Swirl combustion system for opposed piston two-stroke diesel engines

Abstract

The invention discloses a swirl combustion system for opposed piston two-stroke diesel engines, which relates to the field of internal combustion engines. The swirl combustion system comprises a cylinder body, both ends of the cylinder body are respectively provided with left exhaust ports and right exhaust ports, and a first fuel injector and a second fuel injector are arranged on the cylinder body sidewall of the center of the cylinder body; a left piston which can reciprocate in the cylinder body is arranged between the center of the cylinder body and the left exhaust ports, and a right piston which can reciprocate in the cylinder body is arranged between the center of the cylinder body and the right exhaust ports; the end of each of the left piston and the right piston is provided with at least two pit structures, a swirl guide structure is formed at the joint between any two adjacent pit structures, the top edges of both the left piston and the right piston are provided with fuel injector-avoiding notches, and the fuel injector-avoiding notches are respectively arranged opposite to the swirl guide structures of the corresponding pistons. A combustion chamber structure in the swirl combustion system can form swirls of fuel spray, the utilization rate of the air in a combustion chamber is increased, and air-fuel mixture is accelerated.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a plume combustion system of an opposed-piston two-stroke diesel engine. Background technique [0002] The current development of the internal combustion engine industry is mainly centered on energy saving, fully taking into account the requirements of emissions and reliability, so as to achieve an overall improvement in the performance of internal combustion engines. Petroleum fuels consumed by internal combustion engines account for more than 60% of the total petroleum consumption, and almost 50% of the emissions of CO, HC and NOx produced by burning fossil fuels come from internal combustion engines. At present, countries around the world are focusing on the high compactness of the internal combustion engine structure, high power density, low fuel consumption and low emissions. Under such research trends, the opposed piston two-stroke engine is characterize...

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Problems solved by technology

[0005] Most of the existing opposed two-stroke diesel engines use piston crowns with dimples, which are simple to process and low in manufacturing cost. However, the working mode of opposed injection of double injectors forms opposite-moving fuel oil jets in the combustion chamber, which is easy to cause fuel oil The collision of the spray makes the small droplets of the fuel beam in the combustion chamber re-form into large droplets, which is not conducive to the breaking and evaporation of the fuel droplets and the rapid mixing with the air

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