EVAPORATED FUEL TREATMENT DEVICE FOR ENGINE

• Main Authors: YAMAUCHI TAKETOSHI, KATO JIRO, MUTSUYAMA KATSUYA, TAKAMI KENJI, YOSHIDA TAKESHI, TANAKA KAZUAKI
• Format: Patent
• Language: English; Japanese
• Published: 23.01.2020
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To inhibit evaporated fuel introduced into an intake passage 2 from leaking from a supercharger 3 to its downstream side during non-operation of the supercharger 3 of an engine.SOLUTION: An evaporated fuel treatment device for the engine includes the intake passage 2 where forward flows 91, 92 of intake air from a throttle valve 22 to the supercharger 3 and bypass directing flows 63, 94 of the intake air from the supercharger 3 side to a connection port 79 of a bypass passage 25 are produced during non-operation of the supercharger 3. An evaporated fuel introduction port 56 for introducing evaporated fuel generated in a fuel tank to the intake passage 2 is opened in the wall face of the intake passage 2 where the bypass directing flow 93 is produced.SELECTED DRAWING: Figure 8 【課題】エンジンの過給機３の非作動時に、吸気通路２に導入した蒸発燃料が過給機３からその下流側に洩れることを抑制する。【解決手段】過給機３の非作動時に、吸気がスロットル弁２２から過給機３に向かって流れる前進流９１，９２と、吸気が過給機３側からバイパス通路２５の接続口７９に向かって流れるバイパス指向流６３，９４とを生ずる吸気通路２を備え、燃料タンクで発生した蒸発燃料を吸気通路２に導く蒸発燃料導入口５６を吸気通路２におけるバイパス指向流９３を生ずる壁面に開口させる。【選択図】図８