JPH0680851U - Fuel pump device in fuel injection device - Google Patents

Abstract

(57) [Summary] [Purpose] Easy installation on the engine and workability of piping,
To obtain a fuel pump device in a compact fuel injection device. A fuel pump P is arranged so as to project on the one end surface 1A of the base body 1, and a filter cup 4 is arranged so as to surround the outer circumference of the fuel pump P. An opening is formed on the one end surface 1A of the base body 1. One end 2B of the fuel intake passage 2
The fuel pump P is opened so as to face the inside of the upstream chamber 7A formed by the filter cup 4 and the filtering member 6, and the suction passage P1 of the fuel pump P is opened to the downstream chamber 7B formed inside the filtering member 6. The discharge path P2 of P is connected to the one end face 1A of the base body 1.
It is connected to the other end 3A of the fuel discharge passage 3 opening upward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel injection device that filters fuel in a fuel tank by a filter and injects fuel pressurized by a fuel pump toward an engine from an injector, and in particular, a fuel in a fuel tank. The present invention relates to a fuel pump that pressurizes and pumps fuel to an injector.

[0002]

[Prior art]

 A conventional fuel injection device is shown in FIGS. 2 and 3. Referring to the example of FIG. 2, T is a fuel tank in which fuel is stored, P is a fuel pump which is electrically driven to suck and discharge fuel, and F is included in the fuel sucked by the fuel pump P. A filter for removing foreign matters with a filtering member, and J is an injector for injecting fuel pressurized by the fuel pump P toward the engine E 1. The fuel pump P is arranged in the fuel tank T 1, and the filter F is connected to the suction passage P1 of the fuel pump P 1. On the other hand, the discharge passage P2 of the fuel pump P and the injector J arranged near the engine E are connected by the fuel discharge passage 30. That is, the fuel discharge passage 30 through which the pressurized fuel flows has a long passage length L1. Next, another example will be described with reference to FIG. Incidentally, since the respective parts constituting the device are the same, the same reference numerals are used. According to this example, the fuel pump P is arranged relatively close to the engine E, and the suction passage P1 of the fuel pump P (which is not arranged in the fuel tank T) and the fuel tank T are provided with a long passage provided with a filter F. The discharge passage P2 of the fuel pump P, which is connected by the fuel suction passage 31 having the passage length L2 and is arranged relatively close to the engine E, and the injector J, which is arranged relatively close to the engine E, are connected to each other. They are connected by a fuel discharge passage 30 having a short passage length L3. In such a fuel injection device, the device shown in FIG. 2 cannot be used as a fuel injection device for a ship. This is because the fuel discharge passage 30 through which the fuel pressurized by the fuel pump P flows is formed long L1.

[0003]

A fuel injection device according to the present invention relates to an improvement of the fuel injection device shown in FIG. 3, and an object thereof is to solve the following problems. That is, the fuel pump P and the filter F are respectively arranged in the fuel supply path system, which makes mounting and piping work thereof complicated and hinders installation and workability, which is not preferable. . Also, it is not preferable that each of them has to be mounted individually because it requires a lot of space for the arrangement and the degree of freedom in the layout of the device is hindered. In view of the above-mentioned problems, the fuel injection device according to the present invention is to provide a fuel pump device in a fuel injection device which has particularly good workability of mounting and piping and which can be compacted as a whole. is there.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the fuel pump device in the fuel injection device according to the present invention filters the fuel in the fuel tank with a filter having a filter member, and pressurizes the fuel pressurized by the fuel pump from the injector. In the fuel injection device for injecting and supplying the fuel to the fuel injection device, a fuel suction passage and a fuel discharge passage are bored, and one end of the fuel suction passage and a base main body in which the other end of the fuel discharge passage is opened on one end face are provided. Consists of a fuel pump that is driven mechanically to draw in and discharge fuel, and a filter cup that has a cylindrical filtering member inside in a substantially concentric manner.The fuel pump is projected onto one end surface of the base body. And the filter cup surrounding the outer periphery of the fuel pump, and one end of the fuel suction passage that opens on one end face of the base body is placed in the upstream chamber formed by the filter cup and the filtering member. The fuel pump suction passage opens to the downstream chamber formed inside the filter member, and the fuel pump discharge passage opens to one end surface of the base body. It is connected and arranged.

[0005]

[Action]

 A fuel pump and a filter are integrally arranged in the base body, and by arranging this base body near the engine, the fuel discharge passage through which the pressurized fuel passes can be shortened, and as a fuel injection device for ships. It is suitable. Furthermore, the connection piping between the fuel pump and the filter is not required and the assembly work can be done easily.

[0006]

【Example】

 Hereinafter, a fuel pump device in a fuel injection device according to the present invention will be described with reference to FIG. Reference numeral 1 denotes a base body, which is provided with a fuel intake passage 2 on the left side and a fuel discharge passage 3 on the right side. The other end 2A of the fuel intake passage 2 is open to the left side of the base body 1, one end 2B is opened to one end face 1A formed below the base body 1, and one end 3B of the fuel discharge passage 3 is the base body. 1 to the right side, and the other end 3A opens to the one end face 1A of the base body 1. The fuel pump P is well known in that it is electrically driven to suck the fuel from the suction passage P1 and pressurize it from the discharge passage P2 to discharge the fuel. The filter F is formed by closing an upper opening of a cylindrical filter cup 4 having a bottom with a closing plate 5 having a female screw hole 5A at its center and a through hole 5B around the female screw hole 5A. A cylindrical filter member 6 is arranged inside the filter cup 4 and the closing plate 5. The upstream chamber 7A is formed by the inner periphery of the filter cup 4 and the filter member 6, and the filter member 6 A downstream chamber 7B is formed inward.

The above-described fuel pump P and filter F are assembled to the base body 1 as follows. First, reference numeral 8 is a bottomed tubular pump support, which has a flange portion 8A facing laterally at the upper end thereof, a male screw 8B on the outer periphery of the upper portion, and a suction passage insertion hole 8C at the bottom portion. Set up. The fuel pump P is arranged in such a pump support body 8. At this time, the suction passage P1 of the fuel pump P is inserted into the suction passage insertion hole 8C, the lower end of the suction passage P1 projects downward from the bottom portion, and the discharge passage P2 Projects above the collar portion 8A. In this state, the collar portion 8A of the pump support 8 is attached to the one end surface 1A of the base body 1 via the screw 9. According to the above, the fuel pump P is arranged in the pump support body 8 attached to the base body 1, and the discharge passage P2 of the fuel pump P is arranged so as to be inserted into the other end 3A of the fuel discharge passage 3. The suction passage P1 is arranged so as to project downward from the bottom of the pump support 8. Next, the male screw hole 5A provided in the closing plate 5 of the filter F is screwed into the male screw 8B of the pump support 8, and the closing plate 5 of the filter F is screwed through the airtight ring 9 to the base body. 1 was fixedly arranged on one side end face 1A, and thus the fuel pump device was formed. The assembled state is shown in FIG. 1. According to the above-mentioned assembly, one end 2B of the fuel suction passage 2 is connected to the filter cup 4 through the through hole 5B formed in the closing plate 5 of the filter F. Is connected to the upstream chamber 7A formed by the filter member 6 and the suction passage P1 of the fuel pump P is connected to the inside of the filtration member 6 of the filter F, and the discharge passage P2 of the fuel pump P is connected to the fuel discharge passage P2. The other end 3A of the road 3 is connected. In the fuel pump device formed as described above, the base body 1 is fixedly disposed in the vicinity of the engine E as in the fuel pump shown in FIG. 3, and at this time, the other end 2 of the fuel intake passage 2 of the base body 1 is arranged. A is connected in the fuel tank T, and one end 3B of the fuel discharge passage 3 is connected to an injector J arranged in the vicinity of the engine E. Then, when the fuel pump P is driven, the fuel in the fuel tank T flows into the upstream chamber 7A from the fuel suction passage 2, foreign substances are removed by the filtering member 6 and the fuel flowing into the downstream chamber 7B is the fuel. It is sucked into the pump chamber from the suction passage P1 of the pump P and is supplied from the discharge passage P2 toward the injector J through the fuel discharge passage 3. According to the above, the fuel pump device and the injector J can be arranged in the vicinity of the engine E, respectively, so that the fuel pressurized by the fuel pump P is immediately supplied to the injector J, and the pressurized fuel is supplied. Since the passing fuel discharge path can be made extremely short, it is particularly suitable as a fuel injection device for ships. Further, the work of attaching to the engine does not require the work of attaching the fuel pump and the filter to the engine, and the base main body 1 can be simply attached to the engine E, and the work of attaching is extremely easy. . Further, since the fuel pump P and the filter F are integrally provided on the base body 1, the piping for the fuel pump P and the filter F is not necessary, which facilitates the piping work. is there .

[0008]

[Effect of device]

 As described above, according to the fuel pump device of the fuel injection device according to the present invention, by assembling the fuel pump and the filter into the base body, the whole device can be compacted and easily mounted on the device. In addition, the piping for the fuel pump and the filter is not required, and the efficiency of piping work can be achieved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a fuel pump device in a fuel injection device according to the present invention.

FIG. 2 is a system diagram showing a first example of a conventional fuel injection device.

FIG. 3 is a system diagram showing a second example of a conventional fuel injection device.

[Explanation of symbols]

 T Fuel tank F Filter P Fuel pump J Injector E Engine 1 Base body 2 Fuel intake passage 3 Fuel discharge passage 4 Filter cup 6 Filtering member

Claims (1)

[Scope of utility model registration request] 1. A fuel injection device for filtering fuel in a fuel tank by a filter having a filter member, and injecting fuel pressurized by a fuel pump from an injector to an engine. A discharge passage 3 is bored, one end 2B of the fuel suction passage 2 and the other end 3 of the fuel discharge passage 3 are formed.
A main body 1 having an opening A on one end face 1A, a fuel pump P that is electrically driven to suck and discharge fuel, and a filter cup 4 having a tubular filtering member 6 inside thereof in a substantially concentric manner. On the one end face 1A of the base body 1,
The fuel pump P is arranged so as to project, and the fuel pump P
A filter cup 4 is arranged so as to surround the outer periphery of the base body 1, and one end 2B of the fuel suction passage 2 that opens on one side end surface 1A of the base body 1 is placed in the upstream chamber 7A formed by the filter cup 4 and the filtration member 6. The fuel pump P has a suction passage P1 opened to the downstream chamber 7B formed inside the filtering member 6 and a discharge passage P2 of the fuel pump P opened to the one end surface 1A of the base body 1 as opposed to each other. A fuel pump device in a fuel injection device, which is connected to the other end 3A of the fuel discharge passage 3.