A combustion chamber structure of a direct injection engine is configured in such a manner that smoke, NO, and the like are reduced by a simple change in the shape of a cavity. The combustion chamber structure of a direct injection engine includes a cavity...

A piston combustion bowl (20) for a diesel engine is described. The piston (10) may decrease the production of particulate matter during combustion of the fuel vapour in the combustion chamber (11). The piston (1) may comprise a body (12) having a crown (1...

A piston combustion bowl (20) for a diesel engine is described. The piston (10) may decrease the production of particulate matter during combustion of the fuel vapour in the combustion chamber (11). The piston (10) may comprise a body (12) having a crown (...

The method involves providing injector nozzle arrangement (3) with a main injector nozzle (9) and an auxiliary injector nozzle (8). The primary portion fuel is injected into combustion chamber (20) by main injector nozzle along an injection direction at an...

For providing a combustion control device capable of decreasing unburned HC caused by a fuel attaching to a bore wall of a cylinder and unburned HC/CO produced by excessive diffusion of the fuel in premixed charge compression ignition combustion, an inject...

The method involves defining a combustion chamber (16) by a piston head (7) of a piston (5) and a cylinder tube, and injecting a conical injecting fuel spray with an opening angle between 85 degrees and 140 degrees into a piston bowl (8) provided in the he...

A combustor (36c) for use in a direct-inject internal combustion engine is described. The combustor comprises a substantially conical body (38) having a concave outer surface, an apex (40), which preferably receives fuel during at least a first period of a...

The piston has a bowl (18) whose surface has a projected central stud (20) and a peripheral part (23) surrounded by an annular chasse zone (24). The bowl has an inlet comprising an edge (26) whose surface is directed towards inside of the bowl and forms an...

The chamber (10) has a piston (14) sliding in a cylinder closed by a portion of a cylinder head (12), and including a surface forming a bowl (18). The surface has a projecting central pin (20) and a peripheral part (23) surrounded by an annular tracking zo...

The combustion chamber is formed between piston (1) and cylinder head (5). A central injector delivering n jets (20) of fuel to form a conic spray at an angle beta. The piston (1) crown has a cone-shaped top face with the apex (6) angle greater than 100 de...