To provide an outboard engine capable of preventing a fuel pressure in a fuel supply passage from exceeding an upper limit after shutdown in a configuration to execute a feedback control of a fuel pomp.SOLUTION: An outboard engine 1 includes a vapor separator tank 38, a downstream fuel supply passage 40, a fuel pomp 39 to discharge a fuel of the vapor separator tank 38 into the downstream fuel supply passage 40, a downstream passage 43 and a downstream relief valve 44 provided in a downstream bypass passage 43. Both ends of the downstream bypass passage 43 are respectively connected to a downstream part 40E closer to a fuel injection device 41 than a downstream check valve 42 in the downstream fuel supply passage 40, and to an upstream part 40F between the downstream check valve 42 and the vapor separator tank 38 in the downstream fuel supply passage 40. A downstream relief valve 44 opens the downstream bypass passage 43 when the fuel pressure in a downstream region 40D closer to the fuel injection device 41 than the downstream check valve 42 exceeds the first specified value in the downstream fuel supply passage 40.SELECTED DRAWING: Figure 2

    【課題】燃料ポンプをフィードバック制御する構成において、運転停止後に燃料供給路内の燃圧が上限を上回ることを防止できる船外機を提供する。【解決手段】船外機1は、ベーパセパレータタンク38と、下流燃料供給路40と、ベーパセパレータタンク38の燃料を下流燃料供給路40に吐き出す燃料ポンプ39と、下流バイパス路43と、下流バイパス路43に設けられた下流リリーフ弁44とを含む。下流バイパス路43の両端は、下流燃料供給路40において下流逆止弁42よりも燃料噴射装置41に近い下流部40E、および、下流燃料供給路40において下流逆止弁42とベーパセパレータタンク38との間の上流部40Fにそれぞれ接続される。下流燃料供給路40において下流逆止弁42よりも燃料噴射装置41に近い下流領域40Dにおける燃圧が第1所定値を上回った場合には、下流リリーフ弁44が下流バイパス路43を開く。【選択図】図2


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    Title :

    OUTBOARD ENGINE


    Additional title:

    船外機


    Contributors:

    Publication date :

    2019-08-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



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