Abstract:
PURPOSE: A mixed combustion engine using diesel and gasoline, a control method thereof, and a complex ignition type combustion system are provided to improve cold start performance as the system is ignited by a spark plug in a low load area. CONSTITUTION: Complex ignition type combustion system comprises a cylinder block(10), a spark plug(12), a diesel injector(13), and an electronic control unit(30). The cylinder block comprises a plurality of cylinders(11), and each cylinder is connected to intake(21) and exhaust manifolds. The spark plug and the diesel injector are placed in the cylinder. The electronic control unit sucks air to the cylinder if an operation zone is in a high load area, and performs compression ignition by spraying diesel to the diesel injector. The electronic control unit sucks mixed gas into the cylinder if the operation area is in a low load area, and performs spark ignition. The electronic control unit performs the compression ignition by spraying the diesel to an diesel injector if the operation area is between the high and low load areas.
Abstract:
PURPOSE: A combustion chamber for a common rail injection system is provided to apply high injection pressure at the low speed region and realize the output improvement with the efficient combustion. CONSTITUTION: A combustion chamber for a common rail injection system is characterized in that the high injection pressure is applied at the low speed, the diameter of the combustion chamber is enlarged to inhibit sprays from colliding with a wall surface, the spray is performed to prevent the spray superposition and combustion deterioration due to the high swirl flow intensity comparing with the spraying property at the low speed so that the swirl intensity decreases at the upper dead point, the depth of the combustion chamber is small to maintain the volume of the combustion chamber and compression ratio, and the spraying angle of an injector is made to be large.