The invention discloses a combustion chamber of a diesel engine. The combustion chamber on the upper part of the piston is designed to be eccentric, offset X '= 2.5mm, Y' = 5mm. An annular constriction is arranged around the combustion chamber, and the annular contraction chamber divides the combustion chamber into two parts: the slope surface and the concave surface. The first and the second parts are connected by the arc transition of the beta angle and the R1, and the R2 is combined with the top surface of the piston. The center of the combustion chamber is a convex core platform, and the horizontal angle between the slope surface and the top surface of the piston body is beta = 21 deg. The arc length of slope and concave transition section is R1 = 2mm. The concave arc radius R3 and the convex and concave end core angle transition tangent, slope and the outer edge of the piston top surface of the transition section of arc length R2 = 2mm. The structure design of the combustion chamber can reasonably control the vortex intensity and the shape, the fuel and air mix combustion, and fuel not adhered to the wall surface of the combustion chamber, the convex core of large angle can eliminate dead volume to burn fully, improve engine power and reduce emissions.
【技术实现步骤摘要】
【技术保护点】
柴油发动机燃烧室，其特征是位于活塞体（１）上部的燃烧室（２）设计为偏心形，以活塞中心（０，０）为基点，燃烧室中心（０′，０′）的偏移量Ｘ′＝２．５ｍｍ，Ｙ′＝５ｍｍ，燃烧室（２）内周边为一环状缩口（３），环状缩口将燃烧室内周边分为坡面（４）和凹面（５）两部分，燃烧室中心为一凸芯平台（６），坡面（４）与活塞体顶面水平线夹角β＝２１°，坡面（４）通过过渡段Ｒ１＝２ｍｍ弧长与凹面（５）过渡面相接，凹面（５）过渡面与活塞体顶面水平线夹角δ＝１００°，凹面（５）的圆弧半径Ｒ３与凸芯夹角α端线及凹面（５）过渡面相切，坡面（４）外沿与活塞顶面过渡段的弧长Ｒ２＝２ｍｍ，活塞顶面设有进排气门凹坑（７）。
【技术特征摘要】
【专利技术属性】
技术研发人员：李志勇，陶海峰，湛学勇，冀国微，杨华桥，邢桂丽，
申请(专利权)人：东风朝阳柴油机有限责任公司，
类型：发明
国别省市：21
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