A condition identifying method of the piston-cylinder-ring assembly of inter-combustion engine based on evidence theory

摘要

A condition identifying method of the piston-cylinder-ring assembly of internal-combustion engine based on evidence theory is expounded. At first, author established an experimental system to acquire crankcase pressure signal and vibration acceleration signal. Then, author abstracted characters of the signals to build model specimen. and experimentation specimen to identify the operation condition of internal-combustion engine by the method of the evidence theory. The conclusion shows that it is effective and feasible to identify the condition of the piston-cylinder-ring assembly by fusing the crankcase pressure signal and vibration acceleration signal of the engine block with the method of the evidence theory.