JPS58173767U

JPS58173767U - Fuel pressure regulator for fuel-injected internal combustion engines

Info

Publication number: JPS58173767U
Application number: JP7102082U
Authority: JP
Inventors: 松岡　広樹
Original assignee: トヨタ自動車株式会社
Priority date: 1982-05-14
Filing date: 1982-05-14
Publication date: 1983-11-19

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、本考案に係る燃料噴射式内燃機関の燃料圧力
調整装置の実施例が配設された、自動車用エンジンの電
子制御燃料噴射装置の構成を示す、一部ブロック線図を
含む断面図、第２図は、前記実施例で用いられているエ
アアシストインジェクタの構成を示す断面図、第３図は
、同じく、燃料系統を示す流れ図、第４図は、同じく、
圧力調整弁の構成を示す断面図、第５図は、同じく、デ
ジタル制御回路の構成を示すブロック線図、第６図は、
前記実施例及び従来例における、加速時のスロットル弁
開度と空燃比の変化状態の関係を比較して示す線図であ
る。１４・・・エアフローメータ、１８・・・吸気管、２２
・・・スロットル弁、２４・・・スロットルセンサ、２
６・・・サージタンク、２８・・・吸気マニホルド、３
０・・・エアアシストインジェクタ、３４・・・燃料タ
ンク、３６・・・燃料ポンプ、３８・・・燃料配管、４
０・・・圧力調整弁、４２・・・燃料リターン配管、４
４・・・エア制御弁、４６・・・アシストエア配管、５
４・・・クランク角センサ、６０・・・デジタル制御回
路、６２．６４・・・導管、６６・・・燃料フィルタ、
６８・・・ダンパ、７０・・・デリバリパイプ、７２．
　７４・・・絞り。FIG. 1 is a cross-sectional view including a partial block diagram showing the configuration of an electronically controlled fuel injection device for an automobile engine in which an embodiment of the fuel pressure regulating device for a fuel-injected internal combustion engine according to the present invention is disposed. 2 is a sectional view showing the configuration of the air assist injector used in the above embodiment, FIG. 3 is a flowchart showing the fuel system, and FIG. 4 is a flowchart showing the fuel system.
FIG. 5 is a cross-sectional view showing the configuration of the pressure regulating valve, and FIG. 6 is a block diagram showing the configuration of the digital control circuit.
FIG. 3 is a diagram comparing and showing the relationship between the throttle valve opening during acceleration and the state of change in the air-fuel ratio in the embodiment and the conventional example. 14... Air flow meter, 18... Intake pipe, 22
...Throttle valve, 24...Throttle sensor, 2
6...Surge tank, 28...Intake manifold, 3
0... Air assist injector, 34... Fuel tank, 36... Fuel pump, 38... Fuel piping, 4
0...Pressure regulating valve, 42...Fuel return piping, 4
4...Air control valve, 46...Assist air piping, 5
4... Crank angle sensor, 60... Digital control circuit, 62.64... Conduit, 66... Fuel filter,
68... Damper, 70... Delivery pipe, 72.
74...Aperture.

Claims

[Scope of utility model registration request]

(1) An air assist injector that opens in response to a valve opening time signal and injects fuel whose atomization has been promoted by assist air into an intake pipe, and a fuel pipe for supplying fuel to the air assist injector; A fuel injection type having a pressure regulating valve for maintaining the fuel pressure in the fuel pipe at a level higher than a reference pressure by a predetermined value, and an assist air pipe for supplying assist air to the vicinity of the nozzle of the air assist injector. A fuel pressure regulating device for a fuel injection type internal combustion engine, characterized in that the reference pressure applied to the pressure regulating valve is a composite pressure of an intake pipe pressure and a pressure in an assist air pipe.

(2) Fuel pressure in the fuel injection internal combustion engine according to claim 1, wherein the contribution rate of the pressure in the assist air pipe to the combined pressure is greater than the contribution rate of the intake pipe pressure. Adjustment device.

(3) According to claim 1 of the utility model registration claim, the contribution rate of the pressure in the assist air piping and the intake pipe pressure to the combined pressure is determined by the size of a throttle disposed in the middle of the pressure passage. The fuel pressure regulating device for the fuel-injected internal combustion engine described above.