DE1751160A1 - Fuel system - Google Patents

Description

Esso Research and (Brit. 28565/67 - prio 21.6.67 Engineering Company Brit. 40970/67 - prio * .9.67

Elizabeth, NJ / V.St.A. 5 * 29) Hamburg, April 10, 1968 Fuel system >

The invention relates to fuel systems for internal combustion engines and in particular, liquid fuel systems for engines that run on a combustible mixture of fuel and Oxidizing agents are operated.

To achieve a relatively homogeneous fuel oxidation medium oil it is advantageous in many cases if the liquid fuel is relatively volatile. By burning of the fuel-oxidant mixture when the engine is working, heat is generated, which the lighter Bestadd parts of the fuel evaporated. When the engine is then stopped after a selected runtime, the fuel close to the engine continues to heat up and evaporated, so that the evaporated fuel can be drained mufi, na to prevent a pressure increase in the fuel system.

In the case of motor vehicle engines with Benxin-Luft-Oeeisohen

are operated, the engine is switched off '

BATH ORIGINAL

109820/0631

de «Carburetor housing base, gasoline evaporated from the Carburetor delivered to the Ataoephlre. In some lfinders there are prepared Oeaetse or Oeaetsea templates for limitation the on dleae catfish from dm Vergaaer in the AtaosphMre Bensinaengen · In addition, were in various Also obstacles already adopted or submitted to Oesetse, welohe of construction fuel tanks of motor vehicles Sinking amounts of petrol delivered to the Ataosphlre In the latter case, the bensin losses by the tenper & airuntersohlede of the day and the warewarning of the tank Driving the motor vehicle is conditional.

The present invention is now based on the object of providing a fuel system with the lowest possible loss of exhaust gas Propose fuel from the systea or the engine.

This task is invented by a fuel jet for combustion engines gelOat, which is a fuel reactor, a Nlsohkanal old a Mlaohsone, in which at running engine the fuel old an oxidizer (like air) is combined into a combustible oeniao »that duroh the canal sun Motor atrönt, an Abeorptlonsaittelkörper do reversible absorption of the de »Beservoir

109820/0531 »* °

evaporated fuel, a first formation between The reservoir and the absorbent body are a great deal Connection between the absorption medium body and the Nisoh Canal above the mixing zone and a third connection as well as the absorbent body and the oxidizing agent at practically full static pressure of the oxidant includes.

Under "absorption" In the present description both the physical absorption is ala me is the appearance physikoohemleehe understood adsorption. "Reversible absorption" is understood to mean that the absorption can be made rttokgHnglg.

When the oxidant flows through the Miechkaial In order to reduce his pressure on the Druok learn Reservoir and in the central absorptive body. Through this becomes oxidizing agent from the third compound through the Absorption body sucked into the Miechkanal and desorbed Fuel carried through the second connection into the KLsohkanal ..

When the fuel vapors denser ala daa oxidant the first connection is preferably one

BATH ORIGINAL

109820/0531

first line «whose one end at or η Ae M upper lad · de · Absorption old bodies aUndet, rod the »ride Connection from a second line »derei ein ·· end Wed or nabe aa lower end · of the absorption curve * · ntindet » nobel dft · called · end of the first line «wlsohen the named end of the line in dispute and the third connection. This arrangement ensures that the fuel supplies dl · first connection at or nin · as upper sod of the absorption · «leave the body» fall into it and be absorbed. During the ^ sorption strOat The ooqrdation key by the third door provided a connection near the bottom and desorbs fuel from the top Part of the · Absorptlonsalttelkerpere »so that the upper part relatively free of fuel 1st and at Naihlasaen or Auf · Auras of the Ojqrdatlonsalttelrtrones further from the first Compound can accommodate escaping fuel.

If the fuel tank consists of a combustion engine from the carburetor, it enables the arrangement of one charge, the first connection aa or: almost at the upper base of the absorbent body, so that the oxidation duct lets all-in-one air practically without the back-drop caused by the absorbent gasoline body β-ate line old dea carburetor gate is in connection. D: β Mode of operation • Ine · XQr dl · Use in a known fuel system · «

remains without absorption device provided carburetor that is, when installed in a fuel system according to the present invention Invention practically unchanged.

The wide line preferably points one practically to us Height of the upper end of the absorbent body upwards running part. This part of the second conduit has the effect of an upwardly extending leg of a U-Rohrea, the other leg of which is through the absorption medium is formed. Heavy fuel vapors are held in this U-tube as a level of their level is essentially no higher than the top of the absorption middle body. This increases the chance that the Fuel sumps are absorbed by absorbent.

The central body of the absorption can be placed in a container. find and "the third connection can be through an opening of this container.

In one embodiment, the fuel system according to the invention If a valve is arranged in the first connection, which when a predetermined druoke is exceeded in Mleohkanal provides a way for fuel that has evaporated in the reservoir sum absorbent body releases and when falling below the predetermined druoke in the sheet metal channel this path

109820/0531 ■ »<* ■ *«.

roared and a direct route fttr evaporated fuel from the reservoir in the Msoh Canal above the Kcheone releases. The sheet metal duct can be regulated in the throttle device The fuel Ooqrdationes) lttel <»8troB» s sum engine be provided and the valve can depending on Druok work below the throttle device.

Can otoren when using the system for erflndungsgeaB6en Kraftfahrseug- ■ the reservoir either au · of) VergasergehJtus "- uut rtell or the fuel tank or of both.

The invention will be described in the following on the basis of some embodiments described in connection with the attached drawings » However, they are not worried about them Figure 1 - a fuel system of the invention for KreftfahrtseugBotoren sd.t carburetor in sohsaatlsoher representation,

Figure 2 - a detail from Figure 1 in a larger scale table »Figure y - another embodiment of the part shown in Figure 1,

Figure 4 - another execution phone of the invention device Fuel system).

The Kreftstoffaysten 10 shown in Figure 1 uafalt a

109820/0531

air filter 11 of known type, a Mlsohkanel 12, in which with the »engine running (not shown) air through the Filter 11 is sucked, a carburetor 13 with an Al «Bensinreservolr Serving housing base 14 and one or more nozzles 15 "which establish a connection between the carburettor and a narrow Kisohsone 16 in Kisohkanal 12 * put «The fuel will carburetor 1? by a Punpe If Sugeftthrt from a main tank or reservoir 17 and the fuel level in the gasifier housing base 14 is with a well-known Ventll Sohwinner Meohanl snus (not shown) complied

The static pressure falls due to the air flow in Misoh duct 12 in channel 12 compared to the pressure in carburetor 15 and it will Bensin through the DUse (s) 1 $ into zone 16 of channel 12 * sucked where it sows air * and unites a flammable Oemieoh will. The combustible Oenisch flows durota a pipe 19 sun engine »being its quantity through a throttle valve 41 above the line 19 is regulated.

The fuel system 10 still unfits an open container or canister 20 containing a bed 21 of granular activated carbon. In the top part of the bed just below its surface is a perforated tube 22, which one about a pipe 2? with the upper part of the carburetor

10 9 8 2 0/0531 sad

connected let.

When the 6-series carburetor 1> ο heals that it contains «» · gas evaporates, the gas ends through the hole 23 and the perforated pipe 22 at the top of the bed 21. Since the beniind biifo are much heavier than air » they fall au · de 'Bohr 22 down duroh the carbon bed 2I ₉ where ale arrested and "Reduces be partially absorbed. In general, no bowls are also perforated. Bohr 22 neon rise above, but above Bohr 22 nooh a thin coal sole is arranged "ao that under high working conditions, beneath the ascending working conditions, benigns may be prevented from escaping and are absorbed in this thin rail or deflected downwards. In general, when the heat is absorbed, a considerable amount of benzine has been evaporated for about 50 minutes after the engine has been switched off.

The arrangement of the perforated hole at or near the surface of the bed 21 ensures an economic recess sung the bed through the falling Olapfe · Continuing will it duroh the arrangement of the perforated drill «22 la uppermost «Part of the Xbhlebettce 21 was glowing so that air could flow through the open air ! «Upper part of the container 20 unhindered through the drill 23

20/0531

and the perforated pipe 22 in the carburetor 13 sucked stoves can; as a result, the carburetor needs 1> for installation not particularly in the fuel system according to the invention to be designed «because pressure changes in the carburetor are exactly the same can take place unhindered as in the absence of the container 20 and the connecting pipes 22 and 22.

The lower band of the container 20 is with the air filter 11 through which a pipe 24 is connected which extends from the bottom of the container 20 at least to the top edge of the container 20 before it runs in the direction of the air filter 11 · When the engine is running, the drop in air pressure in the air filter 11 acts at the lower end of the container 20 and sees air through the carbon bed through the opening in the upper part of the container 20 21 near the bottom. The air lifts the absorptlon gross weight Look for coal and benches in bed 21 so that the vapors are desorbed and cannot be removed from the air. The air with the petrol pots passes through the line 24 into the air filter 11 and from there through the Klsohkanal 12 sun Motor · Because the tube 24 runs from the bottom of the container 20 to about the top edge of the container 20, these are effective Bohr 24 and the container 20 like the handle of a U-tube «·» so that * from the perforated tube 22 into the container 20 vapors sun gruiten part held in container 20

109820/0531

and not by their own strength neon from the top of the container 20 or through the pipe 24 can escape. On these catfish the chenoe is enlarged, the benches from coal bed 21 must be completed.

The degree of desorption of the pots from the bed 21 depends on the speed of the air flow through the container 20, which depends on the pressure drop and the speed of the air flow through the air filter 11. The air flow through the filter 11 is greatest when accelerating or at high speed of the engine, and it is assumed that the amount of desorbed fuel entering the engine from the air filter 11 under these conditions is in proportion to sun fuel from the nozzle, for example. The DQsen 15 is so earing that no negative changes in the hydrocarbon or carbon monoxide content of the engine exhaust gases occur. The air passing through the container 20, the bed 21 and the pipe 24 sun air filter does not significantly change the amount of air otherwise sucked in by the engine.

When the motor has cooled down at low speed b is driven, the flowing through the container 20 can Air sunchcts considerable quantities of benign, which

100820/0531 ^ _1MAI

BATH ORIGINAL

- Ii -

then make up a substantial proportion of the air-steam flow reaching the air filter 11 »Un an essential Change in the supply line of the line 19 Avoiding combustible oils «can be found in Bohr 24 a calibrated constriction 25 can be provided "which the Air filter 11 is limited in flow rate.

The fuel eye tee 10 further comprises a pipe 26 'which connects the air space of the fuel tank 17 with a perforated pipe 27 arranged next to the perforated pipe 22 on or just below the surface of the bed 21. The deodorant 28 which closes the filling pipe 29 of the tank 17 does not have the usual ventilation. In tank 17 resulting vapors pass through the pipe 26 and the perforated tube 27 into the bed 2I ₉ where they retained and zumiMe * t be partially absorbed. The desorption of the steam takes place in the same way as it was described above in relation to the steam from the carburetor 15 *

An extension 47 is provided in the line 26 prevents the liquid gasoline from the tank 17 la the container 20 arrives. Without this extension, flttealges Benein duroh syringes in the tank get into the tube 26 or due to temperature-related expansion of D-heads in the tank 17 in

* '*> ORIGINAL

109820/0531

line 26 printed «ground» especially when the tank 27 full 1st and sieve the Pabrxeug old de »fuel system a «put bang is»

FQr Krsftfahrseuge European manufacture old a Hubrau » In the Orese order of 1500 ea? outside of the container 20 soles «Ice to su approx. 8 g BsnttndHapfs per cooling period and up to Take up about 20 g of BenslndXspfe per day from tank 17

The structure of the absorptian storage tank 20 1st la individual shown in FIG. The perforated tubes 22 and 27 can have any shape, for example that of a ring or a spiral. Bine is well suited fora, apart from that Perforation, such as that of a Bourdon Brueknesser * and the Tubes 22 and 27 can be concentric in the same plane to be ordered. In the case of tested forms of execution of the balloon 20 the perforated pipe 27 of the fuel tank was arranged so that it was the perforated pipe 22 of the carburetor surrounded.

The bed 21 consists of about 700 g coconut charcoal on a « Sieve 31 made of inert "fine-meshed" textile material, which on a plate-shaped Metslldrahtsleb 32 rests. The upper * Rarely of the bed 21 is in the same catfish from a sieve 33

109820/0531 BAD OAtG (NAL

«From fine-meshed textile material 81 ·) »34« us thin »metal wire through one under the upper part of the container * held «elastic metal screen pairing 35 pressed 1st «Through the print of pack 35 there is movement the grains of coal in bed 81 prevent the friction from being as low as possible.

The drill 84 is made of plastic reinforced with KylonfMden.

Another embodiment of the absorption bag holds a 20 1st shown in Figure 3. This · differs from the The form described above by the fact that the upward Part of the tube 24 extends inside the container 20 instead of outside it. The upward part of the Bohr ·· 24 can be an integral part. of the container » be.

Zn Figure 4 is «in fuel system 100 gexe, which in the The structure is essentially exactly the same as the system 10 in FIG. 1, except that there is no pressure compensation valve 37 in the pipe 23 contains. The valve 37 contains a piston 38 »which through it a spring 39 near the left (in FIG. 4) is printed. The piston 38 moves against the spring 39 when the Druok is at his

10 98 2 0/0531 * ^AD

eelte (in figure 4) is changed bin tube 40 This transfers the pressure in the line 19 to be driven below a throttle valve 41 to the right apply de · piston «38 · venn aleo in line 19« in lower Pressure applied as if the engine was running, the piston 38 naeh reohts moved. On the left side of the piston 38 there is a Ventllkurper 42 attached, which moves in a Ksjsaer 43 » the upper a pipe 44 old de Nlsohkanal 12 above the Wk; · (N) 15 in communication. Blank perforated plate 45 1 «valve 37 ensures a connection between the left and the right Veil of the tube 23 on both sides of the valve 37 "

When the piston 38 is located aa furthest toe, it closes the valve body 42 the inlet to pipe 44 and all in carburetor 13 formed Dsnpfe pass through the opening in the plate 49 through the tube 23 into the container 20, where it suf the above described catfish are held and absorbed. These Mapfe know then later in the same catfish as with the In The execution form shown in FIG. 1 must be desorbed.

Venn the pressure in line 19 by running the engine ▼ is determined, the piston 38 moves to the right, whereby the valve body 42 slides the opening in the FUtU 49, so that all dispensers from the carburettor are above the left

109820/0531 _B AD

Place the tubes * 23 through the chamber 43 and the tube 44 into the Mixing channel 18 are drawn * from where they enter the engine. When the engine is running, 13 are produced in the carburetor Damp «directly into the motor and not first into the container 20 sucked. When the engine is not running, the vapors are emitted in the same way as in the embodiment shown in FIG the container 20 sucked.

Some European motor factory engines are ventilated with carburetor provided «which are connected to the Mlsoh Canal so that vapors are created in the carburettor when the engine is running get into the mixing channel. In the case of the one shown in FIG Embodiment is also such a carburetor valve present (which is the left part of the pipe 23 and the pipe corresponds), so that this type of carburettor is the one according to the invention Fuel system can be used without the intended one To significantly influence the working cycle of the carburetor.

In this embodiment, as in the case of the one shown in FIG. An extension 47 is provided in the vapor pipe 26 extending from the fuel tank 17 in order to reduce the risk reduce liquid fuel from entering the container 20 arrives and the coal bed 21 saturates.

As an absorbent for the system according to the invention

109820/0531

Kokoaukohle mentioned above, but can instead decaen you other absorption eads like for example Charcoal or peat charcoal or clover gel are used

The individual parts and features described above can be found in different combinations can be used «without that 8 / ste «deviates from the invention.

^s 1 0 9 8 2 0/0 5 3 1

Claims (12)

Esso Research and (Brit, 28563/67 - prio 21.6.67 Engineering Company Brit. 40970/67 - prio 7 * 9 * 67 Elizabeth. N.J./V.St.A. 5 * 29) Hamburg, April 10, 1968 patent claims 1. Fuel system for internal combustion engines with a fuel reservoir, a Mlschkanal with a niche zone in which, when the engine is running, the fuel is mixed with an oxidizing agent (such as air) to form a combustible mixture that flows through the channel to the engine, and a Absorbent body for the reversible absorption of fuel evaporated from the reservoir, characterized by a first connection (2j5, 26) between the reservoir (14, 17) and the absorbent body (21), a second connection (24) between the absorbent body (21) and the Misoh channel (12) above the mixing zone (16) and a third connection between the absorbent body (21) and the oxidizing agent at practically full static pressure of the oxidizing agent. 2. System naoh Anepruoh 1, characterized in that the first connection consists of a first line (23), one end (22) at or near the top of the 109820/0531 4f Αϊ - Absorptlonsnlttelkurpers (21) opens into the second connection consists of a second line (24), one end of which is at or near the lower end of the absorption body opens, and that one end (22) of the first line (2 ^) between said end of the second line (24) and the third connection. 3 · systems according to claims 1 and 2, characterized in that » that the second line (24) is practically up to the height the upper end of the Abeorptionemlttelkörpers (21) extending Part has 4. Syaten according to claims 1 to 3 «daduroh characterized, that the absorption device (21) in a container (20) housed 1st and the third connection by one Opening of the container (20) is formed. 5. Systen naoh claims 1 to 4, characterized by » that one end (22) of the first line (23) sus one perforated pipe. 6. Systen naoh claims 1 to 5, characterized by that the reservoir is ordered from a fuel tank (17). 109820/0531 • -5- 7 · System according to claims 1 to 5 »characterized in that the first connection (22) contains a valve (37), which, when a predetermined pressure is exceeded in the niche channel (12), opens the way for the reservoir (17 * 1?) Evaporated fuel to the absorbent body (21) releases and when the pressure falls below the predetermined pressure in the niche channel (12) interrupts this path and a direct path for fuel evaporated in the reservoir (17 * 1?} to the mixing channel (12) releases. 8. System according to claims 1 and 7, characterized in that the reservoir consists of the lower housing part (14) of a fuel carburetor (13). 9 system according to claims 6 and 8, characterized in that that the fuel tank (17) and the housing base (14) of the carburetor (15) have separate first connections (23 »26) connected to the absorbent body (21) are. 10 system according to claims 6 and 9, thereby knowing ei without t, dsJ In the first connection (26) between the fuel tank (17) and the absorbent body (21) an extension (47) is provided. “AD y> 9820/0531 eat 11. System according to claims 6, 9 and 10, characterized in that that the fuel tank (17) with a filling opening (29) and a lid (28) for sealing the filling opening is provided. 12. System according to claims 1 to 11, characterized in that that the second connection (24) the absorbent body (21) with an air filter (11) or air cleaner above the mixing zone (l6j connects. hb: na 109820/0531 ^BA!> Blank page