Natural gas engine piston and engine

Abstract

The invention relates to a natural gas engine piston and an engine, and relates to the technical field of engine structures. The engine piston comprises a piston body, the piston body comprises a piston combustion chamber, the piston combustion chamber is in an inclined necking shape from inside to outside, and an outward necking of the piston combustion chamber is circular; the center of the bottom wall of the piston combustion chamber forms a spherical protrusion into the piston combustion chamber; and when gas and air enter an air cylinder, the gas and the air flow to the spherical protrusion on the bottom wall along the side wall of the piston combustion chamber to form tumble flow. The engine comprises the engine piston, and a fuel gas discharging channel outlet and an air intake channel outlet of a cylinder cover of the engine are both internally tangent to the side wall of the piston combustion chamber. According to the natural gas engine piston and the engine, a novel engine piston combustion chamber structure is designed, and mixed gas of fuel and air forms tumble flow after entering the combustion chamber, so that the combustion efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of engine structure, in particular to a natural gas engine piston and engine. Background technique [0002] The piston is one of the parts of the engine. Its main function is to withstand the gas pressure in the cylinder and transmit this pressure to the connecting rod through the piston pin to drive the crankshaft to rotate. The top surface of the piston, the cylinder head, and the wall of the cylinder together form the combustion chamber, so the top surface of the piston is directly related to the combustion efficiency of the fuel in the combustion chamber, which directly affects the formation of swirl and tumble flow in the combustion chamber. [0003] In related technologies, the combustion chamber on the top surface of the piston of a traditional natural gas engine is mostly shallow bathtub-shaped or straight barrel-shaped, the bottom of the combustion chamber is flat-bottomed, and the combust...

AI Technical Summary

Problems solved by technology

Using the combustion chamber on the top surface of the piston of a traditional natural gas engine, the gas cannot be effectively mixed evenly. In the natural gas equivalent ratio combustion system, the over-concentrated natural gas and air cannot be mixed evenly and fully, resulting in a decrease in combustion efficiency and affecting the power of the engine.

Images