Title of Invention


Abstract ABSTRACT The invention in general relates to a hydraulically controlled self actusting ball Valve Delivery System for use on constant speed diese) engines, which do not have an in built electric storage battery to use electronic control. The Bal Valve Delivery Systran oonqxises of a polished sted ball placed directly on to the counter sink provided on the top face cf the barrel of the punqring element The bal is pressed against the seat by a cotrqiression spring, which exerts a pre-defined toad on the ball. The ball gets lifted up and the delivery takes place. when the pressure force inside the pumping element diamber exceeds the stxing force on the ball In the similar way, the ball closes and rests against the baird counter sink, when the pressure force inside the pumping dement chamber drops below the spring force. A bronze gasket mid a mbber o-ring tales care of the high pressure and low pressure sealing requirements respectively of the Delivery System.
Full Text

This invention in general rdaites to the sdf actuating, hydraitically controlled Ball Valve Ddivery S^;tan in FUel Ihjecti PRIOR ART:
A conventional Delivery Valve (DV) system has two componcftfs, nandy valve body and valve pin. In a fued injection pump, the DV bocfy talces a seating on the ground and lapped flat surface of the element band cotlar ntd there by ensires a hard meta! fat^ fn-essure sealing The vatve pin has four flutes in the guide shafto as to provide a separtfe passage fiM- the flow of fiid. The pin by virtue of guide shaftves freely in Uie valve body. The pin has a variable lengh retraction collar, vrfiich is ground to an accurate diameter, mtfchii^ perfectly wth the vatve botfy diamder. Ttie radial durance between the valve body & vdve fan are of the mder of 2-4 niawis. In tlie Vdve pin, above the rdief collar, there is a conical ground suiface which takes seating on to die vatve body and provides the perfect seating The valve pin is always pressed on to its seat on the valve body by a weak compression spring When die pressure of the fiuel in the Pump dement chamber exceeds the opening i»-essure of tlie Vdve pin (Force exerted by the spring), the valve ptn liAs up and dlows the fud to flow into the H^ Pressure Pipe (HPP) aid Injector. After the end of injection, the [n-essuredrops down, the nozzle in the iryector closes and the fiid starts flowing t»ck towards the elemat, pushmg the vdve pin to the valve seat The pressure build -up due to the sudden closure of the valve pin and the possible secmid time injection will be avoided by the addkiond space treded by the re(raction collar in the DV diamber diring the closure of the pia

A &el it^ection pawp is used fin- ddiverirtg the desired qiaxiityc^ Uems of cavitati In constart ^>eed diesd engines used for water pumpo^ and small powo-generation, the delivery valve serves mainly as a one way valve aid the retractian vohime has no mqor rdevanoe in determining the hydraulic betuviOT. By appr OBJECT OF THE INVENTION i
The main object of the invention is to invent a sini|rie and compact ddivery valve system without using dectrical and electronic actuatkm. so ^ to ofior an eoonwnic Fuel iiyection pun^ fix constant speed diesd engine ^plications. The invention is based on the [sincipl e of using the hydiauli c ts'essure ftn* the actuation.
ft is another object of the inventi(»i to invot a single bell valve ddivciy syaton that achieves flie diminalitHi of ddivoy valve and there by hdps in reducing the over all height
A sdf actu^ng hydraulically coitroUed Ball Vdve Ddivcay System in FUd injection Pumps for use OD nxistarA speed diesd engines, u^iich tre not equipped with dectric storage battoy, onnprising of;
- a bmrd (3) of the pumping detneit adapted with a counter side (4) on the top ftce to act as a seat for a bd),
- a hardened and polished sted ball (1), seated in the band KH) couito* stidc,
- a concession sfHing (2) placed directly above the said ball (IX
- 8vdvehoider(S)havingexternaitlffeadsnBtchingwiththeintcrnalUreadsafthe punp h(»]sing (8),
- ahighpressure bronze g^ketseding CO between the baird of thefHinvingelexnoit and the valve holder
- a low {H-esare rubber O-^i^ sealing (6) between die vdve holder and die pump
chararterised in that said bdl is lilted up to rni open position soon after the fiid presaire devdoped in the pun;} donent diamber (9) exceeds the force exerted by the said ctunpression spring (2), whereby the compressed fud flows around the dearince between the said bdl andthe inner bore of the vdve holder (10),
the sud ball moves down to ttie dose posUton once the fiid pressure iiuide the pump demot chmnber (kops bdow ttie fc»ce exerted by the said spring, thereby stopping the How of fud.

The ball valve delivery system as par the invmtton consists of a hardened and polished sted bril. the said stee) ball tdces a sealing directly in to the cMinter sak nude on the top of the b«rd of the [ximp demat. The said steel ball is qxing - loaded to ensure that 11% fiiel flow takes i^ace in uni-direction, that is fixun demert chamber towards the valve holder and tiot vice versa. In the new invoition, the effect of rdief volume will be achieved by the niodificati A simple ball valve is provided for use on a craE^ant speed diced ei^inee, to achieve tf» ncMi-retum function of the conventional ddivery valve system. As fllustrated m Fig. 2, the ball valve assemUy comprises of a hardened and polished d^d ball v4ach k spring loaded Tht said ball is accommodated in the eourter sink provided on die top of the baod of pump dement A com|»v^on spring placed directly above the said ball holds the said ball down until ^ pressure in element diamber CKceeds a {nre-defined levtA. Ihe valve holder has got extant ttreads and the pump housing h^ matdiing internal tiveada The bard is pressed against its seat in the pump hmsing when the vdve bolder is tightened to Uie specified torque levd into the pump hnising- The o-riqg [rovided on the valve holder will ensure that there is no leakage of &el bdween the threads of valve holder and the pump housing The brraize gasket placed bctvraen tltt vd ve holder and the dement ban-d gets squeezed and jHOVides perfect sedii^ when the valve holder is screwed on to tlw housing tha-e by in'events the loss of hi^ pressire generated. Thffe is adequate flow 8re& incoiporated between the said ball tnd die fauur bore of the valve holder so that the flow of presairised fiid takes place smoofiily and wtthout throttlBig.

As sudt the said Ball Vdve system accordng to the invmtton herein ensures the non¬return function of a con^%nti(»iat delivery valve, while avoiding the need of complicated sub-assemtdy and further reducing mderial wastage, reducing tt» size of fuel iiyection pun^, towering the cost of produ(Ai(»i and maintenuice and lessenii^ the production time and expertise. The retraction vdume effect, if required f(»- a specific en^ne ^plicati As per the invention, a Bdl Valve Delivery System for use on a constari speed diesel engine as a uni-directional valve, diminating the need of separate sub-assembly of ddivery valve and c(»iq>rising :-
a bmrel (3) of the fHimping detaat twovided with a o a hardened and polifhed Eted ball (1), setf ed in the tnnvl tc^ counter siidc,
a comfression ^ng (2) placed directly above the said ball (1) and gMided in the valve haldN inner boe.
a valve bolder (5) havii^ extonal threads vt^ch match with the internal threads cf the cast iron pump housing (8),
a bronze gasket (7) between ftie band of the pumping dement and die valve holder to provide tagh pr^sure sealti^
a 0-ring sesling (6) betwetm the valve holder and the pun^ hmang to avoid lediage of low pressure fiwl between the threads.

Fig 1 ^lows a conventional ddivoy vdve sjfstemused inFtid injection pumps.
Fig 2 shows a s^ actuating hydrailically omtrolled Ball Valve Delivery syston in fiid ii^cti(»i pumps as per the inventitm.
As per the invention from Fig. 2 the Ball valve delivery i^stcm ccnqirises of a hardened and polished sted ball (1) seated in the counter ank (4) jHovided in the barrd (3) placed in the punp housing (8). A conqression qning (2) is placed on top of the said ball holds the said 1^1 tig^y down on to its seat in the barrd utAil the pressure exceeds a pre-defined lerol. The dearatce (10) between the ball and the oettral btx'e in valve holder (5) provides the required lk)w passfige, as soon as the ball lifts up. The said ball moves up, if the pressure in dw pump demoit chamber (9) exceeds the spnng pressure on the said ball. Hi^ pressire scaling between the valve holder and pump housing is assured by the bronze gasket (T). The low pressure ceding between the threaded joints of pun^ housii^ and vdve holder is ensured with the hdp of rubber o^ng (6>
As per file invei^on, the plungpr of the fUd mjeotion pump has the same features as in the known existing ait.

As per the inventicm, tie ddtvcry vi^ve body and the valve pin of the fiiel iiyection IKimp in tiie exi^ng art has been dinuiaUd and rq)laced by a hardened and polished steel b^l of suit^le diameter. Tlw bril diameter will be decided based on the phmger dioneter and the extent of imnwrskm into the pomp element barrd.
As per the inventicm, therefractiiHi volume of 35 or 30 mn? in the ddivery valve system of the existir^ art is completely dinvnated.
As per the inveition, thet^eiing pressure of the foel iiuection pump is same as in the known existii^ art.
As per the invention, the UAal heigtt of Ihe pump from the flangB arface has been reduced from 122 mm to 113 mm.
The distinguishing features of the ball valve delivery system as per the invention has been explained in thefollowingtable:

• Elimination of expensive sub-assembly of delivary valve.
• Simplified pump assenbilily.
• Reduction in overall size of the fud injetion pump.
• Lower cost of the pump.
• Cheaper spire parts and lower maiitenanoe cost.

• Mainly targeted for constant speed diesd engines, which are not equipped with any electric storage battery.
• Minor re-optimisation of the engine's static injection timing requred to compersate the injection advance with a bail valve system, in case of retro- fitment

1) A self actuating hydraulkally cotiolled Ball Valve Ddivery System in Fuel injection Pumps for use on cimstant speed diesel engines, wbich are not equipped with electric storage battoy, conprising of;
- a barrel (3) of the pumping dement adapted with a couiler sink (4) on the top face to act as a seat for a ball,
- a lurdened and polished sted ball (1), seated in the barrel Cop coutter sink.
- a conqff-ession spring (2) placed directly above the said ball (1),
- a valve holder (5) twviqg external threads matching with the iitemal th-eads of the pump housing (S),
- a high pressure bronze gasket sealing (7) between the ban-d of the punning element mid the valve holder
- a low pressure rubber 0-ring sealing (5) betweoi flie valve holder and the pump housing.
characterised in that said ball is lifted up to an open position soon after the fuel pressure devdoped in (he pump dement chamber (9) exceeds the force exerted by the said compression spring (2), whereby the compressed fuel flows around the clearance between the said ball and the inner bore of the valve holder (10),

the said ball moves down to the dose position once the fuel pressure inside the pump element chamber drops below the force exerted by the ssid spring thereby stopping the flow of fuel.
2) A self actualing hydraulically controlled Ball Valve Deliveryvay System in fuel injection pumps as a non-return, unidirectional delivery system for use on constat speed diesel engines, as described in complete specification and accompanying drawings.


1017-mas-2001 abstract.pdf

1017-mas-2001 claims.pdf

1017-mas-2001 correspondance others.pdf

1017-mas-2001 correspondance po.pdf

1017-mas-2001 drawings.pdf

1017-mas-2001 form-1.pdf

1017-mas-2001 form-26.pdf

1017-mas-2001 form-5.pdf

1017-mas-2001description (complete).pdf

Patent Number 196409
Indian Patent Application Number 1017/MAS/2001
PG Journal Number 30/2009
Publication Date 24-Jul-2009
Grant Date 08-Feb-2006
Date of Filing 20-Dec-2001
Applicant Address HOSUR ROAD, ADUGODI, BANGALORE 560 030
# Inventor's Name Inventor's Address
PCT International Classification Number F02M39/02
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA