JPS6398494U

JPS6398494U -

Info

Publication number: JPS6398494U
Application number: JP19365486U
Authority: JP
Priority date: 1986-12-18
Filing date: 1986-12-18
Publication date: 1988-06-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す要部断面図、
第２図は同上の作用説明図、第３図は非容積型燃
料ポンプの従来例を示す断面図、第４図は第３図
の要部断面図、第５図は同上の作用説明図である
。５……圧力室、８ａ……燃料入口、８ｂ……燃
料出口、２１……インペラ、２２……溝。 FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
Fig. 2 is an explanatory diagram of the same operation as above, Fig. 3 is a sectional view showing a conventional example of a non-displacement fuel pump, Fig. 4 is a sectional view of the main part of Fig. 3, and Fig. 5 is an explanatory diagram of the same operation. be. 5... Pressure chamber, 8a... Fuel inlet, 8b... Fuel outlet, 21... Impeller, 22... Groove.

Claims

[Scope of utility model registration request]

a pump housing forming a hollow cylindrical pressure chamber with a fuel inlet and a fuel outlet; and a pump housing provided in the pressure chamber and having a plurality of grooves formed in the outer circumferential portion, the outer circumferential wall having a substantially predetermined gap with the circumferential wall of the pressure chamber. an impeller disposed substantially concentrically with the pressure chamber, the impeller being rotationally driven to transport fuel from the fuel inlet to the fuel outlet through the groove. In a positive displacement fuel pump, the length of at least one groove in the rotational direction is
A non-positive displacement fuel pump for an internal combustion engine, characterized in that the grooves are formed with different lengths.