JPS63146159U

JPS63146159U -

Info

Publication number: JPS63146159U
Application number: JP3715587U
Authority: JP
Priority date: 1987-03-16
Filing date: 1987-03-16
Publication date: 1988-09-27

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す概略図、第２
図はより具体的に示す構成図、第３図は第１の燃
料ポンプの詳細断面図（第４図の―断面図）
、第４図は第３図の―断面図、第５図は第２
の燃料ポンプの詳細断面図（第６図の―断面
図）、第６図は第５図の―断面図、第７図は
第２の燃料ポンプの作動を制御する場合のシステ
ム図、第８図はそのフローチヤートである。１……第１の燃料ポンプ、２……第２の燃料ポ
ンプ、３……燃料タンク、４……燃料ダンパ、１
４……インペラ、１５……吸込口、１７……吐出
口、１８……バイパス通路、１９……逆止弁、２
４……ロータ、２５……ローラ、２６……吸込口
、２７……吐出口、２８……バイパス通路、２９
……逆止弁。 Figure 1 is a schematic diagram showing one embodiment of the present invention;
The figure shows a more specific configuration diagram, and Figure 3 is a detailed sectional view of the first fuel pump (cross-sectional view of Figure 4).
, Fig. 4 is a sectional view of Fig. 3, and Fig. 5 is a cross-sectional view of Fig. 2.
6 is a detailed cross-sectional view of the fuel pump in FIG. 6 (cross-sectional view in FIG. 6), FIG. The figure is a flowchart. DESCRIPTION OF SYMBOLS 1...First fuel pump, 2...Second fuel pump, 3...Fuel tank, 4...Fuel damper, 1
4... Impeller, 15... Suction port, 17... Discharge port, 18... Bypass passage, 19... Check valve, 2
4...Rotor, 25...Roller, 26...Suction port, 27...Discharge port, 28...Bypass passage, 29
……non-return valve.

Claims

[Scope of utility model registration request]

In a fuel supply system for an internal combustion engine in which fuel from a fuel tank is inhaled and discharged by a fuel pump and supplied to a fuel supply section to the engine, two fuel pumps are provided and connected in series, and each fuel pump has a suction port. 1. A fuel supply device for an internal combustion engine, characterized in that a bypass passage is provided for communicating between the intake port and the discharge port, and each bypass passage is provided with a check valve that allows flow only from the suction port side to the discharge port side.