INVESTIGATION OF THE EFFECT OF COMPRESSION TEMPERATURE ON COMPUSTION IN A DIESEL ENGINE USING AN ATKINSON CYCLE PART Ⅰ. TESTS ON A TANGYE VCP1 ENGINE

摘要

A Tangye VCP1 engine was tested under high pressure, variable temperature charge conditions using both early and late inlet valve closing points to reduce the effective compression ratio. It was thus possible to obtain performance data over a range of compression temperatures lower than is feasible with a normal cycle. The results serve to show the effect of compression temperature on an engine with a high swirl, single-hole nozzle, combustion system.nThe theoretical gains expected from use of the modified Atkinson cycle were, however, not substantiated by the results.