Unlock instant, AI-driven research and patent intelligence for your innovation.

fuel supply device

A fuel supply device and fuel technology, applied to fuel injection devices, liquid fuel feeders, fuel injection pumps, etc., can solve the problems of increasing the diameter of the piston 47, the inability to realize the miniaturization of the device, and increasing the movement of the piston 47 , to achieve the effect of not easy eddy current

Inactive Publication Date: 2012-02-22
MITSUBISHI ELECTRIC CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0040] In addition, when steam is generated in the pressurization chamber 95, the volumetric efficiency decreases, and in order to avoid insufficient discharge of fuel from the fuel pump 84, it is necessary to increase the movement amount of the piston 47 or to increase the diameter of the piston 47.
That is to say, the conventional fuel supply device 80 needs to use a large fuel pump 84, and the miniaturization of the device cannot be achieved.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • fuel supply device
  • fuel supply device
  • fuel supply device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0096] figure 1 It is a block diagram of a fuel supply system including a fuel supply device according to Embodiment 1 of the present invention, figure 2 is a cross-sectional view of the fuel supply device according to Embodiment 1 of the present invention, image 3 It is an exploded perspective view of the main part of the cylinder block and valve assembly of the fuel supply device according to Embodiment 1 of the present invention, Figure 4 It is an enlarged cross-sectional view of a main part of the valve assembly of the fuel supply device according to Embodiment 1 of the present invention, showing a state in which the valve portion has released the clogging of the suction hole and the discharge valve body has blocked the discharge hole, which corresponds to figure 2 A magnified view of part A. Figure 5 This is an enlarged cross-sectional view of a main part of the valve assembly of the fuel supply device according to Embodiment 1 of the present invention, showing a ...

Embodiment approach 2

[0186] Figure 12 The relationship between the pump rotational speed and the volumetric efficiency of the fuel supply device according to Embodiment 2 of the present invention is expressed by using the ratio of the groove width to the groove depth at the portion between the suction hole of the groove passage portion and the cylinder as a parameter picture.

[0187] The configuration of the fuel supply device according to the second embodiment is the same as that of the first embodiment described above.

[0188] Hereinafter, a cross section perpendicular to the extending direction of the suction groove 53 at the portion between the suction hole 42 and the cylinder 41 of the groove passage portion 53b will be described as a cross section of the groove passage portion 53b.

[0189] It has been known that when the cross-sectional area of ​​the groove passage portion 53b is the same, the smaller the difference between the groove width L and the depth H of the cross-section of the ...

Embodiment approach 3

[0203] Figure 13 is the relationship between the volume ratio of the booster chamber and the reaching pressure of the steam in the booster chamber when the volume of the steam in the booster chamber is 70% of the volume of the booster chamber in the fuel supply device according to Embodiment 3 of the present invention Diagram of the relationship.

[0204] In addition, the structure of the fuel supply apparatus which concerns on this Embodiment 3 is the same as that of Embodiment 1 mentioned above.

[0205] As a function required for the in-line fuel supply device 10 , in addition to the excellent self-priming performance of the fuel from the fuel tank 2 , there is, for example, a function of avoiding vapor lock.

[0206] Here, the fuel supply device 10 is arranged in line between the fuel tank 2 and the fuel injection device 6 below the fuel tank 2 , and the fuel in the atmospheric pressure environment is sucked into the fuel storage chamber 15 from the suction port 14 . In...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A fuel supply device capable of preventing a reduction in volumetric efficiency by suppressing the amount of steam generated in a plenum chamber. The fuel supply device of the present invention includes: a cylinder body (40) formed with a cylinder (41) and a suction hole (42), a piston moving in the cylinder (41), a cylinder with a suction groove (53) and a discharge hole (52) Plate (51), suction valve plate (55) with cylinder connection hole (61) and suction valve core (57) for opening and closing suction hole (42), second protrusion (23) with discharge groove (27) Two body parts (20), and a discharge valve plate (66) with a discharge valve core (67) that opens and closes the discharge hole (52), and the suction valve core (57) has: a valve portion that opens and closes the suction hole (42) ( 58), and the valve part support part (59) extending from the valve part (58) toward the side opposite to the cylinder connection hole (61), the suction groove (53) includes: extending from the position opposite to the valve part (58) To the groove passage portion (53b) facing the cylinder connection hole (61), and the shallow groove portion (53a) facing the valve support portion (59) and having a groove depth shallower than the groove passage portion (53b).

Description

technical field [0001] The present invention relates to a fuel supply device for supplying fuel from a fuel tank to a fuel injection device using a piston pump. Background technique [0002] Due to environmental concerns such as global warming, restrictions on the fuel efficiency and exhaust gas of gasoline engines have been severe. In recent years, restrictions on small-displacement engines such as small two-wheeled vehicles have also been imposed. Against such a background, in order to improve the fuel efficiency of the engine and achieve exhaust gas purification, it is desired to supply the engines of four-wheeled vehicles and two-wheeled vehicles. The fuel supply system of fuel has been changed from a conventional mechanical system using a carburetor to an electronically controlled system, that is, a fuel injection system. [0003] In the case of an automobile, a large or medium-sized two-wheeled vehicle, or the like, an in-tank fuel supply device provided in a fuel tan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/00F02M69/00
CPCF02M59/462F02M37/20F02M37/08F02M55/00F02M59/04F04B1/0465F02M59/464
Inventor 尾岛宏一能濑慎也大西善彦
Owner MITSUBISHI ELECTRIC CORP