b'Engineer Innovation | AutomotiveOptimization of an Automotive Thermal Management SystemBy Fabrcio Thomaz, FCA Fiat Chrysler Automobiles, Cssio Chamone, Pontifcia Universidade Catlica de Minas Gerais, Gustavo Maia, PontifciaUniversidade Catlica de Minas Gerais, & Guilherme Tondello, Creative Solutions. Air pollution and the release ofengineering (CAE), can help reduceresult in much higher costs and greenhouse gases is a major concerndevelopment times and minimize thepossible schedule delays.for the automotive industry in Brazil.need for physical prototypes early in Following other national governments,the design process.One type of software used in cooling in 2012 the Brazilian Federalsystem design is 1D computational fluid Government established the InovarAs shown in Figure 1, decisions madedynamics (CFD). This type of tool is Auto program designed to provide taxearly in the design phase can have thevery helpful because it allows the benefits to car makers who met orbiggest impact on development whileanalysis of many system configurations exceeded certain efficiency goals. Thisdoing so at a low cost. If these changeswith low computational effort in a very program recently expired but has beenare recognized late the design this willshort amount of time. With Simcenter continued with the Rota 2030 program passed into law in 2018. As a result improved fuel economy and lower vehicle emissions will continue to be a focal point of automotive design in Brazil. For this reason it is critical to investigate a vehicles thermal management system. These systems play an important role in maintaining the proper operating temperature of the engine which is crucial to minimizing pollutants. However, these systems also consume a portion of the engines power and thus need to be designed as efficiently as possible. This need for balancing characteristics of the cooling system means the use of tools such as computer aidedFigure 2: Heat rejection mapDrive ScenariosTransm GearVehicle SpeedTowingGradeAmb. Temp.Coolant limit temp. A 2nd65% engine speed on peak powerNo9%30 C101 C B Max speed gear140 km/hNoMax30 C90 C C 2nd65% engine speed on peak powerYes6%40 C110 C D 1st65% engine speed on peak powerYes9%40 C110 C E 3rd89 km/hYes5.6%38 C110 C F Max speed gear160 km/hNo049 C110 C G Engine idling0 KM/HNo049 C110 C Table 1. Drive scenarios24'