WO2006032123A1

WO2006032123A1 - Equipment and test method for injection nozzle

Info

Publication number: WO2006032123A1
Application number: PCT/BR2005/000203
Authority: WO
Inventors: Flavio Natalino Lassie
Original assignee: Flavio Natalino Lassie
Priority date: 2004-09-24
Filing date: 2005-09-23
Publication date: 2006-03-30

Abstract

The present summary refers to an invention patent from an equipment and test method of injection nozzle belonging to the field of equipments used in garages, automotive centres and similar and consists: of pneumatic set (1) for opening/closing and watertight test of the dosing valve (100) of the nozzle and the union of the low pressure circuit (150) of it and of the valve (100), of the union of the high pressure cylinder (160) between it and the cylinder (111)-(112); of the mechanical injector (110) and the cylinder (111)-(112); and by electro-electronic circuit of feeding and control and that incorporates the electric device of solenoid test (103) of the dosing valve.

Description

"EQUIPMENT AND TEST METHOD FOR INJECTION NOOZLE"

The present descriptive report refers to an inven¬

tion patent for an appliance and injection nozzle test belonging to the field

of equipments and means used in garages, automotive centres and similar

that have been developed to make tests of opening/closing and of watertight

and electrical activation test of the dosing valve of the diesel injector nozzle.

It is already known a kind of nozzle composed es¬

sentially: by a segment that contains an electric dose valve, a solenoid,

commanded by the electric system associated to the diesel engine; by a sec-

ond segment parallel to the first and that contains a mechanical injector acti¬

vated by mechanical command of the diesel engine; by a transversal seg¬

ment, to an extremity at which is incorporated the dosing valve, an interme¬

diary extension to which is incorporated and crosses the segment that con¬

tains the mechanical injector and the opposite extremity of the transversal

mentioned segment that makes possible an attachment opening on the plac¬

ing point on the engine; this nozzle also makes possible a circuit of diesel oil

inlet at low pressure formed by radial inlets foreseen in the segment that

contains the mechanical injector and extended until the dosing valve; and

feeding circuit for the diesel oil dosed at high pressure, with a segment that

interconnects the dosing valve and the mechanical injector and a segment

that ends at the injection outlet of a diesel oil jet. This injector nozzle is efficient, but its good run¬

ning depends mainly, on the conditions of opening and closing of the dosing

valve and the water tightness of the sealing of the set and the electric start of

the dose valve, among others.

Actually, there aren't means really efficient to test

those parameters of the nozzle, thus when this shows poor running, the re¬

pair is done in a relatively empirical way. This makes it difficult, delays,

gives possibility to errors and makes other problems for the repairing.

Thus the object of this present patent is to supply

with an equipment and test method that overcomes the above inconvenient,

observed with the means of diesel nozzle test of this described type.

Another objective is to supply with a nozzle test

machine on bench, that has simple operation system, efficient and quick.

Another objective is to provide an equipment that

is adequate to fabrication, manufacture and cost having in view its own pur¬

pose. Within this purpose consequently, the problem above mentioned and

with the proposal to overcome it and aiming to solve the related goals, this

nozzle test equipment has been developed, objective of the present invention

patent, which manufacture, running and advantages are based on the at-

tached designs, which: fig I. 1 shows a schematic image of the kind of die-

sel nozzle that is tested by the equipment, taken separately;

fig. 2 shows a diagram of blocks of the equipment

and the indication of how it is connected to the nozzle;

fig. 3 shows a view of the equipment panel;

fig. 4 shows a detail of the adapter of the equip¬

ment, that fixes the nozzle during the test; and

fig. 5 shows a general view of the equipment.

According to what the above related figures illus-

trate, the equipment, object of this present invention patent, is devoted to

make tests of opening/closing and watertight and electric coil test of the dos¬

ing valve of the diesel injector nozzle, which makes part of diesel engine.

The mentioned diesel injector nozzle is of a kind

comprehended, essentially (fig. 1): by segment that contains the electric dos-

ing valve 100; by a second segment parallel to the first and that contains a

mechanic injector 110; by a transversal segment 130, at which extremity is

incorporated the electric dosing valve 100, an intermediary extension is

incorporated and crosses the segment that contains the mechanical injector

110 and the opposite extremity of this mentioned transversal segment fore-

sees opening 131 receiver of an attachment screw at the engine placement

point; this mentioned nozzle still foresees a diesel inlet circuit at low pres- sure 150 with radial inlet valves 151 foreseen in the segment that contains

the mechanical injector 110 and extended to the dosing valve 100; and ad¬

mittance diesel oil circuit dosed with high pressure 160, with segment that

interconnects the dosing valve 100 and the mechanical injector 110 and out-

let segment of the diesel j et.

The dosing valve 100 consists, essentially: of a

chamber 101, to which comes the low pressure circuit 150; of a piston 102

placed in the camera; of a solenoid 103 and a return spring 104, that submit

one extremity of the piston; of a seat 105 crossed by the opposite extremity

of the piston and in which works an extreme flange 102' of the piston; by a

duct 106 derived from chamber 101 and that opens in the seat 105; and by

the circuit 160 disposed on the downstream side of the seat; of a screw 107,

regulating the course of the piston, that closes and defines the extremity of

the chamber 101 opposite to the adjacent of the solenoid 103; and by sealing

rings 108 and 109, that seals the interstices between the screw 107 and the

body of the nozzle and between this and the solenoid 103, respectively, thus

the dosing valve 100 of the kind normally open, so that when the solenoid

103 presents idle, the spring 104 presents distended and the extreme flange

102' presents out of the seat 105, keeping it open, providing pressurized oil

passage to the high pressure circuit 160 and when the solenoid 103 is ener- gized, the spring 104 compresses and the extreme flange 102' moves against

the seat 105 and closes it.

The mechanical injector 110 consists, essentially:

by a chamber HO₅ to which comes segment of high pressure circuit 160

coming from the chamber 101; by a piston 112, one extremity of which is

submitted to a mechanic governor device 113 of the diesel engine and the

opposite extremity disposed in the chamber 111 ; by an outlet duct 114 of the

chamber 111, that makes part of the high pressure circuit and that ends in an

outlet governed by a needle device 115, so that this one; duct 114 and the

radial inlets 151 of the low pressure inlet 150 and initial part of this are

formed in an extreme disassembling segment 170 of the body of the nozzle.

Thus, the present nozzle test equipment as de¬

scribed above (fig. 2) is the kind for bench test and consists, essentially: by

pneumatic set 1 for opening/closing and watertight dosing valve test 100 for

nozzle and low pressure circuit linking 150 of this and of valve 100, the

linking of the high pressure circuit 160 between this and the cylinder 111-

112 of the mechanic injector 110 and the cylinder 111-112; by electro-

electronic circuit 20 of electric feeding and the command of the equipment

and that incorporates solenoid coil test device 103 of the dosing valve; by

adequate body 40, that contains the pneumatic set 1 and the electro- electronic circuit 20; and by an adapter 41 to attach the nozzle during the

test.

The pneumatic set 1 for opening/closing and water¬

tight test consists, essentially, of a pneumatic circuit 2 that have intercalated,

a vacuum pump 3, placed in one of the extremities of the circuit 2 and from

which and placed in series: a retaining valve 4 placed in the end of the pump

and oriented to give passage only in inlet direction of it; opening and closing

valve for reading attachment 5; and pneumatic connection valves and test

selection 6a, and 6b, that link alternatively with the circuits, respectively, of

low 150 and high 160 pressure of the nozzle and placed in the opposite ex¬

tremity of the pneumatic circuit 2; mentioned pneumatic set 1 for open¬

ing/closing and watertight test still consisted: of vacuum gauge 7 connected

rising from the pneumatic circuit segment 2 between the retaining valve 4

and the reading attachment 5 of the kind, preferably, of 1 atm; of relief valve

8, that can be originated from the same segment from circuit 2; mentioned

valves 4, 5, 6a, 6b and 8 are of electric start kind, solenoid, linked to the

vacuum pump 3 are electrically activated and submitted to the electro-

electronic circuit of electric feeding and control 20 of the equipment.

The electro-electronic feeding circuit 20 and the

equipment control consists, essentially: of feeding circuit containing: of cir¬

cuits (trafos) 21 and 22 of electric feeding 5v and 12 v, respectively; turn on/off key23, connected to the electric net and associated with button 23'

located on the side panel of the equipment. Of circuit 24 of electric feeding

of the solenoid 103 for the tests of the dosing valve 100, consisted substan¬

tially of one PCI associated to the feeding circuit of 5v 21 and to electric

connectors, preferably of kind spring clamps (alligator) 25, with connections

in the electric terminals of solenoid 103. Of feeding and governor circuit of

the electric components of pneumatic circuit 2, consisted essentially of one

PCI and temporizer relays 26 associated to the feeding circuit of 12v 22; to

the vacuum pump and to the valves 4, 5, 6a, 6b and 8 of the pneumatic cir-

cuit2; mentioned valves 6a and 6b associated to the respective selection but¬

tons 6a', 6b' located on the frontal panel of the equipment, so that button 6a'

has two positions 1 and 2 to start and button 6b' two positions 3 and 4 to

start. Of command and interaction circuit with the operator consisted by the

association: of start key 27 of the start electric test of the solenoid 103 of the

dosing valve 100 (start); of automatic command 28 of electric feeding com¬

mutation non-pulsed to make the opening/closing test and dosing valve wa¬

tertight 100 of the nozzle; of key 29 to cancel the time (reset); of key 30 to

cancel the test; mentioned keys are connected to buttons, respectively, 27',

29', 30' of the frontal panel of the equipment; mentioned circuit still con-

tains: digital dial of test time and test reading 31b: lamp 32a indicating coil

test, connected in parallel to the connectors circuit 25; lamp 32b watertight test indicator (pressure); and lamp 31c of time reading of the watertight test

and end of injector test (analysed injector).

The solenoid coil test device 103 of the dosing

valve, mentioned above, incorporated to the electro-electronic circuit of

feeding and control 20 consists, substantially, thus, by the association: of the

electro-electronic feeding circuit and control 20 qualified for electric pulsed

feeding, what occurs naturally when mentioned circuit is turned on through

key 23 (default); of the feeding circuit of 5 V 21; circuit 24 of the electric

feeding of solenoid 103; connectors 25; key 27 of solenoid electric test start;

and lamp 32a indicator of the coil test.

Logically, the electro-electronic feeding circuit and

command 20 foresees usual devices in electric circuits, as protection devices

and others.

The lateral panel 33' of the equipment (fig. 5) has

assembled the button 23 turn on-turn off. The frontal panel 33 (fig. 3) has

assembled the buttons: 6a' and 6b' for selection of the low circuit 150 and

high 160 pressure to be tested and provided with the start positions 1,2 and

3,4 respectively; buttons 27 of electric solenoid test start; 29' of time con¬

cealing (reset); 30' of test concealing; digital dial 31a of charge counting

time; digital dial 31b of test time counting or of reading time test; signaliz¬

ing lamps: 32a indication of accomplishment of coil test; 32b of indication of accomplishment of watertight test; and 32c reading time test and end of

test (injector analysed).

The adapter 41 for nozzle attachment during test

(fig. 4) consists, essentially: of a receptacle 42 enough to receive the extrem-

ity of segment 170 of the body of the nozzle in which circumference and

centre open the circuits, respectively, of low 150 and high 160 pressure; of a

rubber seat 43 that is placed inside the receptacle 42 and provided with pe¬

ripheral electric passages 44 and axial 45, that open, respectively, in periph¬

eral surrounding channel 46 and central projection trunk-conical 47 from the

upper face of the seat, to which are attached the extremities of the low cir¬

cuits 150 and high 160 respectively, and oppositely mentioned passages 44

and 45 are connected to valves 6a and 6b and governed by them; mentioned

adapter 41 still consists of a quick clamp device through cams activated by

gauntlets 48 for attatchment of extremities of the nozzle, in which open the

circuits of low 150 and high 160 pressure, inside the receptacle 42 and cou¬

pled to the peripheral channel 46 and central projection 47.

The body 40 of the equipment is preferably accord¬

ing to illustrated on figure 5, consists of an essentially prismatic body pro¬

vided with anterior face in step 49, which inferior step supports adapter 41,

of vertical surface adjacent to that step derives the electric connectors set 25,

above the mentioned surface extends inclined surface that contains the command and supervisor panel 33 and other adequate surfaces of the body

derive electric connection cables to the electrical connection to the net; con¬

nection for the pneumatic circuit; defines the lateral panel 33' and other.

The equipment this way manufactured works in the

following way (fig. 1): firstly, the segment 170 of the injector nozzle to be

tested is disassembled in a way that the low circuit extremities 150 and high

160 pressure remain uncovered. The nozzle is assembled on the test bearer

41. the electric connectors 25 and the pneumatic connection valves and test

selection 6a, 6b of the equipment are connected, respectively, to the electric

terminals of solenoid 103 and to the extremity of segment 170 of the body of

the nozzle, in which open the extremities of the low circuit 150 and high 160

pressure.

The first test to be performed is the electric test of

the solenoid coil 103. in these conditions, once attached the nozzle to the

equipment, the turn on-turn off key 23 and the test start key of the solenoid

27 are activated by the operator, and the coil test lamp turns on; and the so¬

lenoid 103 starts receiving electric pulsed feeding.

In normal conditions, the coil test lamp 32a starts

blinking and the piston 102 of the dosing valve 100 starts oscillating, in a

sense attracted by the solenoid 103 energized and against the force f spring

104 and on the opposite sense by the solenoid 103 non energized and the distension of the spring 104, along which the flange 102' of the mentioned

piston withdraws and approaches and hit alternatively on the body 105 mak¬

ing a characteristic sound (tek, tek, tek), that is heard by the operator of the

apparel. The occurrence or absence of this characteristic sound of the dosing

valve 100 in connection with the blinking of the coil test lamp 32a of the

equipment allows the operator to evaluate the electric condition of the coil in

the dosing valve 100, so that:

I)- Lamp 32a blinking and no characteristic sound

of the coil implies that it has defect, for example, with the piston blocked,

interrupted coil;

2)- Lamp 32a turned off implies in short circuit;

and

3)- Lamp 32a blinking and presence of characteris¬

tic sound implies in normal coil conditions.

At the end of the electric solenoid test, the operator

of the equipment activates the buttons 6a' and 6b' to select low or high pres¬

sure test (positions 1 of the button 6a' and position 4 of button 6b' for the

low test or positions 2 of button 6a' and position 4 of button 6b' for high test

pressure) and the equipment enters in wait. From this part the operator acti-

vates button 30, through which the equipment starts to provide non pulsed

feeding for the solenoid 130, selecting this way the opening/closing and wa- tertight test, that requires this kind of feeding. With this, the solenoid 103 of

the dosing valve 100 dislocates and fastens piston 102 against the force of

the spring 104 places flange 102' of the piston in the position that closes the

body 105, isolating the low pressure circuit 150 from the high pressure cir-

cuit 160 of the injector nozzle. The valve, for example, 6a of pneumatic

connection and test selection of the low pressure circuit 150 (fig. 4) is acti¬

vated and makes the connection of the pneumatic circuit 2 of the equipment

to the low pressure 150 to be tested from the nozzle automatically the valve

6b of the high pressure circuit 160 opens it for to the environment. Done

this, the test begins. The vacuum pump 3 is started and the valves: retaining

4; reading attachment 5; selection 6a (that has been selected); relief valve 8

and dosing valve 100 of the nozzle are put or kept in positions: open, open,

open, closed, closed, respectively.

The control and feeding electro-electronic circuit

20 counts one Vacuum Charge Time, along which the vacuum pump 3 is

kept n; the valves 4, 5, 6a, 8 and 100 maintained in the initial positions

(open, open, open, closed, closed, respectively); the vacuum gauge 7 keeps

recording progressively the levels of vacuum reached; and the specific time

digital dial 31a shows the advance of the Vacuum Time Charge. At the end

of this time, the pneumatic circuit 2 of the equipment and the low circuit

pressure 150 (selected for test) of the nozzle reach the adequate vacuum level for test, that is registered in the vacuum gauge 7 and automatically by-

action of the control circuit 20, the vacuum pump 3 is turned off; the retain¬

ing valve 4 is closed and the test indicator lamp 32b is turned on.

From this moment on, the control circuit 20, starts

to count a Time Test, show on the specific dial 31b and along which the

vacuum gauge 7 keeps the initial register of vacuum or oscillates until a lit¬

tle or much below, accusing thus watertight conditions, respectively, normal

or with leaking inside the acceptable parameters or abnormal for the low

pressure circuit 150. at the end of the Time Test, the control circuit 20 auto-

matically closes the valve of reading attachment 5, through which the auto¬

matic circuit communication 2 of the equipment with the low pressure cir¬

cuit 150 of the nozzle is interrupted and the vacuum gauge 7 attaches to the

registered reading at the end of the Time Test, providing thus conditions for

reading by the part of the operator of the equipment. Simultaneously, the

control circuit 20 turn off the test indicator lamp 32b and turns on the test

reading lamp 32c and the digital dial 31b counts a Reading Time.

At the end of the Reading Time, the control circuit

20 automatically opens the relief valves 8 and reading attachment 5, "break¬

ing" the vacuum in the low circuit pressure 150 of the nozzle tested and in

the pneumatic circuit 2 of the equipment, disposing it in conditions for a

new operation. Notice that in the opening/closing test and low

pressure circuit watertight 150 vacuum is formed in the segment of this cir¬

cuit extended between its extremity, located on the extremity of the seg-

mentel70 of the injector and the chamber 101 of the dosing valve 100; in

the chamber 101; in the interstice between the solenoid 103 and the injector

body sealed by the ring 109; in the duct 106; that connects the chamber 101

to the body 105; in the interstice between it and the flange 102' at the side of

the mounting of the body 105; and in the interstice between the course ad¬

justment screw and 107 and the injector body sealed by ring 108. Thus,

when the opening/closing and watertight test of the circuit of low pressure

150 is made, as above mentioned, what is really being tested is the flange

102', the body 105 of the side of the mounting and the sealing rings 108 and

109; once that those components are perfect or damaged will cause, respec¬

tively, the maintenance or fall of the vacuum in the circuit, that is detected

by the equipment, indicating thus, in case of vacuum fall to abnormal levels,

the need of the repair or change of damaged parts.

To make the high pressure circuit test 160, the op¬

erator selects the valve 6b of pneumatic connection and selection of high

pressure test, through buttons 6a' and 6b' of the panel in the adequate posi-

tions (button 6a' and 6b' in position 4). From this step follow all the pro¬

ceedings for the low pressure circuit test only with the difference that the pneumatic connection valve and the selection of test 6b connects of high

pressure 160 to the pneumatic circuit 2 of the equipment and the low pres¬

sure circuit 150 remains open to the environment.

In these conditions, when the equipment is acti-

vated, vacuum is formed in the chamber 111, in the interstice of piston 112

and the body of the injector; in the segment of the high pressure 160 be¬

tween the chamber 111 and the chamber 101 of the low pressure 150 and in

the interstice of flange 102' and the body 105 by the downstream side of it.

This way the watertight is tested between the piston 112 and the passage of

the nozzle body in which it moves and the watertight between the flange

102' and the body 105 by the downstream side of it, this is to say, the re¬

ferred piston 112, the surface of the injector body where it moves, the flange

102' and the seat 105 by its downstream side, once if these components are

perfect or damaged will cause, respectively, the maintenance or vacuum fall,

that is detected by the equipment and, in case of damage, the indication of

change or mend of the affected parts.

The equipment, according to its manufacture and

running above describe, implements, thus, a method for test accomplish¬

ment, consisted of the following stages:

I)- Demonstrate the extremity 170 of the nozzle

body, to expose the extremities of the circuit of low 150 and high 160 pres- sure of the nozzle and assemble mentioned nozzle, without referred segment

170 and through mentioned extremity that contains the extremities of the

circuit 150, 160, in adapter 41 of the equipment;

2)- Turn on the low circuits 150 and high 160 pres-

sure of the injector nozzle into pneumatic circuit 2 of the equipment;

3)- Turn on the terminals of solenoid 103 of the

dosing valve 100 of the injector nozzle into electro-electronic terminals of

feeding and command 20 of the equipment; and accomplish:

I)- Test method of electric part (coil) of solenoid

103 of the dosing valve 100 of the nozzle consisted of the stages of:

Ll)- Feed with electric pulsed feeding one test

lamp 32a of the equipment; and the solenoid 103 of the dosing valve 100 of

the nozzle so that, in normal conditions of the solenoid 103, the test lamp

blinks and solenoid 103 and the spring 104 oscillate the piston 102 against

the seat 105 of the dosing valve 100 to produce characteristic sound heard

by the test operator;

II.2)- associate the occurrence or no occurrence of

the characteristic sound of the dosing valve 100 and the blinking of the test

lamp of coil 32a to detect the occurrence or no occurrence of defect of the

electric part, solenoid 103, of the dosing valve 100, so that: I)- Lamp 32a blinking and no characteristic sound

of the coil implies that it has defect, for example, with the piston jammed,

interrupted coil;

2)- Lamp 32a turned off implies in short circuit

coil; and

3)- Lamp 32a blinking and presence of characteris¬

tic sound implies in normal coil; and

H)- Method for opening/closing and watertight test

of the dosing valve 100 and the junction of the low circuit pressure 150 of it

and valve 100, of the junction of the high pressure circuit 160 between it and

the cylinder 111-112 of the mechanical injector 110 and the cylinder 111-

112 consisted essentially, of:

ILl)- Stage to accomplish opening/closing and wa¬

tertight test, optionally, first of all, in the dosing valve 100 and in the junc-

tion of the circuit of low pressure 150 of it, concerning:

II.1.1)- Feed automatically the solenoid 103 of the

dosing valve 100 of the injector nozzle with electric feeding non pulsed,

through the equipment, so that piston 102 of the dosing valve 100 closes the

seat 105, isolating of low pressure circuit 150 from the high pressure circuit

160 of the nozzle; II.1.2)- Activate keys 6a⁵ and 6b' of the equipment

in respective positions 1 and 4, to select for test the low pressure circuit 150

of the nozzle through the connection valve and adequate selection 6a or the

equipment, that connects mentioned circuit of low pressure 150 to the

pneumatic circuit 2 of the equipment, at the same time that the other connec¬

tion valve and adequate selection 6b of the apparatus maintain the high pres¬

sure circuit 160 open to the environment;

II.1.3)- Charge the pneumatic circuit 2 of the

equipment and the low pressure circuit 150 selected from the nozzle with

adequate vacuum level test, through vacuum pump 3 of the equipment, kept

turned on for determined Vacuum ;charge Time, shown and signalized by

the equipment;

II.i.4)- Measure gradually the rise of the vacuum in

the pneumatic circuit 2 of the equipment and low pressure circuit 150 of the

nozzle, through vacuum gauge 7 of the circuit 2, until the adequate vacuum

level test and in it inhibit the vacuum generating source, pump 3 of the

equipment nd close the retaining valve 4 and turn on the I test indicating

lamp of the equipment;

II. 1.5)- Maintain the pneumatic circuit 2 of the

equipment and the low pressure circuit 150 of the injector nozzle under vac¬

uum during determined Test Time, shown and signalised by the equipment and maintain the vacuum measurement through vacuum gauge 7 during the

test Time;

II.1.6.)- At the end of Test Time, turn the indicat¬

ing test lamp off, turn on the reading lamp and close attachment reading

valve 5, isolating the pneumatic circuit 2 of the equipment of low pressure

150 of the injector nozzle attaching the vacuum level register of the vacuum

gauge 7, so that the operator can read, at the end of the reading time, turn the

lamp off, and open the relief valve 8 of the equipment, alleviating the pres¬

sure in the circuits and giving conditions for a new test;

II.1.7)- Interpret the eventual maintenance of the

test vacuum level or the vacuum fall to normal level measured by the vac¬

uum gauge during Test Time as normal condition or defect of the rings 108

and/or 109 and/or of the flange 102' and/or of the seat 105 of the mounting

side of the circuit of low pressure 150 of the dosing valve 100 of the injector

nozzle; and

II.2)- Stage to make the opening/close and water-

tight test in the valve 100, in the junction of the high pressure circuit 160

between it and cylinder 111-112 of the mechanic injector 110 and in the cyl¬

inder 111-112 of the injector nozzle, concerning:

II.2.1)- Activate keys 6a' and 6b' of the equipment

in positions respectively 2 and 4, to select for test the high pressure circuit 160 of the nozzle through the connection valve and adequate selection 6b,

that connects mentioned circuit 160 to the pneumatic circuit 2 of the equip¬

ment and the adequate valve 6a, that simultaneously maintains the low pres¬

sure circuit 150 open to the environment;

II.2.2)- Charge the pneumatic circuit 2 of the

equipment and the high pressure circuit 160 selected from the nozzle with

vacuum level adequate test, through vacuum pump 3 of the equipment,

maintained turned on by determined Vacuum Charge Time, shown and sig¬

nalized by the equipment;

II.2.3)- Measure gradually the vacuum rise in the

pneumatic circuit 2 of the equipment and high pressure circuit 160 of the

injector nozzle, through vacuum gauge 7 of circuit 2, until the adequate vac¬

uum level test and in it inhibit the vacuum generating source, pump 3 of the

equipment and close the retaining valve 4 and turn on the test indicating

lamp;

II.2.4)-Maintain the pneumatic circuit 2 of the

equipment and high pressure circuit 160 of the injector nozzle under vacuum

during determined Test Time, shown and signalized by the equipment and

maintain the vacuum measurement through vacuum gauge 7 during Test

Time; II.2.5)- At the end of Test Time, turn the test indi¬

cating lamp off turn on the reading lamp and close the reading attachment

valve 5, isolating the pneumatic circuit 2 of the equipment of the high pres¬

sure 160 of the injector nozzle and attaching the vacuum level register of

the vacuum gauge 7, so that the operator can make the reading, at the end of

the reading time, turn the reading lamp off and open the relief valve 8 of the

equipment, alleviating the pressure in the circuits and giving conditions for

an new test;

II.2.6)- Interpret the eventual maintenance of vac-

uum test or the fall of the vacuum level to normal level or the fall of the

vacuum to abnormal level measured by vacuum gauge 7 during Test Time at

normal condition or defect in piston 112 and/or in the passage of the body of

the nozzle in which it moves; and/or of the flange 102' and/or in the seat

105 at the downstream side of it and of the high pressure circuit 160.

The method can still contain stages: III)- Of issue

relative report to the identification data o the tested nozzle; data of test re¬

sult; data of eventual repairs done to the nozzle and other through computer;

IV)- Of filing mentioned reports through printing ways and/or electronic

and/or other; V)- Of transmitting mentioned reports to a remote place

through internet or similar, for the quality control of the nozzle and its com¬

ponents. Thus the present method and equipment solve the

problem relatively to the making of injector diesel nozzle test, facilitating

eventual repairs to be done in it.

On the other hand, according what can be under-

stood of the description of the making of the above tests, the present test

equipment is of simple and rapid usage for the operator serving thus to the

need of adaptation of labour of even low specialization and agility required

by the garages, automotive centres and other where it can be used.

Still, the present equipment presents as a factor that

facilitates its usage to the purpose that it is designated the fact that it has

relatively simple construction and manufacture and consequently an ade¬

quate cost for acquisition for the interested public.

The present equipment still presents as an advan¬

tage a relatively low operation cost, which connected to the acquisition cost

makes it economically adequate to the purpose that it is destined.

Inside the basic manufacture, above described, the

equipment, object of this present invention patent, can present modifications

relatively to materials, dimensions, manufacture details and/or functional

configuration and/or ornaments and/or the stages of the making method of

the test, but not deviating from the extent of the solicited protection. Within this, though the equipment and method

have been described making test of and diesel injector nozzle with charac¬

teristics according to above described, mentioned equipment and method

can be altered to adapt to other kinds of diesel nozzle injectors, substantially

similar to the above described or other.

Claims

ClaimsI)- "INJECTOR NOZZLE TEST EQUIPMENT", this kind for diesel oil,used in diesel oil engine and consisted essentially: by segment that containsthe electric dosing valve (100); by a second segment parallel to the first thatcontains a mechanical injector (110); of transversal segment (130) to thoseand of seating on the engine; of inlet diesel oil of low pressure (150); of oildiesel feeding circuit dosed of high pressure (160); mentioned injector pro¬vided with body with extreme removable segment (170) and (160) and thatwhen removed leaves its extremities uncovered or similar: referred equip-ment is the kind for bench test, characterized essentially: by a pneumatic set(1) of opening/closing and watertight dosing valve test (100) of the nozzleand the union of the low pressure circuit (150) of this one and the valve(100), of the union f the high pressure circuit (160) between it nd the cylin¬der 111)-(112) of the mechanical injector (110) and the cylinder (H l)-(112); of electro-electronic circuit (20) of electric feeding and equipmentcontrol and that incorporates device for solenoid coil test (103) of the dosingvalve (100); and by adapter (41) that attaches the nozzle during test; men¬tioned pneumatic set (1) for opening/closing and watertight test consists,essentially, of pneumatic circuit (2) that has an extreme vacuum pump (3)and from the same and placed in series: a retaining valve (4) placed in theoutlet pump and adjusted to give passage only in the sense of the inlet of it; opening/closing valve for reading attachment (5); and pneumatic connexionvalves and test selection (6a) and (6b), that connect the pneumatic circuit (2)alternatively with the circuits, respectively, of low (150) and high (160)pressure of the injector nozzle ; of vacuum gauge (7); and of relief valve (8)that can be derived from segment of circuit (2) and valves (4), (5), (6a), (6b)and (8) are of electric activating kind, solenoid, and together with the vac¬uum pump (3) remain electrically turned on and submitted to the electro-electronic circuit of feeding and control (20) of the equipment.2)- 'INJECTOR NOZZLE TEST EQUIPMENT", according to claimed in1, characterized by circuit electro-electronic (20) of feeding and control ofthe equipment consisted, substantially: of feeding circuit consisted: of cir¬cuits (trafos) (21) and (22) of electric feeding in 5v and 12v, respectively,and of turn on/turn off key (23); connected to the electric net and associatedto a button (23)', located on the panel of the equipment.3)- "INJECTO NOZZLE INJECTOR TEST", according to claimed in 2,characterized by electro-electronic circuit (20) of feeding and control of theequipment consist, substantially: of circuit (24) of electric feeding of the so¬lenoid (103) for the dosing valve (100) tests, consists substantially of a PCIassociated to the feeding circuit of 5v (21) and to electric connectors, pref-erably of spring clamps kind (alligator) (25), of connections in the electricterminals of solenoid (103). 4)- "INJECTOR NOZZLE TEST EQUIPMENT", according to claimed in 3,characterized by the circuit electro-electronic (20) of feeding and control ofthe equipment consists, substantially: of circuit of feeding and control of theelectric components of the pneumatic circuit (2), consisted substantially ofone PCI and temporizer relay (26) associated to the feeding circuit of 12v(22); to the vacuum pump (3) and the valves (4), (5), (6a), (6b) of the pneu¬matic circuit (2); mentioned valves (6a) and (6b) associated to respectivebuttons (6a)', (6b)' of selection, located on the panel of the equipment.5)- "INJECTOR NOZZLE TEST EQUIPMENT", according to claimed in 4,characterized by electro-electronic circuit (20) of feeding and control of theequipment consists, substantially: of a control circuit and interaction withthe operator consisted of association: of key (27) to start the electric sole¬noid test (103) of the dosing valve (100) (start); of automatic control (26) ofelectric non pulsed feeding commutation to make the opening/closing water-tight test; of key (29) to cancel the time (reset); of key (30) to start and can¬cel the test; mentioned keys are associated to buttons, respectively, (27)',(29)', (30)' of the panel of the equipment; mentioned circuit still contains:digital dial of charge vacuum time (31a); digital dial of time test and of testreading (31b); lamp (32a) coil test indicator, connected in parallel to theconnector circuit (25); lamp (32b) indicator of the watertight test (pressure); and lamp (32c) indicator of the reading time of the test of the watertight andof end of injector test test (injector analysed).6)-"INJECTOR NOZZLE TEST EQUIPMENT", according to claimed in 2or 3 or 4 or 5, characterized by device of solenoid coil test (103) of the dos-ing valve, incorporated to electro-electronic feeding circuit and control (20)consisted, substantially of the association: of the electro-electronic feedingand control circuit (20) provided for electric pulsed feeding, what naturallyoccurs when mentioned circuit is turned on through key (23) (default); to thefeeding circuit 5v (21); circuit (24) of solenoid electric feeding (103); con-nectors (25); key (27) of the solenoid electric test start; and lamp (32a) coiltest indicator.I)- "INJECTOR NOZZLE TEST EQUIPMENT", according to claimed in 1,characterized by adaptors (41 for the attachment of the injector nozzle dur¬ing test consists, essentially: by a receptacle (42) enough to receive the ex-tremity of the segment (170) of the injector nozzle body, in the peripheryand centre of which open the circuits, respectively, of low (150) and high(160) pressure; of rubber seat (43) that is placed inside the receptacle (42)provided with peripheral passage (44) and axial (45), that open, respectively,in a peripheral surrounding channel (46) and central trunk-conic (47) on thesuperior face of the seat, to which are coupled the extremities of the low cir¬cuits (150) and high (160) pressure of the nozzle and opposed mentioned passages (44) and (45) are linked to valves (6a) and (6b) and controlled bythem; mentioned adapter (41) still consists of a device of quick clamp acti¬vated by cams and gauntlets (48) for attachment of the injector nozzle.8)-" INJECTOR NIZZLETEST METHOD", implemented by this equip-ment according to claimed in the claims from 1 to 7, characterized by thestages of:I)- Dismount the extremity (170) of the injectornozzle body, to expose the extremities of segments of the circuits of low(150) and high (160) pressure of the nozzle, assemble mentioned nozzle,without mentioned segment (170) and through mentioned extremity whichcontains the extremities of the circuits (150), (160), in adapter (41) of thenozzle;2)- Turn the low circuits (150), and high (160)pressure on of the nozzle in pneumatic circuit (2) of the equipment;3)- Turn the solenoid terminals (103) of the dosingvalve (100) of the injector nozzle in electro-electronic circuit terminals offeeding and control (20) of the equipment; and accomplish:I)- Test method of the electric part (coil) of the so¬lenoid (103) of the dosing valve (100) of the injector nozzle, consisted of thestages: Ll)- Feed with pulsed electric feeding a test lamp(32a) of the equipment; and the solenoid (103) of the dosing valve (100) ofthe injector nozzle so that, in normal solenoid conditions (103), the test lampblinks and the solenoid (103) and the spring (104) oscillate the piston (102)against the seat (105) of the dosing valve (100) of the nozzle to produce acharacteristic sound audible by the test operator;II.2)- Associate the occurrence or no occurrence ofthe characteristic sound of the dosing valve (100) and the blinking of thelamp of the coil test (32a) to detect the occurrence or no of defect of theelectric part, solenoid (103), of the dosing valve (100), so that:I)- Lamp (32a) blinking and no characteristicsound of the coil implies that it has defect: the piston jammed or interrupted(103) coil .2)- Lamp (32a) turned off implies in short circuitcoil and:3)- Lamp (32a) blinking and presence of character¬istic sound implies in normal coil; and accomplish:H)- Test method of opening/closing and watertightof the dosing valve (100) and the union of the low circuit pressure (150) of itand valve test MOO), of the union of the high pressure (160) between it and the cylinder (111)-(112) of the mechanical injector (110) and the cylinder(111)-(112).9)- "TEST METHOD OF INJECTOR NOZZLE" ,according to claimed in claim 8, characterized by H)- Test method of open-ing/closing and watertight of the dosing valve (100) and the union of the cir¬cuit of low pressure (150) of it and the valve (100), of the union of the cir¬cuit of high pressure (160) between it and the cylinder (111)-(112) of themechanical injector (110) and the cylinder (111)-(112) consists, essentially,of:II. I)- Stage to accomplish opening/closing and wa¬tertight test, alternatively, first of all, in the dosing valve (100) and in theunion of the circuit of low pressure (150) of it; and

1.2)- Stage to accomplish the opening/closing and

watertight test of the dosing valve (100), in the union of the high pressure

(160) between it and cylinder (111)-(112) of the mechanical injector (110)

and the mentioned cylinder (111)-(112); mentioned ILl)- Stage for accom¬

plish opening/closing and watertight test of the dosing valve (100) and the

union of the low pressure circuit (150) of it, consists:

ILLl)- Feed automatically solenoid (103) of the

dosing valve (100) of the nozzle with electric feeding non pulsed through

equipment, so that the piston (102) of the dosing valve (100) closed the seat (105), isolating the circuit of low pressure (150) of the circuit of high pres¬

sure (160) of the nozzle;

II.1.2)- Select for test, through key activation (6a')

and (6b⁵) of the equipment in adequate positions, the low circuit (150) of the

nozzle; mentioned low pressure circuit(150) when selected is turned on

through connection valve and adequate selection (6a) of the equipment to

the pneumatic circuit (2), at the same time that the other connection valve

and adequate selection (6b) of the equipment maintain the high pressure cir¬

cuit (160) open to the environment;

II.1.3)- Charge the pneumatic circuit(2) of the

equipment and the low pressure circuit (150) selected from the nozzle with

vacuum level of adequate test, through the vacuum pump (3) of the equip¬

ment, kept turned on for determined Vacuum Charge Time, shown and sig¬

nalized in the equipment;

II.1.4)- Measure gradually the rise of the vacuum

in the pneumatic circuit (2) of the equipment and circuit of low pressure

(150) of the injector nozzle, through vacuum gauge (7) of the circuit (2), un¬

til the level of the adequate vacuum level test and in it inhibit the vacuum

generating source, pump (3) of the equipment, close the return valve (4) and

turn on the test indicating lamp indicator of the equipment; 32 , _ . . „ .

II.1,5)- Keep the pneumatic circuit (2) of the

equipment and low pressure circuit (150) of the nozzle under vacuum during

determined Test Time, shown an signalized by the equipment and keep the

vacuum measurement through vacuum gauge (7) during Test Time;

II.1.6)- At the end of Test Time, turn off the test

indicating lamp, turn on the reading lamp and close the reading attachment

lamp (5), to isolate the pneumatic circuit (2) of the equipment of the low

pressure circuit (150) of the injector nozzle, attaching the register of the

vacuum level of the vacuum gauge (7) so that the operator can make the

reading, at the end of the reading time, turn off the reading lamp and open

the relief valve (8) of the equipment, alleviating the pressure in the circuits

and giving condition for a new test;

II.1.7)- Interpret the eventual maintenance of the

vacuum level test or the vacuum fall in normal level or the fall of vacuum

level in abnormal measures by the vacuum gauge (7) during Test Time as

normal condition or ring defects (108) and/or (109) and or flange (102)'

and/or of the seat (105 ) of the mounting side of the dosing valve (100) of

the nozzle of the low pressure circuit (150).

10)- "TEST METHOD OF INJECTOR NOZZLE", according to claim in

the claim 9, characterized by 1.2)- Stage to accomplish opening/close and

watertight test in the dosing valve (100), at the union of high pressure circuit (160) between it and the cylinder (111)-(112), of the mechanical injector

(110) and the mentioned cylinder (111)-(112), consists of:

1.2.1.)- Select for test, through activating keys (6a')

and (6b') of the equipment in adequate positions, the high pressure circuit

(160) of the nozzle; mentioned high pressure circuit (160) when selected is

connected through adequate connection of adequate selection and connec¬

tion valve (6b) of the equipment to the pneumatic circuit (2), at the same

time that another adequate connection and selection valve (6a) of the

equipment keeps the low pressure circuit (150) open to the environment;

1.2.2)- Charge the pneumatic circuit (2) of the

equipment and the high pressure circuit (160) selected form the nozzle with

adequate vacuum level test , through vacuum pump (3) of the equipment,

kept turned on for determined Vacuum Charge Time, shown and signalized

by the equipment;

1-2.3)- Measure gradually the vacuum rise in the

pneumatic circuit (2) of the equipment and high pressure circuit (160) of the

nozzle, through vacuum gauge (7) of the circuit (2), until the adequate vac¬

uum level test and in it inhibit the vacuum generating source, pump (3) of

the nozzle, close the retaining valve (4) and turn on the test lamp;

1.2.4)- Keep the pneumatic circuit (2) of the

equipment and high pressure circuit (160) of the nozzle under vacuum dur- ing determined Test Time, shown and signalized by the equipment and keep

the vacuum measurement through vacuum gauge (7) during Test Time;

1.2.5)- At the end of Test Time, turn off the test

indicating lamp, turn on the reading lamp and close the attachment reading

valve (5) of the equipment, to isolate the pneumatic circuit (2) of the equip¬

ment of the high pressure circuit (160) of the nozzle, attaching the register of

vacuum level of the vacuum gauge (7), so that the operator can make the

reading, at the end of the reading time, turn off the reading lamp and open

the alleviating valve (8) of the equipment, alleviating the pressure in the cir-

cuits and giving conditions for a new test; and

1.2.6)- Interpret the eventual maintenance of the

vacuum test level or vacuum fall in normal level or the vacuum fall in ab¬

normal level measured by the vacuum gauge (7) during Test Time as normal

condition or defect in piston (112) and/or in the passage of the nozzle body

in which it moves; and/or of the flange (102)'and/or of the seat (105) at the

downstream side of it of the high pressure circuit (160).