Abstract: Disclosed is a combustion chamber of a diesel engine provided with a bowl having a concave shape so that fuel injected from an injector creates a swirl or squishing flow to be mixed with air, and the combustion chamber of the diesel engine includes: a pip protruding from a center of a lower surface of the bowl toward the injector; a lip part protruding from a side surface of the bowl toward the injector; and a main combustion chamber provided on a lower portion of the lip part and a sub combustion chamber provided on an upper portion of the lip part, with the lip part interposed therebetween, in which a surface of the sub combustion chamber is formed in a flat shape or a concave bowl shape to have a depth of the sub combustion chamber of 0.8 mm or lower.

Abstract: The present disclosure relates to a common rail injector having a swirl spray nozzle which has a tip having an orifice at a lower end portion of a housing. An upper portion of the tip is closed by means of a cup-shaped nozzle portion, the nozzle portion has a cylindrical side wall surface, a flat base which terminates an upper portion of the side wall surface, and one or more nozzle holes which allow the hollow portion and the orifice to communicate with each other, and the nozzle holes are formed in a tangential direction of the orifice so as to inject fuel in a swirl manner.

Abstract: The present disclosure relates to a combustion bowl shape of a direct injection diesel engine for reducing soot. The combustion bowl shape of the direct injection diesel engine for reducing soot according to the present disclosure includes: a lip part protruding from an internal circumferential surface; a main combustion bowl formed at a lower side based on the lip part; and a sub combustion bowl formed at an upper side based on the lip part, in which a diameter ratio of a combustion bowl entrance diameter of the sub combustion bowl to a main combustion bowl maximum diameter of the main combustion bowl is 1.10 to 1.40.

Abstract: Disclosed is a combustion chamber of a diesel engine provided with a bowl having a concave shape so that fuel injected from an injector creates a swirl or squishing flow to be mixed with air, and the combustion chamber of the diesel engine includes: a pip protruding from a center of a lower surface of the bowl toward the injector; a lip part protruding from a side surface of the bowl toward the injector; and a main combustion chamber provided on a lower portion of the lip part and a sub combustion chamber provided on an upper portion of the lip part, with the lip part interposed therebetween, in which a surface of the sub combustion chamber is formed in a flat shape or a concave bowl shape to have a depth of the sub combustion chamber of 0.8 mm or lower.