CN100485183C - Fuel supply pump and tappet structure body - Google Patents

Fuel supply pump and tappet structure body Download PDF

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Publication number
CN100485183C
CN100485183C CNB2003801004353A CN200380100435A CN100485183C CN 100485183 C CN100485183 C CN 100485183C CN B2003801004353 A CNB2003801004353 A CN B2003801004353A CN 200380100435 A CN200380100435 A CN 200380100435A CN 100485183 C CN100485183 C CN 100485183C
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China
Prior art keywords
fuel
hole
plunger
mentioned
spring
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CN1703578A (en
Inventor
青木伸夫
久保田一哉
寺田武史
小林范之
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Bosch Corp
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Bosch Automotive Systems Corp
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Abstract

A fuel supply pump with a large fuel discharge amount and a tappet structure body that are suitably used for a accumulated pressure-type fuel injection device that mechanically intensifies pressure. In a tappet structure body with a pass-through hole and a fuel supply pump with a spring seat, a penetration portion through which a lubricant or a fuel for lubrication passes is provided by cooperation of the tappet structure body and the spring seat. The penetration portion is provided between a spring-holding chamber for holding a spring used when a plunger is pulled down and a cam chamber for receiving a cam for lifting/lowering the plunger.

Description

Fuel feed pump and tappet structure body
Invention field
The invention relates to fuel feed pump and tappet structure body.Particularly about, for example be applicable to and utilize pressurization the fuel of big flow to be carried out fuel feed pump used in the accumulator fuel injection device of mechanical type supercharging and tappet structure body with piston.
Background technique
All the time, in order to make inject high pressure fuel efficiently such as diesel, various motions about the accumulator fuel injection device (CRS:Common RailSystem) that uses accumulator (coaxial thick stick) are arranged.
For example, in 6-No. 93936 communiques of Te Kaiping, the motion of accumulator fuel injection device is as shown in figure 25 arranged, this device is in order easily to switch the pressure of accumulator according to the operating condition of internal-combustion engine, first accumulator 236 of bearing main injection and second accumulator 278 of bearing Guide spray have been equipped, and implement fuel by COMM communication 286 these two accumulators 236,278 of switching and spray.
In addition, in No. 2885076 communique of patent also relevant for the motion of accumulator fuel injection device, this device is provided with the charged piston and the cylinder chamber that are used for fuel pressure boost in order to obtain the jet pressure of suitable engine performance between accumulator and Fuelinjection nozzle.
More specifically, disclosed is as shown in figure 26 accumulator fuel injection device 380, this device has switchable pump 362 that contains accumulator 395, fuel supply oil circuit 360, control oil channel 361, control fuel injection usefulness and the cylinder chamber 383 that is used to accommodate pressure charging valve 378, and is used for fuel pressure is increased to 70~120MPa (switching valve (supercharging device three-way solenoid valve) 364 that about 700~1200kgf/cm2) charged piston 378, oil hydraulic circuit 363, driven plunger are used and regulator (figure slightly).
Yet the spy opens that disclosed accumulator fuel injection device is because of 2 kinds of accumulators of needs equipment and COMM communication thereof etc. in flat 6-No. 93936 communiques, and therefore, there is large-scale, complicated problems in this accumulator fuel injection device.In addition, in this accumulator fuel injection device, during with the cam of high-speed driving fuel feed pump and plunger, because lubricant oil can not freely be travelled to and fro between between spring holding chamber and the cam chamber, so find to exist this lubricant oil to hinder the action of plunger, the problem that can not fully pressurize to the fuel of big flow.
And in No. 2885076 communique of patent, in the disclosed accumulator fuel injection device, between accumulator and fuel-injection pump, be provided with charged piston, in the time of desire realization multistage pressure injection, accumulator is supplied with the compression pump of fuel under high pressure.But this compression pump is a compression pump all the time, and not relating in to supply with a large amount of fuel under high pressure to charged piston is the compression pump of purpose.
At this, study with keen determination through the present inventor, find, can make lubricant oil or the lubricated turnover freedom that becomes with fuel by between spring holding chamber and cam chamber, interconnecting part being set, even high-speed driving cam and plunger also can carry out pressure treatment to a large amount of fuel oil fully.
That is to say, even the purpose of this invention is to provide the cam and the plunger that are applicable to the high-speed driving fuel feed pump, the discharge-amount of fuel is heightened, do not allow lubricant oil or lubricated hinder the action of plunger, the tappet structure body that can carry out the fuel feed pump of abundant pressure treatment and be applicable to this pump fuel with fuel yet.
Summary of the invention
[1] according to the present invention, in the fuel feed pump that has tappet structure body and spring thin plate, when leaving behind plunger, be used for keeping the spring holding chamber of spring and accommodate between the cam chamber of the cam that is used for making the plunger lifting, setting is used for making lubricant oil or the lubricated interconnecting part that passes through with fuel, can address the above problem a little.
That is to say, when plunger rises with pressure treatment fuel, be present in the spring holding chamber lubricant oil or lubricated can be rapidly by interconnecting part and move to cam chamber smoothly with fuel.And descend when sucking fuel at plunger, be present in the cam chamber lubricant oil or lubricated can be rapidly by interconnecting part and move to the spring holding chamber smoothly with fuel.Therefore, even when high-speed driving cam and plunger, for example by making the cam high speed rotating to 1500rpm so that during the plunger high-speed driving, because lubricant oil or lubricated can freely travel to and fro between between spring holding chamber and the cam chamber with fuel, so this lubricant oil or the action of lubricating with fuel obstruction plunger also can tail off, and can carry out abundant pressure treatment to a large amount of fuel.
[2] in addition, when constituting fuel feed pump of the present invention, the spring thin plate have be used for keeping the spring holding part of spring when leaving behind plunger and be used for braking the plunger assembly department that this plunger uses in, be preferably in the plunger assembly department around be provided as the part of interconnecting part, be used for making lubricant oil or lubricatedly pass through the hole with what fuel passed through.
By such formation, even the high-speed driving plunger also can make lubricant oil or lubricated with fuel discrepancy more smoothly between spring side and cam side by the hole by the spring thin plate.
[3] in addition, when constituting fuel of the present invention and use pump, be preferably in and be provided with a plurality ofly the time on the spring thin plate, be radial or half radial configuration by the hole on every side at the plunger assembly department this by the hole.
By such formation, no matter the installation phase place of spring thin plate how, all can form interconnecting part easily and definitely between this spring thin plate and tappet structure body.
[4] in addition, when constituting fuel of the present invention and use pump, tappet structure body is preferably in the part that is provided as interconnecting part on the roller body when containing roller and roller body, is used for making lubricant oil or lubricates with what fuel passed through and pass through the hole.
By such formation, even the high-speed driving plunger also can make lubricant oil or lubricated with fuel discrepancy more smoothly between spring side and cam side by the hole of passing through on the roller body.
[5] in addition, when constituting fuel of the present invention and use pump, be preferably in and be provided with a plurality ofly the time on the roller body, this is disposed on the peripheral direction of roller body by the hole by the hole.
By such formation, no matter the phase place of tappet structure body how, all can form interconnecting part easily and definitely between this spring thin plate and tappet structure body.
[6] in addition, when formation fuel of the present invention is used pump, on roller body, be provided as the part of interconnecting part, be used for making lubricant oil or lubricated with fuel pass through pass through the hole time, preferably on roller body, contain this being provided with of opening portion everywhere and be used for making lubricant oil or the lubricated guiding path that passes through with fuel by the below in hole.
By such formation, no matter the phase place of tappet structure body how, all can form interconnecting part by roller body easily and definitely.
[7] in addition, when constituting fuel feed pump of the present invention, be preferably in the part that is provided as interconnecting part on the roller body, be used to make lubricant oil or lubricated with fuel pass through pass through the hole time, this by the hole downside contain opening portion be provided for making lubricant oil or the lubricated guiding path that passes through with fuel everywhere.
By such formation, no matter the installation phase place of tappet structure body how, all can form interconnecting part by roller body easily and definitely.
[8] in addition, when constituting fuel of the present invention and use pump, be preferably in when adopting with the fuel of a part, also can make to lubricate at interconnecting part and pass through with fuel as lubricated fuel lubricated program with fuel.
By such formation,,, also can not reduce the purification efficiency of exhaust because of being same composition even the fuel of a large amount of pressure treatment mixes with the lubricant oil fuel meat of using as lubricated composition.
[9] in addition, when constituting fuel of the present invention and use pump, preferably be used in the unit time flow is forced into the accumulator fuel injection device that the value more than the 50MPa is used at 500~1500 liters/hour fuel.
By using on such accumulator fuel injection device,,, just can improve the combustion efficiency of fuel injection system so can easily implement the fuel injection of multistage pressure because of can be easily the fuel of big flow being carried out pressure treatment.
[10] in addition, other attitude of the present invention is, in the tappet structure body that contains roller and roller body, making lubricant oil or the lubricated hole of passing through with fuel of passing through be arranged to that face is through to non-column rolling part from this roller body being used on the roller body, for example, be through to the tappet structure body that side face is a feature.
That is to say, when plunger rises with pressure treatment fuel, by or not the hole, with the lubricant oil in the spring holding chamber or lubricate and move to cam chamber rapidly and smoothly with fuel by what roller cut out.And descend when sucking fuel at plunger, by being located at the hole of pass through on the roller, with the lubricant oil in the cam chamber or lubricate and move to the spring holding chamber rapidly and smoothly with fuel.
Therefore, such tappet structure body has been arranged, by being used on the fuel feed pump, even with cam and plunger high-speed driving, for example, even by making the cam high speed rotating to 1500rpm so that during the plunger high-speed driving, lubricant oil or the lubricated action that hinders plunger with fuel also can tail off, its result, also can reduce and camshaft between burn.
Description of drawings
Fig. 1 is the profile of the part excision of fuel feed pump of the present invention.
Fig. 2 is the sectional drawing of fuel feed pump of the present invention.
(a) of Fig. 3 with (b) be the oblique drawing and the sectional drawing of shell separately.
(a) of Fig. 4 with (b) be the oblique drawing and the profile of plunger separately.
Fig. 5 is that the fuel suction spues with the explanatory drawing of valve with valve and fuel.
Fig. 6 is the oblique drawing of spring thin plate.
(a) of Fig. 7 with (b) be the planimetric map and the sectional drawing of spring thin plate separately.
(a)~(c) of Fig. 8 is the explanatory drawing of the mounting construction of plunger separately.
(a) of Fig. 9 and the explanatory drawing that (b) is fuel suction usefulness valve.
Figure 10 is that fuel sucks the sectional drawing with valve.
Figure 11 be explanation engine driven supercharging mode accumulator fuel injection device program for figure.
Figure 12 is the figure that supplies of explanation proportional control valve constitution.
Figure 13 be explanation engine driven supercharging mode accumulator fuel injection device structure for figure.
Figure 14 be the conceptive accumulator fuel injection device that shows the engine driven supercharging mode fuel pressure boost method for figure.
Figure 15 is the explanatory drawing of the discharge time table of fuel under high pressure.
(a)~(c) of Figure 16 is the explanatory drawing (one) of tappet structure body.
Figure 17 is the explanatory drawing (its two) of other tappet structure body.
Figure 18 is the explanatory drawing (its three) of other tappet structure body.
Figure 19 is the explanatory drawing (its four) of other tappet structure body.
Figure 20 is the explanatory drawing (its five) of other tappet structure body.
Figure 21 is the oblique drawing of explanation roller body.
It (b) is the figure that supplies that roller body is described separately that Figure 22 (a) reaches
Figure 23 is the confession figure (one) that other roller body is described.
Figure 24 is the confession figure (its two) that other roller body is described.
Figure 25 is the explanatory drawing of the structure of former accumulator fuel injection device.
Figure 26 is the explanatory drawing of structure of other former accumulator fuel injection device.
Embodiment
[first example]
First example as shown in Figures 1 and 2, in the fuel feed pump that has specific spring thin plate 10 and tappet structure body 6, spring thin plate 10 is used for keeping the spring holding part 12 of spring 68 and is used for installing in the plunger assembly department 14 of front end 55 usefulness of this plunger 54 when having the plunger 54 of the fuel feed pump 50 of leaving behind, around plunger assembly department 14, be provided with by hole 16, and, tappet structure body 6 is when containing roller 29 and roller body 28, on this roller body 28, be provided with, move with the association of spring thin plate 10 by tappet structure body 6 and form the fuel feed pump 50 that makes lubricant oil or lubricate the interconnecting part that passes through with fuel by hole 30b.
Below, by the constitutive requirements branch, specifically describe this fuel feed pump 50.
1. the grown form of fuel feed pump
The grown form of fuel feed pump there is no special restriction, for example preferably has fuel feed pump 50 as shown in Figures 1 and 2.That is to say that said fuel feed pump 50 preferably is made of pump case 52, tumbling (cylinder) 53, plunger 54, spring thin plate 10, tappet structure body 6 and cam 60.
In addition, the inboard of the tumbling 53 in being housed in pump case 52 forms by corresponding to the rotatablely moving of cam 60, plunger 54 to-and-fro motion and fuel compression chamber 74 that the fuel that imports pressurizes.
Therefore, can will be pressed into fuel under high pressure from the adding of fuel-efficient that supply pump 64 force feeds come by plunger 54 in the fuel compression chamber 74.
Yet, in the example of this fuel feed pump 50,, also tumbling (cylinder) 53 and the plunger 54 that is provided with two groups can be increased to more than two groups for example in order in pump case 52, to carry out more jumbo HIGH PRESSURE TREATMENT.
(1) pump case
Pump case 52 as shown in Figures 1 and 2, for accommodating the basket of tumbling (cylinder) 53, plunger 54, tappet structure body 6 and cam 60.
Therefore, as Fig. 3 (a) and (b), said pump case 52 preferably will have the axis hole 92a of left and right sides opening and the cylindrical space 92b and the 92c of upper and lower opening.
In addition, shown in Fig. 3 (b), on the side surface direction of cylindrical space 92b, 92c, preferably also to establish opening through hole 97,98 in the said pump case 52.That is to say, said through hole 97,98, for example, large, medium and small 3 the 97a~97c of hole portion that have nothing in common with each other by bore, 98a~98c section shape hole constitutes, and the front end of guiding bolt is pressed into the 97a of hole portion, 98a, the structure that formation can guarantee to guide the position of bolt accurately to determine.In addition, for the front end that makes the guiding bolt is pressed in the 97c of hole portion, the 98c, the 97b of hole portion, 98b will guide the front end of bolt to guide to the function of the 97c of hole portion, 98c in addition.Also have, be preferably in the 97a of hole portion, the 98a, with the guiding bolt make spiral shell and bolt part, by spiral shell with will guide the front end of bolt to be pressed into.
(2) plunger tumbling
Plunger tumbling 53 as shown in Figures 1 and 2, for being used for the basket of supporting plug 54, for constituting a part of key element of the fuel compression chamber of a large amount of fuel high pressure pressure treatment being used by this plunger 54 (pump chamber) 74.Therefore, plunger tumbling 53 preferably will be installed in the opening portion of top of cylindrical space 92b, the 92c of pump case 52.
Yet under the situation of serial type or decentralized, the kind that the fuel feed pump of plunger tumbling is set can be according to the form of the change plunger tumbling that model is suitable separately.
(3) plunger
Plunger 54 carries out the key element of fuel high pressure pressurization as shown in Figures 1 and 2 for the fuel compression chamber 74 in the plunger tumbling 53.Therefore, plunger 54 is preferably wanted can lifting freely to be arranged in the plunger tumbling 53 in cylindrical space 92b, the 92c that is installed on pump case 52.
In addition, this plunger 54 preferably will be useful on the pressurization part 54a of turnover fuel compression chamber 74 usefulness as Fig. 4 and shown in Figure 5.This pressurization part 54a will be designed to littler than the bore of plunger tumbling 53, during the summit, preferably will form the space at this pressurization part 54a and 79 of discharge valves on moving to.Its reason is, even behind a large amount of fuel of high-speed driving plunger 54 pressure treatment, pressurization part 54a also can not stop up the inlet of discharge valve 79, thereby can be with the coaxial thick stick of delivering to of the more suitable cunning of fuel.
In addition,, its global design is being become the columniform while, be preferably in the end opposite and be provided with lip 55 with pressurization part 54a in order to make plunger 54 high-speed driving smoothly in plunger tumbling 53.That is to say that best one is established the lip 55 of braking usefulness on the periphery of the terminal part of columniform plunger 54 (underpart).Its reason is by adopting such formation, can fix easily and definitely with respect to the opening portion 15 that is located on the plunger assembly department 14.
In addition, said plunger 54 can rise corresponding to the rotation of cam 60 again in the trend of cam side in maintenance under the effect of plunger return spring 68 preferably as shown in Figure 2, and formation can be to the structure of the pressurization of the fuel in the fuel compression chamber 74.
Yet in the fuel feed pump of the 1st example, preferably high-speed driving plunger and cam carry out the pressure treatment of a large amount of fuel.Concrete, preferably the turnover number of plunger and cam to be fixed on the value in 1500~4000rpm scope.In addition, consider velocity ratio, preferably the turnover number of plunger and cam is located at the value in 1~5 times of scope of turnover number of internal-combustion engine.
(4) fuel compression chamber
Fuel compression chamber 74 is as Fig. 2 and shown in Figure 5, in plunger tumbling 53, with the cabin of plunger 54 shapings.Therefore, in said fuel compression chamber 74, by high-speed driving plunger 54, the fuel that pressurization that can be efficient and a large amount of quantitatively flows into by fuel supply valve 73.Yet,, and the hole of passing through separately is communicated with even, be preferably on spring thin plate described later and the roller body and will be provided with by the hole separately for drive plunger 54 does not so at a high speed make the fuel of lubricant oil or lubricated usefulness hinder the high speed motion of plunger 54 yet.
And after being finished by plunger 54 pressurization, pressurized fuel is supplied to coaxial thick stick 106 shown in Figure 11 by fuel discharge valve 79.
(5) spring thin plate
Spring thin plate 10 is shown in Fig. 6 and Fig. 7 (a)~(b), spring thin plate 10 has the spring holding part 12 that remains on the spring of using when fuel feed pump fallen and brakes the plunger assembly department 14 that this plunger is used, be preferably in plunger assembly department 14 around be provided with and make lubricant oil or lubricatedly pass through hole 16 with what fuel passed through.
(5)-1 spring holding part
The form of spring holding part 12 as long as can be configured in spring used when the plunger of fuel feed pump fallen easily, there is no special restriction, for example, as Fig. 6 or shown in Figure 7, discoideus also can, or the outstanding planar body of a peripheral direction part also can.
In addition,, be preferably on the part of spring holding part groove or hook are set, constitute and bury underground or the structure of the part of brake spring though there is not diagram.
In addition, about the configuration of spring holding part 12, shown in Fig. 6 and Fig. 7 (a)~(b), preferably be located at plunger assembly department 14 around.
Its reason is, for the surface 13 of said spring holding part 12, just connects with it by being used in the coiled type spring of using when plunger is fallen (figure slightly), not only can fix this spring easily, also can make spring be arranged on correct position.
(5)-2 plunger assembly department
Form about the plunger assembly department there is no special restriction, as long as spool and can fall plunger easily, for example, shown in Fig. 7 (a), preferably make the terminal part of plunger can be from the laterally combination of the less center hole 15a of level and smooth bigger insertion mouth 15b that inserts and spool terminal part.That is to say, preferably the width of the insertion mouth 15b of opening portion 15 will be done to such an extent that the diameter of center hole 15a of ratio open portion 15 is big.
Its reason is, by adopting such formation, do not need to use other special holding appliances again, it stopped spring thin plate and plunger.Therefore, in fuel feed pump, even when the high-speed driving plunger, the positional deviation between tappet structure body and plunger also can reduce.In addition, by adopting such formation, shown in Fig. 8 (a)~(c), in the center hole 15a of opening portion 15, the lip that is located at plunger 54 ends can stop at the inner face of plunger assembly department 14 by behind the insertion mouth 15b of opening portion 15, can not exceed.
In addition, about the form of plunger assembly department, the also variation shown in Fig. 8 (a)~(c).
At this, Fig. 8 (a) is the example of the dish shape plunger assembly department 14 that constitutes at the field, inside of spring holding part 12 internal shaping fuel stays 16b.After adopting such formation, as described later, can between the side of spring holding part 12 and plunger assembly department 14, height difference 17 be set easily.Therefore, even the position of passing through hole 30b of passing through hole 16 and roller body 28 of spring thin plate 10 slightly is offset, the fuel stays owing to be shaped betwixt, even high-speed driving plunger, lubricant oil or lubricated also can free in and out with fuel, in the obstruction of minimizing, can also make and give play to specific lubrication effect everywhere effectively the high-speed driving of plunger.
In addition, Fig. 8 (b) is provided with the example that can make plunger easy-on plunger assembly department 14 though be not at the field, inside of spring holding part 12 internal shaping fuel stays 16b.After adopting such formation,, just can make the operation of spring thin plate or processing operation become easy owing to can make the attenuation of spring gauge of sheet.
Also have, Fig. 8 (c) is for just extending the example of upper plug assembly department 14 in the field, inside of spring holding part 12.After adopting such formation, can make spring holding part 12 and plunger assembly department 14 be substantial planar, and make the operation of spring thin plate or processing operation become easy.
Yet, in (b) of Fig. 8 and example (c), by the position alignment of passing through hole 30b of passing through hole 16 and roller body 28 with spring thin plate 10, make its connection, even when the high-speed driving plunger, lubricant oil or lubricated also can free in and out with fuel can also make and give play to specific lubrication effect everywhere effectively in the obstruction that reduces the high-speed driving of plunger.
In addition, about the configuration of plunger assembly department 14, shown in Fig. 6 and Fig. 7 (a) and (b), be preferably on the field, inside of spring holding part 12 plunger assembly department 14 is set.
Its reason is, by adopting such formation, and in spring holding part 12, for example, and when can keep columnar spring, in the field, inside of this spring, but spool, high-speed driving when centering easily.
In addition, as shown in Figure 7, preferably want the height of pilot plunger assembly department 14, between the side of spring holding part 12 and plunger assembly department 14, establish height difference 17.And in Fig. 7 (b), represent height difference 17 height with mark t1.
Its reason is, such height difference has been arranged after, when can correctly spring position be set, also can easily contain the terminal part of the plunger of fuel feed pump.
Yet said height difference (t1) is preferably in the above value of 1mm specifically.
(5)-3 pass through the hole
Though the shape of passing through hole 16 and the number that are arranged on around the plunger assembly department 14 do not have particular restriction, for example, be preferably circle pass through the hole and in 1~20 scope.
Its reason is, even said number by the hole is 1, by considering its size and configuration, also can form interconnecting part, makes the lubricant oil that is present in the spring holding chamber or lubricatedly passes through cam chamber with fuel-efficient ground.And the said number in hole of passing through then is difficult to be configured on the spring thin plate if surpass 20 sometimes, or difficult with the supporting generation of spring thin plate.
Therefore, will being located at by the number in hole in 2~15 the scope, being the best in 3~10 scopes to better.
Yet,, be good preferably to be substantial circle by the shape in hole.But other ellipse, square, random shape or ditch shape also can in this way.
In addition, shown in Fig. 6 and Fig. 7 (a), preferably will around plunger assembly department 14, become radial or half radial configuration by hole 16.In the example of Fig. 6 and Fig. 7 (a), 5 are half radial configuration by hole 16 with respect to the center point P of plunger assembly department 14.
Its reason is, by evenly being configured in the hole of passing through on the spring thin plate, can making lubricant oil or lubricatedly promptly passes through with fuel.In addition, such configuration of passing through the hole also is shaped easily.Also have, by the hole, the position limit to the plunger assembly department is tailed off by such configuration.
But, shown in Fig. 7 (a), when in the plunger assembly department, being provided with the end that makes plunger, a plurality ofly preferably to avoiding opening portion 15 by hole 16 and be half radial configuration from the horizontal level and smooth opening portion 15 that inserts usefulness.
In addition, as Fig. 6 and Fig. 7 (a) illustrated by hole 16 being substantive when circular, preferably make the value of its diameter in the scope of 0.5~12mm.
Its reason is, if said diameter by the hole is less than 0.5mm, make sometimes lubricant oil or lubricated with fuel rapidly by the difficulty that becomes.Therefore, and use the accumulator fuel injection device (charged piston) of the plunger booster device that is connected on the said fuel feed pump, for example, be difficult to reach the above condition of high voltage of 50MPa sometimes.
Said diameter by the hole is if then reduce the mechanical strength of spring thin plate sometimes greater than 12mm, or reduces durability.
Therefore, said diameter by the hole with in the scope of 1~10mm for better, being the best in 1.5~6mm scope.
Yet, be designed to have nothing in common with each other a plurality of diameters good by the hole.Its reason is, has larger-diameterly by the hole and the hole of pass through than minor diameter by mixing, can make lubricant oil or lubricates and pass through rapidly with fuel by the bigger hole of passing through.And by the less hole of passing through is set, can the utmost point fine regulate lubricant oil or lubricated the time with the throughput of fuel or by speed, and so in this way less hole of passing through, the restriction of its shaping and configuration is also less.
Therefore, as an example, preferably mix having diameter and pass through hole and the diameter less hole of passing through below 2.5mm bigger more than the 2.5mm.
And, preferably the pass through hole of diameter more than 2.5mm is located at the plunger assembly department, less the pass through hole of diameter below 2.5mm is located at the spring holding part.
(6) tappet structure body
As long as tappet structure body can be coordinated to form interconnecting part with the spring thin plate, there is no special restriction, for example, the same thing of the 2nd example available and described later.Therefore, in this description will be omitted.
(7) cam
As shown in Figures 1 and 2, cam 60 is to convert rotatablely moving of motor to key element that plunger 54 moves up and down by tappet structure body 6.Therefore, cam 60 preferably will can be inserted on the axis hole 92a it by bearing with rotating freely, and constitutes the structure that the driving by diesel (camshaft 3) is rotated.
In the periphery of this cam 60, be positioned on the below of cylindrical space 92b, 92c of pump case 52 and the axial direction preferably with integrated and establish two cam part 3a, 3b that certain intervals is arranged.
Yet these cam part 3a, 3b preferably are mutually certain intervals in a circumferential direction and are set up in parallel.
(8) the fuel suction spues with valve and fuel and uses valve
Fuel sucks with valve and fuel and spues with preferably configuration as shown in Figure 5 of valve, and just like Fig. 9, structure shown in Figure 10.
That is to say that fuel sucks with valve 73 as shown in figure 10, preferably will have the valve body 20 of valve body 19 and the terminal lip ring 20b of portion.In addition, as shown in figure 10, in this valve body 19, the cylindric fuel suction chamber 19a of lower opening preferably to be set and the fuel inlet hole 19b of suction fuel in this fuel suction chamber 19a.
In addition, the fuel that spues preferably also will have valve body with valve 79 and is housed in the part of valve casing.And preferably make its maintenance close the trend of valve direction by spring, constitute and close the structure of valve the pressurized coaxial thick stick of fuel supply by driving valve.
In addition, as shown in Figure 9, but the fuel suction spues with valve 73 and fuel and preferably has valve body 19, is installed in the valve body 19 of the valve body 20 of the operation of its inside, the fuel suction chamber 19a, the fuel inlet hole 19b that are arranged on valve body 19 inside and a part and the thin plate part 23 that valve body 20 joins with valve 79, and, when a plurality of inlet hole 19b are set, this fuel inlet hole is the setting of non-radioactive shape with respect to fuel suction chamber 19a.
Its reason is if valve is used in the suction of said fuel, for example, even the unit time flow of fuel reaches 500~1500 liters/hour, also can carry out extremely correct and quantitative supply to fuel feed pump.
In addition, same, if spuing, said fuel uses valve, for example,, also can carry out extremely correct and quantitative supply to accumulator (coaxial thick stick) even the unit time flow of fuel reaches 500~1500 liters/hour.
(9) lubrication procedure
In addition, there is no special restriction, but preferably adopt with the fuel oil of a part fuel lubricated program as lubricated composition (lubricant oil fuel) for the lubrication procedure of fuel feed pump.
Its reason is, during with a large amount of pressure treatment fuel, even improve sealing, also still can make the fuel that is spilt by fuel pressurization chamber of a part be easy to mix with the lubricated composition that is present in the spring holding chamber sometimes at high-speed driving cam and plunger.That is to say, by adopting fuel lubricated program, even the fuel of a large amount of pressure treatment mixes with the lubricant oil fuel part as lubricated composition, because of it is same composition, the waxization that also can not reduce the degree of purification of exhaust and can prevent to lubricate composition.
2. accumulator fuel injection device
In addition, the fuel feed pump of the 1st example is preferably as the part of the accumulator fuel injection device 100 of the engine driven supercharging formula that following structure is arranged.
That is to say, as shown in figure 11, fuel feed pump 103 preferably by fuel reservoir 102, to said fuel reservoir 102 carry out fuel supply petrolift (low pressure pump) 104, fuel feed pump (high-pressure service pump) 103, constitute as the coaxial thick stick 106, plunger booster device (charged piston) 108 and the fuel injection system 110 that are used for the fuel that comes from said fuel feed pump 103 force feeds is carried out the accumulator of pressure accumulation.
(1) fuel reservoir
The volume and the form of fuel reservoir 102 as shown in figure 11 preferably for example will be considered, can circulating unit time flow are decision again behind 500~1500 liters/hour the fuel.
(2) petrolift, proportional control valve and fuel feed pump
Petrolift 104 preferably will be as shown in figure 11, can be with fuel (light oil) force feed in the fuel reservoir 102 to fuel feed pump 103, and filter 105 is set at petrolift 104 and 103 of fuel feed pumps.Also have,, as an example, the structure of drive pump will be arranged preferably, be installed in the end of cam, and the driving by transmission device comes direct with camshaft or become suitable velocity ratio to drive about petrolift 104.
In addition, by the fuel that petrolift 104 comes across filter 105 force feeds, preferably supply with pump 103 via proportional control pump (FMU) 120 fuelings that carry out the emitted dose adjustment as shown in figure 12 again.Said proportional control valve 120, for example, the electronic control unit described later (ECU) of feeling better is most controlled, and comes the position of proportional control stay column 125 by the electric current of adjusting coil 124.That is to say, by position corresponding to stay column 125, the position of piston 127 of the front end of control stay column 125 changes the fuel of the groove 122 that is arranged on the said piston 127 and 129 of fuel supplying parts by area, can control fueling and supply with fuel with the suction valve on the pump 103 (figure omits).
In addition, as shown in figure 12, the fuel of being supplied with by petrolift 104 preferably constitutes by returning the structure of fuel reservoir 102 with the relief valve (OFV) 134 that said proportional control pump becomes to be set up in parallel except given proportional control valve 120 and fuel feed pump 103 by force feed.Have, the fuel of a part then preferably uses by outfall 136 force feeds to the fuel and lubricating oil of the bearing of fuel feed pump 103 (figure slightly) as bearing that is installed on the relief valve 134 again.
Yet as mentioned above, fuel feed pump 103 is to be carried out the device of high pressure pressure treatment by the fuel that petrolift 104 is supplied with, and preferably constitutes after the fuel pressurization, by the structure of high-pressure passage 107 past coaxial thick stick 106 force feeds.
(3) high-pressure passage
In addition, as shown in figure 11, preferably will be in the outlet port of fuel feed pump 103, or on the coaxial thick stick 106 described later, one-way valve (figure slightly) is set on the fuel feed pump 103.
Its reason is by this one-way valve, can make 103 pairs of 106 on coaxial thick sticks of fuel feed pump carry out transfer the fuel.Thereby the adverse current can effectively prevent to open the Electromagnetic Control pump time, thereby prevent the decline of the pressure in the coaxial thick stick 106.
(4) coaxial thick stick
In addition, as shown in figure 11, preferably be connected to a plurality of indicators (jet pump) 110 in the coaxial thick stick 106, will coaxial thick stick 106, be become the fuel of high pressure in internal combustion office (figure slightly), to spray by pressure accumulation from each indicator 110.In addition, though these each indicators 110 do not have diagram, preferably control its discharge-amount by IDU (IDU:Injector Driving Unit).Said IDU is connected on the electric control device unit as control gear described later (ECU:Electrical Controlling Unit), is subjected to the drive of this ECU.
In addition, preferably to be connected to pressure detector 117, will deliver to ECU by the testing signal that said pressure detector 117 obtains at the side end of coaxial thick stick 106.That is to say that ECU preferably wants one to receive from the testing signal of pressure detector 117, when just controlling solenoid electric valve (figure slightly), according to the driving of detected pressure control IDU.
(5) plunger booster device
In addition, as plunger booster device (charged piston), as shown in figure 13, when preferably will contain cylinder 155, mechanical type piston 154, pressurized chamber 158, solenoid valve 170 and circulation road 157, mechanical type piston 154 will have larger area compression zone 152 and pressurization part 156 than small size is arranged.
That is to say, the extruding that is housed in mechanical type piston 154 in the cylinder 155 fuel by coaxial thick stick pressure is arranged compression zone 152 in is moved, for example, will be by there being the pressurization part 156 of small size more that the fuel pressurization of 30MPa degree pressure will be arranged, the coaxial thick stick of pressurized chamber 158 is pressed preferably will be in the value in the scope of 150MPa~300MPa.
In addition, for to mechanical type piston 154 pressurization, used the fuel that has coaxial thick stick to press in a large number, and after pressurization, preferably the relief valve 170 by electromagnetic drive type backflows to fuel reservoir etc.That is to say that the most fuel that has coaxial thick stick to press is preferably in after the pressurization of mechanical type piston, the fuel that flows out with the solenoid valve 180 from fuel injection system backflows to fuel reservoir, is used in again the mechanical type piston is pressurizeed.
Fuel by pressurization part 156 superchargings then is sent to fuel injection system (fuel injection nozzle) 163, efficiently sprays and burns.
Therefore, by such plunger booster device is set, can not will coaxial thick stick excessively maximizes, and pushes the mechanical type piston effectively by the fuel that has coaxial thick stick to press.
That is to say, shown in the illustraton of model of Figure 14,, consider the stroke amount of mechanical type piston by when on the mechanical type piston, being equipped with larger area compression zone and compression zone than small size, can reduce pressurization loss, the fuel pressure boost to there being coaxial thick stick to press effectively on expected value.More specifically, by the fuel that has the larger area compression zone to accept to come from coaxial thick stick (pressure: p1, volume: V1, merit: W1), can obtain the more fuel of high pressure (pressure: p2, volume: V2, merit: W2) by the mechanical type piston that has than the pressurization part of small size.
(6) fuel injection system
(6)-1 essential structure
In addition, the form of fuel injection system (fuel injection nozzle) 110 there is no particular restriction, for example, as shown in figure 13, preferably to have by needle-like valve body 162 seat seat surface 164, and the nozzle body 163 of spray-hole 165 formations that form in this downstream side that the pump housing contacting part of seat surface 164, when being formed in needle-like valve body 162 lifts, will import the structure of spray-hole 165 by the fuel that the upstream end of seat surface 164 is supplied with.
In addition, this fuel injection nozzle program is in towards the trend of seat surface 164 needle-like valve body 162 by spring 161 grades always, and needle-like valve body 162 is the solenoid valve type that energising/non-energising is switched by solenoid 180 preferably.
(6)-2 discharge time table
In addition, about the discharge time table of fuel under high pressure, as shown in figure 15, the fuel injection table that shows two stage spray regimes shown in solid line A preferably.
Its reason is, by the supercharging combination of coaxial thick stick and plunger booster device (charged piston), can reach the discharge time table in said two stages, when can improve fuel economy thus, and can purifying exhaust gas gas.
In addition, according to the present invention, it is good to make up the fuel injection table that obtains shown in the dotted line B of Figure 15 by the supercharging of coaxial thick stick and plunger booster device (charged piston).
Yet when not using plunger booster device (charged piston), just discharge time table in the past is the discharge time table in a stage of the low emitted dose shown in Figure 15 dotted line C.
(7) action
The effect of fuel feed pump 103, plunger booster device (charged piston) 108 and the Fuelinjection nozzle 110 of the 1st example then, is described.That is to say, as shown in figure 11, when fuel injection system (fuel injection nozzle program) operates, the fuel of fuel reservoir 102 is supplied with pump 103 from petrolift 104 fuelings, then, press 107 to send to high pressure fuel passage from the fuel under high pressure of fuel feed pump 103.
Then, as shown in figure 13, pressure accumulation preferably is forced into the above high pressure conditions of 150MPa by the plunger booster device (charged piston) 108 that is arranged on 110 of itself and Fuelinjection nozzles again to the 50MPa degree in coaxial thick stick 106.
[the 2nd example]
The 2nd example is shown in Figure 16 (a)~(c), for containing the tappet structure body 6 of roller 29, roller body 28, on the roller body 28 of this tappet structure body 6, be provided with begin from this roller body 28 tops to be through to non-column rolling part be used to make lubricant oil or lubricatedly pass through hole 30b with what fuel passed through.Below, suitably with reference to the accompanying drawings, specifically describe the essential structure of tappet structure body 6 and the roller body 28 of band insertion hole 30b.
1. essential structure
Tappet structure body 6 is to be made of shell 27, roller body 28 and roller 29 shown in Figure 16 (a)~(c) basically, and preferably the rotation that is connected in the cam 60 on this of the camshaft 3 by as shown in Figure 1 constitutes liftable structure.Yet, among Figure 17 and Figure 18 illustration the variation of tappet structure body 6 of band shell 27 and spring thin plate 10, among Figure 19 and Figure 20 illustration the variation of tappet structure body of band shell, all can use according to reality.
At this, shell 27 best above-below direction openings, and the cylindrical body of outer side surface of side that is suitable for cylindrical space 92b, the 92c of the pump case 52 among Fig. 3 by band constitutes.In addition, the top that is preferably in the barrel of said shell 27 is provided for inserting opening portion (otch) 27a of guiding bolt, forms to prolong in the perforation sky of the axial direction of shell 27.Its reason is, when tappet structure body 6 liftings, by cooperating of guiding bolt and opening portion 27a, can make this tappet structure body 6 the direction of action non-migration and along the axis lifting of cylindrical space 92b, 92c.
In addition, on the inner side surface of shell 27, preferably be provided with and be used to limit move up the 1st jut 27b of usefulness of roller body 28.In addition, be preferably in and be integrally formed with the 2nd jut 27c that the periphery that is used to induce spring 68 is used on the inner side surface of shell 27.Its reason is for the unnecessary diametric(al) that is provided for restraining spring thin plate 26 on roller body 28 moves the function of usefulness, and to make the shape of roller body 28 do simply.
And roller 29 preferably can rotate freely and is supported on that the surface is whole handles through carbon element, as executes the roller that is coated with the carbon element epithelium and support on the 30a.Then, roller 29 preferably will constitute the rotating force structure that bears the cam 60 that is connected on the camshaft 3.Its reason is, by roller being supported the swing state between 30a enforcement carbon element processing may command roller 29 and roller support 30a, thus, can the roller that the rotating force of cam 60 is delivered to as the part of roller body 28 be supported on the 30a the just to-and-fro motion of conversion plunger efficiently by said roller 29.
Therefore, if the tappet structure body of such formation 6 can be done the high speed to-and-fro motion repeatedly and for a long time corresponding to the rotation that is connected in the cam 60 on the camshaft 3.
2. roller body
(1) basic comprising
Roller body 28 has cylinder 30 and is installed in the inside of shell 27 shown in Figure 16 (a)~(c), and simultaneously, preferably integral body is to be made of the tabular body that holds the flat circle shape that a steel constitutes.Yet the variation of the illustrated roller body 28 of Figure 21~Figure 24 all can be used according to reality.
In addition, shown in Figure 16 (a), in cylinder 30, be provided with the roller support 30a that inner side surface is suitable for roller 29 outer side surfaces.In addition, in the top center portion of cylinder 30, be integrally formed with outstanding contacting part 30c to plunger 54.Then, in the lateral edge portion of this cylinder 30, preferably be wholely set the thin plate supporting portion 30d that is used for supported spring thin plate 26.
(2) pass through the hole
(2)-1 number and shape
The number of passing through the hole and the shape that are located on the roller body there is no particular restriction, but for example, preferably establish 1~10 circle and pass through the hole.
Its reason is, though have only 1 should be by the hole, by considering its size and configuration, also can make the spring side lubricant oil or lubricated with fuel-efficient flow to the cam side.And the said number in hole of passing through then might be difficult to be configured on the roller body or be difficult to be shaped if surpass 10.
Therefore, will being located at by the number in hole in 2~8 the scope, being the best in 2~6 scopes to better.
In addition, when being positioned at spring thin plate above the roller body and also being provided with, preferably the number of passing through the hole of roller body is done equally or still less with the number of passing through the hole of spring thin plate by the hole.
Yet,, be good preferably to be substantial circle by the shape in hole.But other ellipse, square, random shape or ditch shape also can in this way.
(2)-2 configuration
In addition, as Figure 16 (b) and shown in Figure 20, the hole 30b that passes through that preferably will be located on the roller body 28 becomes radial shape configuration around roller body.In the example of Figure 16 (b), 2 are balanced configuration by hole 30b with respect to the 30c of center projections portion.
Its reason is, by such formation, no matter the combinatorial phase of tappet structure body how, and all can easily form interconnecting part between the spring thin plate.Therefore, even a large amount of fuel, also can be more promptly by passing through hole 30b as the part of interconnecting part.
In addition, if such hole of passing through disposes, also can more easily be shaped and pass through the hole.Also have, will dispose like this, also can reduce the reduction of the mechanical strength of roller body by the hole.
In addition, about the configuration by hole 30b,, this is arranged to obliquely above roller body 28 be through to non-column rolling part by hole 30b, as side face preferably as Figure 16 (b) and shown in Figure 21.
Its reason is, if such configuration of passing through hole 30b can not closed because of the action of roller.Therefore, even high-speed driving cam and plunger also can make lubricant oil or lubricated with fuel more freely discrepancy between cam chamber and spring holding chamber by the hole by this.
(2)-3 diameter
In addition, preferably consider decision again after the fuel throughput of unit time as Figure 16 (b) and the illustrated diameter of Figure 21 by hole 30b, but by hole 30b being substantive when circular, preferably make the value of its diameter in the scope of 0.5~12mm.
Its reason is, if said diameter by the hole is less than 0.5mm, make sometimes lubricant oil or lubricated with the fuel freedom by becoming difficult.Therefore, and use the accumulator fuel injection device (charged piston) of the plunger booster device that is connected on the said fuel feed pump, for example, be difficult to reach the above condition of high voltage of 50MPa sometimes.
Said diameter by the hole is if then reduce the mechanical strength of roller body sometimes greater than 12mm, or reduces durability.
Therefore, said diameter by the hole with in the scope of 1~10mm for better, being the best in 2~6mm scope.
(3) guiding path
In addition, as (a) of Figure 21 and Figure 22 and (b), preferably with above-mentioned when being arranged to above roller body 28, be through to non-column rolling part, be provided with in this place that contains the opening portion by hole 30b above roller body 28 and make lubricant oil or the lubricated guiding path 33 that passes through with fuel by hole 30b.
Its reason is by such guiding path that is shaped, can prevent effectively that lubricant oil or the lubricated fuel stays of using are on roller body 28, its result, even lubricant oil or lubricated turnover with the fuel freedom that becomes is high-speed driving cam and plunger, the also a large amount of fuel of pressure treatment fully.
In addition, as (a) of Figure 21 and Figure 22 and (b), preferably with above-mentioned when being arranged to above roller body 28, be through to non-column rolling part, be provided with in this place that contains opening portion and make lubricant oil or the lubricated guiding path 35 that passes through with fuel by the lower side of hole 30b by hole 30b.
Its reason is by such guiding path that is shaped, can prevent effectively that lubricant oil or the lubricated fuel stays of using are below roller body 28, its result, even lubricant oil or lubricated turnover with the fuel freedom that becomes is high-speed driving cam and plunger, the also a large amount of fuel of pressure treatment fully.
Therefore, by the such guiding path that respectively is shaped of the upper and lower at roller body, even when the cam of high-speed driving fuel feed pump and plunger increase the fuel discharge-amount, lubricant oil or lubricatedly also can not hinder the action of plunger, pressure treatment fuel fully with fuel.
3. surface of contact
In addition, preferably with the both sides of the surface of contact of roller body and plunger, or any one party is set as curved surface structure.
Though there is not diagram, specifically, preferably with the surface of contact both sides of the roller body shown in Fig. 8 (a)~(c) 28 with plunger 54, or wherein a side is set as, and for example radius of curvature is the curved surface structure of 30mm~2000mm scope.
Its reason is by importing such curved surface structure, even high-speed driving cam and plunger also can prevent the load deviation between plunger and roller body, to prevent burn or damaged, the durability of raising plunger etc.That is to say, should be corresponding to the supercharging type accumulator fuel injection device, even when the cam of high-speed driving fuel feed pump and plunger, also can improve the durability of plunger etc., fully pressure treatment fuel.
Utilize possibility on the industry
As described above, according to fuel feed pump of the present invention, by said connection is set Even section when the high-speed driving plunger, also can make lubricating oil or the lubricated fuel of using in the spring holding chamber And rapid and smooth passing through between cam chamber. Particularly by thin with specific spring by the hole The cooperation of plate and tappet structure body, even a large amount of lubricating oil or lubricated use fuel, also can be fast Speed and pass through smoothly.
Therefore, fuel feed pump of the present invention can according to actual needs, with coaxial thick stick, be done Accumulator fuel injection device (APCRS:Amplified for the fuel pressure boost that utilizes big flow The fuel feed pump of the usefulness Piston Comnmon Rail System)) uses.
In addition, specific by the hole by arranging according to tappet structure body of the present invention, can reduce In the time of the pressure fluctuation that caused by the high-speed driving plunger, even a large amount of lubricated fuel of using, also Can pass through rapidly and smoothly.
Therefore, even the fuel that tappet structure body of the present invention is used in big flow carries out machinery During the fuel feed pump that uses in the accumulator fuel injection device of formula supercharging, because of by specific By the hole, make a large amount of lubricating oil or lubricate to pass in and out between spring side and cam with fuel freely, Make these lubricating oil or lubricate the action that can not hinder plunger with fuel, the high-speed driving plunger is become Easily.

Claims (6)

1. fuel feed pump that has handspike tectosome and spring thin plate is characterized by:
The spring holding chamber of used spring and accommodating is used for being provided for making lubricant oil or lubricated interconnecting part of coming in and going out with fuel between the cam chamber of the cam that the lifting plunger uses when being used to keep falling plunger,
Above-mentioned handspike tectosome contains roller and roller body, and above-mentioned roller body has the hole of passing through, should be through to the position that the slide part above-mentioned cam chamber in addition between above-mentioned roller body and above-mentioned roller is opened by the spring holding chamber side that the hole is configured to above above-mentioned roller body
Above-mentioned by the part of hole as above-mentioned interconnecting part, become unique above-mentioned lubricant oil or the lubricated road of passing through that the spring holding chamber side that makes above-mentioned roller body and cam chamber side are communicated with fuel.
2. the fuel feed pump as being put down in writing in the claim 1, it is characterized by, the spring holding part of above-mentioned spring thin plate used spring when having the plunger that keeps falling in the above-mentioned fuel feed pump be used to brake the plunger assembly department of this plunger in, around above-mentioned plunger assembly department, be provided with as the part of above-mentioned interconnecting part be used to make lubricant oil or lubricatedly pass through the hole with what fuel passed through.
3. the fuel feed pump as being put down in writing in the claim 2 is characterized by, and is provided with a plurality of above-mentionedly by the hole time, should be radial or half radial configuration around above-mentioned plunger assembly department by the hole.
4. the fuel feed pump as being put down in writing in the claim 1 is characterized by, and the hole of passing through of a plurality of above-mentioned roller bodies is set, and should be configured on the peripheral direction of above-mentioned roller body by the hole.
5. the fuel feed pump as being put down in writing in the claim 1 is characterized by, and on above-mentioned roller body and contain above-mentioned opening portion by the hole everywhere, is provided with and is used to make above-mentioned lubricant oil or the lubricated guiding path that passes through with fuel.
6. the fuel feed pump as being put down in writing in the claim 1 is characterized by, and at the opening portion that contains the lower side by the hole of above-mentioned roller body everywhere, is provided with and is used to make above-mentioned lubricant oil or the lubricated guiding path that passes through with fuel.
CNB2003801004353A 2002-10-29 2003-10-27 Fuel supply pump and tappet structure body Expired - Fee Related CN100485183C (en)

Applications Claiming Priority (4)

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JP2002313763A JP2004150290A (en) 2002-10-29 2002-10-29 Pump for supplying fuel and tappet structure
JP313763/2002 2002-10-29
JP004013/2003 2003-01-10
JP120627/2003 2003-04-24

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DE102008001871A1 (en) * 2008-05-20 2009-11-26 Robert Bosch Gmbh High-pressure fuel pump
KR101639674B1 (en) * 2009-04-20 2016-07-14 얀마 가부시키가이샤 Fuel injection pump
CN103189649B (en) * 2010-08-09 2016-04-13 博世株式会社 High-pressure service pump
DE102010063328A1 (en) * 2010-12-17 2012-06-21 Robert Bosch Gmbh high pressure pump
JP5459329B2 (en) * 2012-01-31 2014-04-02 株式会社デンソー Supply pump
EP2660459B1 (en) * 2012-05-03 2016-04-06 Delphi International Operations Luxembourg S.à r.l. Load reduction
GB2533610A (en) * 2014-12-22 2016-06-29 Gm Global Tech Operations Llc Fuel unit pump and internal combustion engine comprising it
JP7190860B2 (en) * 2018-10-05 2022-12-16 株式会社ジャパンエンジンコーポレーション Water injection pump

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JPS61134566U (en) * 1985-02-12 1986-08-22
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