DE1476248A1 - Carburetor accessories for internal combustion engines - Google Patents

Description

DR.MÜLLER- BORi DlPL-INa QRALFS 1 4 7 6 2 A DlPL-PHYS. DR. MANITZ DIPL.-CHEM. DR. DEUFEL PATENT LAWYERS

Sep 10 1968

P 14 76 248.2 Η / Ηο - S 475

Max Yves Antonin Serruys 1o2, Hue du Bac, Paris 7o / France

/ gasifier accessories for Internal combustion engines

The invention relates to / gas accessories for internal combustion engines to reduce air pollution :; and to improve the performance of these engines.

üie invention is mainly that this Engines with a fuel-air mixture with a maximum φ stem excess air or at least with the smallest ο possible excess fuel can be fed without

¹ ^ that this will cause the motor to work incorrectly and ο

in particular, uneven ignition occurs and that the homogenization of the mixture is improved in the event of poor atomization of the fuel by the carburetor. .

It is known that the ignition of a mixture with a small excess of fuel or more or less high excess of air only slightly and evenly through the spark of the candle and an even and fast / burning Ιβε mixture only takes place, when the mixture is very homogeneous.

According to the invention, the following accessories are and Funds provided.

1. In order to reduce the charge losses at a high mixture throughput, α. ii. so with high performance, to x 'reduce, so that the power loss diminishes, eliminates, even reverses that, especially at high Rotational speeds, from the use of mixtures with a slight excess of fluid or so ^ ar with more or less excess air.

_M _ BAD ORIGINAL

# 01107/0490

H762A8

- 5 To the resurgence of the dies between i olben

and reduce cylinders, either by thinking the pressure prevailing in the crankcase below the ambient pressure or by using a variable bchlieljen the exhaust creates an object to it.

$. To allow the throttle valve to close too completely to prevent the carburetor during decelerations; a closing, the excessive negative pressure would produce, with the ignition and combustion becoming uneven or ceasing completely.

4.lim to improve the regulation of the ignition distribution, which with the known solutions is never really optimal at whatever speed and load will.

^>. To get the oasis out of the crankcase again the factor to listen to.

BAD ORIGINAL 909807/0490

The following are the means, which according to the invention to reduce air pollution from exhaust gases and gases from the crankcase internal combustion engines or to improve the thermal performance of these engines are provided, described in more detail. As can also be seen, these funds can double Fulfill the purpose and can be used separately or in the following combinations at the same time:

a) In order to obtain the desired composition of air and fuel, the regulation of the carburetor can be changed according to the invention in that preferably the diameter of the Venturi nozzle is increased and that the diameter of the main and Kor rektordttse are adjusted with a view to the function of the other means used, that in the normal case an excess of air of 10 % to Mo% and in the other work states (especially cold start, zero load, braking, acceleration or full load) still an excess of air or the smallest possible fuel excess is available·

b) In order to always find the most favorable combination of

909807/0490 _{OR | GlNAL}

To obtain substance and air in the mixture supplied to the engine is seen behind in the direction of flow The carburetor has a supply line for additional air, possibly with gas from the crankcase is mixed. The additional air is regulated:

1. by two throttling devices, sockets or Sliders that are arranged one behind the other and one of which is directly or indirectly caused by the rotation of the The carburetor throttle valve is operated while the other directly or indirectly through the movements of a deformable system (bellows, diaphragm, piston with cylinder slide) is actuated, which on the one hand the prevailing negative pressure in the intake pipe and on the other hand, subjected to a return spring or an organ that works as a function of the hotordrehpeople is;

by a single throttle device of the inflow of the additional gas (socket or slide), which operated by a sensor which is movably supported on a pin, which is two different

η 909807/0490

.Movements (two rotations, two translations, or a rotation and a translation), with a movement caused by the rotation of the Throttle valve of the carburetor and the other. By the action of the in the intake pipe behind the carburetor prevailing underpressure (or by an engine speed-dependent working organ) arises.

c) In connection or without connection with the Littein mentioned under a) and b) and always in order to obtain the most favorable composition of fuel and air, the effect on the possibly used variable throttling elements of the gas flow of air and fuel to improve the homogeneity - This fuel-air-fuel can be used, \ i ± e is indicated below. The jar organs are particularly effective in the case of large launches (at low negative pressures) and weak gas flows, so that excessive accumulation in these dangerous conditions is avoided.

i is .an ^v determine that the nittel a) Hegulierun ^ of the carburettor) almost never sufficient to provide a vollkom-

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to obtain a sufficient dosage, whatever the working conditions (speed and load), but that considerably more satisfactory results can be achieved if means a) and b) are combined and that means c) (variable additional air flow, In Depending on two variable quantities that characterize the working condition of the engine) is in principle alone sufficient to always obtain a perfect result (to a greater extent in connection with a) and b).

d) The homogeneity of the fuel-air mixture

* m

to improve, can according to the invention:

1. Additional air into the intake pipe behind the carburetor through approximately radial, regular on the circumference of the intake pipe existing openings are passed, whereby the additional air is preferably heated beforehand,

2. variable means for throttling the gas flow coming out of the carburettor (flaps, rotatable

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controller, socket) are used, which are automatically regulated so that the gas flow especially at low penetration and low underpressure, d. H, in the working conditions when the carburetor itself has poor atomization and a particularly delivers a heterogeneous mixture, is compressed,

5. The mixture is ^{homogenized simultaneously by the I 1} Jittel of the additional air and the Kittel of the variable throttle organs of the gas flow supplied to the Hotor.

e) To remove the crankcase gases normally released into the atmosphere, these can according to the invention of the intake line of the additional air are supplied so that they contribute to the heating of the mixture and burn with this mixture.

■ f) To prevent the oil from rising between the piston and Cylinders, which favors emptying through the escape of various hydrocarbons.

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you can avoid:

1, form a negative pressure in the crankcase of the engine by this with the intake line of the additional air, which flows into the intake pipe behind the carburetor, is put in connection, this negative pressure is preferably limited by the Inlet of the additional air to be mixed with the gas from the crankcase (with the help of a valve or another suitable device connected to an organ, the one in the suction tube prevailing negative pressure more or less proportional resistance litfert) is braked so that the Negative pressure in the crankcase s · B. 2/3 of the same Time in the suction pipe prevailing negative pressure, with a valve also preferably the gases from the crankcase in the event of excess pressure in the same into the outside air or into the air filter,

2. Create a variable throttling of the exhaust (e.g. at the end of the silencer), which is preferably controlled by a device with a counter-spring

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This device works as a function of the negative pressure prevailing in the intake pipe and cancels the throttling or its effect when the above-mentioned negative pressure is reduced completely or to a sufficiently small value _t

3t the devices described under 1. and 2. use at the same time.

g) To the escape of significant herigen of ΰβη-zindampf to prevent through the exhaust when throttling the engine, a control unit is arranged, that works in dependence on the prevailing negative pressure in the intake pipe and in the way in the sense of a opening movement responds that it is directly or preferentially with the interposition of a servo motor) z. B. vacuum servo motor) on the throttle valve of the carburetor or the stop that determines the minimum opening of the throttle valve acts.

h) To achieve the safest and most regular ignition possible with that of the other elements

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the dosage realized according to the invention, a second pin can be attached, according to this dosage, to the same bracket which performs _{two movements t caused by the throttle valve of the carburetor and the negative pressure to regulate the additional air.} This second pin can then actuate a second stylus, via which the ignition timing control or an improvement in the control of the ignition timing achieved by conventional means takes place in accordance with the particular aim pursued by the invention.

The invention is illustrated by way of example in the drawings and in more detail below described with reference to the drawings.

It is represented in:

a schematic view of the execution a carburetor equipped for easy application of the one described above is,

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147624a

- ■ 12 -

Fig. 2 is a schematic view of another embodiment; of the carburetor and in

! ■ 'ig. 3 an ecliematic representation of the heating the additional air.

i'ig. 4- shows the extraction of additional air from the Crankcase.

Figure 5 illustrates the mechanism for reopening the throttle of the carburetor.

Fig. 6 shows a perspective view of the entire device for fuel control of the engine in association with the carburetor.

In Fig. 1, the carburetor is shown in its main elements; Fuel nozzle 1, throttle valve 3. Behind the throttle valve 2, seen in the direction of flow, means for throttling A the mixture supply are provided in the mixing tube 3 of the engine. These funds exist

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e.g. from pivoting flaps,

The calibrated openings of the carburetor, main and Idle openings are for hedging the excess fuel to a lower value of 5 # or to eliminate the excess fuel.

In addition, an opening for the additional air is shown in FIG Arranged behind the throttle valve of the carburetor, seen in the direction of flow, which has a control mechanism 51 (e.g. socket, valve, slide) is provided, this regulating element being correlated with the movement of the throttle valve 2. That's the way it is 51 z. B, connected by a rod 11 to a lever 12, which is attached to the axis 9 of the throttle valve 2.

As shown in flg. 2, the control element 51 of the additional air flow, instead of simply being connected to the throttle valve 2 at SeIn _{1, can} also be actuated by the negative pressure prevailing behind the carburetor. Between the carburetor (through its air funnel 1 and its throttle

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aelklappe 2 shown) ¹ and the intake duct 3 of the engine is a tubular 8 piece 4 with holes 5 for the introduction of the. Additional air. The tubular piece 4 is connected to an air supply line 6, which is connected via a line 7 to the air filter of the hotor.

The line 7 is provided with a control element consisting of a slide valve 51 with a window 50. The slide is actuated by a cranked lever 52 articulated in 53, which is operated by the past pin 5 ^ · is moved, which is movably mounted on a preferably spherical pin 55.

The pin 55 is carried by a plate 56 in the form of a sector-shaped plate 56 which can be pivoted back and forth, wherein the axis of rotation 57 of the plate 56 on a perpendicular sliding guide 58 is mounted.

The movement of the guide 58 takes place via the with the Bellows 17 connected spindle 15i wherein the bellows 17 via line 18 to the

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deneator prevailing negative pressure is connected. the pivotable about the axis 57 and the pin 55 bearing Plate 5 ^ is on the other hand by the lever 59 and with the spindle I5 of the throttle valve 2 of the carburetor rigidly connected arm 62 is actuated.

So it can be seen that the actuation of the slide 5I is pending simultaneously from opening the throttle valve 2 and from the negative pressure prevailing behind the carburetor.

The additional air introduced through the openings 5 is preferably heated beforehand in order to facilitate the atomization of the remaining liquid fuel and also to compensate for the influence of the external conditions 1, especially the ambient temperature. This prior heating, the advanta- hafterveise on average a temperature of I50 ⁰ can reach, is preferably effected by the exhaust of the engine ·

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<6ad original

147624a

For this purpose, as in i'ig. 3, the inlet line 7 for the additional air through a line 63 connected to a sleeve 64- around the warm part of the exhaust duct is arranged and is open on at least one side.

It is advantageous to provide a further line 66 which is arranged on line 6.3 and which is released into the atmosphere or, better, opens into the air filter. The temperature of the air supplied in 7 is thus determined by the Mixing of the heated in the sleeve 64- and sucked through the line 63 warm and the through the Line 66 determined cold air sucked in, whereby one can be pivoted by 68, depending on the outside air This quantity regulation is effected by a thermostat controlled Hegel flap.

i'as the gas flowing through the inflow openings ^ and the line y, the inflow of which is regulated by the slide ^> Λ (! B'ig. 4-), can be partially or completely removed from the crankcase 7o (Fig. 4-), in order to reduce the rise of the oil and the hydrocarbon-rich vapors that are generated as a result of the pressure

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147624a

^! - 17 -

Difference between housing and cylinder to penetrate into the cylinder during the suction stroke of the engine try.

This removal of the additional gas from the housing 7o takes place through a line 71> which is preferably with a device is provided which limits the negative pressure in the housing 7o and which is an impairment the lubrication of the pistons of the engine avoids. This device consists of an intermediate the lines 71 and 7 arranged housing, which is provided with a valve that the housing 72 connects to the external pressure when the suction pressure falls below a predetermined value.

For this purpose the valve 73 is the one behind the carburetor The prevailing negative pressure is thereby subjected to the fact that its shaft 74 is actuated by a lever which can be rotated in 76 75 is actuated. The end 77 of the lever 75 is through actuates the sleeve 78 of a flexible cable 79 which on the one hand at a fixed point 8o, on the other hand at the iCnde 27 of the lever moved by the bellows 17 26 is attached.

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The negative pressure which tries to open the Vetil 73, Wurd through resistor balanced, which is opposed to it via the lever 75, in the moment when this negative pressure for a specific portion of the suction pipe behind <? Em carburetor prevailing negative pressure (. B . 2/3), the valve opens, while it remains closed until this value is reached.

In addition, a cover 81 is provided on the housing 72, the --wrkt as a vacuum valve and the • crankcase 70 with the atmosphere or your air filter inlet allowed to connect, but the flow of atmospheric air back into the Housing prevented.

On the other hand, a dewiring of the opening is of interest the throttle valve 2 df; s in the carburetor Trap where the negative pressure is behind this too. is well above the value that would occur in the event of sudden throttling, be especially in i'alle, when the lotor is driven through the day will, should normally be present.

9098C7 / CU90

Fig. 5 is part of the Tig. 6 showing an embodiment represents the device in which the reopening of the throttle valve by the over the line 18 in the bellows 17 is effected negative pressure.

At the end 27 of the lever 26, which forms the balance beam actuated by the bellows 17, there is a sliding shaft mounted, which is loaded by a spring 83 downwards.

This spring 83 w * b4 is provided with a preload, which is dimensioned so that it is sufficient in the event of sudden throttling to the shaft 82 downwards to press against a stop 84.

A slide Ö5> is supported on the lever 26 which has a recess 87 and slides in the cylinder 86. The cylinder 86 can with the help of the line 88 the Vacuum extraction line 18 with a bellows 9o forming a servo heater via a feed line associate. At the upper end of the cylinder 86 there is

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External pressure. The piston 85 is pushed down by the spring $ 2.

The upper part of the bellows 90 is connected to an angle lever 93 rotatably mounted in 94, the angle lever 93 being connected to a push rod 96 which is provided with an elongated recess 97. A bolt 98 connected to the lever 99 is mounted in the elongated recess 97. The lever 99 is rigidly connected to the axis of the throttle valve 2,

When the shaft 82 is in its lower position (as shown in FIG. 5), the negative pressure in the line 88 cannot get into the bellows 9o, since the connecting line 89 is blocked by the piston 85 and with the external pressure by the is connected to the free part of its opening lying above the piston 85.

At a vacuum that is strong enough to Gleitechaft by means of the bellows 17 and the lever 26 upon compression of the spring 83 upwardly

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H76248

To push, the piston 85 is also pushed up. Here, the recess 87 reaches the level of the connecting line 89 and connects the Bellows 9o with the negative pressure of the line 88. The bellows 9o contracts and causes via the angle lever 93 and the rod 96 open the throttle valve 2.

The elongated recess 97 is so long that the throttle valve of the carburetor can be fully opened with any compression of the bellows 9o is possible.

Sometimes also the coupling of the ignition with the device for regulation of the additional air through the slider 5I ^v n ° interest. For this purpose, the sector-shaped disc 6, which carries the pin 55 , is provided with a second pin of the same l'Orm, as is shown schematically in 'FIc 6 by 104. A trigger pin I05 is guided on this pin, the movements of which, flexibly or kinematically transmitted I06, cause a correction of the ignition timing (e.g. by turning the DELOO).

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147624a

The arrangement of the various devices described above can, as in i'ig. 6 shown on a plate 32 arranged between the carburetor .1-2 and intake pipe 3 of the engine.

In this plate is the cylindrical channel in 33 drilled, which receives a tubular piece 3 ^, which is provided with the inflow openings for the additional air is. This tubular piece 34- stands with a bore 1oo in connection, to which lie line 7 connects. The control slide is in the hole 1oo 51 mounted by lever 52 is operated.

The bellows 17 and 90 and are on the plate 32 the fasteners of the various elements of the mechanism are mounted, such as: part Ιοί that makes the rotatable Storage 53 carries, means 1o2 for guiding the sliding plate 50 »Holder 1o3 of the shaft 82 and its i-eder and the slide 85.

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U76248

It is noteworthy that this compact construction takes up very little space comfortably on an engine can be attached without having to change the motor. Of course it can do all of them Have variants of the embodiment.

- patent claims -

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Claims (4)

- "24- - Claims Λ.J Device for suppressing the toxic components occurring in the exhaust gases of an explosion engine with an additional air supply provided in the intake line of the engine and an additional device controlled by the throttle valve of the carburetor for regulating the air flow rate, characterized by a with the downstream of the The space connected to the throttle valve (2) of the carburetor and responding to the negative pressure prevailing therein (17)> which, on the one hand, together with the throttle valve control (59-61) by means of a double-movement cam disc (56) controls the device (5o) to regulate the additional air flow and on the other hand separately and independently of the ι
. Throttle valve control a control arrangement (96) to close the carburetor _{throttle valve (2)%} actuated and the opening of this throttle valve BATH 100807/0 ^ 90 pe causes when the negative pressure exceeds a specified value. 2. .Vorrichtung according to claim 1, characterized in that one of a cam disk (1ο4 ·) and a stylus (1o5) Control device for the pre-ignition of the engine when the throttle valve (2) is opened is provided. Device according to claim 1, characterized in that g e k θ η η ■ shows that when a predetermined value of the negative pressure actuated device for reopening the throttle valve consists of a piston (85) and a servomotor (9o) actuated by the negative pressure. 4. Apparatus according to claim 1, characterized in that the intake opening for the additional air is connected on the one hand to the crankcase (7o) of the engine and on the other hand to an air heater (6 ** -) which is freely connected to the atraosphere .