Patent ID: 8528329
Filing Date: 2013-09-10
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method for controlling emissions during low-load diesel engine operation, the engine comprising at least one piston movable in a cylinder between a top dead center and a bottom dead center position, a fuel injector for injecting fuel into the cylinder, and a variable geometry turbine through which exhaust from the engine is adapted to flow, the method comprising: operating the engine at low load; controlling a variable geometry turbine inlet opening size so that NOx emission levels are controlled while the engine is operated at low load, wherein variable geometry turbine inlet opening size is reduced to 0-7.5% of maximum turbine nozzle gap, and reducing hydrocarbon and particulate matter emissions by advancing fuel injection from a position before top dead center of the piston.