Patent ID: 9205907
Filing Date: 2015-12-08
Classification: B63H,F16H

Abstract:
1. An outboard motor adapted to be mounted on a stern of a hull of a boat and installed with an internal combustion engine to power a propeller through a power transmission shaft, comprising: a transmission having at least a first-speed gear and a second-speed gear each supported on the power transmission shaft, a first-speed gear clutch that is made of a mechanical dog clutch and is adapted to engage the first-speed gear on the power transmission shaft, a second-speed gear clutch that is made of a hydraulic clutch and is adapted to engage the second-speed gear on the power transmission shaft, and a first-speed gear shift actuator that is adapted to couple the first-speed gear clutch with the first-speed gear, wherein a first speed is established when the first-speed gear is engaged on the power transmission shaft and a second speed is established when the second-speed gear is engaged on the power transmission shaft while the first speed has been established such that power of the engine is transmitted to the propeller through the established speed; an hydraulic oil pump that discharges a pressurized hydraulic oil when driven by the engine; a first electromagnetic solenoid valve provided at an oil passage connecting the pump and the first-speed gear shift actuator; a second electromagnetic solenoid valve provided at an oil passage connecting the pump and the second-speed gear clutch; a first switch valve provided at the oil passage connecting the pump and the first-speed gear shift actuator and is adapted to supply the hydraulic oil discharged by the pump to the first-speed gear shift actuator; a second switch valve provided at the oil passage connecting the pump and the second-speed gear clutch and is adapted to supply the hydraulic oil discharged by the pump to the second-speed gear clutch; and a third switch valve provided at an oil passage connecting the second switch valve and the second-speed gear clutch and is adapted to supply the hydraulic oil discharged by the pump through the second switch valve to the second-speed gear clutch, wherein the first electromagnetic solenoid valve is connected to the first-speed gear shift actuator and the third switch valve through the first switch valve, while the second electromagnetic solenoid valve is connected to the third switch valve through the second switch valve.