CA1160524A - Pressure regulator for injection systems of controlled ignition internal combustion engines - Google Patents
Pressure regulator for injection systems of controlled ignition internal combustion enginesInfo
- Publication number
- CA1160524A CA1160524A CA000370806A CA370806A CA1160524A CA 1160524 A CA1160524 A CA 1160524A CA 000370806 A CA000370806 A CA 000370806A CA 370806 A CA370806 A CA 370806A CA 1160524 A CA1160524 A CA 1160524A
- Authority
- CA
- Canada
- Prior art keywords
- valve element
- flat
- pressure regulator
- flat surface
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
- F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
- F02M69/20—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air the device being a servo-motor, e.g. using engine intake air pressure or vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/54—Arrangement of fuel pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
- F16K7/17—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being actuated by fluid pressure
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
- G05D16/0663—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using a spring-loaded membrane with a spring-loaded slideable obturator
- G05D16/0666—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using a spring-loaded membrane with a spring-loaded slideable obturator characterised by the form of the obturator
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
- Fluid-Driven Valves (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
PRESSURE REGULATOR FOR INJECTION SYSTEMS OF CONTROLLED IGNITION
INTERNAL COMBUSTION ENGINES
ABSTRACT
The purpose of a pressure regulator for injection systems is to control the fuel feed pressure to the injectors by comparing it constantly with a set value, in order to keep the air/fuel mixture ratio correct under all engine operating conditions.
In general, it consists of an arrangement of various mechanical components which act in order to divide the fuel stream delivered by a pump into two unequal parts.
One part of this stream is made available to the injectors, which absorb that quantity required by the engine operating condition&.
The remainder is returned to the vehicle tank.
INTERNAL COMBUSTION ENGINES
ABSTRACT
The purpose of a pressure regulator for injection systems is to control the fuel feed pressure to the injectors by comparing it constantly with a set value, in order to keep the air/fuel mixture ratio correct under all engine operating conditions.
In general, it consists of an arrangement of various mechanical components which act in order to divide the fuel stream delivered by a pump into two unequal parts.
One part of this stream is made available to the injectors, which absorb that quantity required by the engine operating condition&.
The remainder is returned to the vehicle tank.
Description
1 ~6052~
DESCRIPTION
The invention relates to fuel pressure regulators.
The characterizing part of the regulator described in said patent application is the use of a valve element constituted by a hemisphere, the centre of which is contained in the plane surface which bounds it and which controls the inlet to the return pipe to the tank. This valve element is urged by resilient forces in such a manner as to remain in contact with the walls of a cavity formed in a support rigid with the diaphragm, such that the movements of the plane of the valve element are equal to the movernents of the support.
This pressure regulator proposes configurations which are new from the patent aspect, original and technically valid. How-ever, it has certain constructional and assembly problems which are difficult to solve in the case of mass production.
The object of the present invention is to obviate the afore-said problems by means of a valve element which from the functional aspect does not deviate from the solution proposed in said patent application,~but w~hi¢hiis more able to solve the cQnstructional and as~sembly probler.ls arising i~ mass production~
The subject matter of the present invention is a regulator characterized by that given inclaim land illustrated in Figures 1 and 2, which are given as a non-limiting example of the pre-sent invention.
Figure 1 is a partly sectional view of a regulator according to the invention on a plane containing the axis of symmetry of the device.
l 16~52 ~'ic,vra ? is a p.lr~ r section~31 ~i-e~ of ho v~lv3 ele..lert formin.;
~rt ~ ~"le r~ or ~f 1~ r~ ~V
l1he rs~ tor illustrated in ~ i~ure 1 iB constituted by 3 met~l casing 1 di~ided internally by C3 dlJ~pAra~ 2 into two non_co~r~unic3ti ch~r~ber3 3 and 4.
The chamber 3 i9 def`ined by a housin~ 30 in addition to the dia~h~
DESCRIPTION
The invention relates to fuel pressure regulators.
The characterizing part of the regulator described in said patent application is the use of a valve element constituted by a hemisphere, the centre of which is contained in the plane surface which bounds it and which controls the inlet to the return pipe to the tank. This valve element is urged by resilient forces in such a manner as to remain in contact with the walls of a cavity formed in a support rigid with the diaphragm, such that the movements of the plane of the valve element are equal to the movernents of the support.
This pressure regulator proposes configurations which are new from the patent aspect, original and technically valid. How-ever, it has certain constructional and assembly problems which are difficult to solve in the case of mass production.
The object of the present invention is to obviate the afore-said problems by means of a valve element which from the functional aspect does not deviate from the solution proposed in said patent application,~but w~hi¢hiis more able to solve the cQnstructional and as~sembly probler.ls arising i~ mass production~
The subject matter of the present invention is a regulator characterized by that given inclaim land illustrated in Figures 1 and 2, which are given as a non-limiting example of the pre-sent invention.
Figure 1 is a partly sectional view of a regulator according to the invention on a plane containing the axis of symmetry of the device.
l 16~52 ~'ic,vra ? is a p.lr~ r section~31 ~i-e~ of ho v~lv3 ele..lert formin.;
~rt ~ ~"le r~ or ~f 1~ r~ ~V
l1he rs~ tor illustrated in ~ i~ure 1 iB constituted by 3 met~l casing 1 di~ided internally by C3 dlJ~pAra~ 2 into two non_co~r~unic3ti ch~r~ber3 3 and 4.
The chamber 3 i9 def`ined by a housin~ 30 in addition to the dia~h~
2. ~ha char~ber l~ el^ined b~ the kolisin~ 40 in ad~iJ,io~ t,o ~i.d diapllra~m 2.
~`he ed~es 31 and ~1 OL ths two hou~ings 3 .3nd 4 support thè diap}Lr~g~
and are cl~ ped to~ether by mean~ o~ 3 rin~ 9, the part~ 90 i3nd 92 of which r~?st re~pecti~ely on thc? cone-frustum parts 32 .3nd 45 of th~? ad~,e.s 31 and 41.
~he ch3.~ber 3 is connected to t'ne intal;e l~anifoltl, not ~3ho~,~m~ ~J
mean~s o:~ a fir3t pip~?~ al_.o not sho~ hich i~ ount~. over th~-~ tv.b~
10, Thus the referel1ce pressure of tho intake ~ani~old beco.~3 established i~ the cha~mber 3.
The cha~ber 4 i8 connected to the fuel feed pu~p by mo3ns of a second pipe~ not shown, mou~ted over ths tube 11, 3nd conn3cted to th~
in~ector~ o~ the iniection systeLl b~ means of 3 thira pipe, not ~hown~
~ounted over the tube 12, and furthsr connected to the Yehicle fusl tank by ~eans of a fo~th pipe, not sho~n5 mo~m ted over the co~n~ckion tube 5.
If convenient or ~uit,3ble, the lnlet connectors 11 and 12 can ba rQdllced to the sinr-~le connector 11.
'~he con~3ction tube 5 co-.~prises a pa-t 50 W`nic~ is lnr.e~ted into s th:ron~h bore 44 provided :in the lo.;er p3r-t of the houst~ 40, ~t the top Or the throu~h bore '~4~ ~nd on the fi~ a~ci.~ c~S it, ther~
is a ~e;3t 46~ which i~ polygon.~l .rhen vie.re(l in pl.3n a}td which contai~
~ 1,;., the he~a,on.31 he3d of tlle tuae 5 to pre~ent th.ts :Latter fro~
roL"~tin".
A cone-.f.rustuLl surf,3ce 43 connects the borc~ 44 to the se3t 46J
The ^one-~ru~tu.rl ~urf,3ce 52 :fh' ch form~ p3rt of the tube 5 sit;s the.rein~
Th~s couplil~ provides .~ ~oo~ "uel ~eal torard~ th~ outside of the ch~.lb-~ thi~i ~.al beinl-; e~h3r~ced ~y th~ ti.~ .en,n,; e~ fect Of 3 nu-t dispoaed on the threaded p3rt 53 of the tu~e 59 ~he tube 5 also co~p:rise.~ a c~rlindrical compartr~ant 5l~ into ~rhich the member 6 comprising the v31ve seat is Porcibly insertedO
The flat vslve seat 61 and ~ flat sur~Dce o2 defi.ned b~ 8 CirClllar rim are t~e most lmportant parts of the member 6~
The ~am`~er 6, ~uppo.rted by -the tube 5, corlstitutes the ou,,let noz~le end e~tends into th~ secor~d chs~.ber l~, I'he Pl3t ~eat 61 is controlled by the ~13t sur~ce o~ a v~lve eler.l~t 7. A 3prin~ 63 is disposed between th~ circula.r ri~ ~urfac~ 62 and a similar surf3ce 73 provided on the v,~lve ele~nt 7.
The ~pring 6~ keeps tho spherical part of th~ v~lv~ ~le~ent 7 i.n contact with the conical sur~ace ~1 of -the comp~rt~ &o pr~vided in the support 8~ which ir3 made riOid wlth the diDphr,a,gm 2 by ~ea~9 oI the cE~p 20.
Thc low~r ~nd o~ a colltrol spxin5 21 ~' t9 on the cap 2~ lts other end b2i3,s su~20rted by a spring support c~p 22. Thi~ 1.3tter cGmpri ~ con~ral bore 23 ~,rhich housas the conic.31 poi~l t 14 of a he~go~al socket_he~ded screw 13 i~sertel into the thre~ded bo~e 32 whicn t,.r~ar3e3 ~h~ protuberar.ce 33 on the tov OI th3 hou~in~g 30~
~y ~d;~ustinr~r th~ screw 13~ the ~cprinrJr 21 can be pre-lo~dad to 3 ~ n~d ~r31~ T.~ ~h~ d~d b~.r~ e2~ p~rl~ t~ be~o~ t~
CY11t1driC31 col~p~3rt~ant 34 containing the e~.pa~si~n c~p 15, ~.hi~h 6d52~
~71'é!~ ,1 G 3~ jliC.t~ ~3ni: o ~ ',hc? sc7~C~w ~ ~ by url~lu.31if~L3~1 pc~opl~ .
`~iure 2 il.:!u;,' r~JI,e ~ 11 detail ,,~.e vall~e ele~e~lt 7 disposeù in b~ ;S COl~ir3~ bLlen~. ~0 OI` .t;'iOrure 1~
l'he ~a:l.v~ ~sla~tent io con~tl~uteil b~ e spl~ric~l ~art 72 which ~akes contact ~/ith the cone_.~rustu.~ p3rL 31 o~ the compartment ~0 to for.~ cs bcsll and soc'.~et joir.t 9 a I`lat ~sur~'~ce 75 ~.~hich ~. kept faci~ thr f~at se3t 61 defininc, the outllo:~ sec';ion for th~
eXCeS9 fu31~ a flat ~urfaca ~3 of circul3r ril~ shc3 V~ on which the upper end of the ~spring 63 rest , a cylindrical surface 74 which co~3ecto tog~ther the ~ur~aces 73 and ?5 and o~ver which cs fa~J
tUrD~-s of ~he sprin6 63 ~sre forced during a s-tag~c preced~ng -th~
s~ssembly of the co~lete re~sulator, ~s dead bore 75 provided per~endicul~sr to tha rlat surfaca 75, and a cylindl~ical SlbeL~ 7~
WAS1iCS1 extelld~; aboire ..he fl~t ~urFace 71 di~;poseà irl tha~ zone 0f the ele~nent 7 opposite tna surf3ce 75.
The element 7 has an axis of sy~.t~metr~ A-A which co-i~cide~ with ~h~
axe~ of syi~etry o~ the bore 76 and stem 70.
The centre C o~ the epheric~l ~ector 72 i~ contained either in the pla~e 75 or in a plana p~rallel to the plano 75 but displaced dow~wards.
Even though not directly relevant ht?re~ the opsration of s l3res~ure re~ul~tor ~ill be brielly de~cribed~ in order to shot~ the i~portance of di~po~ing the centre o~' rotation C of tile valve ele~ent 7 in the plane 75.
~urlng en~,ine oper.~3tion, -t'ne ~;iPferr~nce b.?-;;ee3l c.~e p~cs~ure n the ~njector iU'?~ feecl p:ipe co3~ ected to t;le centrol chc3;~ber ~ by the tube 12 3nd the pre.~ure in thc int.3ke ~3nif'cla in ~./hich che in~ectcr~
c3re ài~oscr] ~ust rel3-3i.n con~':ent ~or 311 operational ~t.3tes o the ~ !Igine O
1 1~0524 To attain this, the regulator varies the discharge area defined between the surface 75 and the seat 61 of the nozzle 6. Assum-ing that the manifold pressure increases, then in order to maintain said pressure difference constant, the flat surface 75 approaches the nozzle 61 by virtue of the thrust caused by the increase in the pressure acting on the diaphragm 2 on that side facing the chamber 3, in which the pressuxe existing in the manifold is established, as already stated. The consequent reduction in the cross-section for return to the tank causes the pressure in the chamber 4 to increase by a value practically identical to the pressure increase in the chamber 3, so main-taining a constant pressure difference between the injector feed and the intake manifold.
If the manifold pressure falls, then the regulator makes the required adjustment to the injector feed pressure by withdrawing the surface 75 from the nozzle 61 by means of a similar mechanism.
The configuration described here allows both easy construction, as will be illustrated hereinafter, and in increase in the self-stabilising characteristics of the valve element 7, as it is now possible to displace the centre of application of the resultant of the closure forces on the valve element further below the control plane defined by the surface 75, and to displace the re-sultant of the opening forces exerted by the spring 63 resting on the circular rim of the valve element 7 fu~ther above the plane 75.
The invention solves particular production and assembly problems.
The valve element 7 can be produced by machining with automatic 1 160$24 - 6a -machine tools startiny from a cylindrical bar of suitable material. There are various methods for the mass production of the element 7. Two will be described to explain the simp-licity of execution.
l 16052~
~- 7 -'rne f'irst me'4hol coL,~.r S'3 ~h' ~;: of a for~ tool on an automat~c 1 3 i;~13 ~
The ~rofile of ~his tool cor,-*s~o~ds to the fi.,~ure which generales the~ elelnont 7~ exclu~inr tho oore 7~9 ~,~h~n the bar rota4es about the axis of re~olut,ion ~ A.
The bore 76 is .'or~ed by ~ea~s of a drillin~ bit.
The second ~ethod uses a pro~,rrJ.~ lathe w`~lich proceeds by crossad feed to comple4sly de.ine the ele~lent 7.
In order to be+ter understand ths purpose of the r~tel~ 70~ which physically de~i~es ths axis OI sy~matry of the piece 7~ consideration ~ust be ~i~ren to the fact that tn~ rou~ghness of the surfaco 75 ~ust be kept ~ery lo~ for correct op~ration of tll~ re~ latorr To obtain a sur-ace o~ ~ery low -rouc~i~ness, a lappin,~ operation mu3t be carried ou~ on the surface 75 after defininy~ the element 7.
'l'hls ope.ration can b~ carried out on as many ele.~ent3 a3 can b~
contalnad by a sln~le fixture.
~hi~ fixture consist~ of a matal plate in which a plurality o~ bor~
are pro~ided~ each of which can house the stem 70 of the element 7 to ~laintain it~ axi~ of symmetry perpendicular to thc plsn~ of the plat,e. Consequently, ths plane 75 is parallel to the plane of ths pl~te and ~acing ou~ ard~, where3~ the ~'lane 71 abuc~ aOain~t ti plate aul-face.
'.Jith the piQC~ 7 -~ount~d on chi~ plate ~y ~nsert.in3 thr.~ir ste~s '~0 into the reapecti~r-~ ~ore~, a la.l?pinO -t~a'l. iG dri-~e~ rer all th~
~urf`~c.~-~ 7~, :lhiC~ a~ 9 now in a ri,~-,idly po~iti~ned and well definr3d planr~ .
~i`hra ci~oice of the ~hape show~ in l;'i~ure 2 Eor th~ ~al~e elcment 7 ~3kr~ i~ possible to a.,aem`~le the re~u1.~or 1 by aul;or~at~c ~acihi,lea, 5 2 ~
._ r~
;'his is be~ jl;,~ e t}ie '.jOI''_ 75 e~ s the pi.~ro 7 to ~je s.llI;por-cacl bvr !leani~ oi all 3p~ro,0riava a~ o;~ ic L~achi.na f.ixturo d~rir~t.~ ne stag~e OI the a6ioie~b~
This fi~tu~e keeps it C03Xi el to vhe CeSin~ 40, iO ;.~kini~r ir immedi~tely possiblL~ ro I:ind co3~cialit~ betwe~n the hou3ii~g 40 a~d the support ele~,ent ~3~ the cone-frus-tu,i~ C3~rlv~ ol of which i8 isu~ported b~ -the rlnlle~ical surf3ce.72 o. the element 7.
The diaphraO~ 2 thus bveco~e~i correctly positio~ed .~i,,h reGpect to the edg~ 1~1 of the hou~iing l~o.
Tho subsiequent operatlonsi involrin~- the asseL~bly and satting of the sprin¢ 21~ and tle ~sse~lbly and clalnpin~ OI the housin~ 30 by me~ns of the rin6 9 can be i~ediatel~ carried ont in 8 particularl~ imple !nanner.
mhe aforec~oin~-; cle~-icriJt:ion relavesi-vo onl,~r one oF the possi;~
embodi~erltiYi OI- the invention" to t~hich conetruc-tion31 nodificationo can be made withouit leaving the scope o.î tlle inventive ldea.
The sh~pes, di~ension3 ~3nd r~terials used do not limit the ~cope o~ the invention.
. .,
~`he ed~es 31 and ~1 OL ths two hou~ings 3 .3nd 4 support thè diap}Lr~g~
and are cl~ ped to~ether by mean~ o~ 3 rin~ 9, the part~ 90 i3nd 92 of which r~?st re~pecti~ely on thc? cone-frustum parts 32 .3nd 45 of th~? ad~,e.s 31 and 41.
~he ch3.~ber 3 is connected to t'ne intal;e l~anifoltl, not ~3ho~,~m~ ~J
mean~s o:~ a fir3t pip~?~ al_.o not sho~ hich i~ ount~. over th~-~ tv.b~
10, Thus the referel1ce pressure of tho intake ~ani~old beco.~3 established i~ the cha~mber 3.
The cha~ber 4 i8 connected to the fuel feed pu~p by mo3ns of a second pipe~ not shown, mou~ted over ths tube 11, 3nd conn3cted to th~
in~ector~ o~ the iniection systeLl b~ means of 3 thira pipe, not ~hown~
~ounted over the tube 12, and furthsr connected to the Yehicle fusl tank by ~eans of a fo~th pipe, not sho~n5 mo~m ted over the co~n~ckion tube 5.
If convenient or ~uit,3ble, the lnlet connectors 11 and 12 can ba rQdllced to the sinr-~le connector 11.
'~he con~3ction tube 5 co-.~prises a pa-t 50 W`nic~ is lnr.e~ted into s th:ron~h bore 44 provided :in the lo.;er p3r-t of the houst~ 40, ~t the top Or the throu~h bore '~4~ ~nd on the fi~ a~ci.~ c~S it, ther~
is a ~e;3t 46~ which i~ polygon.~l .rhen vie.re(l in pl.3n a}td which contai~
~ 1,;., the he~a,on.31 he3d of tlle tuae 5 to pre~ent th.ts :Latter fro~
roL"~tin".
A cone-.f.rustuLl surf,3ce 43 connects the borc~ 44 to the se3t 46J
The ^one-~ru~tu.rl ~urf,3ce 52 :fh' ch form~ p3rt of the tube 5 sit;s the.rein~
Th~s couplil~ provides .~ ~oo~ "uel ~eal torard~ th~ outside of the ch~.lb-~ thi~i ~.al beinl-; e~h3r~ced ~y th~ ti.~ .en,n,; e~ fect Of 3 nu-t dispoaed on the threaded p3rt 53 of the tu~e 59 ~he tube 5 also co~p:rise.~ a c~rlindrical compartr~ant 5l~ into ~rhich the member 6 comprising the v31ve seat is Porcibly insertedO
The flat vslve seat 61 and ~ flat sur~Dce o2 defi.ned b~ 8 CirClllar rim are t~e most lmportant parts of the member 6~
The ~am`~er 6, ~uppo.rted by -the tube 5, corlstitutes the ou,,let noz~le end e~tends into th~ secor~d chs~.ber l~, I'he Pl3t ~eat 61 is controlled by the ~13t sur~ce o~ a v~lve eler.l~t 7. A 3prin~ 63 is disposed between th~ circula.r ri~ ~urfac~ 62 and a similar surf3ce 73 provided on the v,~lve ele~nt 7.
The ~pring 6~ keeps tho spherical part of th~ v~lv~ ~le~ent 7 i.n contact with the conical sur~ace ~1 of -the comp~rt~ &o pr~vided in the support 8~ which ir3 made riOid wlth the diDphr,a,gm 2 by ~ea~9 oI the cE~p 20.
Thc low~r ~nd o~ a colltrol spxin5 21 ~' t9 on the cap 2~ lts other end b2i3,s su~20rted by a spring support c~p 22. Thi~ 1.3tter cGmpri ~ con~ral bore 23 ~,rhich housas the conic.31 poi~l t 14 of a he~go~al socket_he~ded screw 13 i~sertel into the thre~ded bo~e 32 whicn t,.r~ar3e3 ~h~ protuberar.ce 33 on the tov OI th3 hou~in~g 30~
~y ~d;~ustinr~r th~ screw 13~ the ~cprinrJr 21 can be pre-lo~dad to 3 ~ n~d ~r31~ T.~ ~h~ d~d b~.r~ e2~ p~rl~ t~ be~o~ t~
CY11t1driC31 col~p~3rt~ant 34 containing the e~.pa~si~n c~p 15, ~.hi~h 6d52~
~71'é!~ ,1 G 3~ jliC.t~ ~3ni: o ~ ',hc? sc7~C~w ~ ~ by url~lu.31if~L3~1 pc~opl~ .
`~iure 2 il.:!u;,' r~JI,e ~ 11 detail ,,~.e vall~e ele~e~lt 7 disposeù in b~ ;S COl~ir3~ bLlen~. ~0 OI` .t;'iOrure 1~
l'he ~a:l.v~ ~sla~tent io con~tl~uteil b~ e spl~ric~l ~art 72 which ~akes contact ~/ith the cone_.~rustu.~ p3rL 31 o~ the compartment ~0 to for.~ cs bcsll and soc'.~et joir.t 9 a I`lat ~sur~'~ce 75 ~.~hich ~. kept faci~ thr f~at se3t 61 defininc, the outllo:~ sec';ion for th~
eXCeS9 fu31~ a flat ~urfaca ~3 of circul3r ril~ shc3 V~ on which the upper end of the ~spring 63 rest , a cylindrical surface 74 which co~3ecto tog~ther the ~ur~aces 73 and ?5 and o~ver which cs fa~J
tUrD~-s of ~he sprin6 63 ~sre forced during a s-tag~c preced~ng -th~
s~ssembly of the co~lete re~sulator, ~s dead bore 75 provided per~endicul~sr to tha rlat surfaca 75, and a cylindl~ical SlbeL~ 7~
WAS1iCS1 extelld~; aboire ..he fl~t ~urFace 71 di~;poseà irl tha~ zone 0f the ele~nent 7 opposite tna surf3ce 75.
The element 7 has an axis of sy~.t~metr~ A-A which co-i~cide~ with ~h~
axe~ of syi~etry o~ the bore 76 and stem 70.
The centre C o~ the epheric~l ~ector 72 i~ contained either in the pla~e 75 or in a plana p~rallel to the plano 75 but displaced dow~wards.
Even though not directly relevant ht?re~ the opsration of s l3res~ure re~ul~tor ~ill be brielly de~cribed~ in order to shot~ the i~portance of di~po~ing the centre o~' rotation C of tile valve ele~ent 7 in the plane 75.
~urlng en~,ine oper.~3tion, -t'ne ~;iPferr~nce b.?-;;ee3l c.~e p~cs~ure n the ~njector iU'?~ feecl p:ipe co3~ ected to t;le centrol chc3;~ber ~ by the tube 12 3nd the pre.~ure in thc int.3ke ~3nif'cla in ~./hich che in~ectcr~
c3re ài~oscr] ~ust rel3-3i.n con~':ent ~or 311 operational ~t.3tes o the ~ !Igine O
1 1~0524 To attain this, the regulator varies the discharge area defined between the surface 75 and the seat 61 of the nozzle 6. Assum-ing that the manifold pressure increases, then in order to maintain said pressure difference constant, the flat surface 75 approaches the nozzle 61 by virtue of the thrust caused by the increase in the pressure acting on the diaphragm 2 on that side facing the chamber 3, in which the pressuxe existing in the manifold is established, as already stated. The consequent reduction in the cross-section for return to the tank causes the pressure in the chamber 4 to increase by a value practically identical to the pressure increase in the chamber 3, so main-taining a constant pressure difference between the injector feed and the intake manifold.
If the manifold pressure falls, then the regulator makes the required adjustment to the injector feed pressure by withdrawing the surface 75 from the nozzle 61 by means of a similar mechanism.
The configuration described here allows both easy construction, as will be illustrated hereinafter, and in increase in the self-stabilising characteristics of the valve element 7, as it is now possible to displace the centre of application of the resultant of the closure forces on the valve element further below the control plane defined by the surface 75, and to displace the re-sultant of the opening forces exerted by the spring 63 resting on the circular rim of the valve element 7 fu~ther above the plane 75.
The invention solves particular production and assembly problems.
The valve element 7 can be produced by machining with automatic 1 160$24 - 6a -machine tools startiny from a cylindrical bar of suitable material. There are various methods for the mass production of the element 7. Two will be described to explain the simp-licity of execution.
l 16052~
~- 7 -'rne f'irst me'4hol coL,~.r S'3 ~h' ~;: of a for~ tool on an automat~c 1 3 i;~13 ~
The ~rofile of ~his tool cor,-*s~o~ds to the fi.,~ure which generales the~ elelnont 7~ exclu~inr tho oore 7~9 ~,~h~n the bar rota4es about the axis of re~olut,ion ~ A.
The bore 76 is .'or~ed by ~ea~s of a drillin~ bit.
The second ~ethod uses a pro~,rrJ.~ lathe w`~lich proceeds by crossad feed to comple4sly de.ine the ele~lent 7.
In order to be+ter understand ths purpose of the r~tel~ 70~ which physically de~i~es ths axis OI sy~matry of the piece 7~ consideration ~ust be ~i~ren to the fact that tn~ rou~ghness of the surfaco 75 ~ust be kept ~ery lo~ for correct op~ration of tll~ re~ latorr To obtain a sur-ace o~ ~ery low -rouc~i~ness, a lappin,~ operation mu3t be carried ou~ on the surface 75 after defininy~ the element 7.
'l'hls ope.ration can b~ carried out on as many ele.~ent3 a3 can b~
contalnad by a sln~le fixture.
~hi~ fixture consist~ of a matal plate in which a plurality o~ bor~
are pro~ided~ each of which can house the stem 70 of the element 7 to ~laintain it~ axi~ of symmetry perpendicular to thc plsn~ of the plat,e. Consequently, ths plane 75 is parallel to the plane of ths pl~te and ~acing ou~ ard~, where3~ the ~'lane 71 abuc~ aOain~t ti plate aul-face.
'.Jith the piQC~ 7 -~ount~d on chi~ plate ~y ~nsert.in3 thr.~ir ste~s '~0 into the reapecti~r-~ ~ore~, a la.l?pinO -t~a'l. iG dri-~e~ rer all th~
~urf`~c.~-~ 7~, :lhiC~ a~ 9 now in a ri,~-,idly po~iti~ned and well definr3d planr~ .
~i`hra ci~oice of the ~hape show~ in l;'i~ure 2 Eor th~ ~al~e elcment 7 ~3kr~ i~ possible to a.,aem`~le the re~u1.~or 1 by aul;or~at~c ~acihi,lea, 5 2 ~
._ r~
;'his is be~ jl;,~ e t}ie '.jOI''_ 75 e~ s the pi.~ro 7 to ~je s.llI;por-cacl bvr !leani~ oi all 3p~ro,0riava a~ o;~ ic L~achi.na f.ixturo d~rir~t.~ ne stag~e OI the a6ioie~b~
This fi~tu~e keeps it C03Xi el to vhe CeSin~ 40, iO ;.~kini~r ir immedi~tely possiblL~ ro I:ind co3~cialit~ betwe~n the hou3ii~g 40 a~d the support ele~,ent ~3~ the cone-frus-tu,i~ C3~rlv~ ol of which i8 isu~ported b~ -the rlnlle~ical surf3ce.72 o. the element 7.
The diaphraO~ 2 thus bveco~e~i correctly positio~ed .~i,,h reGpect to the edg~ 1~1 of the hou~iing l~o.
Tho subsiequent operatlonsi involrin~- the asseL~bly and satting of the sprin¢ 21~ and tle ~sse~lbly and clalnpin~ OI the housin~ 30 by me~ns of the rin6 9 can be i~ediatel~ carried ont in 8 particularl~ imple !nanner.
mhe aforec~oin~-; cle~-icriJt:ion relavesi-vo onl,~r one oF the possi;~
embodi~erltiYi OI- the invention" to t~hich conetruc-tion31 nodificationo can be made withouit leaving the scope o.î tlle inventive ldea.
The sh~pes, di~ension3 ~3nd r~terials used do not limit the ~cope o~ the invention.
. .,
Claims (5)
PERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pressure regulator for injection systems of controlled ignition internal combustion engines, comprising a metal casing, a diaphragm disposed in the casing to divide its interior into a first and second chamber, a first pipe connected to the casing to connect the first chamber to the intake manifold, second pipes connected to the casing to connect the second chamber to a fuel feed pump and to injectors, and a fourth pipe connected to the casing at the return nozzle, which extends into the second chamber so that this latter becomes connected to the fuel tank, and is provided with a flat seat on which flow shut-off and control means for the fuel retuning to the tank act, said shut-off and control means comprising a valve element defined by a spherical part and a flat surface, said valve element having a defined axis of symmetry and housing compartment provided in a support rigid with the diaphragm, in said compartment the valve element being free to rotate in order to keep its flat part facing the flat seat of the nozzle, characterised in that said valve element comprises a dead bore which extends towards its interior from the flat surface, and a cylindrical stem which extends outwards form the side opposite the flat surface, the axes of symmetry of said bore and of said stem coinciding with each other and with the axis of symmetry of the valve element, resilient means being provided in order to urge the spherical part of the valve element into contact with the walls of the compartment, and said flat surface being defined by either a diametrical plane of the spherical surface or a plane parallel to the diametrical plane and displaced slightly towards the cylindrical stem.
2. A pressure regulator as claimed in claim 1, characterised in that the valve element comprises a cylindrical part and a flat surface in the form of a circular rim, said cylindrical part being arranged to support a few turns of a spring the upper end of which rests on said circular rim surface, the base of the cylindrical part being constituted by said flat surface which collaborates with said flat valve seat in order to control the flow rate of the fuel which returns to the tank.
3. A pressure regulator as claimed in claim 1, characterised in that the surface, on which the resilient means rests, lower-ly bounds the spherical sector and lies in a plane parallel to the diametrical plane and displaced towards the stem from the plane which contains the centre of the spherical surface.
4. A pressure regulator as claimed in claim 1, characterised in that the resilient means which urges the valve element into contact with the walls of said compartment is supported at its lower end by a flat circular rim-shaped surface. forming part of the return nozzle member.
5. A pressure regulator as claimed in claim 1, characterised in that said valve element comprises a second flat surface parallel to the flat shut-off and control surface, said second flat surface being surmounted by said cylindrical stem.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT03448/80A IT1135853B (en) | 1980-06-13 | 1980-06-13 | PRESSURE REGULATOR FOR INJECTION SYSTEMS OF INTERNAL COMBUSTION ENGINES WITH COMMAND IGNITION |
| IT3448-A/80 | 1980-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1160524A true CA1160524A (en) | 1984-01-17 |
Family
ID=11107554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000370806A Expired CA1160524A (en) | 1980-06-13 | 1981-02-13 | Pressure regulator for injection systems of controlled ignition internal combustion engines |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5715169A (en) |
| KR (1) | KR840001496B1 (en) |
| AR (1) | AR223778A1 (en) |
| BR (1) | BR8101953A (en) |
| CA (1) | CA1160524A (en) |
| DE (1) | DE3107215A1 (en) |
| ES (1) | ES502996A0 (en) |
| FR (1) | FR2484546A1 (en) |
| GB (1) | GB2078344B (en) |
| IT (1) | IT1135853B (en) |
| NL (1) | NL184435C (en) |
| PL (1) | PL133900B1 (en) |
| SE (1) | SE447668B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307241A1 (en) * | 1983-03-02 | 1984-09-06 | Robert Bosch Gmbh, 7000 Stuttgart | AGGREGATE FOR PROCESSING FUEL, ESPECIALLY FROM A STORAGE TANK FOR THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
| JPS6015963U (en) * | 1983-07-12 | 1985-02-02 | 株式会社 京浜精機製作所 | liquid fuel supply device |
| JPH0219655A (en) * | 1988-06-24 | 1990-01-23 | Ind Technol Res Inst | Throttle valve of fuel injection system of gasoline engine |
| JPH0261182U (en) * | 1988-10-28 | 1990-05-07 | ||
| IT1223939B (en) * | 1988-11-25 | 1990-09-29 | Weber Srl | PRESSURE REGULATOR FOR THE FUEL CIRCUIT OF A FUEL SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
| JP3943852B2 (en) * | 2001-03-21 | 2007-07-11 | 株式会社テージーケー | Pressure control valve |
| JP4022855B2 (en) * | 2002-01-11 | 2007-12-19 | 株式会社デンソー | Solenoid valve device |
| EP2003379A1 (en) * | 2007-06-12 | 2008-12-17 | Luxembourg Patent Company S.A. | High pressure diaphragm valve with exchangeable seat assembly |
| JP5083238B2 (en) * | 2009-02-02 | 2012-11-28 | 株式会社デンソー | Fluid precision on-off valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1532215A (en) * | 1974-11-16 | 1978-11-15 | Lucas Electrical Ltd | Pressure regulating valve |
| DE2551340C3 (en) * | 1975-11-15 | 1979-03-08 | Robert Bosch Gmbh, 7000 Stuttgart | Air valve for a fuel injection system |
| IT1105856B (en) * | 1978-02-07 | 1985-11-04 | Weber Edoardo Spa Fabbrica | PRESSURE REGULATOR FOR INJECTION SYSTEMS OF INTERNAL COMBUSTION ENGINES |
| IT7853091V0 (en) * | 1978-03-20 | 1978-03-20 | Fiat Spa | FUEL PRESSURE CONTROL VALVE SUPPLIED TO THE INJECTORS OF AN INTERNAL COMBUSTION ENGINE |
| DE3136432C2 (en) * | 1981-09-14 | 1983-08-04 | Kioritz Corp., Mitaka, Tokyo | Heater for the handle of a chainsaw |
-
1980
- 1980-06-13 IT IT03448/80A patent/IT1135853B/en active
-
1981
- 1981-02-12 NL NLAANVRAGE8100675,A patent/NL184435C/en not_active IP Right Cessation
- 1981-02-13 CA CA000370806A patent/CA1160524A/en not_active Expired
- 1981-02-19 KR KR1019810000531A patent/KR840001496B1/en active
- 1981-02-26 DE DE19813107215 patent/DE3107215A1/en not_active Withdrawn
- 1981-03-25 FR FR8105979A patent/FR2484546A1/en active Granted
- 1981-04-01 BR BR8101953A patent/BR8101953A/en not_active IP Right Cessation
- 1981-05-12 JP JP7208781A patent/JPS5715169A/en active Granted
- 1981-05-15 GB GB8115002A patent/GB2078344B/en not_active Expired
- 1981-06-10 AR AR285661A patent/AR223778A1/en active
- 1981-06-12 SE SE8103713A patent/SE447668B/en not_active IP Right Cessation
- 1981-06-12 PL PL1981231662A patent/PL133900B1/en unknown
- 1981-06-12 ES ES502996A patent/ES502996A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| BR8101953A (en) | 1982-01-12 |
| GB2078344B (en) | 1983-11-30 |
| SE8103713L (en) | 1981-12-14 |
| IT8003448A0 (en) | 1980-06-13 |
| NL184435B (en) | 1989-02-16 |
| FR2484546A1 (en) | 1981-12-18 |
| DE3107215A1 (en) | 1982-01-07 |
| PL133900B1 (en) | 1985-07-31 |
| SE447668B (en) | 1986-12-01 |
| IT1135853B (en) | 1986-08-27 |
| JPS5715169A (en) | 1982-01-26 |
| ES8203460A1 (en) | 1982-04-01 |
| GB2078344A (en) | 1982-01-06 |
| PL231662A1 (en) | 1982-01-18 |
| NL184435C (en) | 1989-07-17 |
| AR223778A1 (en) | 1981-09-15 |
| ES502996A0 (en) | 1982-04-01 |
| NL8100675A (en) | 1982-01-04 |
| KR840001496B1 (en) | 1984-09-28 |
| FR2484546B1 (en) | 1984-03-16 |
| KR830005480A (en) | 1983-08-20 |
| JPS642830B2 (en) | 1989-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1160524A (en) | Pressure regulator for injection systems of controlled ignition internal combustion engines | |
| US5113831A (en) | Fuel pressure regulator | |
| DE3607812A1 (en) | PRESSURE CONTROL DEVICE | |
| CA1320096C (en) | Screen and flow regulator assembly | |
| US4197825A (en) | Primer bulb retainer | |
| US2705123A (en) | Economizer unit for carburetor | |
| RU2003127398A (en) | VALVE INJECTOR FOR FUEL INJECTION | |
| US4747760A (en) | Hand-actuatable pump for feed pumps of fuel injection systems for internal combustion engines | |
| US2689533A (en) | Liquid pump | |
| US3082875A (en) | Combined fuel pump and filter assembly | |
| US2969963A (en) | Carburetor | |
| US1327494A (en) | Auxiliary air-valve | |
| US2537347A (en) | Economizer | |
| US3074652A (en) | Fuel injection system | |
| JPS5855348B2 (en) | fuel injector | |
| US1722791A (en) | Fuel-feeding device for internal-combustion engines | |
| US1328235A (en) | Air-valve attachment for carbureters | |
| US1536931A (en) | Fuel-spraying nozzle for internal-combustion engines | |
| US3126158A (en) | Dreisin | |
| US2220949A (en) | Fuel feeding means for internal combustion engines | |
| US2218145A (en) | Gas carburetor | |
| US2957684A (en) | Auxiliary emergency carburetor | |
| US1117682A (en) | Supplementary air-supplying device for automobile-engines and the like. | |
| US696146A (en) | Mixing or spraying device. | |
| GB2051237A (en) | Low Pressure Throttle Body Injection Apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |