Validated Analytical Modeling of Diesel Engines Intake Manifold with a Flexible Crankshaft

The flexibility of a crankshaft exhibits significant nonlinearities in the analysis diesel engines performance, particularly at rotational speeds around 2000 rpm. Given explainable mathematical trends analytical model and lack available modeling intake manifold with flexible crankshaft, present study develops validates such model. In paper, mass flow rate air that goes from into all cylinders engine has been analytically modeled. models gas speed dynamics have validated using case studies ORNL EPA Freeway standard drive cycles showing relative error 7.5% 11%, respectively. Such values are on average less than those widely recognized this field, as GT-Power CMEM, A simplified version for control applications developed based sensitivity analysis. It found decreases cylinders, resulting an unfavorable higher exhaust emissions like CO. also pressure inside cylinder during stroke four elements: driving element (intake pressure) draining elements (vacuum losses inertial effect rotating mass). least amongst these is vacuum results piston’s inertia acceleration. largest drop takes place because air/gas losses. These valid so they can help better analyzing performance engines.