God morgen
Huff der står det en del faktafeil, bl.a. at 2,5 og 3,1 har common rail injection... og litt annet slurv.
2,5 og 3,1 har god gammaldags indirekte innsprøytning (med forkammer topper), riktignok elektronisk styrt dieselpumpe, og 2 ventiler pr. sylinder naturlig nok.
Men som nevnt, utviklingen av motorene er nok helitaliensk.
I 1990 var VM først ute med elektronisk styrt dieselmotor (kalt Turbotronic den gangen).
Men basis for alle de senere motorene var "tunnel bore" prinsippet fra 1977 der veiva er oppplagret i doble halvsirkelformede lagerholdere i blokka og ikke som ordinære motorer med lageroverfall til veivlagrene.
Her litt bakgrunnsstoff:
"Applying the ‘tunnel bore design’ to a diesel engine came out of VM Motori’s engineering department in 1977. The development of this design was lead by VM R & D chief engineer, Ivo Maini. For fun, Maini ‘tricked up’ a tunnel bore six with amongst other things, a BMW gasoline fuel injection manifold and then installed his ‘Hot Rod’ diesel in a boat. In his diesel powered Hydro-plane he held world speed records for many years.
Also in 1977, BMW having manufactured marine engines since 1919, fired up their new BMW Marine GmbH division. To offer a full range of products, diesel engines were needed. With no suitable BMW diesel made ‘in-house’ BMW approached two relatively local engine makers; Hatz on the German – Austrian border and VM Motori in Northern Italy.
VM’s ‘ Tunnel Bore Six ‘ became the base upon which the BMW 6 cylinder marine diesels were built. VM supplied industrial engine blocks to the BMW Marine engine plant in Belgium. Here BMW’s engineers marinized them, producing the first BMW D150's. All the marine hardware and accessories’ were of BMW design."