HIGH-PRESSURE FUEL PUMP

• Main Authors: TANIE HISAFUMI, MATSUSHITA KOHEI, MIZOBUCHI YASUO, TOKUO KENICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 07.02.2019
• 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 provide a high-pressure fuel pump on which a suction valve is mounted for reducing noise while maintaining strength reliability.SOLUTION: The high-pressure fuel pump comprises: a suction valve which opens/closes a channel; a seat part where the suction valve is seated; a stopper part which regulates movements of the suction valve toward an opposite side of the seat part in valve opening; and a rod which is configured separately from the suction valve and energizes the suction valve towards the stopper part. In the high-pressure fuel pump, the suction valve is formed from a central portion; and an outer peripheral portion which is formed radially outside of the central portion from a downstream face of the central portion to an upstream side and of which the axial thickness is reduced with respect to the central portion.SELECTED DRAWING: Figure 2 【課題】強度信頼性を保ったまま騒音を低減する吸入弁を搭載した高圧燃料ポンプを提供する。【解決手段】本発明の高圧燃料ポンプは、流路を開閉する吸入弁と、前記吸入弁が着座するシート部と、開弁時に前記吸入弁の前記シート部と反対側に向かう動きを規制するストッパ部と、前記吸入弁と別体に構成され前記吸入弁を前記ストッパ部に向かって付勢するロッドと、を備えた高圧燃料ポンプにおいて、前記吸入弁は、中央部と、前記中央部の径方向外側において前記中央部の下流面から上流に向かって形成されるとともに前記中央部に対して軸方向厚みが薄くなる外周部とで形成された。【選択図】図２