| 摘要 |
PURPOSE:To make shift operation so easy enough as well as to prevent afterburning from occurring, by detecting load if more than its specified one is imposed on a shift operating means, regulating a fuel supply to an internal combustion engine, and lowering this engine speed. CONSTITUTION:Operating physical force by a shift operating device 13 rotates a shift arm 9 of a forward-backward transfer mechanism 5 via a cable 12, a shift auxiliary mechanism 11 and a cable 10, engaging a dog clutch 8 with forward-backward gears 17 and 18 alternatively. Then, at the time of being selected to a neutral position from the engaged state, if a claw 19 of this dog clutch 8 is not pulled out because driving torque is large enough, a first lever 21 precedingly rotates against a spring 25 to a second lever 22, and thereby a shift detecting device 28 consisting of a sensor 27 and a magnet 26 is turned on. A controller closes thereby a rotary valve and regulates the supply of an air-fuel mixture, reducing the driving torque of an internal combustion engine 1. Thus, a shift operation is made easy and simultaneously afterburning at the time of an engine and speed drop is prevented from occurring. |
