JPS5867962U

JPS5867962U - Diesel engine fuel circulation system

Info

Publication number: JPS5867962U
Application number: JP1981196189U
Authority: JP
Inventors: 和夫高木
Original assignee: いすゞ自動車株式会社
Priority date: 1981-12-25
Filing date: 1981-12-25
Publication date: 1983-05-09

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図はディーゼルエンジンにおける従来の燃料循環管
路説明図、第２図は本案燃料循環装置の要部説明図、第
３図は同作動状態説明図である。２・・・燃料タンク、３・・・燃料フィードポンプ、４
・・・燃料フィルタ、５・・・燃料噴射ポンプ、６・・
・供給管路、７・・・燃料噴射ノズル、８・・・戻管路
、９゜１０・・・三方電磁切換弁、１２・・・排気マニ
ホルド、１３・・・加温管路、１４・・・連通管路、１
５・・・燃料温度センサ、１６・・・作動制御回路。FIG. 1 is an explanatory diagram of a conventional fuel circulation pipe in a diesel engine, FIG. 2 is an explanatory diagram of the main part of the fuel circulation system of the present invention, and FIG. 3 is an explanatory diagram of the same operating state. 2...Fuel tank, 3...Fuel feed pump, 4
... Fuel filter, 5... Fuel injection pump, 6...
・Supply pipe line, 7...Fuel injection nozzle, 8...Return pipe line, 9°10...Three-way electromagnetic switching valve, 12...Exhaust manifold, 13...Heating pipe line, 14.・Communication pipe, 1
5... Fuel temperature sensor, 16... Operation control circuit.

Claims

[Scope of utility model registration request]

In the fuel circulation line of a diesel engine,
A return pipe 8 that returns the fuel that has circulated through the fuel filter 4 or the fuel injection pump 5 or the fuel injection nozzle 7 to the fuel tank 2
When a three-way electromagnetic switching valve 9 is installed in the pile, another three-way electromagnetic switching valve 10 is installed downstream of this three-way electromagnetic switching valve 9, and the heating pipe has an intermediate portion close to the exhaust manifold 12. One end of 13 is connected to the three-way electromagnetic switching valve 9, and the other end is connected to the return pipe, the three-way electromagnetic switching valve 9.
and the three-way electromagnetic switching valve 10, and further has a lower end facing the inner bottom of the fuel tank 2, and communicates with the fuel feed pump 3, the fuel filter 4, and the fuel injection pump 5. 3 and fuel tank 2
A communication pipe 14 is provided with one end connected to the three-way electromagnetic switching valve 10, the other end of the communication pipe 14 is connected to the three-way electromagnetic switching valve 10, a fuel temperature sensor 15 is disposed in the supply pipe 6, The fuel temperature sensor 15 and the three-way electromagnetic switching valves 9, 10 are connected via an operation control circuit 16, and the return pipe 8 and the fuel tank 2 are communicated via these when the fuel temperature is higher than the lower limit fuel temperature. , a fuel for a diesel engine in which when the fuel temperature is below the lower limit fuel temperature, the heating pipe 13, the return pipe 8, the communication pipe 14, and the supply pipe 6 are communicated to maintain the fuel temperature at an appropriate value. Circulation device.