in the first part of this paper, some theorems are given for a riemannian manifold with semi-symmetric metric connection. in the second part of it, some special vector fields, for example, torse-forming vector fields, recurrent vector fields and concurrent vector fields are examined in this manifold. we obtain some properties of this manifold having the vectors mentioned above.

An investigation into the isolability of the location of intake and exhaust manifold leaks in heavy duty diesel engines is presented. In particular, established fault detection and isolation (FDI) methods are explored to assess their utility in successfully determining the location of a leak within the air path of an engine equipped with exhaust gas recirculation and an asymmetric twin-scroll t...

The flexibility of a crankshaft exhibits significant nonlinearities in the analysis diesel engines performance, particularly at rotational speeds around 2000 rpm. Given explainable mathematical trends analytical model and lack available modeling intake manifold with flexible crankshaft, present study develops validates such model. In paper, mass flow rate air that goes from into all cylinders e...

In this paper, an almost new control approach called terminal synergetic control which works based on user defined manifold is applied to a nonlinear helicopter model. Stability analysis is convestigated using Lyapunov stability theory. Synergetic controller is applied to this nonlinear fifth-order helicopter model to control height and angle. Simulation results showed that it has faster and sm...

Many model based solutions to diagnosis problems in SIengines have been discussed in literature. However most presented methods are useful only for a specific class of faults. Here a systematic and more general method is presented. With this method, which is based on a structure of hypothesis tests, it is possible to diagnose a large variety of different types of faults. The method is applied t...

Untuk menghasilkan suatu kerja yang optimal dari mesin bensin, maka diharapkan pencampuran bahan bakar dengan udara terjadi sempurna sesuai kebutuhan salah satu cara optimalisasinya adalah menggunakan metode injeksi ke intake manifold. Adapun analisa proses Computational Fluid Dynamics dapat dilakukan program ANSYS FLUENT. Penelitian memodelkan model injektor persamaan matematis serta menjadika...

A detailed developmental practices theoretical and experimentally investigated by various researchers during 2016-2011 years are presented in this review paper. Intake manifold box was optimized using Frontier TM software using different pressur conditions.