US 12,344,363 B2
Hybrid ship propulsion machine
Masatoshi Kimpara, Hamamatsu (JP)
Assigned to SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed by SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed on Sep. 7, 2022, as Appl. No. 17/939,498.
Claims priority of application No. 2021-152542 (JP), filed on Sep. 17, 2021.
Prior Publication US 2023/0087983 A1, Mar. 23, 2023
Int. Cl. B63H 21/20 (2006.01); B63H 11/08 (2006.01); B63H 20/32 (2006.01)
CPC B63H 21/20 (2013.01) [B63H 11/08 (2013.01); B63H 20/32 (2013.01); B63H 2021/205 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A hybrid ship propulsion machine comprising:
an internal-combustion-drive propulsion part configured to generate a propulsive force of a ship by an internal combustion engine; and
an electric propulsion part configured to generate a propulsive force of the ship by an electric motor, wherein
the internal-combustion-drive propulsion part includes
the internal combustion engine;
a propeller shaft configured to be rotated by power output from the internal combustion engine;
a power transmission mechanism configured to transmit the power output from the internal combustion engine to the propeller shaft;
a first housing part housing the power transmission mechanism and the propeller shaft;
a propeller attached to the propeller shaft; and
an anti-cavitation plate provided in the first housing part and is disposed above the propeller,
the electric propulsion part includes
a duct in which a suction port through which water is sucked is provided on one end side and a discharge port through which water sucked from the suction port is discharged is provided on the other end side;
the electric motor;
a second housing part attached to the duct and houses the electric motor;
an impeller provided in the duct and is configured to generate a jet; and
an impeller shaft configured to transmit power output from the electric motor to the impeller to rotate the impeller, and
the electric propulsion part is attached to the first housing part, and is disposed at a position higher than the anti-cavitation plate such that the suction port sinks below a water surface during low-speed movement, which is not a planing state of the ship, and the suction port comes out of the water surface during planing of the ship.