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Patent Searching and Data


Title:
CONTROL METHOD FOR MARINE ENGINE AND CONTROL DEVICE OF THE SAME
Document Type and Number:
Japanese Patent JP2013238247
Kind Code:
A
Abstract:

To improve fuel efficiency, by efficiently switching a fuel save mode and a normal mode.

A set rotation speed and an actual rotation speed are input in a controller 4. In a normal mode, a PID controller 12 calculates an output value to a fuel supply means of a marine engine 2 based on a difference between the set rotation speed and the actual rotation speed. The PID controller 12 also includes a fuel save mode for reducing a varying width in an output value per unit time compared to the normal mode. Detecting units 20, 22, 24, 26, 28 are provided for monitoring changes in a set rotation speed and an actual rotation speed. In the fuel save mode, when a set rotation speed and an actual rotation speed exceed predetermined conditions continuously for a predetermined time, the PID controller 12 is switched into the normal mode.


Inventors:
TAKAHASHI TOSHIKAZU
KAJIYAMA KATSUNORI
SHIGAKI TOMIO
Application Number:
JP2013171143A
Publication Date:
November 28, 2013
Filing Date:
August 21, 2013
Export Citation:
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Assignee:
NIPPON YUSEN KK
MTI KK
NABTESCO CORP
International Classes:
F02D41/14; B63H21/14; B63H21/21; F02D41/40; F02D45/00
Domestic Patent References:
JPH0431645A1992-02-03
JP2005090454A2005-04-07
Attorney, Agent or Firm:
Masatoshi Kimura