TURBOAUFLADUNG DER DIESELMOTOREN MIT INTENSIVER RÜCKKÜHLUNG

The study examines how the parameters of charged engine could be improved with reachable higher cooling grade of regenerative intercooler. With the investigation of real engine process, the peak pressure, the maximal temperature of cycle, the average heat load, the specific fuel consumption can be calculated at given main indicated pressure versus the cooling grade and the excess air factor, So it can be laid down as a fact that increasing the cooling grade is one of the important possibilities to improve the engine parameters. The presented scheme studies the possible layout

Compositions with superlinear deterministic top-down tree transformations

AbstractWe denote the class of deterministic top-down tree transformations by DT and the class of homomorphism tree transformations by HOM. The sign of a class with the prefix l- (sl-, nd-) denotes the linear (superlinear, nondeleting) subclass of that class. We fix the set M = HOM,sl-DT, l-DT, nd-DT, DT of tree transformation classes. Then consider the monoid [M] of all tree transformation classes of the form X1 O … OXm, where O is the operation composition, m ⩾ 0 and the Xi's are elements of M. As the main result of the paper, we give an effective description of the monoid [M] with respect to inclusion. This means that we present an algorithm which can decide, given arbitrary two elements of the monoid, whether some inclusion, equality or incomparability holds between them