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: high-pressure pump for engines with direct petrol injection (GDI) High-pressure pump (petrol direct injection) climatic compressor in-line fuel-injection pump with vacuum governor