Marine propulsion shift control

Details Marine propulsion shift control Marine propulsion shift control

2008-05-27

2008-05-27

Vasudeva, Ajay (Department: 3617)

Marine propulsion

Engine, motor, or transmission control means

C440S086000, C477S115000

Reexamination Certificate

active

07377827

ABSTRACT:
A marine propulsion system that utilizes a transmission shift sequence to control shifting of the propulsion system transmission between forward and reverse gears. The marine propulsion system includes a controller that executes the transmission shift sequence using engine speed and transmission fluid pressure signals to determine the timing of various steps in the shift sequence. The controller is connected to a shift actuator for the transmission and to an engine speed throttle to thereby control transmission shifting and engine speed as a part of the transmission shift sequence. By monitoring engine speed and transmission fluid pressure, and by controlling transmission shifting and engine speed settings, the transmission shift sequence can provide the operator with the ability to carry out quick shifts that will neither stall the engine nor damage the transmission clutch.

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