JPH0347459U - - Google Patents

Description

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

第１図ないし第８図は本考案の実施例に係り、
第１図はフユーエルインジエクタの全体構成を示
す縦断面図、第２図は第１図のフユーエルインジ
エクタを―線矢視方向から見た縦断面図、第
３図は第１図の―線矢視方向から見た縦断面
図、第４図は第１図の―線矢視方向から見た
縦断面図、第５図は第１図の―線矢視方向か
ら見た縦断面図、第６図は積層圧電素子を示す斜
視図、第７図は第１の燃料通路を開閉制御する第
１の開閉弁における噴射パルス幅と燃料噴射量と
の関係を示す特性線図、第８図は第２の燃料通路
を開閉制御する第２の開閉弁における噴射パルス
幅と燃料噴射量との関係を示す特性線図、第９図
は従来技術に係るフユーエルインジエクタの縦断
面図である。 ２１……インジエクタ本体、２２……第１の燃
料通路、２３……第２の燃料通路、３０……噴射
ノズル、３５……第１の開閉弁、３９……第２の
開閉弁、４３，４４……積層圧電素子。 1 to 8 relate to embodiments of the present invention,
Fig. 1 is a longitudinal sectional view showing the overall configuration of the fuel injector, Fig. 2 is a longitudinal sectional view of the fuel injector shown in Fig. 1, viewed from the - line arrow direction, and Fig. 3 is a longitudinal sectional view of the fuel injector shown in Fig. 1. -A longitudinal cross-sectional view as seen from the line arrow direction, Figure 4 is a longitudinal cross-sectional view of figure 1 as seen from the line arrow direction, and Figure 5 is a longitudinal cross-section view of figure 1 as seen from the line arrow direction. 6 is a perspective view showing the laminated piezoelectric element, and FIG. 7 is a characteristic diagram showing the relationship between the injection pulse width and the fuel injection amount in the first on-off valve that controls opening and closing of the first fuel passage. Fig. 8 is a characteristic diagram showing the relationship between the injection pulse width and the fuel injection amount in the second on-off valve that controls opening and closing of the second fuel passage, and Fig. 9 is a longitudinal cross-sectional view of a fuel injector according to the prior art. It is. 21... Injector main body, 22... First fuel passage, 23... Second fuel passage, 30... Injection nozzle, 35... First on-off valve, 39... Second on-off valve, 43, 44...Laminated piezoelectric element.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 内部に大径な第１の燃料通路と小径な第２の燃
料通路が軸方向に設けられたインジエクタ本体と
、該インジエクタ本体内に位置して前記各燃料通
路をそれぞれ開閉するように設けられた第１、第
２の開閉弁と、該各開閉弁を介して前記第１、第
２の燃料通路と連通した噴射ノズルと、前記イン
ジエクタ本体内に位置して独立に通電可能に設け
られ、通電されたときには軸方向に歪み、前記第
１、第２の開閉弁をそれぞれ開弁する圧電素子と
から構成してなるフユーエルインジエクタ。 an injector body in which a large-diameter first fuel passage and a small-diameter second fuel passage are provided in the axial direction; and an injector body located within the injector body to open and close each of the fuel passages first and second on-off valves; an injection nozzle that communicates with the first and second fuel passages via the on-off valves; and a piezoelectric element that is distorted in the axial direction and opens the first and second on-off valves, respectively, when the fuel injector is turned on.