tailieunhanh - Introduction to Modeling and Control of Internal Combustion Engine Systems P2

In heavy-duty applications, where fuel economy is a top priority, lean deN Ox systems using a selective catalytic reduction (SCR) approach are an interesting alternative. Such systems can reduce engine-out N Ox by approximately one order of magnitude. This permits the engine to be calibrated at the high-efficiency/low-PM boundary of the trade-off curve (see Fig. , early injection angle). The drawback of this approach is, of course, the need for an additional fluid distribution infrastructure (most likely urea). While such systems are feasible in heavy-duty applications, for passenger cars it is generally felt that a solution with Diesel particulate filters. | Structure of the Text 19 In heavy-duty applications where fuel economy is a top priority lean de-NOX systems using a selective catalytic reduction SCR approach are an interesting alternative. Such systems can reduce engine-out NOX by approximately one order of magnitude. This permits the engine to be calibrated at the high-efficiency low-PM boundary of the trade-off curve see Fig. early injection angle . The drawback of this approach is of course the need for an additional fluid distribution infrastructure most likely urea . While such systems are feasible in heavy-duty applications for passenger cars it is generally felt that a solution with Dion l particulate filters DI IT is more likely to be successful on a latge scate. These hitara pernht ua I liirnr calibration on the higiwlfilUI v rti side of tan I luolr-Ci. Usmg tMs approach engine-out NOX eirnsafons too lu pl whMn sht lu slatiow hmhu by usmg firrh1 EGR rates but wity ca any astlieii after-tresdmunt systems. Radically new ipijotrisEn. cucli as ookMamt csmbuttfon sat e. 1th or homogeneous-chat csmpreteion .gnition onginas dK Cb sea .87 Da . 172 for control-oriented diacutnianl promise hsrthee teduatfoes in oogmw-out emissions especialln tt pail-bmd aoodhioor. In all of these a roaclies feedforwntt1 and icadbiick coi-toI svsI eiiit wil. play an important eola so so rraalcyc Irclmoloyv. Moteoser. with evsr increasing system compfoxhy model-tened sppaiwlow -wil. bsaoioa evun more important. Structure of the lexs The main body of this teat is organizaii ts follows. t Chapter 2 introili-cat mouiiiikiliio111 moWelo of the i e cut ouawithl phenam-ena in IC enginea. Chapter 3 derives discrete-event or crank-angle models for those subsystems that will need such descriptions to be properly controlled. Chapter 4 discusses some important control ToWems by applying a modelbased approach for the design of feedforward as well as feedback control systems. In addition to thesa toree chastest thu tores .