JPH02145659U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１〜３図は本考案のユニツトインジエクタに
係わるもので、第１図はユニツトインジエクタの
断面図、第２図は第１図に示す実施例の詳細作動
説明図、第３図は第１図のポペツト弁に作用する
流体力の説明図、第４〜９図は従来例で、第４図
は第３図応当図、第５図は第１図応当図、第６〜
８図はそれぞれ主要部作用説明図、第９図は第５
図のユニツトインジエクタの作動説明図である。 １……外部作動式プランジヤ、２……ポペツト
弁、３ａ……プランジヤ室、３ｂ……供給兼圧力
通路、３ｃ……排油溜、１２……ソレノイドステ
ータ、１３……アーマチユア。 Figures 1 to 3 relate to the unit injector of the present invention. Figure 1 is a sectional view of the unit injector, Figure 2 is a detailed operational explanatory diagram of the embodiment shown in Figure 1, and Figure 3 is a diagram showing the detailed operation of the embodiment shown in Figure 1. An explanatory diagram of the fluid force acting on the poppet valve in Figure 1, Figures 4 to 9 are conventional examples, Figure 4 corresponds to Figure 3, Figure 5 corresponds to Figure 1, and Figures 6 to 9.
Figure 8 is an explanatory diagram of the main parts, and Figure 9 is a diagram explaining the operation of the main parts.
FIG. 3 is an explanatory diagram of the operation of the unit injector shown in the figure. 1... Externally actuated plunger, 2... Poppet valve, 3a... Plunger chamber, 3b... Supply and pressure passage, 3c... Drain oil reservoir, 12... Solenoid stator, 13... Armature.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 往復動ポンプの機能を有する外部作動式プラン
ジヤ１が設けられ、該プランジヤの一端に形成さ
れたプランジヤ室３ａより吐出行程中に燃料を排
出し、吸入行程中に燃料を該プランジヤ室に吸込
む構造を有し、さらに該プランジヤ室の下方に燃
料噴射弁１０が設けられている電磁式ユニツトイ
ンジエクタにおいて；前記プランジヤ室３ａと低
圧燃料源２４あるいはドレン用燃料通路３ｅに連
通する排油溜３ｃを相互に連通する供給兼圧力通
路３ｂと；該供給兼圧力通路と前記排油溜の間に
設けられ該供給兼圧力通路を開閉する直円筒形ポ
ペツト弁２と；供給兼圧力通路３ｂのポペツト弁
軸部案内孔３ｆ側にハウジング３に形成した環状
溝２１と；該ポペツト弁のステム側端面に固定さ
れたアーマチユア１３と；該アーマチユアの反ポ
ペツト弁側に設けられ、該ポペツト弁を引き上げ
て該ポペツト弁を閉鎖するソレノイドステータ１
２と；前記ポペツト弁２を作動解放させ、そのま
まの状態を保持するスプリング１５とを有してな
る電磁式ユニツトインジエクタ。 An externally actuated plunger 1 having the function of a reciprocating pump is provided, and has a structure in which fuel is discharged from a plunger chamber 3a formed at one end of the plunger during a discharge stroke, and fuel is sucked into the plunger chamber during a suction stroke. In the electromagnetic unit injector, which is further provided with a fuel injection valve 10 below the plunger chamber; a supply/pressure passage 3b communicating with; a right cylindrical poppet valve 2 provided between the supply/pressure passage and the drain oil reservoir for opening and closing the supply/pressure passage; a poppet valve shaft of the supply/pressure passage 3b; an annular groove 21 formed in the housing 3 on the side of the guide hole 3f; an armature 13 fixed to the end face of the poppet valve on the stem side; Solenoid stator 1 that closes the valve
2; and a spring 15 for operating and releasing the poppet valve 2 and maintaining the same state.