Jet propulsion watercraft
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorMitsuyoshi Nakamura
Life of this patent
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Abstract
A jet propulsion watercraft includes a watercraft body, a drive source in the watercraft body, a jet pump to suck and eject water with a drive force from the drive source to generate a propulsive force, a vibration sensor, and a controller. The vibration sensor is located in the jet pump to detect vibration of the jet pump. The controller is configured or programmed to determine whether or not a detection result from the vibration sensor meets a predetermined condition. The controller is configured or programmed to, when it is determined that the detection result from the vibration sensor meets the predetermined condition, inform a user of user-oriented information.
Claims9
A jet propulsion watercraft comprising:
- a watercraft body;
- a drive source in the watercraft body;
- a jet pump to suck in and eject water with a drive force from the drive source to generate a propulsive force;
- a vibration sensor in the jet pump to detect vibration of the jet pump;
- and
- a controller configured or programmed to determine whether or not a detection result from the vibration sensor meets a predetermined condition and, when it is determined that the detection result from the vibration sensor meets the predetermined condition, inform a user of user-oriented information;
- wherein
- the controller is configured or programmed to, when it is determined that the detection result from the vibration sensor meets the predetermined condition, stop the drive source.
A jet propulsion watercraft comprising:
- a watercraft body:
- a drive source in the watercraft body:
- a jet pump to suck in and eject water with a drive force from the drive source to generate a propulsive force;
- a vibration sensor in the jet pump to detect vibration of the jet pump;
- and
- a controller configured or programmed to determine whether or not a detection result from the vibration sensor meets a predetermined condition and, when it is determined that the detection result from the vibration sensor meets the predetermined condition, inform a user of user-oriented information;
- wherein
- the vibration sensor is in a portion of the jet pump outside of the watercraft body.
A jet propulsion watercraft comprising:
- a watercraft body:
- a drive source in the watercraft body;
- a jet pump to suck in and eject water with a drive force from the drive source to generate a propulsive force;
- a vibration sensor in the jet pump to detect vibration of the jet pump;
- and
- a controller configured or programmed to determine whether or not a detection result from the vibration sensor meets a predetermined condition and, when it is determined that the detection result from the vibration sensor meets the predetermined condition, inform a user of user-oriented information;
- wherein
- the vibration sensor is in a portion of the jet pump inside the watercraft body;
- the jet pump includes:
- a drive shaft including an inner shaft inside the watercraft body and an outer shaft outside the watercraft body to rotate integrally with the inner shaft, the drive shaft being operable to rotate when the drive force from the drive source is transmitted to the drive shaft;
- and
- a housing bearing inside the watercraft body and including an inner bearing supporting the inner shaft, a holder supporting the inner bearing, and a damper elastically supporting the holder;
- and
- the vibration sensor is on the inner bearing or the holder.
Dependencies are inferred from the claim text.