Control device for power trim unit for outboard engine

Details Control device for power trim unit for outboard engine Control device for power trim unit for outboard engine

2008-04-22

2008-12-09

Avila, Stephen (Department: 3617)

Marine propulsion

Means to control the supply of energy responsive to a sensed...

Reexamination Certificate

active

07462082

ABSTRACT:
A control device for a power trim unit for an outboard engine includes: a circuit that supplies a driving current to a power trim motor of the outboard engine from a DC power supply through an overcurrent protection switch and an H bridge circuit comprised of semiconductor switches; a trim angle control portion that performs control to cause a trim angle to reach a target value by performing PWM control of the driving current supplied from the DC power supply through the H bridge circuit to the power trim motor according to a deviation between the target value of the trim angle of the outboard engine and a trim angle detected by a trim angle sensor; and an overcurrent protection portion that turns off the overcurrent protection switch when overcurrent flows through the H bridge circuit.

REFERENCES:
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patent: 4778414 (1988-10-01), Taguchi
patent: 4813896 (1989-03-01), Koike et al.
patent: 5142473 (1992-08-01), Davis
patent: 5263432 (1993-11-01), Davis
patent: 6048234 (2000-04-01), Uematsu et al.
patent: 61-105296 (1986-05-01), None

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