Patent ID: 6098588
Filing Date: 2000-08-08
Classification: F02B,Y02T

Abstract:
An injection device for an internal combustion engine, defined by a piston (2), a cylinder and a cylinder head (1), a multi-hole injection nozzle (5) and a shroud (3) projecting from the cylinder head into the combustion chamber (16), surrounding the nozzle (5) and defining a procombustion chamber in which precombustion takes place, the shroud (3) provided with orifices (6, 7, 20) in the combustion chamber, whereinthe shroud (3) at TDC defines together with the piston crown the precombustion chamber, and there is formed between shroud (3) and a camber (8) of the combustion-chamber well (4) a gap (9), through which combustion gases pass into the main combustion chamber (16) during precombustion, the diameter of the orifices (6,7,20) being chosen precisely such that a peripheral zone of each nozzle jet (15) is held back inside the shroud (3).