein the predetermined time is when the controller judges that the operated amount of the throttle operator corresponds to a request to accelerate the hull to a speed at which the hull shifts into a planing state.
19. The posture control system according to claim 17 , wherein the predetermined time is when the controller judges that the operated amount of the throttle operator corresponds to a request to accelerate the hull to a speed at which fuel efficiency is better in a case in which the posture control plate is not lowered than in a case in which the posture control plate is lowered.