PASSING THE FIRST TESTS - Cummins Tier 4 interim field test program exceeds 20,000 hours; fuel economy increases up to 5% seen

摘要

While engine and equipment manufacturers have gotten very good at verifying the performance of new engines in the lab, there is still no substitute for getting them out into machines running in the dirt. It is, in the immortal words of one engineer, "still the only way you can find all the snakes hiding under the rocks." Faced with what is generally considered the most significant technical challenge in the history of the off-highway engine industry - the coming implementation of the EPA Tier 4 interim and EU Stage 3b engine emissions standards - Cummins first responded by developing the most advanced nonroad engine systems in its history.