JPH0524954U - Fuel Assist Supply Device for Diesel Engine - Google Patents

Abstract

(57) [Summary] [Purpose] When increasing the amount of starting or starting operation at the beginning of leaving the warehouse,
A device for supplementarily supplying fuel directly to an intake passage of a diesel engine, which facilitates refueling work and eliminates intrusion of dust and the like into the intake passage. A fuel replenishing device 2 in which a fuel storage chamber 3 and a plunger chamber 4 are juxtaposed is provided in an intake passage 1, and a fuel tank 7 is communicated with the intake passage 1 via a fuel replenishing passage 8 and a fuel replenishing device 2 to form a plunger. By sliding operation of 10, fuel in the fuel tank 7 can be replenished from the plunger chamber 4 to the intake passage 1.
As a result, the fuel can be automatically replenished by the pumping action of the plunger 10, so that the operability such as increasing the starting amount becomes easy. Further, since the fuel is replenished from the fuel tank 7 to the intake passage 1 while being blocked from the outside, dust and the like from outside does not enter the intake passage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device that supplementally supplies fuel directly to the intake passage of a diesel engine at the time of increasing the amount of start-up or at the time of starting operation at the beginning of warehousing. Providing something that eliminates the hassle.

[0002]

[Prior Art]

 Prior art 1 of the auxiliary fuel supply device for increasing the starting amount is one in which an oil cup is provided in the intake passage of a diesel engine and a rubber plug is inserted into the inlet of the oil cup.

[0003] As the prior art 2, there is one in which the fuel overflowing from the fuel injection nozzle is accumulated in the fuel reservoir and then injected into the intake passage by jet start.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional technique 1, the amount of refueling of the fuel is not known, and if the fuel is excessively supplied, the blue and white smoke of the engine does not disappear for a long time. Further, if the rubber stopper is forgotten to be tightened, dust may enter the combustion chamber, and if the stopper is loosely connected, fuel leakage may occur.

In the above-mentioned conventional technique 2, there is a problem that it is difficult to inject fuel into the intake passage unless the fuel tank is higher than the inlet of the intake passage. An object of the present invention is to appropriately supplement auxiliary fuel at the time of increasing the amount of start-up and the like to prevent dust from entering the intake passage.

[0006]

[Means for Solving the Problems]

 Means for achieving the above object will be described below with reference to the drawings illustrating an embodiment. That is, the present invention 1 is provided with the fuel supply device 2 in the intake passage 1 of the diesel engine E, and the fuel supply device 2 is configured by arranging the fuel introduction means 3 and the fuel guide means 6 side by side in the lateral direction. The injection chamber 4 of the introduction means 3 is communicated with the outside of the engine E through the injection port 5, and the opening / closing valve 10 is provided at the valve opening 8 of the valve chamber 7 of the fuel guide means 6 so as to be opened and closed. 1 through a fuel discharge passage 11, the injection chamber 4 of the fuel introduction means 3 through a fuel guide passage 12 and a valve chamber 7 of the fuel guide means 6, and an opening / closing means 13 for opening / closing the valve 10. The auxiliary fuel supply device for a diesel engine is characterized in that it is provided outside the engine E.

The present invention 2 is provided with a refueling device 2 in an intake passage 1 of a diesel engine E, and the refueling device 2 is constituted by vertically connecting a fuel introducing means 3 and a fuel guiding means 6 in a vertical direction in series. The injection chamber 4 of the fuel introduction means 6 is communicated with the outside of the engine E through the injection port 5, and the injection plug 15 is inserted into and removed from the injection chamber 4 so that the valve chamber 7 of the fuel guide means 6 can be inserted. The valve opening 8 is communicated with the injection chamber 4 of the fuel introducing means 3 through the fuel guide passage 12, and the opening / closing valve 10 facing the valve opening 8 is opened and closed by the elastic pressure means 14 to close the valve. When the lower portion of the chamber 7 is connected to the intake passage 1 through the fuel outlet passage 11 and the injection plug 15 is pushed into the injection chamber 4 of the fuel introduction means 3, the fuel pressure in the injection chamber 5 causes the elastic pressure means 14 to operate. The on-off valve 10 is opened against the elastic pressure, and the fuel guided from the injection chamber 4 to the valve chamber 7 is discharged. The fuel auxiliary supply system for a diesel engine is characterized in that the intake passage 1 is replenished from the passage 11.

[0008]

[Action]

 (1) In the present invention 1, when the fuel is supplied to the injection chamber 4 of the fuel introducing means 3 and the opening / closing valve 10 is opened by the opening / closing operation means 13, the fuel in the injection chamber 4 flows from the fuel guide passage 12 to the valve chamber 7 And is introduced into the intake passage 1 via the fuel outlet passage 11. Therefore, if the injection chamber 4 is specified and formed to have an appropriate capacity, an appropriate fuel can be supplied to the diesel engine E from the auxiliary fuel supply device. Further, when the replenishing operation is not performed, since the opening / closing valve 10 closes the valve opening 8 of the valve chamber 7, dust or the like does not enter the intake passage 1. On the contrary, since the on-off valve 10 continues to be closed after the replenishing operation, there is no fear that fuel will leak from the intake passage 1 to the outside.

(2) In the present invention 2, when the fuel is supplied to the injection chamber 4 of the fuel introduction means 3 and the injection plug 15 is pushed into the injection chamber 4, the fuel pressure in the injection chamber 5 increases and the elastic pressure is increased. Since the elastic force of the means 14 is overcome, the on-off valve 10 opens. The fuel in the injection chamber 4 is guided from the valve opening 8 to the valve chamber 7 through the fuel guide passage 12, and is supplied to the intake passage 1 through the fuel outlet passage 11. Therefore, as in the case of (1) above, if the injection chamber 4 is formed to have an appropriate capacity, an appropriate fuel can be replenished to the fuel auxiliary supply device. Further, as long as the injection plug 15 is not pushed in, the opening / closing valve 10 continues to be closed by the action of the elastic pressure means 14, so that even if the plug 15 is forgotten to be closed in the empty injection chamber 4, the open / close valve 10 absorbs gas through the valve chamber 7. Dust will not enter the passage 1.

[0010]

[Effect of the device]

 (1) In both of the present inventions 1 and 2, since an appropriate amount of fuel can be supplemented to the intake passage by making the injection chamber have an appropriate capacity, bluish white smoke will not be generated due to excessive supply. (2) In both the present inventions 1 and 2, the opening / closing valve closes the opening regardless of whether the inlet is opened or closed, so external dust does not enter the intake passage, and the cylinder or piston ring is abnormal. Eliminate wear. On the contrary, there is no risk that the supplied fuel will leak to the outside from the intake passage. (3) In both the present inventions 1 and 2, the fuel is replenished by the opening / closing operation of the opening / closing operation means or the pushing operation of the injection plug, so that the fuel tank and the injection port are provided as in the prior art 2. Fuel can be smoothly supplied to the diesel engine without being affected by the positional relationship.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a fuel auxiliary supply system showing Embodiment 1, and FIG. 2 is a schematic front view of a vertical overhead valve diesel engine. As shown in FIG. 2, the fuel injection nozzle 17 is thrust into the cylinder head 16 of the vertical overhead valve diesel engine E toward the auxiliary combustion chamber, and the intake pipe 1 is fixed to the intake port of the cylinder head 16. A fuel tank 18 is attached to the side wall of the diesel engine E, and a loading boss 20 is provided on the intake pipe 1 (specifically, an intake manifold) so as to project upward, and the fuel supply device 2 is provided on the boss 20.

As shown in FIG. 1, the refueling device 2 is configured by arranging a fuel introducing means 3 and a fuel guiding means 6 side by side in a laterally adjacent manner, and is arranged on the right side of the loading boss 20. The introducing means 3 comprises an injection chamber 4 for storing fuel and a rubber stopper 19, and a fuel guide means 6 arranged on the left side of the loading boss 20 has a valve chamber 7 for guiding the fuel to the intake pipe 1 and a piston type opening / closing. And valve 10. That is, the valve chamber 7 and the injection chamber 4 are vertically arranged side by side on the left and right of the loading boss 20, the injection port 5 of the injection chamber 4 is communicated with the outside of the engine E, and the rubber plug 19 is attached to the injection port 5. Removably fit.

A valve support member 24 with a flange is screw-fitted to the valve chamber 7 to slidably support the piston-type on-off valve 10 on the valve support member 24, and the valve opening 8 at the bottom of the valve chamber 7 is The intake pipe 1 is communicated with the fuel outlet 11 and the injection chamber 4 of the fuel introducing means 3 is communicated with the valve chamber 7 via the upper and lower two fuel guide passages 12a and 12b. The needle valve portion 22 formed at the lower end portion of the opening / closing valve 10 faces the valve opening 8 so as to be able to open and close, and the piston portion 21 fixed to the middle portion of the opening / closing valve 10 is slidably brought into contact with the valve chamber 7, An elastic spring 23 is interposed between the support member 24 and the piston portion 21, and the needle valve portion 22 of the opening / closing valve 10 is urged to close the valve opening 8 by the elastic spring 23 to push and pull to the upper portion of the opening / closing valve 10. The knob 13 is provided in series and projects outside the engine E. When the opening / closing valve 10 descends and the needle valve portion 22 closes the valve opening 8, the piston portion 21 of the opening / closing valve 10 closes the outlet 25 of the lower fuel guide passage 12a and the upper fuel guide passage 12b. Open the doorway. Further, when the opening / closing valve 10 rises until it comes into contact with the valve support member 24, the piston portion 21 of the opening / closing valve 10 is configured to open the outlet 25 of the lower fuel guide passage 12a. Reference numeral 26 is an O-ring fixed to the knob 13, and reference numeral 27 is an air vent passage formed in the rubber plug 19.

Therefore, the function of the auxiliary fuel supply device of the first embodiment will be described. (1) When increasing the starting amount of the diesel engine E or starting the same at the beginning of warehousing, the starting fuel is injected into the injection chamber 4 of the fuel introducing means 3 set to the proper supply amount and the rubber plug 19 is fitted. .. The fuel is filled in the spring chamber 28 through the injection chamber 4 and the fuel guide passage 12b, but the piston portion 21 of the on-off valve 10 closes the outlet 25 of the lower fuel guide passage 12a. Do not invade. (2) When the push / pull operation knob 13 is pulled up against the elastic spring 23, the needle valve portion 22 of the opening / closing valve 10 opens to the valve port 8, and the piston portion 21 is opposed to the fuel guide passage outlet 25. Since the volume of the spring chamber 28 is reduced, the fuel in the injection chamber 4 flows into the valve chamber 7 from the fuel guide passage 12a and is replenished to the intake pipe 1 via the fuel outlet passage 11 because the spring chamber 28 is opened. That is, when the starting fuel is replenished by the auxiliary supply device, an appropriate amount of fuel can be replenished to the suction pipe 1 by making the injection chamber 4 have an appropriate capacity, so that bluish white smoke is not generated due to excessive supply. Further, even if the rubber plug 19 is forgotten to be tightened to the inlet 5, the needle valve portion 22 and the piston portion 21 of the on-off valve 10 doubly block the inside of the intake pipe 1 from the outside, so that the intake pipe 1 is not dusted. Will not enter, and it will definitely prevent abnormal wear of the cylinder and piston ring. On the contrary, unless the push-pull operation knob 13 is pulled up, the intake pipe 1 is doubly sealed from the outside as described above, so that the supplied fuel does not leak to the outside.

FIG. 3 shows a second embodiment of the present invention, and like the first embodiment, in the fuel supply device 2 in which the fuel introducing means 3 and the fuel guiding means 6 are arranged side by side in the lateral direction, the fuel guiding means 6 The on-off valve 10 is changed from the push-pull operation type to the screw rotation operation type, and the lid 30 is attached to the inlet 5 of the fuel introducing means 3. That is, a screw hole 31 is formed in the loading boss 20 of the intake pipe 1, the on-off valve 10 is screwed into the screw hole 31, and the needle valve portion 22 is provided at the lower end of the on-off valve 10. An oil cup 33 is removably screw-fitted to the small hill portion 32 on the right side wall of the loading boss 20, the lid 30 is pivotably supported on the oil cup 33 so that the inside of the cup of the oil cup 33 can be opened and closed. To form. Reference numeral 34 is a valve slip-out prevention pin.

In the second embodiment, since the piston portion is omitted and only the needle valve portion 22 is provided in the opening / closing valve 10, the structure of the opening / closing valve 10 is simplified, and the injection chamber 4 is of the oil cup type, so that replenishment is performed. The capacity can be changed easily.

FIG. 4 shows a third embodiment of the present invention. In the first and second embodiments, the refueling device 2 is composed of a fuel introducing means 3 and a fuel guiding means 6 arranged side by side. In the third embodiment, the refueling device 2 is constructed by connecting the fuel introducing means 3 and the fuel guiding means 6 in a vertical direction in series. That is, the valve chamber 7 of the fuel guide means 6 is formed in the loading boss 20 of the intake pipe 1, and the oil cup 35 is detachably screwed above the valve chamber 7 to introduce the fuel into the cup of the oil cup 35. It is formed in the injection chamber 4 of the means 3. The valve opening 8 of the valve chamber 7 is opened in a tapered shape at the bottom of the oil cup 35, and the valve opening 8 communicates with the lower injection chamber 4 via the fuel guide passage 12. A rubber plug 15 for injection is inserted into the above-mentioned injection chamber 4 through the injection port 5 so that it can be taken in and out, and the inside of the injection chamber 4 can be almost filled with the plug 15 for injection. A ball valve 10 is loaded in the valve chamber 7, the ball valve 10 is urged to close the valve opening 8 by an elastic spring 14, and the lower portion of the valve chamber 7 is connected to the intake pipe 1 via a fuel outlet passage 11.

Therefore, the function of the third embodiment will be described. When the injection plug 15 is pushed into the injection chamber 4 of the fuel introducing means 3 filled with fuel, the fuel pressure in the injection chamber 5 rises to overcome the elastic pressure of the elastic spring 14 and the ball valve 10 opens. (See the solid line in Figure 4). The fuel flows from the valve opening 8 into the lower valve chamber 7 through the fuel guide passage 12, and is supplied to the intake passage 1 through the fuel outlet passage 11. In the third embodiment, the ball valve 10 is biased by the elastic spring 14 to close the valve unless the plug 15 for injection is pushed (see the phantom line in FIG. 4). Even if the plug 15 is forgotten to be tightened, no dust or the like will enter the intake pipe 1, and the supplied fuel will not leak outside.

FIG. 5 shows a fourth embodiment of the present invention, which is based on the fuel supply device 2 of the first embodiment and has an air vent plug 38 screwed into the injection chamber 4 of the fuel introduction means 3 to provide a fuel guide means. It is configured such that the valve chamber 7 of No. 6 can be replenished with fuel from the fuel tank 18 of the diesel engine E. That is, as shown by the phantom lines in FIGS. 5 and 2, the fuel tank 18 communicates with the valve chamber 7 through the replenishing pipe 40, and the injection chamber 4 communicates with the fuel tank 18 through the air bleeding pipe 39. Then, the fuel injection nozzle 17 is connected to the injection chamber 4 via the overflow pipe 41. Reference numeral 43 is an air vent passage.

In the fourth embodiment, the fuel is sent to the valve chamber 7 by the differential pressure of the fuel tank 18 installed at a high position, the piston type opening / closing valve 10 supplies the fuel to the intake pipe 1, and the engine E During operation, the surplus fuel of the fuel injection nozzle 17 flows into the injection chamber 4 through the overflow pipe 41, so that the surplus fuel can be used for increasing the starting amount. Further, the air in the overflow fuel of the injection nozzle 17 is removed by the air bleeding pipe 39 or the air bleeding plug 38. However, in the case where the air escape is bad, the plug 38 can be removed and the fuel can be directly supplied to the injection chamber 4.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of essential parts of a fuel auxiliary supply system showing a first embodiment.

FIG. 2 is a schematic front view of a vertical overhead valve diesel engine.

FIG. 3 is a view corresponding to FIG. 1 showing a second embodiment.

FIG. 4 is a view corresponding to FIG. 1 showing a third embodiment.

FIG. 5 is a view equivalent to FIG. 1 showing a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 intake path 2 refueling device 3 fuel introduction means 4 injection chamber 5 3 injection port 6 fuel guide means 7 6 valve chamber 8 7 valve opening 10 on-off valve 11 fuel discharge path 12 fuel guide path 13 opening / closing operation means 14 Repression means 15 Plug for injection E Diesel engine

Claims (2)

[Scope of utility model registration request] 1. A fuel supply device (2) is provided in an intake passage (1) of a diesel engine (E), and the fuel supply device (2) laterally connects a fuel introduction means (3) and a fuel guide means (6). The injection chambers (4) of the fuel introducing means (3) are arranged side by side adjacent to each other, and
An opening / closing valve (10) is provided at the valve opening (8) of the valve chamber (7) of the fuel guiding means (6) so as to be openable and closable by communicating with the outside of the engine (E) through the valve opening (8). ) To the intake passage (1) via the fuel outlet passage (11), and the injection chamber (4) of the fuel introducing means (3) through the fuel guide passage (12) to the valve of the fuel guide means (6). The opening / closing means (13) of the opening / closing valve (10) communicating with the chamber (7) is connected to the engine (E).
A fuel auxiliary supply device for a diesel engine, which is provided so as to project outside the vehicle. 2. A fuel supply device (2) is provided in an intake passage (1) of a diesel engine (E), and the fuel supply device (2) has a fuel introduction means (3) and a fuel guide means (6) oriented vertically. The injection chamber (4) of the fuel introduction means (6) is formed by connecting the fuel injection means (6) in series.
It communicates with the outside of the engine (E) via (5),
A plug (15) for injection is inserted into (4) so that it can be taken in and out, and a valve port (8) of a valve chamber (7) of a fuel guide means (6) is inserted into a fuel guide passage (12).
The on-off valve (10) communicating with the injection chamber (4) of the fuel introducing means (3) through the valve opening (8) so as to open and close the valve opening (8)
The valve is closed and urged at (14), and the lower portion of the valve chamber (7) is connected to the fuel outlet passage (1
When the injection plug (15) is pushed into the injection chamber (4) of the fuel introduction means (3) by communicating with the intake passage (1) via 1), the fuel pressure in the injection chamber (5) is suppressed. The on-off valve (1) 0 is opened against the elastic force of the means (14), and the fuel guided from the injection chamber (4) to the valve chamber (7) is transferred from the fuel discharge passage (11) to the intake passage (1). ) Is a fuel auxiliary supply device for a diesel engine.