Piston, engine and vehicle

Abstract

The invention relates to the technical field of pistons, in particular to a piston, an engine and a vehicle. The piston is provided with a combustion chamber with an omega-shape, the inner wall of thecombustion chamber comprises a conical table surface located in the center, and an arc-shaped surface connected to the periphery of the conical table surface, in the circumferential direction, a plurality of dividing bumps are arranged on the conical table surface at intervals, oil injection channels are formed between any two adjacent dividing bumps, a plurality of oil injecting holes of an oilinjector can inject the oil into the multiple oil injection channels one by one, the oil liquid can be atomized into oil mist in the combustion chamber, part of the oil mist can pass through the oil injection channels and impact on the arc-shaped surface to form upward curling flow, so as to utilize the air outside the combustion chamber for combustion, the other part of oil mist can collide on the two adjacent dividing bumps and form lateral curling flow movement, so as to utilize the air inside the combustion chamber for combustion, the air in the combustion chamber can be fully utilized toensure the combustion efficiency, and thus the overall dynamic performance and emission performance of the engine are improved.

Description

technical field [0001] The invention relates to the technical field of pistons, in particular to a piston, an engine and a vehicle. Background technique [0002] With the increasingly stringent emission regulations and rising fuel prices, in the competition of vehicle power systems, people began to pay more and more attention to the issue of engine energy saving and consumption reduction. From the perspective of the combustion chamber, increasing the compression ratio and optimizing the shape of the combustion chamber are the main means to reduce fuel consumption and emissions. At present, there are two commonly used combustion chamber shapes, which are ω-type and step-type. The combustion of these two kinds of combustion chamber organization is that the spray impinges on the wall of the combustion chamber, and then spreads upward and downward. Because the density of the fuel is greater than that of the air, the fuel is easily diffused due to the centrifugal force of the v...

AI Technical Summary

Problems solved by technology

Because the density of fuel is greater than that of air, the fuel is easily diffused by the centrifugal force of the vortex rotation, resulting in the ineffective use of the mixture in the center of the combustion chamber.

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