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Engine operating method and piston having non-reentrant combustion bowl and anti-sooting ramp
Engine operating method and piston having non-reentrant combustion bowl and anti-sooting ramp
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机译:发动机操作方法和活塞具有非倒退燃烧碗和抗烟灰坡道
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摘要
Operating an internal combustion engine includes conveying fuel of spray plumes of directly injected fuel out of a swirl pocket in a combustion bowl in a piston, and impinging the fuel upon an anti-sooting ramp transitioning between a radially inner shelf surface of the combustion bowl and a radially outer squish surface of the piston. The shelf surface is spaced an axial distance (FA) from a plane defined by the squish surface that is from 1% to 2% of an outer diameter (OD) dimension of the piston. Impinging the fuel upon the anti-sooting ramp directs the fuel upwardly from the squish surface to limit wall-wetting in the combustion cylinder.
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