JPS5924971U

JPS5924971U - Internal combustion engine fuel injection system

Info

Publication number: JPS5924971U
Application number: JP11949482U
Authority: JP
Inventors: 相原　久元
Original assignee: 日産自動車株式会社
Priority date: 1982-08-06
Filing date: 1982-08-06
Publication date: 1984-02-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の燃料噴射装置の構成を模式的に示す構成
説明図、第２図はその燃料供給圧と機関回転数との関係
を示す特性図、第３図はこの考案□　に係る燃料噴射装
置の構成を模式的に示す構成説明図である。２１・・・機関本体、２２・・・燃料タンク、２３・・
・電動式フィードポンプ、２７・・・メカニカルポンプ
、２８・・・逆止弁、２９・・・ダンパ、３１・・・燃
料噴射弁、３２・・・第１プレツシヤレギユレータ、３
３・・・リターン通路、３４・・・第２プレツシヤレギ
ユレータ、３５・・・バイパス通路、３６・・・第１電
磁弁、３７・・・リターン分岐通路、３８・・・第２電
磁弁、４０・・・コントロールユニット。第２図第３図Fig. 1 is a structural explanatory diagram schematically showing the structure of a conventional fuel injection device, Fig. 2 is a characteristic diagram showing the relationship between fuel supply pressure and engine speed, and Fig. 3 is a fuel injection device according to this invention. FIG. 2 is a configuration explanatory diagram schematically showing the configuration of an injection device. 21... Engine body, 22... Fuel tank, 23...
- Electric feed pump, 27... Mechanical pump, 28... Check valve, 29... Damper, 31... Fuel injection valve, 32... First pressure regulator, 3
3... Return passage, 34... Second pressure regulator, 35... Bypass passage, 36... First solenoid valve, 37... Return branch passage, 38... Second Solenoid valve, 40...control unit. Figure 2 Figure 3

Claims

[Scope of utility model registration request]

An electric feed pump that sucks fuel from a fuel tank, a mechanical pump that is driven by engine output and pressurizes the fuel discharged from the electric feed pump and supplies it to the fuel injection valve, and a mechanical pump that bypasses the mechanical pump. A bypass passage that directly communicates the feed pump discharge side and the fuel injection valve, a solenoid valve installed in the bypass passage, and a return for returning excess fuel not injected by the fuel injection valve to the fuel tank. An internal combustion engine comprising: a passage; a return branch passage that communicates the return passage with a mechanical pump suction side to directly supply the surplus fuel to the mechanical pump; and a solenoid valve interposed in the return branch passage. fuel injector.