Air intake passage injection type charged gasoline engine high-efficiency combustion chamber

Abstract

The invention provides an air intake passage injection type charged gasoline engine high-efficiency combustion chamber which comprises a combustion chamber cavity area A formed by a part under a cylinder cover combustion chamber dome, a part above the top surface of a piston, and a cylinder barrel between the cylinder cover combustion chamber dome and the piston in an enclosing and sealing way. An air intake door, an air exhaust door and a sparking plug are arranged on a cylinder cover and communicate to an air intake door and an air exhaust door of the combustion chamber cavity area A from the cylinder cover. The air intake passage injection type charged gasoline engine high-efficiency combustion chamber is characterized in that inclined air extrusion areas B and C are arranged on an air intake side and an air exhaust side; and each air extrusion gap is 0.9 to 1.1.mm. According to the air intake passage injection type charged gasoline engine high-efficiency combustion chamber provided by the invention, during upgrading air intake passage injection type gasoline engine pressurization, the cylinder cover and piston combustion chamber structure is customized and improved, and the combustion chamber adopts a two-inclined-air-extrusion technology, so that the airflow motion strength at a top dead center in an engine cylinder is improved, the oil-gas mixing rate is improved, and the combustion speed is improved; and a surface-to-volume ratio of the cylinder cover combustion chamber is reduced, the heat transfer loss and the near-wall unburned emission are reduced, and the design requirements on an engine power performance and an emission performance are met.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency gasoline engines, and in particular relates to a high-efficiency combustion chamber of an intake port injection type supercharged gasoline engine, and is especially suitable for the design of a combustion system based on an intake port injection type gasoline engine upgraded to a supercharged gasoline engine. Background technique [0002] With the rapid increase of the number of automobiles in our country, the impact on the environment and the demand for oil are increasing, and the situation of energy conservation and emission reduction is becoming increasingly severe. To this end, my country promulgated the fourth stage of fuel consumption regulations on January 1, 2015, and is about to implement the National VI emission standards. In order to face the national fuel consumption and emission regulations, research institutions and enterprises have spawned a series of new gasoline engine tec...

AI Technical Summary

Problems solved by technology

Since most of the enterprise inlet port injection supercharged gasoline engines are upgraded based on the previous naturally aspirated gasoline engines, the main parameters of the combustion chamber structure parameters of the naturally aspirated gasoline engines, such as stroke ratio, valve inclination angle, airway structure and other main parameters, give priority to the maximum intake air Quantity, etc., so the above key parameter ratio is not reasonable when upgrading to a supercharger

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