Engine downsizing is a trusted method to reduce fuel consumption and pollution emitted from internal combustion engines. In this method, engine displacement volume reduced while maintaining the same power/torque characteristics. However, there still exist several limitations utilize technology. paper, naturally aspirated type of Iran national (EF7-NA) investigated for possible downsized version...

Introduction:Patients with the coronary slow flow phenomenon (SCF) frequently experience angina episodes. The purpose of this study was to determine efficacy of nicorandil in myocardial perfusion in patients with SCF. Methods: Twenty patients (50.85 ± 12.96 y) with SCF were studied.  We evaluate coronary slow flow according to protracted thrombolysis in m...

This paper develops an exhaust manifold pressure estimation method for a Diesel engine equipped with a variable geometry turbine (VGT) turbocharger. Extrapolated VGT data-maps are used directly for the estimation of the exhaust pressure using a noniterative Newton-Raphson based method suitable for real-time applications. This approach can give more accurate estimations than traditional methods ...

A mean value model of a diesel engine with VGT and EGR is developed and validated. The intended model applications are system analysis, simulation, and development of model-based control systems. The goal is to construct a model that describes the dynamics in the manifold pressures, turbocharger, EGR, and actuators with few states in order to have short simulation times. Therefore the model has...

Abstract Under on-engine operating conditions, a turbocharger turbine is subject to pulsating flow and, consequently, experiences deviations from the performance measured in gas-stand conditions. Furthermore, due high exhaust gases temperatures, heat transfer further deteriorates performance. The complex interaction of aerothermodynamic mechanisms occurring inside hot-side, and consequently beh...

Introduction: Myocardial perfusion imaging using gated SPECT and phase analysis is an effective tool in evaluation of mechanical dyssynchrony. The purpose of this study was to determine the normal ranges of global and regional phase parameters. Methods: A total of 100 patients with normal resting and stress electrocardiograms, low pretest likelihood for c...

This paper reports on the minimization of the average waiting time of the customers in the M/G/1 queue with vacation. Explicit formula for the unknown service parameter of a particular customer has been obtained by considering the exhaustive service discipline in the case of multi-user with unlimited service system. Moreover, results in case of partially gated and gated service disciplines unde...

This paper describes friction compensation based control of an industrial pneumatic actuator used for the variable geometry turbocharger (VGT). Adaptive LuGre model for friction has been used in this work. Friction force that is responsible for hysteresis and hunting phenomenon in the position control is compensated with two different control strategies designed to improve low velocity position...

This paper analyses unstable mode of a free gas turbine turboshaft helicopter engine TV3-117. The analysis is focused on the conditions this phenomenon and possibilities its solution in an industrial turbocharger with turbine. Knowing causes operation will allow pilots to prevent accidents increase level flight safety.