Injection Nozzles

Peugeot engines use DNO SD 251 nozzles with KCA 17S38/4 holders. Opening pressure is 1645-1788 psi (115-125 kg/cm² ) on Non-Turbo models or 1788-1930 (125-135 kg/cm² ) on Turbo models. Volvo engines use DNO SD 193 nozzles with KCA 30 SD 27/4 holders. Opening pressure is 1706-1849 (120-130 kg/cm² ).

A pressurized mist of fuel is injected into a round swirl chamber. Fuel swirls around the chamber mixing with hot air, compressed at 23:1 for Non-Turbo models or 21:1 for Turbo models.

Combustion actually begins in rich swirl chamber and continues on through a small passageway and into leaner main chamber. As peak cylinder pressures build in swirl chamber, rather than main chamber, loads on connecting rods and crankshaft are reduced.