Injection technologies - the rivalry intensifies

摘要

Common rail fuel system technology has, until now, been tainted in a heavy-duty truck and bus diesel context with an image of questionable component durability. Meanwhile, for transport companies whose annual fuel bills can tilt the balance between survival and insolvency, small percentage point differences in fuel efficiency increasingly influence vehicle purchasing/leasing decisions. And when it comes to wringing the best possible fuel economy from a big diesel, under the ever more rigorous constraints of emissions legislation, common rail's maximum injection pressure limitations have put it at a disadvantage against engine camshaft driven unit-injector and so-called unit-pump systems.