Hydrostatic propulsion system for a marine vessel

Details Hydrostatic propulsion system for a marine vessel Hydrostatic propulsion system for a marine vessel

1999-03-02

2000-08-08

Morano, S. Joseph

Marine propulsion

Hydraulic fluid drive for propelling means

B63H 21165

Patent

active

060993677

ABSTRACT:
A hydrostatic marine propulsion system is provided with a valve that is able to bypass an infinitely variable amount of hydraulic fluid from a hydrostatic pump to bypass a hydrostatic motor which is used to drive a propeller shaft. The infinitely variable valve is connected between the hydrostatic pump and the hydrostatic motor with dual outlets which cause fluid to flow either to the hydrostatic motor or to a reservoir to be recycled through the hydrostatic pump. An engine control unit changes the amount of hydraulic fluid passing through the hydrostatic motor as a function of the operating condition of an engine which drives the hydrostatic pump. In this way, engine speed can be controlled during various modes of operation.

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