GE Transportation has developed a new family of diesel engines to meet the challenge of high power, low weight and new emissions requirements in lightweight locomotives. The first member of the family is a 16 cylinder engine that runs at 1500 rpm and produces 2750 kW. Future models include a 12 cylinder engine rated at 2060 kW and adaption of the engine for marine and power generation. The PowerHaul engines were derived from the successful Series 6 Jenbacher gas engines. The strength of the gas engine was retained, and state of the art fuel injection, turbocharging and combustion systems were applied. A high pressure common rail system gave the flexibility to optimize the NO(x)-fuel consumption tradeoff, while minimizing PM. The engine uses high pressure ratio, single stage turbochargers to supply air to support the moderate Miller Cycle combustion system. A moderate Miller Cycle inlet valve closing was employed to retain simple matched turbochargers and a conventional valve train while maintaining good acceleration and low power performance. The combustion processes were modeled and calibrated on a single cylinder research engine to evaluate several combinations of piston crown, valve timing, boost level and fuel injection nozzle geometry. This allowed a single set of multicylinder hardware to be built and directly meet the targets for power, emissions and fuel consumption. The 16 cylinder engine has been certified to EU IIIa emissions levels. The base structure of the engine was modified to couple closely to a locomotive alternator and to drive the lubricant and cooling pumps necessary for the locomotive cooling system. The engine is elastically mounted in the locomotive to reduce vibration transfer, but resist the shock loads experienced in locomotive applications. The engine as a whole and its major parts were validated for locomotive service by extensive component and engine endurance tests. The engine was qualified with 10% overspeed and 20% overload levels. A special load cycling test was performed to qualify the engine for highly cyclic locomotive service. The first application of the 16 cylinder PowerHaul engine will be in the PH37ACmi locomotive for the Freightliner rail system in the UK. It represents a new standard for power, emissions, haulage, and fuel consumption in lightweight locomotive markets.
GE PowerHaul Diesel Engine Development
2010
10 Seiten, 17 Bilder, 1 Tabelle, 2 Quellen
Conference paper
Storage medium
English
Engineering Index Backfile | 1928
GERMAN DIESEL-ENGINE DEVELOPMENT
SAE Technical Papers | 1947
|European diesel engine development
Engineering Index Backfile | 1929
|Development of marine diesel engine
Engineering Index Backfile | 1938
|American marine diesel engine development
Engineering Index Backfile | 1941