JPH10339237A - Injection stopping structure of distribution type fuel injection pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a mechanism to stop the fuel injection, and reduce the cost by opening/closing a part between a fuel supply passage to introduce the fuel from a fuel charge pump and a single fuel suction passage to be branched therefrom by a closing valve. SOLUTION: A double axis type distribution fuel injection pump is provided with a plunger 3 to be reciprocated by a cam 10a to be turned, and the fuel sucked and pressurized by the reciprocation is fed to a fuel injection valve of each cylinder through a delivery valve (a discharge valve) 6a for each cylinder of an internal combustion engine. An annular groove is recessed in an outer circumferential part of a plunger barrel 2 to form a reserve well C, and a fuel suction passage B is branched in an extended manner in the direction orthogonal to a fuel supply passage A by communicating the fuel wells. A closing valve V1 to be advanced/retracted by a solenoid 8 is provided in a seating manner on a valve seat provided on the fuel suction passage B, and the fuel supply is stopped by closing the closing valve V1 when the fuel injection is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-shaft type in which a distribution shaft drive shaft is arranged orthogonally to a camshaft for a diesel internal combustion engine, and a plunger and a distribution shaft are provided side by side so that they can be linked to each other by a bevel gear. A distributed fuel injection pump,
The present invention relates to a configuration for realizing a fuel injection stop function at low cost.

[0002]

2. Description of the Related Art Conventionally, a plunger-type distribution type fuel injection pump is provided with a single-shaft structure in which a plunger reciprocates and rotates and has a distribution function itself, and a plunger and a distribution shaft. There is a two-shaft structure. In a single-shaft structure, there is a structure in which fuel injection is stopped by closing a fuel supply hole to a plunger, but a two-shaft structure is close to the structure of a row-type fuel injection pump. For this reason, a mechanical structure is employed in which the metering section is forcibly moved in the fuel decreasing direction via a governor mechanism for speed regulation to stop fuel injection.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-cost mechanism capable of stopping fuel injection in a two-shaft distribution type fuel injection pump. In the conventional structure in which the injection stop is controlled by a governor that adjusts the fuel injection amount in accordance with the speed control means, that is, the set rotation speed,
A mechanism for forcibly operating the metering member to the injection stop position is required, resulting in a complicated structure and high cost. In the case of an electronic governor, it can be handled by transmitting a control signal for stopping injection, but the electronic governor itself is expensive. That is,
As the governor uses an inexpensive mechanical governor, it is required to provide an inexpensive injection stop means that does not rely on the forced operation of the governor.

[0004]

The present invention uses the following means in order to solve the above problems. First, first, a hydraulic base is internally fitted with a plunger barrel in which a plunger is fitted, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel delivered from the plunger to each delivery valve. Wherein the annular groove is recessed in the outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with the hydraulic base, and the fuel from the fuel charge pump is formed by the hydraulic base. A fuel supply path to be introduced, a single fuel suction path branched therefrom, and a reverse suction path from the distribution shaft are formed, and the fuel supply path is formed by the fuel suction path, the reverse suction path, and the plunger barrel. A port that communicates with the fuel reservoir is configured such that a portion between the fuel supply path and the fuel suction path can be opened and closed by a closing valve.

[0005] Second, a plunger barrel for fitting a plunger therein, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel pumped from the plunger to each delivery valve are fitted inside the hydraulic base. A distribution type fuel injection pump, wherein an annular groove is recessed in the outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with the hydraulic base, and the fuel from the fuel charge pump is formed by the hydraulic base. And a single fuel suction passage branching therefrom, and a reverse suction passage from the distribution shaft, formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. Port
In the fuel tank, the port between the fuel supply path and the fuel intake path can be opened and closed by a closing valve, and one of the ports of the plunger barrel is used as a spill port. In the above, the phase of the opening of the spill port is 90 ° or more apart from the openings of both the fuel suction path and the reverse suction path.

Third, a plunger barrel for fitting a plunger therein, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying the fuel pumped from the plunger to each delivery valve are fitted inside the hydraulic base. A distribution type fuel injection pump, wherein an annular groove is recessed in the outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with the hydraulic base, and the fuel from the fuel charge pump is formed by the hydraulic base. , A single fuel intake passage connected to the fuel supply passage, and a reverse suction passage from the distribution shaft, and the fuel suction passage, the reverse suction passage,
And a port formed by the plunger barrel communicating with the fuel reservoir, wherein the outlet of the fuel in the fuel supply path is unified with the fuel intake path, and the fuel supply path and the fuel intake path are connected to each other. Between the hydraulic base and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base to communicate with the fuel reservoir. Install a check valve.

Fourth, a plunger barrel for fitting a plunger therein, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel pumped from the plunger to each delivery valve are fitted inside the hydraulic base. A distribution type fuel injection pump, wherein an annular groove is recessed in the outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with the hydraulic base, and the fuel from the fuel charge pump is formed by the hydraulic base. , A single fuel intake passage connected to the fuel supply passage, and a reverse suction passage from the distribution shaft, and the fuel suction passage, the reverse suction passage,
And a port formed by the plunger barrel communicating with the fuel reservoir, wherein the outlet of the fuel in the fuel supply path is unified with the fuel intake path, and the fuel supply path and the fuel intake path are connected to each other. Between the hydraulic base and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base to communicate with the fuel reservoir. A check valve is interposed, and one of the ports of the plunger barrel is used as a spill port to face the fuel discharge path.

Fifth, a plunger barrel for fitting a plunger therein, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel pumped from the plunger to each delivery valve are fitted inside the hydraulic base. A distribution type fuel injection pump, wherein an annular groove is recessed in the outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with the hydraulic base, and the fuel from the fuel charge pump is formed by the hydraulic base. , A single fuel intake passage connected to the fuel supply passage, and a reverse suction passage from the distribution shaft, and the fuel suction passage, the reverse suction passage,
And a port formed by the plunger barrel communicating with the fuel reservoir, wherein the outlet of the fuel in the fuel supply path is unified with the fuel intake path, and the fuel supply path and the fuel intake path are connected to each other. Between the hydraulic base and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base to communicate with the fuel reservoir. A check valve is interposed, and an accumulator function is added to the check valve.

[0009]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front sectional view of a two-shaft distribution type fuel injection pump, and FIG. 2 is a side sectional view of the same, showing a structure provided with an electromagnetic solenoid 8 for driving a closing valve V1.
FIG. 3 is a front cross-sectional view of a portion of the two-shaft distributing type fuel injection pump in which a pressure is supplied from the plunger 3 to the distributing shaft 5, and FIG. , FIG. 5 is a sectional view taken along the line YY in FIG. 4, and FIG. 6 is a sectional view taken from the fuel supply path A to the fuel intake path B in a structure having a single plunger barrel port 2a. FIG. 3 is a cross-sectional view taken along line XX in FIG. 3, and FIG. 7 is a cross-sectional view taken along line Y に お け る Y in FIG. 8 is a cross-sectional view taken along line XX in FIG. 3 of a structure in which a fuel discharge passage H with a check valve V2 is provided in addition to the structure of FIG. 6, and FIG. 9 is a cross-sectional view taken along line YY in FIG. Reference numeral 10 denotes a check valve for the fuel discharge passage H, which is a check valve V with an accumulator function.
2 is a sectional view taken along line XX in FIG. 3, and FIG. 11 is a sectional view taken along line YY in FIG.

First, a schematic structure of a two-shaft distribution type fuel injection pump will be described with reference to FIGS. A cam shaft 10 connected to a pump drive shaft of a diesel internal combustion engine is supported in the pump drive housing 9, and a cam 10 a for driving a plunger and a gear 10 b for driving a distribution shaft are formed on the cam shaft 10. . A tappet mechanism 11 is pressed against the cam 10a, and a distribution shaft drive shaft 12 is meshed with the gear 10b. As shown in FIG. 2, a fuel charge pump 13 driven by the camshaft 10 is attached to the front of the pump drive housing 9, and fuel is introduced into the fuel charge pump 13 from a fuel tank.

FIG. 1 shows a side of the pump drive housing 9.
The governor housing 14 is connected to the camshaft 10 and the camshaft 10 which is rotatably supported in the pump drive housing 9 is inserted into the governor housing 14 to form a governor mechanism. The governor in this embodiment is a centrifugal mechanical governor, that is, a flyweight 15 is attached to the camshaft 10, and the flyweight 15 is adjusted according to the degree of opening of the flyweight 15 in proportion to the rotation speed of the camshaft 10. The governor rack 16 connected to the plunger 3 described later which fits inside the tappet mechanism 11
2 (shown in FIG. 2), the plunger 3 is rotated, and the amount of fuel pressure fed from the plunger 3 is adjusted. That is, the fuel injection amount is adjusted according to the engine speed.

The hydraulic base 1 is disposed on the pump drive housing 9, and the plunger barrel 2 and the distribution shaft sleeve 4 are fitted inside the pump drive housing 9 and the hydraulic base 1 so as to penetrate therethrough. And
The plunger 3 is slidably and rotatably fitted in the plunger barrel 2, and the plunger 3 is projected from the plunger barrel 2 in the pump drive housing 9 and is fitted and connected to the tappet mechanism 11. Plunger 3 to cam 10
It reciprocates by the rotation of a. On the other hand, the distribution shaft 5 is rotatably fitted in the distribution shaft sleeve 4, and the distribution shaft 5 protrudes from the distribution shaft sleeve 4 in the pump drive housing 9. connect. A delivery valve (discharge valve) 6 corresponding to the cylinder of the diesel internal combustion engine is further fitted in the hydraulic base 1, and a delivery holder 6a having each discharge port is protruded to the outside and disposed in each cylinder. Fuel is discharged and supplied to the fuel injection valve.

Further, as shown in FIG. 2, an electromagnetic solenoid 8 for controlling an on-off valve in a fuel supply path, which is a first feature of the fuel injection pump of the present invention, is fitted inside the hydraulic base 1 from the front side. I have.

The hydraulic base 1 is provided with an oil passage and various valves, and a port is provided in the plunger barrel 2, for example, to form a control mechanism for fuel pressure feeding from the plunger 3 to the distribution shaft 5. First, an embodiment of this control mechanism will be described with reference to FIGS. First,
As shown in FIG. 2, a fuel inlet port 9a for attaching a fuel supply pipe from the fuel charge pump 13 is formed in the pump drive housing 9, and an oil passage formed above the fuel inlet port 9a is hydraulically formed. The fuel passages are formed so as to communicate with oil passages formed in the base 1 in a vertically penetrating manner, and these oil passages form a fuel supply passage A. In the hydraulic base 1, a fuel outlet port 1a of the fuel supply path A is provided, and the fuel constantly pumped by the drive of the fuel charge pump 13 is returned from the fuel outlet port 1a to the fuel tank. Fuel is the fuel charge pump 13
The fuel is further circulated to the fuel tank via the fuel supply path A.

On the other hand, on the outer peripheral portion of the plunger barrel 2,
An annular groove is recessed to form a fuel reservoir C in a gap with the hydraulic base 1. A single-hole fuel intake passage B is branched and extended horizontally from the fuel supply passage A. Thus, a part of the open end is communicated with the fuel reservoir C. The plunger barrel 2 is provided with a plunger barrel port 2a used as a fuel suction port or a spill port. The plunger barrel 2 communicates a part of the outer end opening with a fuel reservoir C and a fuel suction passage B. They are in direct communication with each other.

The solenoid portion of the electromagnetic solenoid 8 is a closing valve V1 which can be seated on the valve seat 7 provided in the fuel suction passage B across the fuel suction passage B. The fuel in the fuel supply passage A flows into the fuel suction passage B when the closing valve V1 is opened, and the fuel is supplied to the plunger barrel port 2.
Through a, it is introduced into the plunger chamber D.

A fuel pressure feed passage E extends from the plunger chamber D through the plunger barrel 2, the hydraulic base 1, and the distribution shaft sleeve 4. Further, a fuel distribution path F is formed for each delivery valve 6 through the distribution shaft sleeve 4 and the hydraulic base 1. The fuel pumped from the plunger chamber D through the fuel pumping passage E is supplied to the distribution grooves 5a
The fuel is distributed and supplied to each of the delivery valves 6 from each of the fuel distribution paths F via the line b.

The surplus fuel from the fuel intake passage B is
It is introduced into the fuel pool C. When the closing valve V1 is closed,
The fuel suction from the fuel suction passage B stops, and the plunger chamber D
The introduction of fuel into the interior is stopped. As described above, the closing valve V is provided by the low-cost electromagnetic solenoid 8 without providing a mechanism for forcibly operating the governor as a fuel injection stopping means in the distribution type fuel injection pump having the mechanical governor.
1 and the fuel injection can be stopped by stopping the supply of the fuel to the plunger chamber D by the closing operation of the closing valve V1.

As described above, based on the injection stop structure including the closing valve V1 as the fuel injection stop means, the structure shown in FIGS. 6 to 11 can be considered to further improve its function. The structures shown in FIGS. 6 to 11 have in common the oil passage structure shown in FIG. First of all, FIG.
And the structure shown in FIG. 7 will be described.

In the structure shown in FIGS. 6 and 7, the plunger barrel 2 has the plunger barrel port 2a.
Is used as a fuel suction port, a new single spill port 2b is formed, and a part of the outer end opening is communicated with the fuel reservoir C. That is, when the plunger 3 is rotated by governor speed control, the lead hole 3a communicates with the spill port 2b instead of the plunger barrel port 2a. It is possible to avoid a situation in which the spill fuel is introduced into the fuel suction passage B and directly hits the valve seat 7 and the closing valve V1 to damage or corrode them.

The opening of the spill port 2b into the fuel reservoir C so that the fuel discharged from the spill port 2b does not flow into the fuel intake passage B or the reverse intake passage G via the fuel reservoir C. Is 90 ° from any opening of the fuel suction path B and the reverse suction path G in the fuel reservoir C.
As described above, they are arranged apart from each other in phase. In the case of the present embodiment, as shown in FIG. 7, the spill port 2b is provided directly opposite to the plunger barrel port 2a as the fuel suction port facing the fuel suction passage B, that is, 180 ° out of phase. Between the openings of both ports 2a and 2b,
The reverse suction passage G is opened in the fuel reservoir C at a phase difference of 90 ° from the opening of the spill port 2a.

Further, in FIGS. 8 and 9, the fuel outlet port 1a communicating with the fuel supply path A is not provided, and the fuel outlet from the fuel supply path A is unified with the fuel intake path B. . On the other hand, a fuel discharge passage H that opens the fuel outlet port 1b is formed in the hydraulic base 1, and a fuel reservoir C is formed.
Is communicated to. In this way, the fuel from the fuel charge pump 13 is always introduced into the fuel reservoir C from the fuel supply path A, so that the efficiency of filling the plunger chamber D with fuel is improved and the injection is stabilized. Further, since the fuel flow is smooth, the stagnation of bubbles which tends to occur in the fuel supply path A can be suppressed.
The injection characteristics are to be improved.

Excess fuel is discharged from the fuel discharge passage H to the fuel tank via the fuel outlet port 1b. In addition, a check valve V2 is provided in the fuel discharge passage H so that fuel does not flow backward from the fuel discharge passage H to the fuel reservoir C.

The fuel discharge passage H is directly opposed to the spill port 2b so that most of the spill fuel discharged from the spill port 2b is directly introduced into the fuel discharge passage H and discharged therefrom. Reverse suction path G via C
And the inflow into the fuel suction passage B can be avoided more reliably.

Further, in the embodiment shown in FIGS. 10 and 11, the check valve V2 'in which the accumulator function is added to the check valve provided in the fuel discharge passage H is used as the check valve V2'.
The pressure on the upstream side is made constant, so that the pressure in the fuel reservoir C is stabilized, and the amount of fuel introduced into the plunger chamber D and the amount of fuel returned from the reverse suction passage G are stabilized. This leads to stable injection.

[0026]

According to the present invention, in a two-shaft distribution type fuel injection pump, the following effects are obtained because it is configured as described above. First, with the configuration as described in claim 1, when the injection is stopped, the suction of fuel from the fuel supply path to the plunger chamber can be reliably stopped by a low-cost closing valve. That is, it is not necessary to provide an expensive electronic governor, and by providing a closing valve that can be driven by an electromagnetic solenoid or the like in a type using a mechanical governor, it is possible to forcibly stop fuel injection at low cost.

Further, in the configuration according to the first aspect,
The reverse suction passage from the distribution shaft to the fuel suction side can be connected to the fuel reservoir to prevent the closing valve from operating and prevent fuel from flowing from the fuel suction passage to the reverse suction passage. The effect of improving the filling efficiency of the shaft and avoiding backflow from the distribution shaft to the plunger chamber can be expected.

Further, as in the second aspect of the present invention, one port of the plunger barrel is dedicated to the spill port, and this arrangement (opening to the fuel reservoir) is at least 90 ° from both the fuel suction path and the reverse suction path. By separating the phases, the high-temperature exhaust fuel from the spill port does not flow into the fuel intake path or the reverse intake path, and the spill fuel directly hits and causes malfunction of the closing valve in the fuel intake path or breakage of the valve seat. In addition, the backflow in the reverse suction passage is avoided, and the effect of improving the charging efficiency from the plunger chamber to the distribution shaft and avoiding the backflow from the distribution shaft to the plunger chamber can be further expected.

Further, the fuel discharge passage is formed as described in claim 3, and the outlet in the fuel supply passage is unified with the fuel suction passage, so that the fuel pool is formed in the fuel passage from the fuel supply passage to the fuel discharge passage. As a result, the efficiency of filling the fuel reservoir with fuel increases, which leads to an improvement in the efficiency of pumping from the plunger. Further, by providing a check valve in the fuel discharge path, surplus fuel can be smoothly discharged to the fuel discharge path,
The efficiency of filling the fuel reservoir with the fuel from the fuel supply path is further enhanced.

Further, in the configuration according to the third aspect, the effect of the third aspect is obtained by directly facing the fuel discharge path and the spill port as described in the fourth aspect, and the spill fuel from the spill port is reduced. The spill fuel is reliably discharged to the fuel discharge path, and the spill fuel is prevented from flowing into the fuel suction path or the reverse suction path through the fuel pool. The effect of avoiding breakage of the seat and the like, and further preventing the efficiency of filling from the plunger chamber to the distribution shaft by the backflow in the reverse suction passage and avoiding the backflow from the distribution shaft to the plunger chamber can be further expected.

In addition, by adding an accumulator function to the check valve of the fuel discharge path, the pressure on the upstream side of the check valve is made constant, so that a constant pressure effect of the fuel pool can be obtained. This leads to the stability of the fuel pumping from the plunger chamber to the distribution shaft and the stability of the fuel flow to the fuel reservoir through the reverse suction passage, so that stable fuel injection can be obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a two-shaft distribution type fuel injection pump.

FIG. 2 is a side sectional view of the same, showing a structure provided with an electromagnetic solenoid 8 for driving a closing valve V1.

FIG. 3 is a front cross-sectional view of a part of a two-shaft distribution type fuel injection pump in which a plunger 3 feeds pressure to a distribution shaft 5;

FIG. 4 is a sectional view taken along line XX in FIG. 3 of a structure in which a single plunger barrel port 2a is provided with a closing valve V1 provided on a path from a fuel supply path A to a fuel suction path B.

FIG. 5 is a sectional view taken along line YY in FIG. 4;

6 is a sectional view taken along line XX in FIG. 3 of a structure in which a closing valve V1 is provided on a path from a fuel supply path A to a fuel suction path B, and a plunger barrel port 2a and a spill port 2b are provided in the plunger barrel 2. FIG.

FIG. 7 is a sectional view taken along the line Y─Y in FIG. 6;

8 is a cross-sectional view taken along line XX in FIG. 3 of a structure in which a fuel discharge path H with a check valve V2 is provided in addition to the structure of FIG.

FIG. 9 is a sectional view taken along line YY in FIG. 8;

FIG. 10 is a cross-sectional view taken along line X- in FIG. 3 in a structure in which the check valve of the fuel discharge passage H is a check valve V2 with an accumulator function added.
It is an X-ray sectional view.

11 is a sectional view taken along line YY in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic base 1a Fuel outlet port 1b Fuel outlet port 2 Plunger barrel 2a Plunger barrel port 2b Spill port 3 Plunger 3a Lead 4 Distribution shaft sleeve 5 Distribution shaft 6 Delivery valve 6a Delivery holder 7 Valve seat 8 Electromagnetic solenoid 9 Pump drive housing 9a Fuel inlet port 10 Camshaft 17 Hydraulic base A Fuel supply path B Fuel suction path C Fuel pool D Plunger chamber E Fuel pressure feeding path F Fuel distribution path G Reverse suction path H Fuel discharge path V1 Shutoff valve V2 Check valve V2 ' Check valve with accumulator

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masamichi Tanaka 1-32 Chayacho, Kita-ku, Osaka City, Osaka Inside Yanmar Diesel Co., Ltd.

Claims (5)

[Claims] 1. A hydraulic base comprising a plunger barrel in which a plunger is internally fitted, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel delivered from the plunger to each delivery valve. A distribution type fuel injection pump, wherein an annular groove is recessed in an outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with a hydraulic base, and fuel from a fuel charge pump is introduced at the hydraulic base. A fuel supply passage, a single fuel suction passage branching therefrom, and a reverse suction passage from the distribution shaft, which are formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. A distributing type fuel injection system wherein a port is communicated with the fuel reservoir, wherein a portion between the fuel supply passage and the fuel intake passage can be opened and closed by a closing valve. Pump injection stop structure. 2. A hydraulic base in which a plunger barrel in which a plunger is fitted, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for delivering and delivering fuel pressure-fed from the plunger to each delivery valve. A distribution type fuel injection pump, wherein an annular groove is recessed in an outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with a hydraulic base, and fuel from a fuel charge pump is introduced at the hydraulic base. A fuel supply passage, a single fuel suction passage branching therefrom, and a reverse suction passage from the distribution shaft, which are formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. A port communicating with the fuel reservoir, wherein a portion between the fuel supply passage and the fuel suction passage can be opened and closed by a closing valve, and the port of the plunger barrel is opened. One port is a spill port, and in the fuel reservoir, the opening of the spill port is separated from the opening of the fuel suction path and the reverse suction path by 90 ° or more in phase. Injection stop structure for fuel injection pump. 3. A hydraulic base in which a plunger barrel for fitting a plunger, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel delivered from the plunger to each delivery valve are fitted. A distribution type fuel injection pump, wherein an annular groove is recessed in an outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with a hydraulic base, and fuel from a fuel charge pump is introduced at the hydraulic base. A fuel supply passage, a single fuel suction passage connected thereto, and a reverse suction passage from the distribution shaft, and a port formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. Is connected to the fuel reservoir, the outlet of the fuel in the fuel supply path is unified to the fuel intake path, and the space between the fuel supply path and the fuel intake path is , Which can be opened and closed by a closing valve, and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base is formed in the hydraulic base to communicate with the fuel reservoir, and a check valve is provided in the fuel discharge path. An injection stop structure for a distribution-type fuel injection pump, wherein the injection stop structure is provided. 4. A hydraulic base in which a plunger barrel in which a plunger is fitted, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying the fuel pressure-fed from the plunger to each delivery valve. A distribution type fuel injection pump, wherein an annular groove is recessed in an outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with a hydraulic base, and fuel from a fuel charge pump is introduced at the hydraulic base. A fuel supply passage, a single fuel suction passage connected thereto, and a reverse suction passage from the distribution shaft, and a port formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. Is connected to the fuel reservoir, the outlet of the fuel in the fuel supply path is unified to the fuel intake path, and the space between the fuel supply path and the fuel intake path is , Which can be opened and closed by a closing valve, and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base is formed in the hydraulic base to communicate with the fuel reservoir, and a check valve is provided in the fuel discharge path. Wherein one of the ports of the plunger barrel is a spill port and faces the fuel discharge path. 5. A hydraulic base in which a plunger barrel in which a plunger is fitted, a delivery valve for the number of cylinders of the internal combustion engine, and a distribution shaft for distributing and supplying fuel pumped from the plunger to each delivery valve. A distribution type fuel injection pump, wherein an annular groove is recessed in an outer peripheral surface of the plunger barrel to form a fuel reservoir in a gap with a hydraulic base, and fuel from a fuel charge pump is introduced at the hydraulic base. A fuel supply passage, a single fuel suction passage connected thereto, and a reverse suction passage from the distribution shaft, and a port formed by the fuel suction passage, the reverse suction passage, and the plunger barrel. Is connected to the fuel reservoir, the outlet of the fuel in the fuel supply path is unified to the fuel intake path, and the space between the fuel supply path and the fuel intake path is , Which can be opened and closed by a closing valve, and a fuel discharge path for discharging surplus fuel from the inside of the hydraulic base is formed in the hydraulic base to communicate with the fuel reservoir, and a check valve is provided in the fuel discharge path. And an accumulator function is added to the check valve to stop injection of the distribution type fuel injection pump.