Arc-top piston top, arc-top piston and combustion chamber

A piston and arc top technology, applied in the direction of piston, engine lubrication, machine/engine, etc., can solve the problems of poor engine fuel economy, intake tumble loss, poor surface roughness, etc., and achieve the optimization and improvement of airflow movement form. The effect of knock dip, enhanced fuel flow and heat transfer
CN113404615AInactive Publication Date: 2021-09-17天津内燃机研究所(天津摩托车技术中心)
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
天津内燃机研究所(天津摩托车技术中心)
Publication Date
2021-09-17
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an arc-top piston top, an arc-top piston and a combustion chamber. The arc-top piston top comprises an arc-shaped pit area and two conical surface protruding area; the arc-shaped pit area is a bowl-shaped pit and is located in the center of the arc-top piston top; the height of the first end of each conical surface protruding area is larger than that of the second end of each conical surface protruding area, the first ends of the conical surface protruding areas make contact with the outer edge of the arc-shaped pit area, and the second ends of the conical surface protruding areas extend to the edge of the arc-top piston top; the two conical surface protruding areas are located on the front side and the rear side of the arc-shaped pit area respectively, and the two conical surface protruding areas are symmetrically arranged relative to the arc-shaped pit area. The arc-top piston top can be applied to a large-cylinder-diameter and high-compression-ratio engine, the airflow movement speed in the air inlet stroke of the engine can be increased to a large extent, the compression stroke and the turbulence energy at the tail end are improved, and the knocking phenomenon of the large-cylinder-diameter and high-compression-ratio engine in the related technology is effectively avoided.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The disclosure relates to the field of engines, in particular to an arc-top piston top, an arc-top piston and a combustion chamber. Background technique

[0002] The engine is the main emission source of air pollutants, but also an important source of carbon emissions. The average annual oil consumption of engines accounts for more than 60% of my country's total oil consumption, and its carbon dioxide emissions exceed 10% of the country's total carbon emissions. With the continuous advancement of the concept of green development, engines are facing the challenge of increasingly stringent emission and fuel consumption regulations. The development of high thermal efficiency and near-zero emission engines has become the primary goal of the academic and engineering circles. At present, the development of high thermal efficiency gasoline engines mainly relies on technical means such as high compression ratio, external cooling EGR (exhaust gas recirculation)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More