US 12,252,227 B2
Marine propulsion system and marine vessel
Yuji Ikegaya, Shizuoka (JP)
Assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka (JP)
Filed by YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
Filed on Oct. 21, 2022, as Appl. No. 17/970,620.
Claims priority of application No. 2021-180212 (JP), filed on Nov. 4, 2021.
Prior Publication US 2023/0136043 A1, May 4, 2023
Int. Cl. B63H 25/00 (2006.01); B63H 20/12 (2006.01); B63H 25/42 (2006.01); B63H 20/00 (2006.01); B63H 21/20 (2006.01); B63H 25/02 (2006.01)
CPC B63H 25/42 (2013.01) [B63H 20/12 (2013.01); B63H 2020/003 (2013.01); B63H 2021/205 (2013.01); B63H 2025/026 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A marine propulsion system comprising:
a main propulsion device to be attached to a stern of a hull, including an engine to drive a main thruster to generate a thrust, and operable to rotate in a right-left direction to change a direction of the thrust;
an auxiliary propulsion device to be attached to the stern, including an electric motor to drive an auxiliary thruster to generate a thrust, operable to rotate in the right-left direction to change a direction of the thrust, and having a maximum output smaller than a maximum output of the main propulsion device;
an operator; and
a controller configured or programmed to control driving of the main propulsion device and the auxiliary propulsion device based on a predetermined operation on the operator; wherein
the auxiliary propulsion device is provided to one side of the hull in the right-left direction;
the controller is configured or programmed to perform a rudder angle change control to change a rudder angle of the auxiliary propulsion device by a predetermined angle to one side in the right-left direction of the hull with respect to a forward-rearward direction of the hull so as to move the hull along the forward-rearward direction without rotating the hull when motorized forward-rearward movement is performed to move the hull along the forward-rearward direction by driving the auxiliary propulsion device without generating the thrust from the main propulsion device; and
the controller is configured or programmed to perform a control to perform the motorized forward-rearward movement while a rudder angle of the main propulsion device is maintained in the forward-rearward direction of the hull.