MAN direct injection with bowl-in piston function of the rocker and valves (fine springs enable smooth operation). function of the cut up injection nozzle. function of the bowl-in piston. function of the air-cooled cylinder. description ordernumber 1167 see also: Common-rail high pressure pump with fuel-delivery regulation valve vane-type pump, PC swivel-vane vacuum pump for diesel engine four-valve cylinder head, diesel direct injection, lorry