JPS59128972A - Fuel feed device of engine - Google Patents

Abstract

PURPOSE:To improve the fuel automization and to sufficiently atomize and feed the fuel required for an engine in the whole operation area by pressurizing the air and feeding the fuel in its stream. CONSTITUTION:A pressurized air passage 7 is constituted of a suction passage 15 from the upstream side of the Venturi 10 of an intake air passage 3 to the suction port of an air pressurizing pump 5 and a discharge passage 13 including a mixing chamber 11 and a regulator 14, a fuel passage 9 has a fuel pressurizing pump 16 and a regulating mechanism 8, and the fuel in a fuel tank 17 is pressurized with the said pump 16 driven by a prime mover 18. When the air pressure in the mixing chamber 11 is reduced due to the Venturi negative pressure generated in conjunction with the engine operation, the fuel is fed into the mixing chamber 11 in accordance with the pressure difference, is mixed with the pressurized air stream and atomized, and flows into the intake air passage 3 through a mixture passage 12.

Description

[Detailed description of the invention] 8:! The present invention relates to an engine, mainly a device for supplying fuel to a gasoline engine of a private car.One of the important issues in supplying fuel together with air to an engine is the prevention of fine particles of fuel. It is. In the fixed venturi type carburetor, which is the most common type of device that mixes air and fuel and supplies it to the engine, the fuel is sucked out into the intake passage using the pressure generated by the intake air. Therefore, with the amount of intake air near the idle link, sufficient venturi negative pressure is generated to suck out fuel.
Since it is not possible to do so, a sumi-boat and an idle boat are opened at the end of the throttle valve and downstream of the throttle valve so that the high pressure generated in the intake pipe 1' downstream of the throttle valve causes the fuel to be sucked out into the intake passage. According to this configuration, fuel atomization is good near the idling and in the high-speed operating range, but is the orifice well opening greater than the idling opening? Then, as the venturi negative pressure increases and the venturi negative pressure becomes high <lx, the fuel dies near the point where the main fuel starts to be sucked out.i) The atomization becomes poor, and when the carburetor becomes larger, the venturi II t'! If the pressure is low (?C), the start of suction of the main fuel will be delayed and the fuel will become atomized and the connection with the low?i fuel will deteriorate to P.For this reason, a two-stage carburetor is used in a normal automatic% engine. It is normal to prevent a drop in venturi pressure by making the venturi smaller in diameter, but the connection between the single-stage 1f (II) carburetor and the bifurcated side carburetor is not only problematic.

It is unavoidable that things will get complicated in terms of the cost. Even in a crop injection device that supplies pressurized fuel to an intake air flow to an IIR) C engine, it is possible to avoid poor fuel atomization in a region where the amount of intake air is small. This problem can be avoided in the low-speed operating range of the engine.The above-mentioned problem can be solved by atomizing the fuel required by the engine into light particles during all operating conditions, and also by supplying GT, and moreover, without using the conventional atomizer. This invention was invented with the aim of providing a fuel supply system that can achieve the same purpose without requiring a two-stage low-speed system.

[Configuration of JIJ] And, in order to achieve this purpose, the fuel supply P of the engine according to the present invention includes a pressurized air passage equipped with a pump for pressurizing the air, and a pressure change or flow rate of the +p3 fuel. 1i41'
a fuel passage including an I' filter at f and delivering conditioned fuel to the pressurized air passage;

a mixture passageway through which the mixture of the pressurized air and fuel flows out to the intake passageway, and forest material is supplied to the pressurized air passageway in response to intake air being drawn into the engine through the intake passageway; It is characterized by the fact that Mt and Haku have been controlled for 5km, lol 1tlji (bO Next, we will explain the specific example of the present invention based on the drawings. In each drawing, l is the air cleaner and 2 is the vertical direction. 4 is a throttle valve; 5 is a pump for pressurizing nitrogen; 6 is a prime mover thereof; 7 &: is a pressurizing air passage; 8 is a fuel pressure or flow rate regulation mechanism; 9 1 shows a solvent passage. The actual winding 11 in FIG.
A mixing chamber 1 is formed on the downstream side of an air flow regulator H111 moderator 14 consisting of a sonic nozzle of a discharge path 13 of an air pressurizing pump 5 by opening a mixture passage 12 extending from the air pressurizing pump 5.
11C The outlet yH of the fuel passage 9 (419 is opened perpendicularly to the air flow. The pressurized air passage 7 is connected to the suction of the pregnant air pressurizing pump 5 from 1111 upstream of the venturi 10 of the intake ``83''. The fuel passage 9 includes a suction passage 15 leading to the mouth, and a discharge passage 13 housing the mixing chamber 11 and the 88 Ni vessel 14. IQ < t with prime mover 18
The two prime movers 6.18, which are pressurized by the pumps 16 to The fuel pressure sent to the mixing chamber 11 is the same as that of the mixing chamber 1 when the venturi negative pressure is zero.
Make sure that the air pressure of 1 and the pressure of the pre-container are equal so that the air pressure of 14.
N'' is adjusted to a constant value by the adjustment mechanism 8. When the air pressure in the mixing chamber 11 decreases due to the vent Qfl pressure generated when the engine is running, the fuel flows into the mixing chamber due to the pressure difference. 11, mixed with the pressurized air flow, atomized, and discharged from the mixing proboscis passage 12 to the intake passage 3.

%i 1fjl in Figure @2 is 0. A regulator 21 is provided in the discharge passage 20 of the air pressurization pump 5 to adjust the air pressure FtM according to the venturi negative pressure, and the outlet end 22 of the fuel passage 9 is connected to the mixing chamber 23. The axial pressure of the pressurized air flow and the fuel pressure adjusted to a constant value are equal to the venturi negative pressure of zero. The valve 21 is a needle-shaped valve 2 that is inserted into a valve seat 24 provided in the middle of the discharge passage 20 to change the area of the passage.
The diaphragm 26V fixed to the diaphragm 26V is constructed by applying the venturi negative pressure generated by the smaller venturi 1ovc' and the spring 27, and as the venturi negative pressure introduced into the negative ratio chamber 28 increases, the passage area increases, lll1r,jψ of the pressurized air flowing through the mixing chamber 23 of the discharge path 2o
By lowering the 1111 river and making the 1111 river smaller, the amount of fuel fed is increased. The structure of the other parts is probably the same as the actual example shown in FIG. 1.
An F, lj, and one-cylinder device 30 is provided to adjust the air pressure to a constant level, and a venturi 32 is installed in the mixing chamber 31 of γ4f below.
1, open the outlet 33 of the passage 9 to the venturi 32, and supply the fuel to the venturi 32.
The float type is composed of a small stream type constant oil level chamber.
1 and 1ifj-.

When the bench 2l f1 pressure of the intake 11 bar 3 is zero, the air pressure generated in the bench area 32 by the pressurized air flowing into the mixing chamber 31 and the combustion side suction force are in balance, and the fuel Y1 flows into the mixing chamber j1. It's been sent in, and it's now 5. Occurs in the small venturi 10 of the intake passage 3 as the engine runs 1
-The air pressure flowing through the venturi 32 increases due to a change in the differential pressure between the venturi negative pressure and the air pressure in the mixing chamber 31, and this changes the amount of fuel fed into the mixing chamber 31. In this example, the regulator 30 can have the same configuration as the example shown in FIG.

The 4th N carrier 1 is the discharge path 34 of the air pressurizing pump 5.
In addition, a lou cylinder 2I having the same structure as the actual sister example shown in FIG. 7 is opened to the intake passage 3 at the lower surface 1111H of the square 4, and the venturi negative pressure generated in the large venturi 38 of the intake passage is introduced into the negative pressure chamber 28 of the cylinder 21. . Penetrated. The flow of the fuel pressurized by the fuel pressurizing pump 16 is performed by the fuel pump 16.
The suction pipe negative pressure generated in the intake passage 3 at the bottom of the throttle well 4 and the spring 42 are applied to the diaphragm 41 which is inserted into the valve seat 39 provided in the passage 9 and has an inverted conical shape 9'P40 fixed to change the passage area. The suction passage 44 of the pressurized air passage 7 opens into the interior of the air cleaner J.

Two prime movers ji+46. ] s is constant for each pump 5.16 only when engine operation is q%r; gF l (f is island ■(
It's something to do.

Mixing chamber: Pass through U5 1-Ruri P air flow rate and mixing chamber 35
The raw material pressure sent to the venturi υ pressure and the suction 11
When the negative pressure is zero・Fuel is fed /C 111・
11. The height is adjusted to a constant value by 21.6° and 8. As the venturi negative pressure generated by engine operation becomes crystallized, the regulator 21 1. As the negative pressure in the suction pipe increases, the pressurized air passage 70 becomes larger.
'11 Adjustment mechanism 8 is designed to reduce the fuel passage 90 and passage 11a, and is used to reduce the air intake pipe. During idling when pressurization occurs, both pressurized air and fuel are sent into the mixing chamber 35 one by one before the engine is requested. Sufficiently atomize the starch of
As the opening of the throttle valve 4 increases, the amount of intake air increases, and the bench 2 pressure is high and the suction pipe negative pressure is low. Pressurized air and fuel delivered will increase.

The fruit 6f11 in Fig. 5 is that the suction passage 45 of the pressurized air passage 7 is opened upstream 11III of the restriction well 4 of the intake passage 3 which does not have a venturi, and the mixing IVm trace path 4G is downstream.
Open it and keep the air pressure constant in the discharge passage 47 of the air pressurizing pump 5! ! In addition, a fuel passage 90 outlet end 5 ( ) is opened in the mixing chamber 49 on the lower surface of the spear so as to cross the air flow, and the fuel is pressurized by a fuel pressurizing pump 16 . Did/r18ne2I's y, +ii li
Adjustment to adjust (ii1+, +) (j% Measurement 8 is configured so that the square 52 seated on the valve seat 51 provided in the fuel j valve path 9 is reciprocated by the solenoid 5, 11 and 16 lines. Inhaled air] T) +I!
In the example, a venturi was used, but in the nine actual examples, the suction control pressure detector 54 and the engine rotation speed (indicator 55) were used, and the T11 air signal emitted by these was
'j', the on/off ratio of the pulse uf flow input to 56 and output as the drive current of the solenoid 53 is changed as the intake air L'r;
The amount of fuel fed into the mixing chamber 49 can be changed by changing the opening time per cycle of the opening/closing operation.

In addition, in each of the examples shown in Figures 2.3 and 2.3, the venturi 10 in the intake passage 3 has a considerably large diameter due to its design and cannot generate a light venturi negative pressure. Negative pressure introduction passages 11a and 2 are opened near the throttle valve of passage 3.
3a and 31a are connected to each other as shown by the dots, and the fuel b'f output is sometimes verified to be 1 yen especially when the engine is idling and I'J is at a very low speed. It's Kade, 1st and 2nd
In each of the examples shown in the figure, the story '11 barrel adjustment structure 8 is used as shown in the example shown in Figure 4, and the fuel is supplied according to the negative pressure in the suction pipe.・"It is possible to adjust the R* of each pump 5.16 when using the Yoiko-style 1F 1st mounting 56 as in the practical example shown in Fig. 5. I + 4-% 6.] Control either of the two swords according to the intake air temperature to adjust the fuel inflow amount. In this case, the fuel pressurization pump 16
And C, where the prime mover 18 also serves as a solvent tampering mechanism, was close to history. The mixture passage 12°37.46 is located on the side or upstream 111 of the throttle box 4 or above the venturi 10.38 i+
M It':l K-Wk ('Of course it goes without saying.) Effect As described above, according to the present invention, the air is pressurized and the fuel is fed into the flow, so the fuel is Becomes a genius ψ to the light minute,
A mixture of highly pressurized air and finely divided fuel (, [I
, I, opens the mixture passage to the intake passage as it flows out to the air passage] 1st place j? F death and engine glue! (It is possible to supply well-atomized solvent to the engine with a small amount of 1% liter of air intake.Then, the fuel flow rate sent to the pressurized air passage is It is controlled according to the engine intake air needle and is atomized and flows out into the intake passage.As with Nishinomiya's carburetor, the low-j medium thread and the main system are separately provided to prevent fuel atomization failure when connected. When the fuel 11 #1 irradiation device 1〆f is low, the fuel (1j [i) becomes tx <;
In all operations of the engine, especially in the low-reduction range, the engine requires 1 filtration charge to be divided into a single part in a single system and taken as a pre-feed.

[Brief explanation of the drawing]

Figures 1, 2, 3, river 4, and d15 are xylophone 1!
, q are vertical views showing practical examples of the respective fields. 3... Intake path, 4... Throttle 9P, 5...
...Air pressurization pong, 6.18...Motive force f*, 7...Pressurization empty package passage, 8...
・Ba1°m iv, #8v structure, 9...) No.1
;1 aisle.

Claims (1)

[Scope of Claims] (1) A pressurized air passage provided with an air pressurizer. Fuel pressure or flow h￥+iij! A raw material passage in which a regulated solvent is fed into the pressurized air passage; The intake air cartridge, which bends the 1st airway and calls the 1ν2 mixture to the engine, jti
The pressurized air is sent to the four-way connection according to the fuel +7
M, I have configured it so that R will come true 111 times! F
'Fii
A regulator is provided, and below it, there is a Jatani chamber with the exit end of the fuel passage opened, and the fuel passage is equipped with a fuel pressurizing pump and a sea bream adjustment mechanism, and the fuel passage is equipped with 17. A pigment supply device according to claim 17, wherein the extending mixture passage opens into a venturi in the intake passage. (31) The fuel supply device according to claim (1), wherein the discharge passage of the air pressurizing pump is provided with an air flow rate regulator that changes the passage area according to the venturi negative pressure of the intake passage. (4) Installed a fuel pressure pump in the fuel passage in January.
2. The fuel supply device according to claim 1, wherein the adjusting mechanism is configured to change the passage area according to the specific suction pressure. (5) Ml14 blindness 1 of the air flow rate which changes the passage area according to the venturi negative pressure of the intake passage in the discharge passage of the air pressurizing pump
A book is provided on the downstream side of the fuel oil passage.
110 ru @ room is killed and fuel 11
A pump for pressurizing the fuel and a regulator P'J which changes the passage area according to the pressure of the suction pipe fi are installed in the Ii passage.
5. The mixture passage hlζi extending from the joint chamber is below the throttle valve of the intake passage θie fl? It's open to IJ! 1', f+・5
The fuel supply system described in range (1) of the i+1 request, (6) the adjustment room "Mao" guest is configured with a 111 oil storage room (
(・Features of WEH 11 sought 71 (Information i' stated in 11)
F+ supply device 71° (7) Adjustment mechanism is driven by a solenoid.
A pulse 16 is used to drive the solenoid according to the amount of intake air measured by the suction pipe negative pressure and the engine rotational speed. ．． 1. The educational collar device according to claim (1), which is configured to change the on/off ratio of the flow.