NSU Supermax - NSU Max System Descriptions; Engine System Overview

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i'f

" '

I'

Eccentric on

intermediate'sh~ft

,~ocker

"'rry>

,

I

I·

Exho·us.t

..

cams

, Eccentric

rod

Balance

weight

Eccentric

on

camshaft

::

I

I

I:

','

Oil

pump

driving

gear

Oil

pump

,

Gear

0.."

crankshaft

\

Intermed,iate

gear

, Clutch

_

..

' -

10

.~,:

" '

D.ESCRIPTION

The

Engi!1e

The

NSU

Mal'

engine

is

an

a.ir-cooled, four-stroke

engine

built

in

unit with the

gea~

b0x'"

-

The'

Cranksh~ft

runs

in

roller

bearings,

The driving pinion

for

the

oil

pump

and

for

the

intermediate

gear

is

fitted

on

the

left-hand

end

of

the

crankshaft,

while

the

generator

is

'

fitted'

on

the

right-hand end. The

connecting-rod

big-end

bea,r-ings

·isa

roller·

bearing.

The light:alloy piston

is

pro-

vided _

Y".ith.

tWQ

compression

rin--9s

and

one

oil

scraper

ring.

Valve Geqr

The valves

are

of

the

overhead

type driven from

the

overhead

camshaft

by

means

of

two rocker arms. The

valve springs

are

of

hairpin

form"

-

in

co~trast

'to

pre:vious

l

designs·

in

whi~h

the'drive

to

the

overhead

camshaft

is

by

means

oJ a

shaft,

gears,

or

a

chain;

the

'drive

of

the

Max consists

of

.a

pair

of

eccen-

.'lric shafts,

each

carrying

two

eccentrics

at

90

0

to

each

,other,'

and.

two'

connecting rods. The lower

eccentric'

shaft

is

bolted

to,

the

intermediate

gear,

'and

the

upper

.to

th:~'

camshaft. The two

connecting.

roS:ls

which trans-

mit synchronously

the

rotary

motion

to'

the

camshaft

are

'carried

on

the

eccentrics

in

bronze' beari.ngs,

In

order

that

the

expansion

of

the

cyliilder

barrel

dnd

head

on

I heating. up may not

affect

the

eccentric drive

adversely,'

the

camshaft

housing

is

free to swing,

and

is

held on

the

left-hand

side

by

the

stationary

distance

rod which

is

secured

to

t~e,

crankcase

ot

the

centre

qf

the

lower

eccentric ·shaft.

·11

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