INFLUENCE OF LOAD ON LINER TEMPERATURE AND WEAR IN A HIGH SPEED DIESEL ENGINE.

Abstract

Wear testsconducted with high speed diesel engines indicated that enginesrunning on varying loads suffered more wear than engines running on full load most of the &me. It was suspected that the increased wear was due to increased corrosion caused by low liner temperatures at part load condtions. To verify this, liuer temperatures were measured in a single cylinder high weed diesel engine runatvarious loads, coolant outlet temperature: and rates 01 coolant circulation.It is concluded from these experiments that, for the coolant outlet temperatures currently employed in high speed diesel engines, the liner temperature will be low enough at part loads to cause increased corrosive wear. This can be countered by employing coolant temperatures of the order of 105-110' C. which can be obtained in a closed cycle coolant system by moderate pressurisation of 5-10 psig.