Yanmar Co., Ltd.

Kanzaki Kokyukoki Mfg. Co., Ltd.

Yanmar Diesel Engine Co., Ltd.

Toshio Imanaka

Hisanori Mori

Junichi Hitachi

Mitsuhiro Nakagaki

Hiroyasu Yukino

Takayuki Toda

Takashi Miyamoto

Kazuyoshi Harada

Shigeaki Nakagawa

Takayuki Sakamoto

Osamu Matsumoto

The subject invention provides a hydraulic saildrive apparatus comprising an upper unithaving an input shaftconnected to an engineinside a boat, and a lower unithaving an output shaftincluding a propeller shaftand also having a lower portion protruding from the boat's bottom, wherein the upper unitis provided with a hydraulic forward and reverse switching clutchfor transmitting the rotation direction of the input shaftto the propeller shaft, the clutchbeing capable of changing the rotation direction between forward and reverse relative to the input shaft

Hydraulic saildrive apparatus

A method to assemble a marine drive system wherein an acceptable-unacceptable criterion on the torsional vibration of a shaft of the marine drive system is established based on the correlation between the torsional stiffness of a propeller shaft and the moment of inertia of a propeller. A desirable elastic coupling for the marine drive shaft is selected based on the criterion. The marine drive system is assembled by using a flywheel, a marine reverse and reduction gear, and an elastic coupling, whose property is changeable, lying between an input shaft of the marine reverse and reduction gear and the flywheel.

Method to assemble marine drive system, and marine propulsion apparatus

A power generating and propelling system of a vessel has an electric power generating device () installed between an internal combustion engine () and a transmission (). A stator () of the generating device () is built in a flywheel housing () of the internal combustion engine () or a casing () connected to the flywheel housing (). A rotary shaft of the generating device () is disposed coaxially or eccentrically parallel to a crankshaft () of the internal combustion engine () or an input shaft () of the transmission () in the same direction with the crankshaft () of the internal combustion engine ().

Power generating and propelling system of vessel

In carrying out a crash-go-astern operation for switching operating means ( ) of a hydraulic clutch mechanism ( ) provided to a marine reduction and reverse gear ( ) from a forward setting (F) to a reverse setting in a stroke so as to abruptly stop in traveling ahead, a propeller speed (PN) is detected in neutral (N) halfway through the switching and initial fitting pressure (Po) of a reverse driving clutch ( ) is calculated by using a map of the initial fitting pressure (Po) of reverse clutch pressure (Pr) formed according to the propeller speed based on a ship load (SL) in advance before switching to the reverse setting (R), the reverse driving clutch ( ) is set at the calculated initial fitting pressure (Po) when the operating means is switched to the reverse setting (R), and then the reverse clutch pressure (Pr) is increased to a maximum value (Pm) as an engine speed (EN) increases.

Method of hydraulically controlling a marine speed reducing and reversing machine in crash astern operation

Growing community of inventors

Osaka, Japan

Toshio Imanaka