The Development of the Engine Vibration Test System Based on Labview

When the automobile engine runs wrong,the vibration amount of its connection parts will have the aggrandizement of different degree,By means of inspecting the vibration amount of the engine on running,its appearance and fault could be diagnosed.Because of traditional inspection instrument having the great investment and worse examination accuracy and credibility etc,it would be very restricted in actually apply.Aimming at present inspection condition,basing on the advanced virtual instrument technique and depending on the basic hardware of the sensors,signal condition manager and the data sample card,we applied the software of NI LabVIEW to programme acquisition and process procedure of the vibration data and developed the engine vibration test system,when applying the system in studding the relationship between tightening torque of bolts set on cylinder cap and vibration of engine body,the optimum range of bolts tightening torque corresponding to lower engine body vibration amount was found out,the tightening torque was tally with the one that engine manufacturer recommended.thus the feasibility and validity of the vibration test system was verified,this would provide a new method and approach for engine vibration test,and also provide the reference for similar test and correlative analysis of other machines.