8/18/2019 NHA info

1/5

Explanation

f

type

designations

O

Every

Bosch

nozzle

s

designed

to fit the

relevant

ngine

ype;

this

ensures

ptimal

ombustion,

minimum

missions

nd

maximum ngine

utput.

O

With

Bosch nozzles,

he

tolerances

greed

upon

with he

manufacturer

re

exactly

maintained.

Precision uaranteesunctional

reliability.

anufacturing

tolerance

0.005

mm.

O Only

use of

the correct

Bosch

nozzle an

guarantee

perfect

engine

unning, ptimal

ue l

consumption,

erformance,

and exhaust

missions

ontrol.

lnstallation

must be carried

out

exactly

n accordance

with

application

nstructions

refer

to Catalog

Section

B.

O

The same

stringent

manufac-

turingand

est

recommendations

apply

or original

quipment

and

aftermarket

roducts.

Typedesignation

f a

nozzle

holder:

The

nozzle-holder

ombinations

with a

release ate

n

1999

or

laterno longer

containa

nozz-

le-holder.

The nozzle-holder

ombinations

are abelled ith he 1O-digit

Bdsch

ordernumber,

nd

not

with

the

holder ype

designation

s

in

the

past.

Even alid

nozzle-holder

combinations

ith a release

ate

prior

o

1999

havemostly

een

changed.

NB:

Thesenozzle-holder

combinations

re

no longer

delivered

with a

nozzle

holder

")

Typedesignationsith supplementnd

identical

part

number

re usedas

he

proof

of

process

hanges

uring

a

given

oeriod.

Typedesignations

ithsupplement

nd

changed

part

number

re used

or new

releases.

ere,different

ozzleypes

are

definitely

oncerned.

A 150

XX..

Serial

no.

Example:

ast seven

digits

of the

drg.

no .

Special

code

+,

-,

/, A,

B,

C. )

V

=

Experimental

ozzle,

D

=

with throttling

effect,

Without

initial

=

Standard

nozzle

P

=

14 mmcollar

S

=

17mmcol lar

T = 22mmco l la rO

U

=

30

mmcollar

@

Y

=

42 mm collar

A

W = 50 mmcollar@

Spray

cone

angle

(degrees)

Single-jet

ored

=

max.elevation

ngle

(degrees)

A

=

Fixed,

without nap

ing

groove,

ne

nlet

passage

B

=

Position

f inlet

passage

pposite

A

Z

=

Fixed,

wiihoutsnap

ing

groove,

wo

inlet

passages.

Without

nitial

With snap

ing

groove,

L

=

Long

nozzlecollar,

P

=

Flat seat

nozzle

Without

initial

=

Short

nozzle

collar

F

=

Liquidcooling

N

=

Pintle

nozzle,L

=

Hole-type

ozzle,

S

=

Holetype

seat nozzle

D

=

Nozzle

A L Z 1 O 5 S V X X . .

P =

S _

Serial

no .

Example:

Last seven

digits of

the drg.

no.

V

=

Experimental

older

Without

initial

=

Standard

holder

Nozzle

T=

Nozzle

V= Nozzle

Nozz le U= Nozz le W=Nozz le

Fitting

ength

(mm)

Z

=

fwo inlet

passages

Without

initial

=

One inlet

passage

L

=

Long nozzle

collar

Without

initial

=

Short

nozzlecollar

A

=

Bottom-fitted

spring

holder-A

17 mm

(P-nozzle)

holder-A

25 mm

(S-nozzle)

E

=

Bottom-fitted

spring

holder-O

21

mm

(P-

and S-nozzle)

N

=

Bottom-fitted

pring

holder-@

17121

mm

(P-nozzle)

B

=

Flange

or

lug-mounting

C

=

Screw

thread on

nozzle-retaining

ut

D

=

Union

nu t

K

=

Nozzle-holder

8/18/2019 NHA info

2/5

Nozzle

echnology

1

e

4

Description

f nozzle

parts

1

Nozzle

body

togetherwith

needle,

onstitutes

he

injection

ozzle.

2

Inlet

passage

suppliesuel

o

pressure

hamber.

3

Needle

ensures

orrect

et

ormation

nd

seals

off nozzlerom

combustion

hamber

4

Pressure

hamber

permits

ressure

uild-up ecessary

lor nozzleo ooen.

5

Pressure

in

ensures orrect

uel

et .

6

Nozzle-needle

eat'

forms

single ni t ogether

ith

he

needle

eating nd

prevents

uel

drip

thus

preventing

ngine knocking"

nd

"smoking".

7

Dual

cone

for long

serviceife.

I

Blind

hole

permits ressure

uild-up ecessary

or

nozzle

o ooen.

9

Sprayhole

through

which

he uel

et

enters he

combustion

hamber t

a

precisely

determinedngle.

Description

f

the nozzle-holder

combination

arts

1 0 I n l e t

supplies

uel o injection

ozzle.

i 1

Edge-type

ilter

prevents

ntryof foreign

matter

uring

installation.

12

Leakage

eturn

returns

eakoil rom

njection ozzle.

13

Pressure-compensation

isk

for

setting he

appropriate

pecified

opentng ressure.

14 Pressure pring

in conjunction

ith

setting crew,

ensures

pecified

pening

ressure

andclosesneedle

gain

fter njection.

15

Locating

in

orevents

orsional tress

on nter-

mediate

ing

and njection

ozzle,

nd

locates

hem

precisely.

16

Pressure

in

with intermediate

ing

mechanically

ransmits

he spring orce

onto he njection

ozzle

nd seals

of f

the nozzle-holder

rom

he nozzle.

17

Pintle

ozzle

(see

enlarged

rawing)

18

Hole-type

ozzle

(see

enlarged rawing)

8/18/2019 NHA info

3/5

Nozzle

echnology

continued)

Fig.

1:

Standard

pint le

nozz le

1

Lift stop

surface,

2

Ring

groove,

3

Needle

guide,

4 Nozzle-body

shaft,

5 Pressure

chamber,

6

Pressure

shoulder,

7 Seat

ead- in,

In let

oPening,

9 Nozzle-body

shoulder,

1O Nozz le-body

ol lar ,

11 Seal ing

sur face,

12 Pressure

pin,

13 Pressure-pin

contact

surface.

Application

Pintle ozzles

reused

or ndirect-

injection

lDl)

engines

prechamber

and

whir l -chamber

ngines).

In hese

engines,

he

A/F

mixture

s

primarily repared y heair's ortex

work.

This orm

of airlfuel

reparation

is also

supported

y he

njection

spray.

he

ollowing

intle-nozzle

types

are

available:

-

Standard

intle

ozzles

Fig.

1)

-

Throttl ing

intle ozzles

Fig.

2) ,

-

Flat-cut

intle

ozzles

Fig.

3) .

Versions

Standard

pintle

nozzle

Theend

of the

standard

intle

nozzle's

eedle

s

provided

ith

a

pintle

which

projectsnto he

nozzle

body'snjectionrificewitha mini-

mum

of

play.

A

variety

f dimensions

nd

pintle

e-

signs

permit

he

njection pray

o be

adjusted

o the

engine's

equire-

ments.

Th ottling

pi

ntle

nozzle

The

hrottl ing

intle ozzle

s a

nozzle

withspecial

intle

imensions.

y

means

f

appropriate

intle

esign,

f

becomes

ossible

o shape

he

rate-

of-dischargeurveas required.

n he

first

stage

f opening,

he

nozzle

needle

nly

opens

a

verysmall

in g

gap

hrough

which

only

a small

amount

f

fuelcan

low

(throttl ing

process).

When

he

pressurencrea-

ses

he

nozzle

pens

urther

nd

he

ring

gap

ncreases

n size

o hat

more

uelcan

low

(Fig.

2b)'

Main

iniection

tarts

owards

heend

of

the

needle

troke

Fig.

2c).Since

he

combustion-chamber

ressure

ises

less

quickly,

haping

he

rate-of-

discharge

urve

eads

o

,,softer"

combustionnd he engines quieter

in he

pari-load

ange.This

eans

ha t

the

appropriate

intle

hape,

ogether

with he

hrottl ing

ap

and

he

charac-

teristic

f

the

nozzle-holder

pring,

all

contribute

o defining

he

rate-of-

discharge

urve

s

required.

Fig.

3: F lat -cut

int le

nozz le.

a) Side

view, b)

Front

view.

1 Needle

seat,

2 Nozzle-bodY

loor,

3

Throt t l ing

int le,

F lat

cut ,

5 In jec t ion

r i f ice,

Prof i le

pint le,

7

Total overlap,

I Cy l indr ical

ver lap,

9

Nozzle-body

seat.

a

1

Flat-cut

intle

nozzle

The

pintie

as

a

ground

urface

which

withonly

very mall

eedle

if t

releases

further

lowsection

n addi-

tion

o

the

ring

gap.

Deposits

hich

may

have ollected

n hischannel

re

removed

y he

ncreased

olumetric

flow

which

means

hat

lat-cut

intle

nozzles

oke-up

ess,

and

when heY

do,

he deposits

re

moreuniform.

The

ing

gap

between

njection

rifice

and

pintle

s

verysmall

less

ha n

1 0

u m ) .

The

ground urface

s often

parallel

o

the

nozzle-needle

xis.

The

lat

parl

of the

flow curve

can

given more

pronounced

isebY

applying

n additional

lanted

ur -

face,

hus

permitting

ofter

ransition

to ful lnozzle pening.

Special

eometric hapes,

uch

as

,,radius

intle" nd

,profi le

urface"

areapplied

o

adapt

he low

curve

o

engine-specific

equirements.

hese

contribute

o

reducing

he

part-load

noise

nd

mproving

riveability.

/ , '

b) Slightly

opened

(pilot

et),

c )

Ful lyopened

(main

et) .

8/18/2019 NHA info

4/5

Fig.

4:

Sac-hole

nozz le.

1

Pressure pin,

2

Lift stop

surface

3 Inlet porl,

4 Pressure

shouldel

5 Needle

shaft,

6 Nozzle

ip ,

7

Nozzle

body,

I Nozzle-body

shoulder,

9 Pressure

hamber ,

10 Needleguide,

11

Nozzle-body

collar,

12

Locating

hole,

13

Sealing

surface,

14

Pressure-pin

contact

sunace.

Hole-type

ozzles

re used

ogether

with n-l ine

njection umps

or

direct-

injection

Dl)

engines.

They

re

sub-divided

nto:

-

Blind-hole

ozzles,

nd

-

Sac-less

VCO)

nozzles.

Versions

Blind-hole

nozzles

The

blind-hole

ozzle's

njection

orifices

rearranged

ithin

he

blind

(or

sac)hole

Fig.

a).

In

hecase

of

a round

nozzle

ip

(Fig.

5a),

he njection

rifices

re

bored

mechanically

r by

electro-

erosion

particle

emoval)

epending

upon

he

particular

esign.

Blind-hole

ozzles

ith

conical

ip

(Figs.

b

and5c)

are

always

ored

electro-erosively.

Blind-hole

ozzles

re

available

with

he

ollowing

lind-hole

hapes,

and

with

a variety

f different

ormenstons:

-

Cylindical

l indhole,

-

Conical

l ind

hole.

Blind-hole

nozzle

with

cvlind

ical

Fig.

5:

Sac-hole

hapes .

a)

Cylindrical

sac-hole

with

round

tip,

b) Cylindrical

sac-hole

with

conical

tip,

c)

Conical

sac-hole

with

conical

tio.

1

Contact

edge, 2

Seat lead-rn,

3 Needle

seat, 4

Needle

tip,

5 Injection

orif ice,

6 Injection-orif ice

ntrance,

7

Sac hole,

8 Throat

radius,

9 Nozzle-tip

cone,

10

Nozzle-body

seat,

1 1 Damping

cone.

blind

hole

and

round

tip

(Fig.

Sa):

The

blind-hole

as

a cylindrical

nd

a hemispherica l

ectioi

and

permits

a wide

degree

f

design reedom

regarding

-

Number

f injection

rifices,-

Length

f

orifices,

nd

-

Injection

ngle.

The

nozzle

ip s hemispherical

n

shape

nd

ogether

ith

he

blind-

hole

hape

his

ensures

uniform

injection-orif

ce

ength.

Blind-hole

nozzle

with

cyl ndrical

blind-hole

and

conical

ip

(FiS.

St):

This

orm

of nozzle

s

used

only

or

injection-orifice

engths

f 0.6

mm.

The

ip's

conical

hape ncreases

he

tip

strength

y

providing

thicker

wall

between

hroat

adius

ndnozzle-

bodyseat.

Blind-hole

nozzle

with

conicat

blind

hole

and

conicaltip

(Fig.

Sc):

Due

o its

conical

orm,

hevolume

f

the

blind

hole n

his

nozzle

ersion

s

less

han

hat

of the

cylindrical

lind

hole

n

he

nozzle

bove.

he

volume

of

the

(conical)

l ind

hole

s

between

Fig.

6: 'Sac- less

VCO)

nozz le

Fig.

7:

Tip

prof i le

of the

sac-less

(VCO)

nozzle

that

of

the sac-less

VCO)

nozzle

and

hat

of the

blind-hole

ozzle

it h

cylindrical

l ind-hole.

n

order

o have

a

uniform

ip-wall

hickness,

he

ip

is

designed

o

be

conical

n ine

with

thebl ind ole.

Sac-/ess

VCO)

nozzle

In

order

o

reduce

he residual

volume,

nd

hus

he

HC

emissions,

the

start

of

the njection

rifice

s

oca-

ted

in

the nozzle

ody's

seat

aper,

and

s

almost

ompletely

overed

y

the needle

when

he nozzle

s

closed.

This

means

hat

here

s no

direct

connection

etween

lind

hole

and

combustion

hamber

Figs.

and 7).

The

VCO

nozzle's

ac-hole

olume

is

considerably

maller

han

hat

of

the blind-hole

ozzle.

ompared

o

blind-holeozzles,he VCO nozzle's

have

much

ower

oad

imit

nd

ca n

therfore

nly

be

produced

s

size

P

nozzles

ith

a hole

ength

f 1 mm.

For

easons

f

strength,

conical

ip

form

has

been

hosen,

nd

he

injection

rifices

re

always

bored

by

means

f electro-erosion.

8/18/2019 NHA info

5/5

New

nozzle

packaging

1 Nozzle

2

Safety

cap

3 Original

ayonet

ap

4 Bosch

abel

5 Nozzle

dge n hermo

paint

6 Safetycontainermade rom

recyclable

lastic

7 VGI corrosion

protective

membrane

Original

nozzles

with Bosch

safety

Bosch

quality

s unique.

ut only

when

you're

dealing

with he

original.

ust

because

osch

s on

the

abel,

oesn't

mean

hat

Bosch

s

what

you

get.

Which

s

why we

havedeveloped

the

new

safety

container

or

nozzles

your

guarantee

f

Bosch

quality.

Easy

o handle

The forgery-proof

nozzle afety

container

rom

Bosch

offers

You

several

dvantages.

he

packa-

ging

makes he

nozzle

asy

and

straightforward

o

handle.

The

nozzle an

be

removed

easily

and

conveniently.

imply

reak

he

ring,

emovehe

seal,

and

oPen

the

safety

cap.

Youcan

hen

re-

move

he

nozzle

rom the

safetY

container.

Advantages:

O Sealing

ing

ocking

echnique

guarantees

enuine osch

quality.

O

Thermo

mprint

s

proof

of

originality

O

Easy o

handle

hanks

o

practical

ontainer-technique

O

Effective,

tate-of-the-art

CI

corrosion

rotectiorr

O Packingmaterials suitable

for recycling

ith household

rubbisch

Well

protected

The VCI

corrosion

protection

system

means he

nozzle

an

be

stored

withoutoil

or wax

and

still

be

protectedagainst

ust.

Created

sing

utting-edge

findings

rom he

worldof techno-

logy, he

permanentlyaporising

VCI

gases orm a

razor-thin,

.ut

safe

protectiveilm on the

nozzle.

Even

on damp

surfaces,

CI

is an effective

orrosion-inhibitor

withoutdirect

contact.

To see

f it's an

original:

Heat he area

between

he

Bosch

labeland heBosch ogowith an

open

lame.

f it is an original

Bosch

pad,

he

Bosch

nozzle

il l

appear

lue

and

remain

his

colour

ever

afterwards.