Diesel and Dual Cycles Air Standard Diesel Cycle for CI Engines: k p 3 s=const Qin p=const 4 v=const s=const Qout 1 V1=V4 ---。。-1 S1=S2 S3=S4 Define:ir ="cutoff ratio"compression ratio r= V2 上游充通大率 May15,2018 2 SHANGHA BAO TONG LINIERSITYMay 15, 2018 2 Diesel and Dual Cycles Air Standard Diesel Cycle for CI Engines: qout s T 1 2 4 3 s 1=s 2 s 3=s 4 qin qout V p 1 2 4 3 V 1=V 4 qin V 2 V 3 3 1 BDC c 2 2 TDC V V V Define : r " " compression ratio r V V cutoff ratio V   