2000 



50 100 



TIME STEP (MS) 



200 



POPPET DP (K) FIXTURE DP 



KICKER (K) 



(a) Cycling - grooved poppet, with spring. 



2000 



50 100 



TIME STEP (MS) 



200 



POPPET DP (K) 



FIXTURE DP 



KICKER (K) 



(b) Cycling - smooth poppet, with spring. 



Figure 6 

 Graph of dynamic test for grooved and nongrooved poppet seat. 



18 



