JPS59131571U

JPS59131571U - Dual fuel supply system for compression ignition engines

Info

Publication number: JPS59131571U
Application number: JP2500983U
Authority: JP
Inventors: 康夫佐藤
Original assignee: トヨタ自動車株式会社
Priority date: 1983-02-24
Filing date: 1983-02-24
Publication date: 1984-09-04
Also published as: JPH0114759Y2

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 drawings]

第１図は従来の複燃料供給装置の構成図、第２図は同上
装置の配管系統図、第３図は同上装置の動作タイムチャ
ート、第４図は同上装置の各噴射期間中の燃料挙動説明
図、第５図は本考案の第１実施例の構成図、第６図は同
上実施例における各噴射期間中の燃料挙動説明図、第７
図は燃料の噴射特性を示すグラフ、第８図は本考案の第
２実施例の噴射ノズルの縦断面図、第９図は同第３実施
例の噴射ノズルの縦断面図、第１０図は運転領域特性を
示すグラフである。３、　４．　５．　６．　７・・・噴射ノズル、１０・
・・補助燃料圧送装置、１３・・・主燃料ポート、１４
・・・補助燃料ポート、１５・・・噴孔、３１・・・主
燃料、３２・・・補助燃料、３４・・・圧力室、５５・
・・絞り、５６・・・チェックボール、５７・・・スプ
リング、５８・・・絞り、５９・・・ポペット弁、６０
・・・弁座、１００・・・連絡孔、１０１・・・盲栓。Figure 1 is a configuration diagram of a conventional dual fuel supply device, Figure 2 is a piping system diagram of the same device, Figure 3 is an operation time chart of the same device, and Figure 4 is fuel behavior during each injection period of the same device. Explanatory drawings, FIG. 5 is a configuration diagram of the first embodiment of the present invention, FIG. 6 is an explanatory diagram of fuel behavior during each injection period in the same embodiment, and FIG.
Figure 8 is a graph showing fuel injection characteristics, Figure 8 is a longitudinal sectional view of the injection nozzle of the second embodiment of the present invention, Figure 9 is a longitudinal sectional view of the injection nozzle of the third embodiment of the invention, and Figure 10 is It is a graph showing operating region characteristics. 3, 4. 5. 6. 7... Injection nozzle, 10.
...Auxiliary fuel pumping device, 13...Main fuel port, 14
... Auxiliary fuel port, 15... Nozzle hole, 31... Main fuel, 32... Auxiliary fuel, 34... Pressure chamber, 55...
... Throttle, 56... Check ball, 57... Spring, 58... Throttle, 59... Poppet valve, 60
... Valve seat, 100... Communication hole, 101... Blind plug.

Claims

[Scope of utility model registration request]

A dual fuel supply device for a compression ignition internal combustion engine that uses a compressed self-ignitable fuel as an auxiliary fuel and a compressed self-ignitable fuel as the main fuel, the auxiliary fuel pumping device supplying the auxiliary fuel to an injection nozzle; An injection nozzle has an auxiliary fuel port and a main fuel port that supply each of auxiliary fuel and main fuel within one injection nozzle, and uses the injection pressure of the main fuel to inject the auxiliary fuel into the injection cylinder of the main fuel. Then, the injection nozzles of other injection cylinders in the subsequent stroke, which will be the next main fuel injection order, are placed on standby to be filled, and the high-pressure injection of the main fuel of the injection cylinder in the subsequent stroke is used to perform the injection at the initial stage of the injection. , in the dual fuel supply device, which injects the auxiliary fuel that has been kept on standby before the main fuel so that the main fuel, which cannot be compressed and self-ignited, can be combusted by igniting the auxiliary fuel; A compression ignition internal combustion engine, characterized in that a check valve that opens only to the pressure chamber side is provided in an auxiliary fuel supply passage connecting an auxiliary fuel outlet side and an injection nozzle pressure chamber at a position immediately adjacent to the pressure chamber. Fuel supply device.