Патент USA US2410946код для вставки
Nov. 12, 1946. L. E. JOHNSON 2,410,946 FUEL INJECTION MECHANISM Filed April 10. 1945 ~ 4 Sheets-Sheet 1 3 ' . INVENTOR. BYL/ayd ‘ME.% Jab/7:0!) /2’7h' I 117'TQENEY. 4 Nov. ‘12, 1946., ' ‘L. E. JOHNSON ‘FUEL INJECTION 2,410,946 MECHANISM‘ Fil'éd April 10.. 1943 ‘ ' ' ' 4 Sheets-Sheét 4 -HLM .. I _ ' " ,INVENTOR.‘ L/ayd E. Jab/75017 “M, ’ ATTOENEYI > Patented Nov. 12, ' ~ ‘ ‘ UNITED" STATES-* PATEN T 7. 2,410,946 : 2,410,946 ‘r OFFICE ‘ FUEL INJECTION MEcHAmsM . ‘ Lloyd E. J ohnson, Fon du Lac Township, Tazewell' County, Ill., assignor to‘Caterpillar‘ Tractor Co., San Leandro', Calif., a corporation of California ‘ Application April 10, 1943, Serial No.4482,577 1;. ' 2'Claims. (01. 251-145)" _ My invention relates to fuel injection mech caused by friction or rubbing, partsj is ofsuch anism, and more particularly to, a fuel injection nozzle ‘of the outwardly opening ‘valve type adapted for delivering timedinjections of liquid _ character asto enable the proper degree of com pression to be placed on the spring so that all fuel, into an internal combustion engine. Nozzles of this character may be employed ’ either for the injection of a readily volatile fuel, such as gasoline, into ‘an internal combustion like nozzles may have like metering char-v acteristics; is provided wit-h spring retainer means which cooperates in providing for proper compression on the spring, and which has a 1' guideless mounting in the nozzle to preclude engine of the spark-ignition type, or for the in damping effect on the, spring; .is well shielded jection of relatively vnon-volatile'fuel oil into a 10 against the entrance of dirt and other deleterious Diesel or compression ignition engine. Metering matter which might adversely affect proper nozzle of fuel to the nozzle is generally accomplished by operation; is providedwith means to enable'ac a fuel injection pump of any suitable type, which curate control of the extent of opening. of the ' is adapted to pump a measured 'quantity'of fuel valve; and which is of relatively simple and for each injection stroke of the pump. 'The pres sure of the fuel created by the pump causes open 15 . economical construction. ing of the nozzle valve to effect flow of fuel under } pressure, into the engine. Other objects of my inventionwill become apparent from a perusal of the following. description thereof. Referring to the, drawings: For e?‘icient engine operation, particularly in a multiple cylinder engine with each cylinder of 20 Fig, 1 is a longitudinal sectional view of one form of nozzle mechanism of my invention, which is associated a fuel injection nozzle, it is adapted for employment in a type of compression extremely desirable that the individual'nozzles ignition or Diesel engine in which it is now being have a high frequency operation. In other words, embodied; a portion of the precombustion cham the valve member in the nozzle should open in a minimum period of time for- discharge of fuel, 25 ber of- such engine being also shown, in section. The scale of ‘Fig, 1 is drawn to approximately and also close with a popping action to ‘shut off fuel discharge from the nozzle in a ‘minimum _ three timesfull size. Fig. 2 is an enlarged longitudinal sectional view time period, to insure good atomization of the of a valve assembly unit forming part of the fuel when the nozzle opens, and proper metering of the fuel at all engine speeds from idling to full 30 nozzle structure illustrated in Fig. 1. Fig. 3. is an enlarged horizontal section taken in a plane indicated by line ‘3-3 in Fig.1. load speeds. Such action is particularly desirable in high speed engines in order to provide for proper fuel injection timing. -‘ F18. 4- is an enlarged horizontal section taken In order to obtain the desired high frequency ~ in a plane indicated by line 4—4 in Fig. 1. Fig. 5 is an end view looking in the‘ direction nozzle, it is desirable to employ a high rate spring of arrow 5 in Fig. 2. , I in association with the nozzle valve member, or, in other words, a still’ spring which serves to close Fig. 6 is a fragmentary horizontal sectional elevation taken in a plane indicated by line- 6-6 the nozzle valve member‘ upon termination of in Fig. 1. , ~ , ‘ . fuel injection and against which the valve moves when it is opened by fuel pressure. Also, it is 40 Fig. 7 is a longitudinal sectional view of another desirable that the weight of the springrand the form of nozzle mechanism adapted for employ mechanism operated by the-spring be relatively ment in an engine wherein the valve may occupy light so as to minimize damping of the spring less space, such as in the head of a spark ignition ‘ engine; a- portion of, the engine being also shown which might otherwise be caused by the inertia of relatively heavy parts, thereby allowing the spring to act fast in closing the valve. _ 45 in section. The scale of Fig. '7 is drawn to ap proximately three times full size. ' My invention has as its objects, among others, the provision of an improved high frequency fuel injection nozzle of the outwardly opening valve type, designed to satisfy the above mentioned 50 requirements, and which employs a stiff or ‘high rate spring; is provided with a valve member hav ing a ?oating mounting in the nozzle sothat' dur ing movement thereof there can be no dampingv effect on the spring which might otherwise be 55 Fig. 8 is a horizontal section taken in a 'plane indicated by line 8-8 in Fig. 7. - ‘ I F18. 9 is a fragmentary section taken in a plane indicated by line-9—8 in Fig. 8. ' , Fig. 10 is an enlarged longitudinal sectional view of avalve assembly: unit forming part of the nozzle structure ‘illustrated in Fig. 7. ‘ Fig.11 is a horizontal section 7taken in a plane indicated by line ll—ll in Fig. ‘2,410,940 3 Fig. 12is a horizontal section taken in a plane indicated by line |2—-|2 in Fig. 7. Fig. 13 is a horizontal section taken in a plane indicated by line |3—|3 in Fig.‘ '7. In the embodiment of the invention illustrated in Figs. 1 through 6, the fuel injection mecha nism comprises a valve assembly unit A which will be described hereinafter in greater’ detail and which includes outwardly opening‘valve member 2 having a valve head 3 at one end thereof integral 4 production valve assembly units A, valve heads 3 may not all be of exactly the same axial thick ness which may result from the usual dimensional differences which occur in commercial produc tion, or the heads 3 might not all seat exactly at the same location on seats 6. Therefore, if nozzle tips 2| were employed having recesses 21 all de signed to have the same depth, the extent of open ing of the valve might vary among different nozzles. To insure that such extent of opening will be the same for all nozzles, I provide nozzle 'tips 2| having recesses 21 of varying depths; and with elongated stem 4, seat 6, spring retainer 1 associated with valve stem 4, ‘spring abutment‘ member 8, spring 3 compressed between retainer ‘I and abutment member 8, and sleeve || about _ in assembling the nozzle, the proper nozzle tip against a complementary tapered internal shoul der in outer sleeve l2. Valve assembly unit ,A is clamped in position within inner sleeve l1; and to provide for strength to withstand the clamping stress, sleeve I1 is preferably made of steel. At its outer end, sleeve 33 is-formed with a right angle extension 31 having fuel flow passageway 38, and which is adapted for connection to the fuel line (not shown) leading to the fuel injection is selected by testing to insure that the extent of opening of the valves will be the same in all abutment member 8. As can be noted from Fig. 2, assembled nozzles. spring 9 holds all the parts of this assembly to Means including the nozzle holder is provided gether with the exception of sleeve II which ?ts for transmitting clamping pressure through sleeve around abutment member 8. In the. compression ll of valve assembly A to clamp together seat 6 ignition engine in which such assembly is em ployed, there is su?icient space to provide a holder 20 and nozzle tip 2| in the holder. In this connec tion, it is, to be noted that inner, sleeve |1 ofthe therefor of sui?cient thickness of metal to trans holder is of less length than outer sleeve |2 of the fer heat away from the nozzle; this being desir ‘holder, and'that sleeve ll of valve assembly A able in a compression ignition engine because of extends beyond end surface 29 of inner ‘sleeve H. ' the relatively high maximum operating temper 25 A plate 3| having central aperture 32 is sup atures in such an engine. ported on the end of valve assembly sleeve U ad The holder includes an outer sleeve member l2, jacent surface 29, and transmits clamping pres within recess l3 in compression ignition engine sure to sleeve | I to hold the previously mentioned part |4 having external cooling ?ns l6. Prefer I parts together. Clamping pressure is imparted to ably, sleeve I2 is of a metal of relatively high heat conductivity, ‘such as aluminum, for the pur- ,, plate 3| by sleeve 33 screwed in outer sleeve |2 of the holder; sleeve 33 and sleeve |2 being locked ' pose of conducting heat away rapidly from the together by, means of L-shaped locking pin 34, nozzle tip. Press ?tted’ within the outer sleeve one leg of which ?ts through apertures in these I2 is an inner sleeve member |‘| having con parts,_and the other legIof which lies in a recess ically surfaced external‘shoulder l8 which seats 36 formed in the outer surface of sleeve l2. At , the fuel discharge end of the injection mecha 40 pump (not shown). I preferably provide in sleeve 33 a fuel strainer nism, vinner sleeve I1 is formed with an internal 39 to remove any relatively coarse foreign par shoulder l9 on which is seated nozzle tip member ticles, that may be in the, fuel. Any suitable 2| having peripheral shoulder 22 provided with a strainer may be employed; the strainer illus ?at seating face 23 resting on shoulder l9, and with an opposite ?at seating face 24 against which 45 trated comprising a cylindrically-shaped solid member having a plurality of axially extending rests one side of seat 6 of valve assembly unit A. spirally-shaped grooves 4| leading from one end Tip 2| ?ts with a light press ?t within the of the member to the other, and which form com aperture de?ned by internal shoulder l3, so as plementary spirally-shaped ?ns 42, the edges of to be readily insertable in and removable from inner sleeve I1, and has an axially extending 50 which ?t with slight clearance with respect to the inside wall of sleeve 33. As can be observed elongated fuel discharge passage or ori?ce 26, for from Fig. 6, each end of strainer 39 is formed the purpose of effecting a penetrating spray which with a pair of cross channels 43, the opposite ends is desirable in the injection of fuel oil into a com of each of'which communicate with sets of the pression ignition engine. Passage 26 communi grooves 4|. However, the channels 43 at either cates with a recess 21 formed in tip 2| to ac end of the strainer communicate with different commodate head 3 of the valve which is normally grooves than those at the opposite end. The sealed against one side of seat 6 by spring 9. Upon end of the strainer adjacent valve assembly unit injection of fuel by the pressure created by the A engages plate 3| which overlaps the inside of fuel injection pump (not shown), the valve will open to allow discharge of fuel; the extent of 60 sleeve 33, and consequently serves to seal off the grooves 4| at such end of the strainer, which do opening of the valve being determined bythe not communicatewith cross channels 43 atthat depth of recess 21. Thus, tip 2| serves as a stop end. for determining the extent of outward opening . The opposite end of the strainer engages plate of the valve. Preferably, the volume of recess 21 46 having an aperture 41 for flow of fuel there ‘ is at a. minimum with reference to the volume oc throughfrom passage 38; plate 45 and strainer 33 cupied. by head 3 to minimize the volume from being held in position by apertured spring 43 in which fuel ‘might escape after injection, thus the form of a bowed ring of sheet metal. As with minimizing dribbling at the nozzle. In this con respect to plate 3|, plate 46 seals of! the grooves nection, head 3 is provided with a cross slot 28 4| which do not communicate with cross channels to allow flow of fuel into fuel discharge passage 26 43 at the end of the strainer covered by plate 46. when the valve‘opens. , Thus, fuel entering the ends of grooves 4| at the In order to have the same fuel injection char inlet end of the strainer cannot escape from the acteristics in all like fuel injection nozzles, it is same groovesat the discharge end of the strainer, desirable that the extent of opening of the valve be the same for all such like nozzles. In various 75 but must flow over ?ns 42 which will strain out 2,410,946 foreign particles, andv into- the" grooves which I64 Ion'Ithe stem by 'mésnsj'brsprmg communicate with cross channels “at the‘ I ashoulder clearance space 65 ‘bei ngI vprovided : about stem- . 4 between the retainer and,v the stem.‘ A conically relatively viscous fuel oil such as is encountered 7 shapedhead '66 is formed Iadjacent shoulder 64 I strainer discharge end. The typev of strainer ‘ described is quite e?icient for the straining of ‘ merelyjtov enable gripping and centeringbf valve I in compression ignition‘engines' . member‘ 2'by a suitable tool" during manufacture 'For clamping the nozzle on the‘ engine, I provide an externally threaded ‘nut 49 having shoulder I ' thereof. Abutment'surface BJonItheretainerds I I made flat, Iand‘IspIrin'g 9 is‘squa'red off at its ends to engage an end Iof'oute'r sleeve l2, ‘ 5| adapted Ito ‘seat accurately; against; abutment surface *61, as well as abutment‘spacernaffTo enable posi tioning of the retainer aboutjstem 4,,it is provided and which is adapted to be screwed into?engine ' part l4 to clamp the apply pressureagainst’ sleeve 12‘ and‘ I I opposite endof sleeve 1 I2v against such I, ‘ engine part.‘ ' ‘ with an inwardly extending, slot 68. through which The seating (and ‘of sleeVe‘IlZ is pro stem 4 may be inserted. The periphery "69 of I with I sleeve l I," 52 adapted to engage a complementary conically v15 ‘ the, retainerv .isf‘j'free of ' .contact thus~ providing a guideless mounting therefor in shaped surface on‘ a shoulder 53 integral‘ with engine part 14. Preferably, clearance space 54 . the nozzle.I ' vided with a‘ sonically-shaped seating surface . The guideless mounting of. the’l‘valve not only ‘is provided adjacent the discharge end of the I ‘allows automatic centering thereof by " the fuel“ nozzle to provide insulation at .that pointj'and ‘ j stream, as was previously explained, but also pre- I cludes ‘ damping .effect on ' spring 9 which. would be caused if the spring were .to work against rub the portion of sleeve " I 2 adjacentI the discharge end of the nozzle is provided with longitudinally extending splines 56 I for the purposeI of ‘enabling I 1 vbing or'frictionallyengaging parts. Thus when‘ thesleeve to be turned by a suitable ‘tool for the spring closes the valve.‘ after termination of~~ fuel injection, it only has, to move the weight of In assembling the nozz‘leytip Mv and valveas sembly unit'A are ?rst 'pos‘itionedin ‘sleeve. I‘! 25 the valve and the'ret'a‘iner. .' This enhancesfast closing of the valve withIa popping'action; ' Fur which is press ?tted‘in sleeve l2." Then, nut 49 screwing on sleeve 33. 5 ,. ‘ . thermore, opening of the'valve by fuel pressure is also made faster by the eliminationIof rub may be placed over sleevevlz. Strainer 39, and its associated parts'may' then be. positioned in‘ sleeve 33 which is insertable through aperture 51 ‘Y in nut 49; and upon screwing sleeve33 in sleeve l2- against plate 3|, the parts will all be held in position. I I i ' ' ‘ bingparts, 30 , _ . lv '“ I "I With respect to prior. outwardly opening noz . ., ._ . ‘zle constructions wherein 'afspring ‘retainer is >. screwed on a valve ‘stem, I have found that such ' , arrangement is not desirable becauseia retainer ‘Valve assembly unit A of my invention‘forms I an important part thereof. 'With reference to Fig. 2, it is to be ‘noted that the' entire. valve nut screwed on the stem must be employed in as jsociation with othermeans for‘locking the 'nut. This ‘creates extra weight, the inertia of which member 2Ihas a ?oating mounting in thenozzle, as it is'not piloted in any way.‘ Stem 4 passes , loosely or freely through an enlarged aperture 58 ‘in seat 6, ‘and through an enlarged aperture 53’ 4-0 I in spring abutment ‘spacer member 8. Also, re-y 'tainer 1 is'not guided or pilotedin any way in - dampens the effect ofthe spring,‘ thereby'im peding fast action in opening .andjclosmg of the valve. Furthermore, it is relatively difficult with a retainer screwed on the stem to have )it hold its exactposition. at alltimes; and slight‘change ' in the position thereof causes variation in‘.v the I load imposed on the spring, which results in non ' during opening thereof solely by the fuel ‘stream ‘ sleeve ll. Thus, valve member 2 is" centered uniform spray characteristicsfamong various noz ' I 'l?ow'ing through the nozzle; and as a result the zles on an engine. - Since the retainer of my in vention is‘held'fIreely againstshoulder 64, spring > ' abutment‘ surface 61 thereof will I always _ I be at a I peripheral‘o-ri?ce, which is formed when valve head 3 is moved away-from the seating" side 59 of seat 6 by fuel pressure,_-will always ‘be of the ‘same width around'its' entire‘periphery, thus insuringa uniform spray at all times. This might . not otherwise be the case if the valve “member 2 ?xed position relative to valve stem'4." Another important feature .of the nozzle c'on- ' ' struction'. of my inventon. lies in I the provision ‘ of the removably mounted- abutment orspacer . were guided or piloted in the nozzle because such ' member ,8 which is held by spring 9 against: the I arrangement might produce cit-centering of valve " . sideof seat 6 opposite tothat against which valve - head 3 when it opens by fuel pressure. head 3 seats whenthevalve is closed. in assem To insure proper seatingof head 3 about its bly of the parts of ‘valve assemblyA, stem 4 is entire periphery, against seating side 59 of seat inserted ‘through, aperture 158 of seat I6 and 5 when the nozzle is closed, seating surface 6| of ’, through spring 9, Retainer 1 is then? slipped I head 3 is formed to have the shape of a ‘segment over stem 4 and spring}! is held againstretainer of, ajsphere, and is adapted to engage along an. edge ‘62' at an inner beveled part 63 in seating '60‘ abutment surface 61 by any suitable instrument. "side 59. Thus, should there be slight misaline- I ment of valve stem 4 in the closedIposition of stem 4 between seat 6 and the end. of- the spring the valve, head 3 will always be tightly‘ sealed _9 opposite that resting‘ againstvretainer abut? about its entire periphery. This is important in precludingdripping. at the nozzle. In this con nection, it is to be? observed that the peripheral surface of head 3 ‘throughout its entire path of movement during opening and closingv of the nozzle, has relatively wide clearance in recess ' Abutment member ‘8, which is provided with an inwardly extending slot 1|, is-thenslipped over 65 ment surface 61. I provide abutment members 8 of various thicknesses; and’byv a suitable cali brating instrument, I measure the load on spring .9 resulting from theinsertionof various abutment members 8. , By selecting an abutment member of the proper thickness, the same predetermined’ 21' of nozzle tip 2|. ‘Such guideless mounting of the head cooperates in permitting accurate seat 70 load maybe placed on, spring 9 for all like-~noz-' zles assembled. Thus, such arrangement .00, ing thereof. . I With particular reference to spring‘retainer 1, ‘1 ’ operates with the other features ‘mentioned in I insuring that alllike nozzles will have. uniform it is to vbe noted that it ?ts freely .or loosely about stem 4, and is 'held against a bevelled spray characteristics.‘ ' . - ., _' After assembly of the selected abutment mem I 2,410,040, to recess I00; the axes of such passages being ar her. 0, sleeve I I, is then slipped over the periphery of the abutment member to center it properly. ranged tangentially with reference to the center or recess I00.‘ Thus, when the valve is opened by pressure of fuel, a swirling motion will be im parted to the fuel. In this connection, it will be noted that ori?ce. I" is- shorter and of larger diameter than ori?ce 20in the previously de Thus sleeve I I not only serves to transmit clamp ‘ ing pressureiohold the nomle assembly together in the manner previously described, but also serves as airetaining means for abutment mem- ' her 0. In this connection,‘ it isgto be observed scribed nozzle'.--so as not to impede the swirling that theportion of sleeve II adjacent abutment e?ect impartedtothe fuel. _ member 0 is provided with increased thickness As with respect to the nozzle of Figs. 1 through at ‘I2 to center the end of spring 0 adjacent 10 in nozzle tip 00 con abutment member'l. ‘ . The embodiment ‘of the invention illustrated in Figs. 7 through 13 isessentially the same as .6; the depth of recess I00 _ . itrols the extent of opening of the valve. To in. sure that the valve will open to the same extent for'allv like nozzles manufactured in production, that previously described, insofar as the con tips 00 are, provided with recesses I00 of prede struction of valve assembly unit A? is concerned. 15 termined depth: and by selecting a tip having a Thereforeysuchunit will be described primarily proper ‘depth recess, during assembly of a nozzle, the extent of opening of the valve may be made uniform for all nozzles as in the previously de with reference to the differences between it and the previously described valve assembly unit A. Unit 'A‘ comprises valve member 02 including modi?cation.‘ valve head 02‘ and stem 04, seat", spring re 20 scribed Although any suitable strainer-may be em tainer 01 mounted freely about stem 80 and thrust : vployecl about tube I02; in the embodiment of the against shoulder 00 on stem‘ 04 by spring 00, and invention illustrated, I preferably employ as the ‘ spring abutment spacer member-0| interposed be strainer a spring coil III in which the individ tween spring 08 and seat". Spring retainer 01 ual coils .are relatively close together so as to is provided with ‘inwardly. extending slot 02 to 25 strain out foreign particles that may be in the enable the retainer to be slipped over stem 04; and abutment‘ member 0| is formed wlth'a simi fuel. ,. Tube I02, as canbe seen from Fig. 8 is ‘non-circular in cross section, and its corners II2 lar slot 50.‘ ‘ are formed with screw threads III in which coil predetermined thick-. ‘Abutment member 0 I is of III is screwed; coil III being spot welded to tube 30 ness to place a predetermined load on spring 00; I02 at suitable points I“ to hold the coil ?xedly and the'parts are assembled in the‘ same way as in position. Preferably, the outer peripheral sur in the previously described embodiment of the face of the coil is ground flat as shown in Fig. invention, a sleeve 04 being provided about abut 9, so as to eliminate any wide spaces between ment member 0| to maintain the'abutment mem the interstices of the coil in which relatively wide ber centered. In this connection, sleeve 0| is 35 particles might become caught, and thus clog the also provided with a portion of increased thick ness 00 adjacent abutment 9| to serve as a cen The construction thuslfar described provides a strainer. tering means for spring 00. As can be seen most clearly from Fig. 10, the ‘ valve assembly unit‘A’, is contained in a holder 40 01 which is in theform of relatively soft ductile seamless metal tubing having its opposite ends 00' pressed or rolled over nozzle tip member 99 and a plate member III, respectively. The pe rlp _eries of both nozzle tip member,” and plate member IOI are formed with tapered surfaces I00; and when the ends of holder 01 are engaged over'these end parts, the entire assembly will . I complete unit, as shown‘ in Fig. 10, which may be mounted in the engine. If the strainer de y. scribedis not employed, the unit will be the same , , as that illustrated in Fig. 10 with an ordinary plate substituted for flange I0 I . Fig. 7 illustrates a form of mounting means for ' the nozzle in an engine. Such mounting means will ofcourse vary with various engines, depend ing upon space and size limitations. The mount ing means illustrated comprises an adapter sleeve ,I I6 screwed in head III of the engine, and form a compact unit in which holder 91 serves having intermediate cooling ?ns “'8 located in 50 as a tubular capsule providing a sealing envelope space ,IH) in the engine head. Splines I2I are for the parts contained therein. Furthermore, formed on adapter Iii to enables. suitable tool nozzle tip 09, seat 00, sleeve 04, and plate IOI will to be engaged therewith for screwing of adapter be'rigidly clamped together by clamping pressure I it into head Iil. Internal threads are provided transmitted through sleeve 04. In this connec in adapter I I6 at the end opposite to that screwed 55 tion plate IOI, although it may be a separate 'in the engine head, into which an elongated member if so desired, is formed as an integral clamping sleeve I23 may be screwed for clamping ?ange on strainer tube I02 which has apertures the nozzle in position. The tapered end parts > III to allow flow of fuel into the interior there I00 of the nozzle enable proper centering thereof of, and a strainer I04 about the outside thereof when clamped in position. , 60 which will be more fully describedvher'einafter. To facilitate removal of the nozzle when sleeve The head of the nozzle valve of Figs. 7 vthrough I23 is unscrewed, I provide a sleeve I20 within 13 is designed‘ for injectionof volatile fuels, such clamping sleeve I23 and which has one ‘end as gasoline, into a spark ignition engine. In screwed onto a boss I20 integral with strainer such engine, it is desirable that the fuel spray tube I02, and the opposite end'provlded with a. 65 be more ‘ diffused than fuel oil injected into 9. ‘ ?ange I2'l adapted to engage an internal shoul Diesel engine. For thispurpose, valve head 83 der I28 formed in sleevel23; the sleeve‘ lube which is contained in recess I06 in nozzle tip ing formed with apertures I20 to allow fuel which ‘ memebr 90, is so formed as to impart a swirling ' ?ows therethrough, to ?ow into sleeve I22'and motion to the fuel for passage through discharge through apertures I02 in strainer tube 102, to ori?ce or passage I01 in nozzle tip 80. With ref 70_ ‘the nozzle. Since flange I21 is engageable with erence to Fig. 11, it will benoted that the side of shoulder I28, it will be apparent that upon un head 03 adjacent ori?ce I01 is formed with a cen screwing of clamping sleeve I23, the entire nozzle trally disposed recess I00 in line with ori?ce I01, assembly will be removed from the engine when and with a plurality of inwardly extending pas sages I00 leading from the periphery of the head 75 sleeve I20 is lifted oi! the engine. 'A notch I20 2,410,940 9 I . is formed in ?ange I21 01' sleeve I24 toenable in sertion of a Suitable tool for screwing such sleeve relative to boss I26 01 strainer tube I02... To pre vent turning of sleeve I23, when the nozzle is . ' clamped in position, an aperture I30’ is provided therein for insertion oflocking wire that may be to any considerable extent when it is desired to connect it with or disconnect it from sleeve I23. I claim: ' > 1. 'A fuel injection nozzle comprising an aper tured valve seat, an apertured spring abutment member adjacent the seat, a. valve stem passing with clearance through the seat and abutment wound about‘a suitable part of the engine. A special ?tting is provided for connection 01’ members and having a head On one end engage fuel line I3I to the described nozzle mounting able with the seat, a spring retainer loosely con means, which enables proper connection of the 10 nected with the opposite end of the valve stem, fuel line irrespective of the‘~ angular. position aspring interposed between said retainer and thereof with respect to the nozzle axis. With said abutment member to urge the ,valve head reference to Fig. 7, it is to be observed thatthe toward the seat, and a separate sleeve member end of sleeve I23 opposite to the nozzle end, is provided with an inward taper I32 over which 15 embracing the abutment member and a portion of the spring to center them relative to the seat complementary tapered ring I33 is adapted to but free of contact with the retainer member ?t; ring I33 being formed with an internal an and the greater portion of the spring whereby the nular fuel passage I34, and being provided with ’ valve stem is unguided with relation to the seat. tubular part I36 into which fuel line I 3I is rig 2. A fuel injection nozzle comprising a seat idly connected and sealed by suitable welding 20 having an aperture therein, a valve member hav I37. Ring I33 is clamped in position by a cap ing a head adjacent one side of the seat and a screw I 38 screwed into clamping sleeve I23, and stem. extending through the aperture, the stem having a head I33 between which and ring I33 having a guideless mounting in the nozzle, a is interposed sealing gasket I4I. Cap screw I38 shoulder on the stem, an abutment member re is provided with internal passage I42 communi movably positioned at the opposite side of the cating with apertures I43 in the wall thereof, to seat and through which» the stem extends with . permit ?ow of fuel from passage I34 in ring I33. clearance, spring retainer means about the stern Apertures I44 in head I39 of the cap screw per adjacent the shoulder and having a guideless mit insertion of locking wire which may be wound mounting in the nozzle and a free mounting rela about Dart I36 to hold cap screw I38 against 30 tive to the stem and moveably engaged with the turning. -? shoulder, spring means about the stem between From the preceding, it is seen that irrespec the abutment member and the retainer means, tive of the angular position of fuel line ‘ I3I, it and a sleeve about the abutment vmember and may be readily connected by the described con? the spring means engaging the periphery of the nection, to sleeve I23, and that because of the abutment member for retaining the abutment tapered ?t at I 32 between the end of the sleeve member in position, the sleeve being separable and ring I33, the connection will be tightly main from the seat and having a portion adjacent the tained irrespective of engine vibration. It is to abutment member ‘for centering the spring be noted that the tapered ?t I32 is only at the means and the remainder of the sleeve being free end of sleeve I23 and the part of ring I33 ad of engagement with the spring means. jacent suchend, and not with the entire ring. As a result, fuel line I3I does not have-to be bent E. JOHNSON.