CN215408912U - Diaphragm carburetor with manual enrichment function for oil tank arranged above carburetor - Google Patents

Abstract

The utility model relates to a diaphragm type carburetor with a manual enrichment function, wherein an oil tank is arranged above the carburetor, and the diaphragm type carburetor comprises an upper body, a middle body, a lower body and an enrichment valve of the carburetor, wherein a mixing chamber is arranged in the upper body, and the upper body is connected with an oil return port of the oil tank through an oil return pipe; the bottom of lower body is equipped with the oil inlet mouth, and the oil inlet mouth passes through the pipeline and is connected with the oil-out. Because the oil inlet needle valve of the oil inlet system of the diaphragm carburetor is always in a normally closed position under the action of the needle valve spring, even if the oil tank is positioned above the carburetor, fuel oil cannot enter a metering cavity of the carburetor. The fuel tank is arranged higher than the carburetor, the lowest surface of the fuel tank is higher than the metering cavity of the carburetor, the fuel return pipe, the fuel inlet nozzle and the enrichment valve are arranged, and before the engine is started, the enrichment valve is squeezed by hands to inject fuel into the engine, so that the engine is easy to start, and the problem of difficulty in starting the engine is solved. The problem that the oil inlet needle valve of the diaphragm type carburetor cannot be normally closed to feed oil is solved.

Description

Diaphragm carburetor with manual enrichment function for oil tank arranged above carburetor

Technical Field

The utility model relates to a diaphragm type carburetor, in particular to a diaphragm type carburetor which is used for enabling an oil tank to be arranged above a carburetor and is provided with manual enrichment.

Background

The carburetor is a very important accessory of the gasoline engine, is the heart of the engine, mixes a certain amount of fuel with air, and respectively provides required mixed gas according to the requirements of the engine under various working conditions so as to ensure the normal operation of the engine. At present, the types of carburetors on the market are various, and diaphragm carburetors and float carburetors are available, and butterfly valves, rotary valves and the like are available in the diaphragm carburetors. The engine is difficult to start in the prior art; the oil tank is arranged higher than the carburetor, the lowest surface of the oil tank is higher than the metering cavity of the carburetor, and the oil inlet needle valve of the diaphragm carburetor is normally closed under the action of the needle valve spring so that oil cannot be fed.

For example, the chinese invention application with the application number of 03233510.5 discloses a carburetor, wherein a manual enrichment valve and a manual enrichment valve operator are installed on a body, an enrichment valve air inlet pipe and a mixed oil air port are arranged on the body, the enrichment valve air inlet pipe is communicated with the manual enrichment valve from an carburetor air inlet, the mixed oil air port is communicated with the inner side of a carburetor throttle valve from the manual enrichment valve, the carburetor air inlet is also arranged on the carburetor at the vacuum valve air inlet, and an auxiliary air inlet device is further installed on the enrichment valve and communicated with the enrichment valve air inlet pipe. The simple auxiliary air inlet device is arranged, the defect that an air inlet pipe of the enrichment valve is small is overcome, the mixed oil gas amount of the enrichment valve is increased, the cold start problem of the original carburetor with a small displacement specification when the carburetor is used on a large displacement engine is solved, the carburetor can share one carburetor with an adjacent parameter, and the specification and the type of the carburetor are reduced. However, the carburetor uses a manual enrichment valve to enrich the mixed gas, the accuracy is not high, and it cannot be guaranteed that enough fuel oil is generated in a metering cavity of the carburetor to drive the carburetor to work.

Disclosure of Invention

Based on the problems, the utility model provides a diaphragm type carburetor with a manual enrichment function, wherein an oil tank is arranged above the carburetor, and aims to solve the problem of difficulty in starting an engine. Therefore, the utility model adopts the following technical scheme.

The utility model relates to a diaphragm type carburetor with a manual enrichment function, wherein an oil tank is arranged above the carburetor, the diaphragm type carburetor comprises an upper body, a middle body, a lower body and an enrichment valve of the carburetor, an oil return pipe is further arranged in the carburetor, and the oil return pipe is connected with an oil return opening of the oil tank; an oil inlet nozzle is further arranged in the carburetor and is connected with an oil outlet of the oil tank through a pipeline. Because the oil inlet needle valve of the oil inlet system of the diaphragm carburetor is always in a normally closed position under the action of the needle valve spring, even if the oil tank is positioned above the carburetor, fuel oil cannot enter a metering cavity of the carburetor. The fuel tank is arranged higher than the carburetor, the lowest surface of the fuel tank is higher than a metering cavity of the carburetor, and fuel is injected into the engine by pressing the enrichment valve with hands before the engine is started through arranging the fuel return pipe, the fuel inlet nozzle and the enrichment valve, so that the engine is easy to start, and the problem of difficulty in starting the engine is solved; therefore, the problem that the oil inlet needle valve of the diaphragm carburetor cannot be normally closed to feed oil is solved.

The oil return pipe on the carburetor is communicated with the oil inlet nozzle, and the oil return pipe is communicated with the oil return port on the oil tank through a pipeline, so that fuel oil in the oil tank forms a loop through the pipeline, the oil inlet nozzle, the oil return pipe, the pipeline and the oil return port, the front end of the needle valve seat is filled with the fuel oil, and the oil supply preparation is made for pumping the fuel oil into the carburetor by squeezing the enrichment valve by hand before starting.

Preferably, the enrichment valve is made of rubber, but other soft materials that can resist oil are also possible.

In any of the above schemes, preferably, one end of the enrichment valve is provided with an enrichment pipe, and the other end is provided with a vent hole.

Before the engine is started, when the oil needs to be pumped into the carburetor, the air vent of the enrichment valve is blocked by hand, the oil pumping ball is squeezed to deform, the positive pressure generated in the enrichment valve pushes the oil suction diaphragm to move upwards, the spindle on the oil suction diaphragm pushes the rocker arm to open the needle valve, the front end of the needle valve seat is filled with fuel oil, the fuel oil automatically enters the metering chamber of the carburetor under the action of the self weight of the fuel oil, the fuel oil is repeatedly squeezed for several times, the fuel oil automatically enters the metering chamber from the oil tank under the action of the self weight of the fuel oil, then the positive pressure in the enrichment valve pushes the oil suction diaphragm, and the fuel oil in the metering chamber is pushed by the oil suction diaphragm to enter the main nozzle of the carburetor and is sprayed into the carburetor through the main nozzle.

In any of the above schemes, preferably, the upper body comprises a main nozzle, an air inlet cavity, a mixing chamber, a choke, a throttle valve and a body oil inlet, and the mixing chamber is provided with an oil pumping pulse punching hole and a transition hole.

In any of the above solutions, it is preferable that the carburetor is provided with an idle oil passage, and the oil passage includes an idle oil outlet, an idle adjustment oil needle, a transition chamber, and an idle metering orifice.

In any of the above schemes, preferably, the carburetor further comprises an oil supply system, wherein the oil supply system comprises a metering chamber with a metering cavity on the middle body, an oil suction diaphragm provided with a mandrel, an oil pumping diaphragm, a one-way valve, a rocker arm, a needle valve, an oil return pipe and an oil passing hole of the middle body.

In any of the above aspects, it is preferred that the metering chamber is provided with a metering cavity; the oil absorption membrane is provided with a mandrel.

In any of the above schemes, preferably, the oil pumping membrane is provided with a tongue piece a and a tongue piece B; the rocker arm is provided with a float pin.

The body is provided with an oil return pipe which leads to an oil return port of the oil tank and is communicated with the atmosphere, and fuel oil can enter the front end of the needle valve seat through an upper oil way under the condition of dead weight. When the vent hole of the enrichment valve is blocked by a hand and the enrichment valve is squeezed, the volume of the enrichment valve is reduced, the air pressure in the enrichment valve is increased, so that the oil absorption diaphragm is pushed to move upwards, then the mandrel on the oil absorption diaphragm pushes the rocker arm to rotate around the float pin, the float pin drives the needle valve to move up and down, the needle valve is opened, and fuel oil automatically enters the metering cavity. When the hand for squeezing the enrichment valve is released, the lower part of the metering cavity is communicated with the atmosphere due to the upper vent hole on the enrichment valve, the oil absorption membrane pushes the rocker arm and the oil absorption membrane to move downwards under the action of the needle valve spring, and the rocker arm drives the needle valve to move upwards, so that the needle valve is closed.

In any of the above schemes, preferably, a high-speed adjusting oil needle is arranged inside the body, and the adjusting oil needle is provided with a high-speed oil inlet and a main air volume hole.

In any of the above aspects, preferably, the lower body comprises an oil inlet nozzle and a filter screen.

Drawings

These and other characteristic aspects and advantages of the present invention will now be described, as preferred but not limiting embodiments thereof, will become apparent upon reading the following detailed description with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a preferred embodiment of a diaphragm carburetor according to the present invention having manual enrichment of the fuel tank disposed above the carburetor.

FIG. 2 is a left side view of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor according to the present invention.

FIG. 3 is a rear view of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor according to the present invention.

FIG. 4 is a cross-sectional view of the pulse port location of the preferred embodiment of FIG. 1 with a manual enrichment diaphragm carburetor according to the present invention with the fuel tank positioned above the carburetor.

FIG. 5 is a sectional view taken in the direction A-A of the preferred embodiment of FIG. 2 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor in accordance with the present invention.

FIG. 6 is a sectional view taken in the direction B-B of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor in accordance with the present invention.

FIG. 7 is a cross-sectional view of the enrichment valve of the preferred embodiment of FIG. 1 with a manual enrichment diaphragm carburetor for use with an oil tank positioned above the carburetor according to the present invention.

FIG. 8 is a cross-sectional view of the preferred embodiment of the idle orifice of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor in accordance with the present invention.

FIG. 9 is a cross-sectional view of the primary air port of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor according to the present invention with the fuel tank positioned above the carburetor.

FIG. 10 is a cross-sectional view of the high speed adjustment needle of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor in accordance with the present invention.

FIG. 11 is a cross-sectional view of the needle oil inlet passage of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor in accordance with the present invention.

FIG. 12 is a schematic illustration of the enrichment valve of the preferred embodiment of FIG. 1 with a manual enrichment diaphragm carburetor for use with an oil tank positioned above the carburetor according to the present invention.

FIG. 13 is a schematic illustration of the oil intake system of the preferred embodiment of FIG. 1 with a manually enriched diaphragm carburetor for use with an oil tank positioned above the carburetor according to the present invention.

FIG. 14 is a schematic view of the installation of a diaphragm carburetor with manual enrichment for an oil tank above the carburetor according to the present invention, between the fuel tank and the carburetor.

Fig. 15 shows a block diagram and a broken-away view of a diaphragm carburetor according to the utility model with manual enrichment for a fuel tank located above the carburetor (a corresponds to fig. 5, b corresponds to fig. 6, c corresponds to fig. 8, d corresponds to fig. 9, e corresponds to fig. 10, f corresponds to fig. 11, g corresponds to fig. 13).

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

Referring now to the drawings, FIGS. 1-10 depict a block diagram of the external form of the carburetor of the present invention. A diaphragm type carburetor with manual enrichment is used for placing an oil tank above a carburetor, and comprises an upper body 10, a middle body 20, a lower body 30 and an enrichment valve 40 of the carburetor, wherein an oil return pipe 27 is further arranged in the carburetor, and the oil return pipe 27 is connected with an oil return port 61 of an oil tank 60; the bottom of the lower body 30 is provided with an oil inlet nozzle 31 connected with an oil outlet 62 of the oil tank 60 through a pipe. Because the oil inlet needle valve of the oil inlet system of the diaphragm carburetor is always in a normally closed position under the action of the needle valve spring, even if the oil tank is positioned above the carburetor, fuel oil cannot enter a metering cavity of the carburetor. The oil tank 60 is arranged higher than the carburetor, the lowest surface of the oil tank 60 is higher than the metering cavity of the carburetor, and the oil return pipe 27, the oil inlet nozzle 31 and the enrichment valve 40 are arranged, so that fuel oil is injected into the engine by pressing the enrichment valve by hand before the engine is started, the engine is easy to start, and the problem of difficult starting of the engine is solved; therefore, the problem that the oil inlet needle valve of the diaphragm carburetor cannot be normally closed to feed oil is solved.

The oil return pipe 27 on the carburetor is communicated with the oil inlet nozzle 31 (shown in figures 11 and 13), and the oil return pipe 27 is communicated with the oil return port 61 on the oil tank 60 (shown in figure 14) through a pipeline, so that fuel in the oil tank forms a loop through the first pipeline 63, the oil inlet nozzle 31, the oil return pipe 27, the second pipeline 64 and the oil return port 61, the front end of the needle valve seat is filled with the fuel, and the fuel is prepared for pumping the fuel into the carburetor by pressing the enrichment valve by hand before starting.

In this embodiment, enrichment valve 40 is made of rubber, but may be made of other soft materials that can resist oil.

In this embodiment, enrichment valve 40 has an enrichment tube 41 at one end and a vent 42 at the other end.

Before the engine is started, when oil needs to be pumped into the carburetor, the vent hole 42 of the enrichment valve 40 is blocked by hand, an oil pumping ball is squeezed to deform the oil pumping ball, the positive pressure generated in the enrichment valve 40 pushes the oil suction diaphragm 22 to move upwards, the spindle 221 on the oil suction diaphragm 22 pushes the rocker arm 25 to open the needle valve 26, the front end of the needle valve seat is filled with fuel oil, the fuel oil automatically enters the metering chamber 21 (shown in figure 5) of the carburetor under the action of the self weight of the fuel oil from the oil tank 60 due to the fact that the front end of the needle valve seat is filled with the fuel oil, the fuel oil repeatedly squeezes for several times, the fuel oil automatically enters the metering chamber 21 under the action of the self weight of the fuel oil, then the positive pressure in the enrichment valve 40 pushes the oil suction diaphragm 22, and the fuel oil in the metering chamber 21 is pushed by the oil suction diaphragm 22 to the main nozzle 11 (shown in figure 5) of the carburetor, and is sprayed into the carburetor through the main nozzle 11 (shown in figure 12).

In the embodiment, the upper body 10 comprises a main nozzle 11, an air inlet cavity 12, a mixing chamber 13, a throat 14, a throttle valve 17 and a body oil inlet 18, wherein a pump oil pulse punching hole 15 and a transition hole 16 are formed in the mixing chamber 13.

In the present embodiment, the carburetor is provided with an idle oil passage including the throttle valve 17 including an idle oil outlet 171, an idle adjustment oil needle 172, a transition chamber 173, an idle orifice 174, and an idle air orifice 175.

In this embodiment, the carburetor also includes an oil supply system including a metering chamber 21 with a metering chamber 211 in the center body 20, an oil suction diaphragm 22 with a spindle 221, an oil pumping diaphragm 23, a check valve 24, a rocker arm 25, a needle valve 26, an oil return tube 27, and a center body oil passage hole 28.

In the present embodiment, the metering chamber 21 is provided with a metering cavity 211; the oil absorption film 22 is provided with a mandrel 221.

In this embodiment, the oil pumping diaphragm 23 is provided with a tongue a231 and a tongue B232; the rocker arm 25 is provided with a float pin 251.

As shown in fig. 14, the upper body 10 is provided with a return pipe 27, and the return pipe 27 is connected to a return port 61 of the oil tank 60 and communicated with the atmosphere, so that the fuel can enter the front end of the needle valve seat through the upper oil passage under the self-weight condition. When the vent hole 42 of the enrichment valve 40 is blocked by hand and the enrichment valve 40 is pressed, the volume of the enrichment valve 40 is reduced, the air pressure in the enrichment valve 40 is increased, so that the oil suction diaphragm 22 is pushed to move upwards, then the spindle 221 on the oil suction diaphragm 22 pushes the rocker arm 25 to rotate around the float pin 251, the rocker arm 25 drives the needle valve 26 to move upwards and downwards, the needle valve 26 is opened, and fuel automatically enters the metering cavity 211. When the hand pressing the enrichment valve 40 is released, because the enrichment valve 40 is provided with the upper vent hole 42, the lower part of the metering cavity 211 is communicated with the atmosphere, the oil absorption diaphragm 22 pushes the rocker arm 25 and the oil absorption diaphragm 22 to move downwards under the action of the needle valve spring, and the rocker arm 25 drives the needle valve 26 to move upwards, so that the needle valve 26 is closed.

In the present embodiment, a high-speed adjusting oil needle 50 is provided inside the upper body 10, and the adjusting oil needle is opened with a high-speed oil inlet 51 and a main air volume hole 52 (see fig. 9 and 10).

In the present embodiment, the lower body 30 includes an oil inlet 31 and a screen 32.

Referring next to FIG. 8, a cross-sectional view of the preferred embodiment of the idle orifice of FIG. 1 with a manually enriched diaphragm carburetor for use with a fuel tank positioned above the carburetor according to the present invention is shown.

The idle oil circuit runs as follows: as shown in fig. 8 and 6, when the fuel enters the metering chamber 211, the fuel flows from the metering chamber 211 → the check valve 24 → the idle metering hole 174 → the fuel is mixed with the air entering from the idle air metering hole 175 → the transition chamber 173 → the idle adjustment oil needle 172 → the fuel flows out of the idle outlet 171, and is mixed with the air flowing from the throttle valve 17 to form a mixture, which is provided to the engine for combustion work.

As shown in fig. 9 and 10, this structure is provided with a high-speed oil passage including a main air hole 52, a high-speed adjusting oil needle 50, a main nozzle 11, and the like. The fuel in the metering cavity 211 enters from the high-speed oil inlet 51 → flows into the main nozzle 11 through the clearance between the high-speed adjusting oil needle 50 and the small hole of the body, then is mixed with the air entering from the main air metering hole 52, and then is sprayed out from the main nozzle 11 to the throat of the carburetor (as shown in figure 5), and is mixed and atomized with the air entering from the air inlet to form a mixed gas which is supplied to the combustion work of the engine.

The utility model relates to a diaphragm carburetor with manual enrichment, wherein an oil tank is arranged above the carburetor, and the working process of the diaphragm carburetor is as follows:

before the engine is started, the enrichment valve 40 is squeezed by hands to additionally spray fuel oil into the carburetor, so that the mixed gas is relatively rich, and the engine is convenient to start.

After the engine is started, the engine is in idle working condition, at the same time, the throttle valve of the carburetor is in a position with small opening degree (shown in figure 6), air enters from the air inlet cavity 12 of the carburetor and flows into the throttle valve 17 through the throat pipe of the carburetor, because the opening degree of the throttle valve 17 is small in idle state, air can only flow through the periphery of the throttle valve 17, when air flows through the idle oil outlet 171, a certain amount of vacuum degree is generated when air flows through the periphery of the throttle valve 17, so that fuel oil is sucked out from the idle oil outlet 171 and is mixed with the air entering from the periphery of the throttle valve 17 to form mixed gas, the mixed gas is provided for the engine to be combusted to do work, and power is output outwards. On the other hand, another part of the air entering from the intake chamber 12 enters from the idle air hole 175, and when passing through the idle hole 174, the fuel is sucked out from the metering chamber 211 through the idle hole 174, then flows into the transition chamber 173, and then is mixed with the air flowing from the transition hole 16 again, so that the secondary air mixture is input into the idle adjustment oil needle 172 and is ejected from the idle outlet port 171. The idle air hole 175 is used for permeating a certain amount of air into the idle oil way, so that the idle oil way has higher fuel oil foaming degree, smaller atomized fuel oil particles, better atomization effect and more sufficient combustion in an engine.

When the engine is in the fully open position, fuel is supplied to the engine through the high-speed oil path, as shown in fig. 5 and 10, when air enters from the air inlet cavity 12 of the carburetor, the air flows through the throat 14 to generate vacuum, fuel in the metering cavity 211 of the carburetor is sucked out by the vacuum suction force, the fuel flows through the high-speed oil inlet 51, the high-speed oil passes through the high-speed adjusting oil needle 50, is mixed with air entering from the main air metering hole 52 and then is sprayed out from the main nozzle 11, and the sprayed fuel is mixed with the air entering from the air inlet cavity 12 to form mixed gas, so that the mixed gas is used for combustion work of the engine, and power is output outwards. In addition, as shown in fig. 9 and 10, another part of the air entering from the air inlet chamber 12 enters from the main air quantity hole 52 and then enters the high-speed adjusting oil needle 50 to be mixed with the fuel entering from the high-speed oil inlet 51 of fig. 10 to form a mixed gas. In the same way, the main air metering holes 52 have the function of infiltrating a certain amount of air into the high-speed oil way, so that the foaming degree of the fuel oil in the high-speed oil way is higher, the atomized particles of the fuel oil are smaller, the atomization effect is better, and the combustion in the engine is more sufficient.

Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present invention. The scope of the present invention is defined by the appended claims, and may include various modifications, alterations, and equivalents made thereto without departing from the scope and spirit of the utility model.

Claims (10)

1. A diaphragm carburetor with manual enrichment for an oil tank placed above a carburetor, comprising an upper body (10), a middle body (20), a lower body (30) and an enrichment valve (40) of the carburetor, characterized in that: an oil return pipe (27) is also arranged in the carburetor, and the oil return pipe (27) is connected with an oil return port (61) of an oil tank (60); the carburetor is also internally provided with an oil inlet nozzle (31) which is connected with an oil outlet (62) of an oil tank (60) through a pipeline.

2. A diaphragm carburetor according to claim 1, having manual enrichment for a fuel tank disposed above the carburetor, wherein: the enrichment valve (40) is made of rubber.

3. A diaphragm carburetor according to claim 1 or 2, having manual enrichment for a fuel tank disposed above the carburetor, wherein: one end of the enrichment valve (40) is provided with an enrichment pipe (41), and the other end is provided with a vent hole (42).

4. A diaphragm carburetor according to claim 1, having manual enrichment for a fuel tank disposed above the carburetor, wherein: the upper body (10) comprises a main nozzle (11), an air inlet cavity (12), a mixing chamber (13), a choke (14), a throttle (17) and a body oil inlet hole (18), wherein a pump oil pulse punching hole (15) and a transition hole (16) are formed in the mixing chamber (13).

5. A diaphragm carburetor according to claim 1, having manual enrichment for a fuel tank disposed above the carburetor, wherein: the carburetor is provided with an idle oil path, wherein the idle oil path comprises a throttle valve (17) comprising an idle oil outlet (171), an idle adjusting oil needle (172), a transition cavity (173), an idle metering orifice (174) and an idle air metering orifice (175).

6. A diaphragm carburetor according to claim 1, having manual enrichment for a fuel tank disposed above the carburetor, wherein: the carburetor also comprises an oil supply system, wherein the oil supply system comprises a metering chamber (21) with a metering cavity (211) on the middle body (20), an oil suction diaphragm (22) provided with a mandrel (221), an oil pumping diaphragm (23), a one-way valve (24), a rocker arm (25), a needle valve (26), an oil return pipe (27) and a middle body oil passing hole (28).

7. A diaphragm carburetor according to claim 6 having manual enrichment for a fuel tank disposed above the carburetor, wherein: the metering chamber (21) is provided with a metering cavity (211); the oil absorption membrane (22) is provided with a mandrel (221).

8. A diaphragm carburetor according to claim 6 having manual enrichment for a fuel tank disposed above the carburetor, wherein: the oil pumping diaphragm (23) is provided with a tongue piece A (231) and a tongue piece B (232); the rocker arm (25) is provided with a float pin (251).

9. A diaphragm carburetor according to claim 1 or 4 having manual enrichment for a fuel tank disposed above the carburetor, wherein: the interior of the upper body (10) is provided with a high-speed adjusting oil needle (50) which is provided with a high-speed oil inlet (51) and a main air volume hole (52).

10. A diaphragm carburetor according to claim 1, having manual enrichment for a fuel tank disposed above the carburetor, wherein: the lower body (30) comprises an oil inlet nozzle (31) and a filter screen (32).

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