JPS6317867U - - Google Patents

Description

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

第１図ないし第７図は本考案の実施例を示し、
第１図は本実施例による燃料噴射装置の全体構成
を示す系統図、第２図は絞り弁の回路構成図、第
３図は本実施例による絞り弁の具体的構成を示す
縦断面図、第４図は第３図中の―矢示方向断
面図、第５図は圧力レギユレータへの給気状態を
示す第３図による絞り弁の縦断面図、第６図は同
じく圧力レギユレータからの排気状態を示す第３
図による絞り弁の縦断面図、第７図は特性線図を
示し、第７図イは燃料ポンプの駆動電圧特性線図
、第７図ロは圧力レギユレータの燃料設定圧力特
性線図、第７図ハは燃料ポンプの吐出流量特性線
図、第８図ないし第１２図は従来技術を示し、第
８図は従来技術による燃料噴射装置の全体構成を
示す系統図、第９図は圧力レギユレータを示す縦
断面図、第１０図はチエツク弁の正常動作状態を
示す縦断面図、第１１図は同じくチエツク弁の閉
鎖状態を示す縦断面図、第１２図は特性線図を示
し、第１２図イは燃料ポンプの駆動電圧特性線図
、第１２図ロは圧力レギユレータの燃料設定圧力
特性線図、第１２図ハは燃料ポンプの吐出流量特
性線図である。 １……燃料タンク、３……燃料ポンプ、４……
チエツク弁、５……吐出配管、７……圧力レギユ
レータ、８……インジエクタ、９……供給配管、
１０……リターン配管、１１……インテイクマニ
ホールド、１２……制御圧配管、２１……絞り弁
。 1 to 7 show embodiments of the present invention,
FIG. 1 is a system diagram showing the overall configuration of the fuel injection device according to this embodiment, FIG. 2 is a circuit diagram of the throttle valve, and FIG. 3 is a longitudinal sectional view showing the specific configuration of the throttle valve according to this embodiment. Fig. 4 is a cross-sectional view in the direction of the - arrow in Fig. 3, Fig. 5 is a longitudinal cross-sectional view of the throttle valve according to Fig. 3 showing the state of air supply to the pressure regulator, and Fig. 6 is also a cross-sectional view of the exhaust air from the pressure regulator. 3rd to indicate condition
FIG. 7 shows a characteristic diagram, FIG. 7 A shows a drive voltage characteristic diagram of the fuel pump, FIG. Figure C is a discharge flow rate characteristic diagram of a fuel pump, Figures 8 to 12 show the conventional technology, Figure 8 is a system diagram showing the overall configuration of a fuel injection device according to the prior art, and Figure 9 shows a pressure regulator. 10 is a vertical sectional view showing the check valve in its normal operating state, FIG. 11 is a longitudinal sectional view showing the check valve in the closed state, FIG. 12 is a characteristic diagram, and FIG. 12A is a driving voltage characteristic diagram of the fuel pump, FIG. 12B is a fuel setting pressure characteristic diagram of the pressure regulator, and FIG. 12C is a discharge flow rate characteristic diagram of the fuel pump. 1...Fuel tank, 3...Fuel pump, 4...
Check valve, 5...Discharge piping, 7...Pressure regulator, 8...Injector, 9...Supply piping,
10... Return piping, 11... Intake manifold, 12... Control pressure piping, 21... Throttle valve.

補正 昭６１．９．３ 実用新案登録請求の範囲を次のように補正する
。Amendment September 3, 1981 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】 モータの回転によつて燃料を吐出し、該モータ
の停止時にも所定の残圧を保持するチエツク弁を
備えた燃料ポンプと、該燃料ポンプからの吐出燃
料をインテイクマニホールドによる空気吸込圧力
に応じて調圧する圧力レギユレータと、該圧力レ
ギユレータによつて調圧された燃料をエンジンに
噴射するインジエクタとからなる燃料噴射装置に
おいて、アクセルの戻し時に前記圧力レギユレー
タによる燃料設定圧力をを徐々に降圧させるため
に、前記インテイクマニホールドと圧力レギユレ
ータとの間の配管途中に該圧力レギユレータ内の
制御圧の排出のみを遅延せしめる絞り弁手段を設
けたことを特徴とする燃料噴射装置。[Scope of Claim for Utility Model Registration] A fuel pump equipped with a check valve that discharges fuel by the rotation of a motor and maintains a predetermined residual pressure even when the motor is stopped, and an intake of the discharged fuel from the fuel pump. In a fuel injection device consisting of a pressure regulator that regulates the pressure according to the air intake pressure by the manifold, and an injector that injects the fuel pressure regulated by the pressure regulator into the engine, the fuel set pressure by the pressure regulator when the accelerator is released. A fuel injection device, characterized in that a throttle valve means is provided in the piping between the intake manifold and the pressure regulator to delay only the discharge of the control pressure in the pressure regulator in order to gradually lower the pressure in the intake manifold.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] モータの回転によつて燃料を吐出し、該モータ
の停止時にも所定の残圧を保持するチエツク弁を
備えた燃料ポンプと、該燃料ポンプからの吐出燃
料をインテイクマニホールドによる空気吸込圧力
に応じて調圧する圧力レギユレータと、該圧力レ
ギユレータによつて調圧された燃料をエンジンに
噴射するインジエクタとからなる燃料噴射装置に
おいて、アクセルの戻し時に前記燃料ポンプの吐
出流量を徐々に降圧させるために、前記インテイ
クマニホールドと圧力レギユレータとの間の配管
途中に該圧力レギユレータ内の制御圧の排出のみ
を遅延せしめる絞り弁手段を設けたことを特徴と
する燃料噴射装置。 A fuel pump includes a check valve that discharges fuel as the motor rotates and maintains a predetermined residual pressure even when the motor is stopped; and the fuel pump discharges fuel according to the air suction pressure by the intake manifold. In a fuel injection device comprising a pressure regulator that regulates the pressure and an injector that injects the fuel pressure regulated by the pressure regulator into the engine, in order to gradually reduce the pressure of the discharge flow rate of the fuel pump when the accelerator is released, A fuel injection device characterized in that a throttle valve means is provided in the middle of a pipe between an intake manifold and a pressure regulator for delaying only the discharge of the control pressure in the pressure regulator.