THE SIMULATION RESEARCHES ON THE WEAR FOR ELEMENTS OF THE SEAT INSERT-VALVE-VALVE GUIDE ASSEMBLY

The simulation researches have been carried out, where the object has been the elements of the insert seat – valve – valve guide assembly. The analysed valve has been driven magnetoelectrically. The aim of the researches has been to investigate the wear of elements of the assembly after 2*10 6 cycles. The analysed valve has been made of the TiAl6Zr4Sn2Mo2 alloy. The seat insert and the valve guide have been of cast iron. The special simulation model has been elaborated and presented in the article. It has been used the same geometrical and material parameters as for elements in the real assembly, in simulation model. During simulation, the needed valve lift profile has been introduced for valve drive. Than, basing on the control algorithm, the total force acting on the valve – drive assembly has been obtained and next parameters of motion for that assembly have been calculated. The special wear model for valve, valve guide and for seat insert has been elaborated and presented in the paper. It has been used the mentioned earlier parameters of motion. The other parameters of the model, such as the wear intensity has been obtained from short experimental series of 48*10 4 cycles made in the research stand. Results of such series have been presented in the paper. The results of simulation have been presented in the paper, either. The wear of valve guides has increased almost linearly and the wear of valve and of its seat insert has increased nonlinearly with the increase of cycle's number.