DE1526728A1 - Fuel injection and ignition systems for internal combustion engines - Google Patents

Description

Dipl-Ing. F.Weickmann, Dr. Ing.A.Weickmann, Dipl.-Ing. H.Weickmann Dipl.-Phys. Dr.K.Fincke patent attorneys

8 MÜNCHEN 27, MtUlLSTRASSE 22, PHONE NUMBER. «13921/22

PHYSICS INTERNATIONAL COMPANY 2700 Merced Street, San Leandro, California 94577, U.S.A

Fuel injection and ignition system for internal combustion engines

The invention relates to fuel injection and ignition systems for internal combustion engines · It is known that the mode of operation and economy of one with a fuel injection system provided internal combustion engine is considerably larger than for one equipped with a conventional carburetor Engine, with a further advantage of having a fuel injection system provided engine, the significantly reduced exhaust emissions are added. One of the reasons one large scale use of fuel injection systems for engines are their high production and maintenance costs. The fuel injection systems

- 2 ORIGINAL BATHROOMS 909885/0459

152G728

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are ncrmalervjel se very complicated and ;: orfc.rdem an exact setting and setting.

if. In the present invention there is Ir- der -chaffun £ of a fuel spray system, dnc Ir, eir.f ^; .choi * , -leist can be produced and only requires a small '.'art ^ n ^.

“A further task of the previous ones. ^ rf tr.d ri £ lot e? » Ic ο in relatively only slightly aufviendigos Kraf tstcff " nzpr Ltzaystem to create.

The other task of invention is dc.rir :, el η insensitive and essentially worthless fuel injection system. to create.

Line further _: aif £ abe the invention there is Ir. the creation of a fuel injection system with an infinitely variable fuel delivery per stroke, an infinitely variable adjustment of the ignition point, the injection rate and the injection pressure, the change of which is controlled independently of one another and in an exact manner by low-cost electrical networks.

Comprising the invention Hegt further the object to provide a & raf tstoffeinsprltzsystem as opposed to a mechanically driven system a much larger area, within which the fuel delivery

909805/0450 - fAD ORIGINAL

per hub LL-idorbur is and where be "'this ^ idorbur over the whole The area where the motor period can be precisely and quickly controlled.

Another object of the invention is to provide a crude fuel injection system that has multiple injections made possible, so that a variable number of fuel injections can be used to achieve a fuel operation that is suitable for numerous engines per motor bead every exactly and continuously can be controlled

Finally, another - ASK of the invention in the manufacture of a ^Xt raf tstof f einspri tzpumpe whose desired Fcn.ili'r'e (identification data) corresponding to that as in the übl.i before;., Sehraubennutf "örmi gen , "olb ^ nf.worn ZyIi nderlrraf tstoff oi ncpri tspiunpen given lsi,

To achieve this and other objects of the invention, the invention proposes the use of a solid body made of piezoelectric, ceramic material as an active Bmpenelement, which in controllable, more precise: ric more effective '..' iron electrical - ■ nerg ".e convert directly into liquid pressure can. That. '. "inspritssystrr. has a piezoelectric pump which can only be easily controlled over extremely large areas and is designed in such a way that it simultaneously creates a pump for igniting the injected. Fuel serving Z ' ν- id spark en ε is suitable. The invention provides a liquid container to which liquid is fed via a one-way shut-off valve, which in turn is fed through a

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Exhaust valve is ejectable, which brings in the position £ € let,

it

in which / is suitable for ejecting liquid »The piezoelectric Material is used to compress the liquid in the liquid container, to control the injected Amount of fuel per stroke and to supplement the amount of fuel expelled through the exhaust valve

Further details of the invention can be found in the following description of the figures and the claims.

FIG · 1 shows a schematic representation of a "embodiment of the subject matter of the invention _t is disposed over the cylinder of an internal combustion engine."

Fig. 2 shows a fuel injection system according to the invention in cut representation.

Fig. 3 shows another embodiment of the subject according to the invention in longitudinal section

FIG. H shows an injection nozzle used for an arrangement according to FIG. 3 in longitudinal section.

Fig. 5 also shows in longitudinal section a fuel injection system, which is modified in such a way that it can be used as a distributor pump according to the invention

BAD ORfQfNAL

A combustion chamber 10 shown in FIG · 1 an internal combustion engine ewiww has a reversibly displaceable piston 12 · At the upper Lnde the combustion chamber 10 is arranged I ¹ + a in the present invention formed Kraftstoffeincpritzsystem, which injects fuel into the interior of the combustion chamber 10 degrees. The injection system lU is connected by a pipe 16 to a fuel tank not shown in the drawing. A piezoelectric ceramic material, which requires an electrical voltage pulse for its operation, is used as the injection system of the invention. For this purpose, an electrical line 17 leads from the injection system 1h to a voltage distributor 18, which essentially corresponds to the ignition voltage distributor of a conventional internal combustion engine. The embodiment shown in the drawing shows the use of the injection system according to the invention for engines such as diesel engines, although this injection system can also be used for engines with spark plugs, ie for Otto engines. For this purpose, the arrangement according to the invention is modified accordingly in its upper area so that it can also be used as a spark plug. In those cases in which the arrangement according to the invention is to be designed as a spark plug and fuel injection system, an additional electrical line 20 is provided which connects an ignition voltage divider 22 of the engine to the fuel injection system lh .

Fig. 2 shows in longitudinal section an embodiment of the. Article according to the invention · This has a with a

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Thread verseher.-is cylindrical housing 2 ¹ * which can be screwed to the usual injection pump or spark plug opening, nor to the combustion chamber » In the area of the hlc-rz ¹ * opposite of the cylindrical housing 7: k there is a disc-shaped cap 27 "whose" insertion into the housing takes place after the completion of the assembly of the elements located in the interior. The housing has a large cylindrical bore, which extends along the predominant area of the G-Jhii.is and tapers Lr: narrowed, lower housing area to a narrow cylindrical opening. In the bore of the housing 2 ¹ + eyie axially aligned piezoelectric disks 30 are stacked. The stack is arranged in such a way that alternately adjacent end faces of the panes each form high-voltage electrodes designed as layers and ground electrodes designed as layers be connected to the high-voltage electrodes through these openings. In line 19 connects the ground lector with the housing walls. The housing is earthed via the electrically conductive walls of the motor. The piezoelectric disks 30 are polarized in such a way that when a voltage is applied between their upper and lower end faces, they move in the axial direction. Its fuel line 16 is screwed to the cap 17. One end of the fuel line 16 adjoins a porous metal filter 3 ¹ +, which is located in the space between the stack of piezoelectric disks

909 8 85/0459

ORIGINAL BATHROOM

3 ^ and the cap 27 · A rubber sleeve 32 can be pushed onto the stack of piezoelectric disks 30 · The outer diameter of the rubber sleeve 32 and the inner diameter of the housing 2k are chosen so that an annular space 3 & is formed in which the through the porous metal filter 3k can get flowing fuel · The porous metal filter 3k is connected to the cap 27 and the rubber sleeve 32, which connects the discs 3t ^x with the porous metal filter 3k · With its lower end is the stack of piezoelectric discs 30 with a · movable piston 38. This piston will always be displaced in the housing longitudinal direction "as the stack dehtn of piezoelectric discs 30 and responsive to an applied ele ^v tric voltage signal. The piston 38 has a passage kC) which connects the circular bar 36 with an inlet shut-off valve k2 . With its circular peripheral surfaces of the piston is connected via a resilient ring kk _t which is preferably made of polyurethane, connected to the adjacent side car of the housing 2k · The elastic ring kk is not intended to provide a resilient mounting for the calving 38 'but also to the sealing against a fuel tank ^ 6, which is formed in the narrowed lower region of the housing 2k . In this housing area a cylindrical insulator ^ 8 is also inserted, which serves as a holder for a pipe valve arrangement k ^ Q. This disorder is provided with a pipe valve housing 52 and a valve Jk which is closed under the action of a spring.

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The one end of the valve Jk is somewhat extended outwards,
so that the valve open at its low-pressure or in the ^u as a spray orifice acts · The outer corners 52A of the Rohrvontilgehüuses 52 pointed to run and are adjacent with 26A designated corners of the housing 2k, so that when a geeignetei electric voltage between these corners sparking can occur. The voltage required to generate a spark between the earthed plugs 26A and the plugs 52A is supplied via the electrical line 20, which extends through the annular cylindrical space 3 &, which acts as a pump chamber, and leads to the tubular valve housing 52 ^ walls of the valve can century for the atomization of the fuel serving "3eim Batrieb the arrangement reaches the fuel which can be set, for example, by a conventional fuel pump under pressure, micro-porous filter through the dense 2> k
(which can be made of sintered metal or ceramics, for example
can) in the annular cylindrical space 36. One to the stack
Electrical voltage applied from piezoelectric disks 30 generates an elongation of the in the longitudinal direction of the stack
Disks through which the piston 38 is pushed downwards. Under the effect of this piston movement, additional fuel is conveyed into the annular cylindrical space 36. When the applied electrical voltage is switched off, a
Contraction of the stack of piezoelectric disks 30, causing the fuel to flow through the inlet shut-off valve h2 in
the fuel tank k6 is conveyed. When the fuel tank is full, the inlet valve k2 closes and blocks the further admission of fuel. When you create

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electrical voltage to the piezoelectric disks 30 the piston 38 is moved downwards and thereby the

· raftstoff displaced in the container k6 and pressurized This satisfy Raftstoffdruck "around the pipe valve to open and cause the% Kraftstofflufl through the injection nozzle, wcdurch a dusting of the fuel occurs. The voltage applied from piezoelectric disks 30 pushes the piston upwards and then a sufficient pressure drop is achieved in the fuel, which leads to the closing of the pipe valve JQ and the opening of the inlet valve ^ 2 and thus to the further supply of fuel. This piston stroke curve corresponds to that of a conventional piston power injection pump with a large bore and short stroke, which has a precisely controlled, variable stroke and rapid pressure relief.The fuel injected by the piezoelectric injection pump is precisely measured, precisely compressed and injected with a controlled flow rate and a controlled ignition point, with all Functions can be changed over an extremely large range When using several voltage pulses per engine period, several separate fuel injections can be carried out, which lead to improved control of fuel mixing, ignition combustion and the degree of combustion in spark ignition, compression ignition and coated charging engines (stratified charge engines) Furthermore, this piezoelectric fuel injection system enables finer, more careful atomization when a voltage pulse is applied, the rise of which is the re-

909885/0 * 50 - lo -

The resonance frequency of the stack of piezoelectric disks is spawned. This frequency generates ultrasonic vibrations in the injected fuel flow which support the opening of the nozzle and the fuel atomization a mine? .dnplitude having »! Ultrasonic waves regulated. A separate voltage pulse is fed into the electrical Loitu-.g 20 This line is coupled to the high-voltage electrode of the spark gap formed between the -Timto 2Ck of the housing 2h and the edge 52a of the valve Spark discharge occurring in the gap, which ignites the fuel mixture present in the area of this gap. D -.- The electrical insulator U8 prevents voltage flashover occurring during the sparkover and also acts as a thermal - "- solatcr for the fuel injection and pump chamber has a slightly inwardly inclined seat, the downward movement of the pump piston is loaded by thrust. This somewhat conical shaped seat reinforces the degree of seal by creating a low pressure load. The combination of the complete connection of this seal with the piston and with the neighboring one Housing surface and the lack of a sealing pressure, which is caused by the properties of the polyurethane and the geometry of the seal together with the shear stress determined by investigations, inevitably leads to a

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leak-free seal with an extremely long, non-twisting seal Lifespan·.

3 shows, in longitudinal section, a further exemplary embodiment of a fuel injection pump according to the invention. Here, a cylinder made of piezoelectric material is arranged in a cylindrical housing 60. This cylinder extends almost over the entire length of the housing 6u. The outer circumferential surface of this *. · 4ä-i ⁿ ~ ^ers is enveloped by a sleeve 6h , which is called a so-called. "Full compression sleeve" and an electrical insulator, for example with fiberglass, "wipe the outer circumferential surface of this sleeve and the inner surface of the cylindrical housing 6o. An outer annular cylindrical space 66 is formed filled with a core 68 which restricts the liquid: ions in the ring-cylindrical space 66. Between the inner surface of the i''orn 63 and the inner circumferential surface of the piezoelectric cylinder 62 there is an inner circular-cylindrical space 7u. This room serves as a purapen room-r

One of the front sides of the housing is closed by a cap 7 ^. This cap has a central part 73 with an opening 7 ¹ + ενί "provided with a thread which is screwed into the fuel line 16. The opening 7 ¹ + is connected to a passage via a filter 76 arranged in the core 68. The fuel passes through this filter to two passages 78 and 80, respectively. The passage 73 is

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partly formed between the cap 72 and the core 68 and partly as a channel 78A in the cap 72 and leads to the ring rim. At the bottom of the core 68, the shut-off valve assembly 82 is provided. This arrangement has a housing 8 * + in the interior of which a shut-off valve 96 is arranged, which is provided with a passage 88 connected to the passage 8u. ■ I-in passage 90 indicated by dashed lines in the drawing connects the shut-off valve with a passage 92. Diecer passage is formed between the shut-off valve housing 82 and a bottom cap 9 ^. The bottom cap 9h has two parts. One part 9 ^ A closes off the opening space 66 and adjoins the core 68. The other part 9 ^ hB adjoins one end face of the core 68 and has passages suitable for the flow of fuel. This part 9 * + B, referred to as the bottom cap part, has walls 96 which engage in the core 68 and a recess enclose, which serves to .aufnahme the lock valve housing 82. The passage 92 arranged in the cap part 9 * + B is connected to a passage 98 formed in the core 68, which leads to the annular cylindrical pump chamber 70. At its other end the passage 92 is connected to a passage IGO which is arranged in the cap part 9k and which, according to FIG. K, is in a fuel-permeable connection with the container part of an injection nozzle 102. The injection nozzle 102 is connected to the cap part $ k and has a plurality of perforations l ^u k arranged in a bullet-shaped cheese. The annular cylindrical space 66 is veiv bound by a passage I06 with a passage I08. The passage 108 extends as shown below

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shown in FIG. h , into the interior of the injection nozzle. These passages are used to ventilate the valve Iv?., The piezoelectric cylinder shown in FIG -ixparision or Kentraction of the cylinder causes. The outer circumferential surface of the cylinder, which the Hochspannungsele ': forming trode "is connected to an electric line 110, which according to the line 17 by i ^r ig. 2 is coupled with the voltage regulator. The inner circumferential surface of the cylinder, which is normally covered with a metal layer, is earthed by a line 7 ^. A ceramic, polarized on its circumference, can serve as a piezoelectric cylinder, which has segment-like electrodes.

Fig. H shows (a longitudinal section through the injection nozzle 2q2 · This nozzle has a tubular housing 112, the lower end of which is conical and provided with radially outwardly directed openings. The interior of the housing 112 is hollow and contains a for holding the nozzle serving element II ¹ +, which is eingeapßt in the housing and forms a ring cylindrical space IL6 with its outer peripheral surface and the Innenumfangsflaehe of the housing. ^D as element Ilk carries at its lower end a Düseneinrihtung 118 · This nozzle assembly includes a support 120 having a by downwardly directed shaft 12 ¹ U A bullet-like formed element 126 is slidably arranged and acts under

909885/0458 ORIGINAL BATHROOM

the action of a spring 128 which pushes the shaft downwards. I. 'normally slept <ν ;, l'.r.i'-rt 126 under ό · η · ./effect of the r-der dir-Durchtjv ^ c ;. ^ :. _L : -. Y \ LJt;

The one shown in Fig _{. 3, in the Kappoatr;} : l 3 U ar ^ yori; . "T"; Lorch IaI Ιύδ communicates with a in the i-th ^ loment LLU Fir.gr.crdn passage 13c in connection and engages by c ^ n .c _\:; or the 12 ^ in ·].. 5ehe.ft 12h in de.i area between de.-i rohrf- "m! G & n Teiori and the LIenont 126. J in in Fig. 3 ri t loL be ^ ei chi ^ t ^ r li - .; rch · laß is connected to a Lurchl & I 13 '"-, the yl -crr ^ T. nit derri kroisring-cylindrical passage Ho In '.'.- rolixd ^ ng "at-? h-tr. -; üemäfl Fiji U the passage II6 leads to eir.em / L ^ nLi oh vor-: larger I urchlaQ 13 ¹ U der which is adjacent to the so-called au3geblldr-f, r _:. · _.nde dos - !, htiuses 120. Lie passage :: o; c, I32, 116 and 13lt form the fuel tank di.ac-r 86 and a /, injection nozzle 113 on v; e is.

If the injection pump works according to Fig. 3, it is followed: The fuel is compressed by a fuel pump! Fuel first comes out of the fuel line ir. The filter From this filter, the fuel is conveyed through its corresponding passages into the circular cylindrical space 66, '' after which it passes into the interior of the Clements 126 and this exposes the Kraftstofftransportdurck. the fuel flows further through the passage 30 and the check valve 86 is 13 ¹ I. Upon expansion of the piezoelectric cylinder in the adjacent end of the bullet-like space 126

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Fuel sucked in. When the pump chamber is filled with taffeta, the pressure equalization between the pump chamber and the fuel line causes the r.inlaßabsperrventils 86 to open. When the piezoelectric cylinder contracts, this causes the pressure of the fuel in the pump chamber 7C to rise, after which this pressure rises The fuel of the space 13 ^ is transferred and has the effect that the bullet-like fitting is displaced upwards against the action of the spring 128. At this point in time, the fuel is injected through the openings in the cylinder of the internal combustion engine Radially distributed inside the combustion chamber, thus ensuring that it is not only located in certain areas of the combustion chamber, but also fills the entire combustion chamber ert and thus the chic Kögii it created that the openings or Lurch !: bills I "are" 128 rapidly and liquid were to decide under the v.'irkuiig the spring for avoiding a ^ pringens of Venti lsitzens during the! closing of the valve one is used with lckk designated hammer as a hydrodynamic shock absorber, extremely quickly and without causing a valve skipping the otillstand the valve euwingt · adjustment of the back pressure of the fuel in the space 13 ¹ + and is reduced in the leading to the shut-off valve passages, by the expansion of the piezoelectric cylinder of further ^x * raft-

8AD ORIGINAL

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substance is sucked in through the shut-off valve and thereby the injection pump can be operated again in the aforementioned manner.

FIG. 5 shows a longitudinal section through a piezoelectric pump according to the invention, which is suitable as a pump and distributor for distributing a fuel in a multi-cylinder engine. The piezeoel ^ ktrische pump section here corresponds to that of FIG. ¹ U Since this! Ecause the arrangement acts still to FIG. 5 in accordance with the arrangement of FIG. 3, like elements are equalized reference symbols are provided. The embodiment according to FIG. 5 differs from that according to FIG. 3 by the valve arrangement, which in the embodiment according to FIG. 5 is represented by the distributor area of the pump, which ti ldet the lower ignition of the arrangement. This distributor area has a shaft I ¹ K) which is set in rotation by the internal combustion engine. The shaft 1 * + 0 is rotatably mounted in a part 1 ^ 2, which is thin ochraubbolzen connected to the centrally arranged core. The Ausführungsbeispie1 of Fig. 5 is - viewed in the plane of the drawing - shown at the bottom right a recess 1M + serving to receive a screw bolt. The part 1 ^ 2 is separated from the centrally arranged core by a sealing ring-like spacer 1 ^ 6. A disk 3A8 arranged in a central opening in the spacer 1H6 is set in rotation by the shaft 1 ^ 0. This slide has an opening 150, the purpose of which is explained below. The space between the spacer and the disc l * + 8 and the bottom of the shut-off valve 82

909885/0459 - 17 - _{BATH 0W} G _1N AL

comprises a spacer 152 iuf which, together with the bottom of the shut-off valve, forms the passage 2 which is connected to the pump chamber 75 by the passage 98. The passages 92 and 98 are further connected with a passage 156 which is aligned with a corresponding JtellunE the Echo I l ^l be t8 mti the passage l5ü. With the corresponding position of the ciche disc l * + 8, the passage 156 is connected via the passage I5ü with a passage l6ü arranged in the part 1 ^ 2. This case occurs only in a certain position of the ucheibe 1 ^ 8. Passage I60 is connected to one of the engine cylinders by high pressure line 162. Further passages 156 and 160, which are arranged in the elements 152 and IU2 and shown in dashed lines in the drawing, are likewise coupled to one another through the passage 15t at corresponding angular positions of the rotatable disk 1 ^ 8. Each engine cylinder has such a set of passages. All of the passages 156 are connected to the passage 92. When the shaft 10 rotates, however, the passage 150 enables the fuel to flow from the fuel tank into the fuel line in the position in which the passage 150 creates the connection between the corresponding passages 156 and 160. The shaft 1 ^ 0 and the disk IU8 are mechanically driven by the motor, for example by the distributor hollow shaft or the camshaft. By correspondingly overlapping the openings of the passages 156 with the passage 150, any desired fuel injection time can be selected relative to the angular position of the crankshaft. The piezoelectric cylinder

BATH ORIGINAL 909885/0459 - 1 $ *

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calls for and controls the M en pe, the l'aii and the Lr .: cV Ίο ξ olnzuspritzendeu fcraftstoffes · Li: rotating ccheib '.- Ι ¹ * ·! ¹ connects this pump front by its usual "Kc '-: I.ür.i <<;! -' ji ^r ispritzleitunß gieigneter '' ^ narrow and ^ uerschni tta with 6 *>: a j ^ double cylinder.

- patent claims -

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Claims (1)

Patent claims: 1. Piezoelectric liquid pump, in particular a fuel pump, characterized in that the pump has a ηΐε fuel tank (* + 6 or 92, IGO, 116, 132 and 13 ¹ O serving container, that in the area of one country of this container a shut-off valve ( ^ 2 or 86) is provided through which fuel can flow into the container, that in the area of the other container, however, an outlet valve (^ l or 118) is foreseen through which fuel can flow out of the container and that the piezoelectric Pump is used to compress the fuel present in the container and to supplement the fuel discharged through the outlet valve. Piezoelectric. Fuel pump according to claim 1, characterized in that a cylindrical, piezceleictriseher body (3ü) is provided, which is polarized and provided with electrodes so that the body can be stretched and compressed in the longitudinal direction of the body when an electrical voltage is applied, so that? the piezoelectric body is arranged in a housing (2 ¹ O, the length of which is greater than the length of the piezoelectric body, that a circular cylindrical space (36) is formed between the piezoelectric body and the housing, dsß the housing (2 ¹ O in the area one of its front ends is closed by a cap (27) that the piezoelectric body through a filter (3 ¹ O with the cap (27) is connected, that the cap (27) with passages (l6) BATH ORIGINAL 909885/0459 -2C- Provision is made for the space (36) in a fuel-permeable connection with the circular cylinder (36), so that the piston (38) is connected to the opposite of the piezoelectric body and is reversibly displaceable with it, since the piston in the r ^ haufen (S ¹ +) is slidably guided and that the piston has a passage (Uo) connected to the Höuin (36) and into which the shut-off valve (h2) is switched (see FIG. 1). 3. Piezoelectric fuel injection pump according to claim 1, characterized in that a hollow cylinder (62) made of piezoelectric material is provided, which is polarized and provided with electrodes, so that the cylinder expands in the radial direction when an electrical voltage is applied. and it can be drawn together that concentrically to the hollow cylinder (62; a core (6Γ) is arranged, the outer surface of which forms an annular cylindrical space (70) with the inner circumferential surface of the hollow cylinder, so that the shut-off valve (86) is in a recess of the 'ΐ-rn (63 ) is arranged that the Gtirnenden of the Iiaumes (70) closing sleeve (6 ¹ +) is provided and that the space (/ C) through a passage (98) arranged in the core (68) with the fuel tank (92.100,116,132 and 13 ¹ O is connected. H. Piezoelectric fuel injection pump according to Claim 1, characterized in that the outlet valve has a disk (l ^l t8) and a shaft serving to rotate this disk, that the disk has an axially parallel passage 9 09885/0459 -21- has and that the fuel tank is provided with a plurality of separate outlet openings, which at. Rotation of the disk step-by-step with the passage (ijO) can be aligned congruently. 5. Piezoelectric fuel injection pump according to one of the preceding claims, characterized in that a fuel tank ( ^l + ü) is provided which has a shut-off valve (^ 2) in the area of its one .indes through which fuel enters the tank in the area The opposite end of the fuel tank has an outlet valve (50) through which fuel exits when a certain fuel pressure in the tank is exceeded, and a piezoelectric pump is provided to increase the fuel pressure in the tank and to supplement the fuel expelled through the exhaust valve. 6 · Piezoelectric fuel injection pump and spark plug according to claim 1 »characterized in that a fuel tank (h6) surrounded by electrically conductive walls is provided» so that the fuel tank is coupled to a shut-off valve (* + 2) permeable in the direction of the tank and to an outlet valve (50) »through which fuel at ^u exceed a given fuel pressure in the container flows out" that the "comprises iislaßventil a provided with electrically conducting end edges (52A) housing (52) that the electrically conductive walls are provided (26) MLT an end edge (26A) that an electrically insulating halfcange? 909885/0459 bathroom Bracket ( ^l f8) is provided by the zvLsch ·· · 1 ·. · Ι Danton (.2Cn) and (%: k) an I-'unkonstruc! '^ ISuiliot let, n <\ daii oLno for compressing the ^ raftsttffes in the "raf ta U-i'f Uihiiltor and only ..r ^ licensing of the through the nualaiventLl au": - o;: tci »iifir! :> af fcstof foa serving piezoelectric pump (3 <- «33) vcvz'jioIw-a klst, 7 · Piezoelectric fuel ο 5 n ^ prltzp ··: .. [>"■ according to i.nr.nruch 1» characterized in that the one with the oine-i;: t; rnf lacho de :: piezoelectric ^ rpors (3 -) vorburviene "olbor. O / l) the interior of the housing (2 ¹ +) in two .'-. Usdehnung ^ r. divided, so that the piezoelectric body is arranged above one of these recesses, so that the KoI te η (3 ^) o: .rie: -i passage ( ¹ ^ C / ascends, which connects the two outcomes: # imöJi £ ',' iri Since a shut-off valve (h2) is connected in the passage, so that fuel only flows from the first recess to the other side, since the second recess does not have an opening valve (5ü) is coupled, by the Überüchreit '- i of a certain lü'aftstoffcruckes fuel in the second recess, that a fuel line (16) connected to the ersiari recess is provided and that the fuel of the first evacuation in the second recess can be conveyed and through the exhaust valve (%) ausstc & ar. 8. Piezoelectric fuel injection pump according to claim 7, characterized in that the outlet valve (%) is designed as a flohr valve with a valve stem (5 ¹ O, and that the valve stem is flange-mounted in the region of its one country) 909885 / CU58 -23- or tellerartic from £ t> M idet is »rc dak the fuel is atomized v; Jrd. Ä.i. Piezoelectric i'raf trtcf fei n Spritzpuir.pe ^r : -; ch claim 1, thereby, -. Oken : z <'I chnot, d-.i. a hollow cylinder (6. ^Λ , .tu; piezcoloH.rirehem Kater: al is seen, the p ^ lariert and with lo 'trodon provided irt. so dai; dor cylinder Lr i AvilorGii a •.-1 c ^v tri see J.pamun; ' i, n this ZyI in «or in radial nichtune d'ilm- Γί-id compresslorh ^ r 'st, aim kcMZ--r.tr inch ζτ; Hi klzvllnder (ι 2; e'n ^ ern (C j rrvoririei i ^ t, doccon Mar. ⁴ c .liehe mit (irr ir.'ie'iuinfan ^ yf lache doc Γ.ι hlz / 11 'usually a kr. -i ^ ring-cylindrical look: iaup. ('7 ^) b'lciet, nali the free .Airneiiden des krei rrin £ zylj udr: öchen nv.mei · (' Λ) closed by a sleeve (6 ¹ O rind, daJ ir. r ^ reich de »a ·; ot: rne :: dec des ■; r: s (6Fi) e '·; through the'. ·; &'idu? v.en (/", ICC, 116,13 · - and 13 ¹ +; 'f,' 3if iioter ia'aftstoffbehälter provided ii-t, that- "n 'n' next to ZUTi! fuel tank an I ^ nlaiiabspcrrvent: 1 (36) is provided, that a first passage ( 9 ^) of this valve connects the ir.it 'Traftstcffbehälter, dai to a Zuf ;; hrun £ of "^ d-aftstoff cnender Lurchl;.; formed (Gc) in the core (62) and led to these valve Kist" DCL · the Raun ( "O and ^iv raftstcffbehälter by a second ι Lurchlaju (> ^are connected 8), and since ^ an exhaust valve (IL8) is provided by which on exceeding of a starry pressure fuel is discharged. - 2k - BAD OWGlNAi. 9 (19 885/0459 10. Piezoelectric fuel injection pump according to claim 9. characterized in that the hollow cylinder (62) made of piezoelectric Material in a cylindrical housing ('6O) is arranged that between the inner surface of the housing (6C) and the outer surface of the hollow cylinder (62). outer circular cylindrical space (66) is formed in the the hollow cylinder is extendable and that the passage (98ü) with the space (66) through a second passage (78.78 A) in front of burden is. 11. Piezoelectric fuel injection pump according to one of the preceding claims, characterized in that the outlet valve (II8) has a projectile-like hollow housing (102) with in the area of its one end radially outwardly directed ^{openings (10 1} +), wherein in the area of these openings a projectile-like formed closing element (EO) is provided that the element (126) is guided in a holder (H ^), so that depending on the position of the element (126) the Durchbrucherr (10 ¹ O are blocked and opened that the element (126) under the action of a spring (128) can be transported into a ^{position that can be closed by the openings (10 10)} , so that the raft material container (92, 100, 116, 13, 2.13 ¹ O with the bullet-like end of the element (126) is connected, whereby under the effect of the fuel pressure, the element (126) can be moved into a position corresponding to ^{an open position of the perforations (10 10)} t, and that to feed under 909885/0459 .- ² ? - '. ■■ .- ■ BAD Atmospheric pressure standing fuel of the space (66) with the inside of the element (126) is connected by a third passage (1O6.1O8.13O) 12. Piezoelectric fuel injection pump according to a here
of the preceding claims, characterized in that the piezoelectric fuel injection pump engages in an opening arranged in the cylinder head of an internal combustion engine and is coupled to a voltage source so that voltage pulses are supplied to the fuel injection pump synchronously with the engine, that the engine is connected to a fuel tank and that this Fuel tank is coupled to the piezoelectric fuel injection pump, so that fuel is injected into the cylinder at certain intervals. BATH ORIGINAL 909885/0458 Read more