Clutch controller for a twin propeller marine propulsion unit

Details Clutch controller for a twin propeller marine propulsion unit Clutch controller for a twin propeller marine propulsion unit

1997-02-13

1998-08-11

Avila, Stephen

Marine propulsion

Screw propeller

Having transmission

440 86, B63H 2014

Patent

active

057919518

ABSTRACT:
A clutch controller and method for selectively engaging and disengaging one of the propellers in a twin propeller marine propulsion unit for a watercraft. The clutch controller is connected to a solenoid controlled valve to selectively engage and disengage one of a pair of counter-rotating propellers. The clutch controller includes a frequency-to-voltage converter which converts the engine speed to a voltage. The voltage based on the engine speed is compared to an upper limit such that the propeller is disengaged until the engine speed reaches the upper limit. Once the engine speed exceeds the specified upper limit, the second propeller is engaged. The clutch controller maintains engagement of the second propeller until the engine speed drops below a second intermediate limit. After falling below this intermediate limit, the second propeller is again disengaged. The clutch controller unit further includes a wiper offset circuit which allows the propeller to be initially engaged at a lower engine speed when the boat is being operated at wide open throttle positions. A bypass circuit compares the engine speed to a lower voltage such that the second propeller is engaged until the engine speed exceeds the lower limit, which is below idle engine speed.

REFERENCES:
patent: 2672115 (1954-03-01), Conover
patent: 2989022 (1961-06-01), Lundquist
patent: 3478620 (1969-11-01), Shimanckas
patent: 4793773 (1988-12-01), Kinouchi et al.
patent: 5030149 (1991-07-01), Fujita
patent: 5230644 (1993-07-01), Meisenburg et al.
patent: 5249995 (1993-10-01), Meisenburg et al.
patent: 5352141 (1994-10-01), Shields et al.
patent: 5366398 (1994-11-01), Meisenburg et al.
patent: 5376031 (1994-12-01), Meisenburg et al.
patent: 5403218 (1995-04-01), Onoue et al.
patent: 5449306 (1995-09-01), Nakayasu et al.
patent: 5514014 (1996-05-01), Ogino et al.
patent: 5520559 (1996-05-01), Nakgayasu et al.
patent: 5522703 (1996-06-01), Okamoto
patent: 5529520 (1996-06-01), Iwashita et al.
patent: 5599215 (1997-02-01), Jarvinen

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