Dynamic Analysis Optimization and Experimental Verification of Hydraulic Tappet Valve Train
Taking the valve train of a high-strength diesel engine as the research object,the original mechanical tappet was changed to a hydraulic tappet,a new state cam profile was designed,and the structure of the valve train was improved.Based on AVL EXCITE Timing Drive software,the dynamic model of the hydraulic tappet valve train was established,and the dynamic analysis was carried out.Combined with the actual working conditions,the reliability test of the whole machine was carried out in the full speed range.The results show that the hydraulic tappet valve train works stably and runs well,and the valve sinking after the test is significantly re-duced compared to the mechanical state valve train.The improvement effect of the hydraulic tappet valve train on the wear of the valve-valve seat ring of the high-strength diesel engine is verified,which can provide a reference for the design of the valve seat wear reduc-tion scheme.
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