Patent ID: 8177016
Filing Date: 2012-05-15
Classification: B60K,B60L,B60T,B60W,B60Y,F01L,F02B,F02D,F02M,Y02T

Abstract:
1. A method for operating a hybrid internal combustion engine and air motor system comprising at least one chamber having a drivable member and at least one intake valve and at least one exhaust valve, and a reservoir connected to the chamber through at least one of the intake valve and the exhaust valve, comprising: in an air compressor mode of operation, calculating air compressor efficiency according to the following equation: and wherein dA=rate of change of A E=Internal energy of air in reservoir=f(m, T m=mass of air in reservoir=P T P V=Volume of reservoir at P R=gas constant E P V T S=Entropy of air in reservoir=f(P S POW=Engine brake power=N*T N=Engine speed (rev/time) T W=Engine brake work=POW dt dW=rate of change of W and selecting an intake and exhaust valve opening and closing timing sequence for maximizing air compressor efficiency so that