Turbocharger is a high speed rotor system supported by a pair of floating ring bearings which comprise of double oil films. The stability of its rotor system is governed by not only the structure of the rotor but also by the nonlinear hydrodynamic force of two oil films. In this paper, a lumped dynamics model is developed for a turbocharger rotor system. In order to investigate the nonlinear be...

Abstract— A non-linear four state-three input mean value engine model, incorporating the important turbocharger dynamics, is used to study optimal control of a diesel-electric powertrain during transients. The optimization is conducted for two different criteria, both time and fuel optimal control, and both engine speed and output power are considered free variables in the optimization. The tra...

Optimal control policies for a diesel-electric powertrain in transient operation are studied. In order to fully utilize the extra degree of freedom available in a diesel-electric powertrain, compared to a conventional powertrain, the engine-speed is allowed to vary freely. The considered transients are steps from idle to target power. A non-linear four state-three input mean value engine model,...

Despite negative perspectives on their consequences, gated communities continue to spread in cities due to structural reasons such as globalization and economic neo-liberalism. Hence, there is a need to seek for a way of achieving a balance and make these communities livable. Due to agreement with economic market perspectives, livability principles might offer a solution for mediating the socia...

We develop novelty detection techniques for the analysis of data from a large-vehicle engine turbocharger in order to illustrate how abnormal events of operational significance may be identified with respect to a model of normality. Results are validated using polynomial function modelling and reduced dimensionality visualisation techniques to show that system operation can be automatically cla...

Increasingly complex air path concepts are investigated to achieve a substantial reduction in fuel consumption while improving the vehicle dynamics. One promising technology is the two-stage turbocharging for gasoline engines, where a high pressure and a low pressure turbocharger are placed in series. For exploiting the high potential, a control concept has to be developed that allows for coord...

In order to meet tight emission limits Diesel engines are nowadays equipped with additional hardware components like an exhaust gas recirculation valve and a variable geometry turbocharger. Conventional engine control units use two SISO control loops to regulate the exhaust gas recirculation valve and the variable geometry turbocharger, although their effects are highly coupled. Moreover, these...

Objectives in terms of pollutant emissions and fuel consumption reduction, as well as development costs and time to market reduction, has led car manufacturers to use more and more system simulation. However, among all the fields in which it has enabled to achieve these goals, the control development stage is one of those, in which major improvements can still be achieved. In this context and w...

Salah satu permesinan yang sangat vital dalam operasional kapal berlayar maupun bongkar muat yaitu Auxiliary Engine (Diesel engine generator). Fungsi mesin tersebut sebagai penggerak generator untuk menghasilkan listrik bagi kebutuhan di kapal. Diesel auxiliary memiliki komponen penting antara lain : pompa bahan bakar, turbocharger, air starting motor, intercooler, dan sebagainya. dari diesel a...