Patent ID: 6378490
Filing Date: 2002-04-30
Classification: F02B,F02F,Y02T

Abstract:
A direct-injection internal combustion engine which has per cylinder at least two intake valves mounted side by side, a plurality of exhaust valves, a coaxial spark plug, an injection valve, and a piston, the injection valve (4) being mounted between two of the intake valves (1) mounted side by side and the section of the cylinder wall adjoining these intake valves (1), and the piston (5, 5â€²) having an oblong combustion chamber trough (6) which extends in the direction of the vertical projection of an injection stream (E) emerging from the injection valve (4) onto the face of the piston (5, 5â€²), widening in the direction of the injection stream (E), and having a step (7) extending crosswise which divides the combustion chamber trough (6) into a first area (8) remote from the injection valve and second area (8â€²) near the injection valve (4), the first area (8) of the combustion chamber trough (6) being deeper than the second area (8â€²) and sloping toward the edge of the piston (5, 5â€²).