| 摘要 |
PURPOSE:To minimize fuel consumption by detecting engine revolution speed N and controlling a propeller pitch to make a result from an expression K1NM+K2 (K1, K2 and M are constants) agree with a fuel injection pump rack gauge R on the basis of a boat speed indicated. CONSTITUTION:After converted in the form of a dc voltage by an input amplifier P12, a revolution speed N of an engine or a propeller is sent through an isolation amplifier A13 and a control start minimum speed setting circuit 4 successively to an arithmetic circuit 5 wherein the value N is thrown into an expression K1NM+K2 for calculation and the result is thereafter inputted into a comparison circuit 8. A voltage which corresponds to a location R of an engine fuel injection pump rack is on the other hand inputted into the comparison circuit 8 via an isolation amplifier A27. The output from the comparison circuit 8 is applied via a dead zone regulation circuit 9 and a time relay circuit 10 to a propeller pitch controller 13 for varying the propeller pitch, thereby offering a speed control instruction VS. |
