Volkswagen Golf Diesel 2009 Mode D'emploi page 291

Fuel System
Injector
Each fuel injector has six individual fuel openings,
providing better mixture preparation.
This also helps prevent "wetting" the intake valves
and the combustion chamber surfaces during
injection cycles.
Multi Port Injector
42
The angle of cone of the jet is 50°. These
modifi cations have resulted in reduced HC
emissions, particulate matter formation, and oil
thinning.
Single Port Injector