Page 13 - NSU Supermax Owner's Manual

i'f
" '
" '
I' Eccentric on intermediate'sh~ft
,~ocker "'rry> , D.ESCRIPTION
Exho·us.t..cams , Eccentric rod
Balance weight
The Engi!1e
Eccentric on camshaft
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
:: I
The valves are of the overhead type driven from the
I
I· overhead camshaft by means of two rocker arms. The
I valve springs are ofhairpin form" ­
in co~trast 'to pre:vious designs· in whi~h the'drive to the
l
I: 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
Oil pump driving gear that the expansion of the cyliilder barrel dnd head on
Oil pump ,
I heating. up may not affect the eccentric drive adversely,'
Gear 0.." crankshaft the camshaft housing is free to swing, and is held on
\
, Clutch the left-hand side by the stationary distance rod which
Intermed,iate gear
is secured to t~e, crankcase ot the centre qf the lower
_ ..' -
eccentric ·shaft.
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