Piston Temperature of Automobile Gasoline Engine in Driving on the Road

Abstract

A new linkage device has been developed for the measurement of piston temperatures in high speed engines with a high degree of accuracy and long durability. The piston temperatures have been successfully measured under various driving conditions on ordinary roads by this device. As a result of comparing these temperatures with the laboratory ones we reached the following conclusion : i) During driving, piston tmeperatures fluctuate, responding rapidly to changes in engine conditions. The temperatures change frequently and large over a range of 100°C, particularly on highways.ii) During acceleration, the longer the "knock" persists, the more the temperature rises. In this case, the highest temperature recorded is about 340°C.iii) Generally, the temperatures obtained nearly steady state conditions on the road agree well with those obtained in the laboratory.