Ex Parte Chen et al - Page 3



            Appeal 2007-0571                                                                                
            Application 10/277,004                                                                          
                         prevent backflow from the intake manifold and backflow                             
                         from the first divided exhaust manifold from entering the                          
                         second divided exhaust manifold.                                                   

                         16. A method comprising the steps of:                                              
                         receiving, at boost pressure, a flow comprising air and                            
                         exhaust gas at a plurality of cylinders into a first divided                       
                         exhaust manifold;                                                                  
                         expelling exhaust gas from a second subset of the                                  
                         plurality of cylinders into a second divided exhaust                               
                         manifold, wherein the first subset and the second subset                           
                         are different;                                                                     
                         receiving, by an exhaust gas recirculation (EGR) system                            
                         at an EGR inlet, a part of the exhaust gas from the first                          
                         divided exhaust manifold and a part of the exhaust gas                             
                         from the second divided exhaust manifold;                                          
                         when the boost pressure is higher than exhaust pressure                            
                         at one or more of the first divided exhaust manifold and                           
                         the second divided exhaust manifold, inhibiting all                                
                         backflow from entering the first divided exhaust                                   
                         manifold and the second divided exhaust manifold.                                  

                                            THE REJECTIONS                                                  
                   The Examiner relies upon the following as evidence of unpatentability:                   
                    Faletti                  US 6,408,833 B1               Jun. 25, 2002                    
                    Bailey                   US 6,598,396 B2                Jul. 29, 2003                   
                    Sumser                   US 6,694,735 B2               Feb. 24, 2004                    




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