Control device for engine of boat

• US 20050284446A1
• Filed: 10/29/2004
• Published: 12/29/2005
• Est. Priority Date: 06/28/2004
• Status: Active Grant

• Current Assignee: Yamaha Marine Kabushiki Kaisha
• Original Assignee: Yamaha Marine Kabushiki Kaisha
• Inventors: Okuyama, Takashi
• Granted Patent: US 7,021,283 B2
• Time in Patent Office: Days
• US Class Current: 123/350
• CPC Class Codes: B63H 20/00 Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
• CPC Class Codes: B63H 21/22 the propulsion power units being controlled from exterior of engine room, e.g. from navigation bridge; Arrangements of order telegraphs
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 41/2464 Characteristics of actuators
• CPC Class Codes: F02D 41/2477 characterised by the method used for learning

Abstract

A throttle opening command value setting device for setting a throttle opening command value, a throttle control device for controlling a throttle valve of an engine based on a throttle opening command value set by the throttle opening command value setting means, and an engine speed detecting device for detecting the engine speed of the engine are provided. The throttle control device learns and controls the throttle opening based on the deviation of the throttle opening command value set by the throttle opening command value setting device from a target throttle opening corresponding to the engine speed detected by the engine speed detecting device.

Claims

1. A control device for an engine of a boat, comprising a throttle opening command value setting module configured to set a throttle opening command value, a throttle control module configured to control a throttle valve of the engine based on a throttle opening command value set by the throttle opening command value setting module, and an engine speed detecting device configured to detect the engine speed of the engine, wherein the throttle control module is configured to learn and control the throttle opening based on the deviation of the throttle opening command value set by the throttle opening command value setting module from a target throttle opening corresponding to the engine speed detected by the engine speed detecting device.

2. The control device for an engine of a boat of claim 1, wherein the throttle control module comprises a throttle opening command value distribution measuring module configured to measure a frequency distribution of a throttle opening command value set by the throttle opening command value setting module, and a resolution in the throttle opening command value range which has a high frequency distribution as measured by the throttle opening command value distribution measuring module is enhanced.

3. The control device for an engine of a boat of claim 2, wherein the throttle control module comprises a response characteristic setting module configured to set the response characteristic of an actual throttle opening of the throttle valve depending on the throttle opening command value set by the throttle opening command value setting module, and a throttle opening target value setting module configured to set a throttle opening target value depending on the response characteristic set by the response characteristic setting module and to change a position of the throttle valve in accordanc with the throttle opening target value.

4. The control device for an engine of a boat of claim 1, wherein the throttle control module comprises a response characteristic setting module configured to set the response characteristic of an actual throttle opening of the throttle valve depending on the throttle opening command value set by the throttle opening command value setting module, and a throttle opening target value setting module configured to set a throttle opening target value depending on the response characteristic set by the response characteristic setting module and to change a position of the throttle valve in accordanc with the throttle opening target value.

5. A control device for an engine of a boat, comprising throttle opening command value setting means for setting a throttle opening command value, throttle control means for controlling a throttle valve of the engine based on a throttle opening command value set by the throttle opening command value setting means, and engine speed detecting means for detecting the engine speed of the engine, wherein the throttle control means learns and controls the throttle opening based on the deviation of the throttle opening command value set by the throttle opening command value setting means from a target throttle opening corresponding to the engine speed detected by the engine speed detecting means.

6. The control device for an engine of a boat of claim 5, wherein the throttle control means comprises throttle opening command value distribution measuring means for measuring the frequency distribution of the throttle opening command value set by the throttle opening command value setting means, and the resolution in the throttle opening command value range which has a high frequency distribution as measured by the throttle opening command value distribution measuring means is enhanced.

7. The control device for an engine of a boat of claim 6, wherein the throttle control means comprises response characteristic setting means for setting the response characteristic of the actual throttle opening of the throttle valve depending on the throttle opening command value set by the throttle opening command value setting means, and throttle opening target value setting means for setting a throttle opening target value depending on the response characteristic set by the response characteristic setting means and outputting the throttle opening target value to the throttle valve.

8. The control device for an engine of a boat of claim 5, wherein the throttle control means comprises response characteristic setting means for setting the response characteristic of the actual throttle opening of the throttle valve depending on the throttle opening command value set by the throttle opening command value setting means, and throttle opening target value setting means for setting a throttle opening target value depending on the response characteristic set by the response characteristic setting means and outputting the throttle opening target value to the throttle valve.