A STUDY OF ENGINE OILS AT LOW TEMPERATURES IN AN IMPROVED CRANKING APPARATUS

Abstract

Features of low temperature cranking device constructed at General Motors Research Laboratories which incorporates advantages of dynamometer-type drive and yet permits cranking with starting motor; engine can be cranked with engine starter motor or electric motor-transmission drive; torque and speed can be measured directly with either system; results obtained with various cranking techniques on commercial engine oils and reference base oil.