Title:
ジェット推進艇のエンジン制御装置
Document Type and Number:
Japanese Patent JP5004025
Kind Code:
B2
Abstract:
An engine control system, for controlling an engine of a jet-propulsion boat, includes a cavitation-control-mode determination unit, which starts a cavitation-control mode when an engine speed not faster than 3200 rpm is maintained for a predetermined time period. During a normal sailing operation, ignition timing is set by a first ignition-timing setting unit. Upon detection of a cavitation-control-mode by the cavitation-control-mode determination unit, an engine speed is raised up to a speed not slower than 3200 rpm, which makes an ignition-timing switching unit to select a second ignition-timing setting unit. The second ignition-timing setting unit retards the ignition timing for the normal sailing operation when the engine speed becomes 6500 rpm or faster. In addition to retardation of the ignition timing, a boost pressure control command upper-limit value is switched to a value at a startup operation, which is less than a value at the normal sailing operation.
Inventors:
Hiroshi Maeda
Dew mouth
Junji Higashiyama
Dew mouth
Junji Higashiyama
Application Number:
JP2008086951A
Publication Date:
August 22, 2012
Filing Date:
March 28, 2008
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F02P5/15; B63B35/73; B63H11/08; B63H21/14; F02D23/00
Domestic Patent References:
| JP11303719A | ||||
| JP63055367A | ||||
| JP10159698A | ||||
| JP2004324483A |
Attorney, Agent or Firm:
Kaori Tanaka
Michito Hiraki
Sanji Tanabe
Michito Hiraki
Sanji Tanabe