An optimized two-stroke internal combustion diesel engine, suitable for locomotive applications, has been developed to meet the EPA locomotive Tier 2 emission standards. To achieve a low emission target below the EPA Tier 2 standards for NOx (5.5 g/bhp-hr) and particulates (0.2 g/bhp-hr), several innovative changes have been made to the engine. These changes include: a new piston bowl geometry; low oil consumption piston rings; optimized surface finish cylinder liner; optimized fuel injection camlobe; modified fuel injector nozzle; new efficient aftercooler; optimized oil separator; and optimized turbocharger.
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机译：为了满足EPA机车Tier 2排放标准，已经开发了一种适用于机车的优化二冲程内燃机柴油发动机。为了实现低于EPA Tier 2标准的NOx（5.5 g / bhp-hr）和颗粒物（0.2 g / bhp-hr）的低排放目标，发动机进行了几项创新性的更改。这些变化包括：新的活塞碗几何形状;低油耗活塞环;优化的表面光洁度气缸套;优化的燃油喷射凸轮凸角;改进的喷油嘴新的高效后冷却器;优化的油分离器;和优化的涡轮增压器。
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