Synchronous Thermal Instability Evaluation of Medium Speed Turbocharger Rotor-Bearing Systems Brian R. Carroll Rotors in fluid-film bearing supported turbomachinery are known to develop elliptical orbits as a result of rotor-bearing interactions, mass unbalance within the rotor, gravitational bending of the shaft and external excitation. In synchronous whirl, where the speed at which the shaft ...

As a result of the analysis statistics on main failures turbocharger tractor engines in agricultural production, it can be concluded that is condition its bearing node, first place, determines performance entire turbocharger. This ultimately affects duration rotor after engine stops. The article considers method determining rotation time by inertia depending following factors: pressure drop gre...

Adapting turbocharger performance maps to a form suitable for dynamic simulations is challenging for the following reasons: (1) the amount of available data is typically limited, (2) data are typically not provided for the entire operating range of the compressor and turbine and (3) the performance data are non-linear. To overcome these challenges, curve fits are typically generated using the p...

A mean-value model of a diesel engine with a variable-geometry turbocharger (VGT) and exhaust gas recirculation (EGR) is developed, parameterized, and validated. The intended model applications are system analysis, simulation, and development of modelbased control systems. The goal is to construct a model that describes the gas flow dynamics including the dynamics in the manifold pressures, tur...

ABSTRAK Dunia otomotif di Indonesia semakin berkembang dengan pesat, jenis-jenis motor baru dari berbagai pabrikan bermunculan pesat. Salah satu jenis yang berteknologi cukup baik adalah YAMAHA V-IXION. Tipe ini memiliki teknologi dasar mobil yaitu injector bahan bakar dan ECU (Electronic Controller Unit) sebagai penerapan engine mapping. Untuk menambah tenaga motor, dilakukan pemasangan turboc...

There is a growing concern about the feasibility of new generation internal combustion engines in low-temperature and efficient way that can meet emission regulations while maintaining desirable power performance. This requires controllability flexibility over ignition reactivity within cylinder by handling two fuels with different chemical reaction intensity. In this research, controlled compr...

Turbocharger development and production at MTU Turbocharging is an integral component of the engine design concept. It shapes the characteristics of the engine more than almost any other system, as it affects its economy, dynamics and emission characteristics. This is why turbocharging is one of MTU’s key technologies. MTU has a tradition of maintaining the expertise for developing and producin...

Due to the complexity of the ship's systems early detection and isolation of the faults is of the essential importance for realization of a safe operation and necessary level of functionality. In this paper the main objectives of fault diagnosis are presented, such as detection, isolation and faults analysis. By simulating the appropriate faults in the turbocharger of the marine two stroke dies...

Internal combustion engine (ICE) exhaust gases provide a high amount of energy which is partially lost to the environment. Such can be recovered with turbocharger turbine or other after-treatment device. As flow varies not only load but also opening and closing valves, proper matching between should established maximize recovery waste energy. That why twin-scroll dual turbocharging system imple...

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 myocardial infarction (timi) frame count....