Patent ID: 7433777
Filing Date: 2008-10-07
Classification: E02F,F02D,Y02T

Abstract:
1. An engine protection system for a construction machine, said system comprising revolution speed detecting means for detecting a revolution speed of an engine mounted in the construction machine, a plurality of cylinder temperature detecting means for detecting exhaust temperatures of respective cylinders of said engine, storage means for storing the detected engine revolution speed and the detected exhaust temperatures of the respective cylinders while keeping temporal relationship, and control means for outputting a display signal computed based on the stored data; wherein said control means includes trend data processing means for extracting, from the stored data, the exhaust temperature of each cylinder at a predetermined engine revolution speed, computing at least one of an average value and a standard deviation of the exhaust temperature of each cylinder per a predetermined time based on the extracted data, producing and storing trend data representing time-varying changes of at least one of the average value and the standard deviation of the exhaust temperature of each cylinder, and outputting a display signal for displaying the produced trend data to the outside of the construction machine.