The knowledge of the actual engaged gear is essential to achieve highquality control of an automotive power train. In cars equipped with manual gear shift, this information is not directly available. A hybrid observer for on–line identification of the actual engaged gear is proposed. Two hybrid models of an automotive driveline, a detailed one for verification and a reduced-order one for synthe...

Driveline oscillation is a significant concern in the context of hybrid electric vehicles (HEVs), because it can adversely affect vehicles’ sustainability. The reason for this that not only diminishes longevity components due to high mechanical contact stress but also results poor driving comfort, which turn reduces customer satisfaction. To address issue driveline effectively, two critical cha...

An investigation of the need of engine model complexity for use in powertrain control applications is presented in this paper. The engine studied is an SI-engine, but the analysis methods could easily be adapted to a CI-engine. The different engine models investigated are a cylinder-by-cylinder engine model and a mean value engine model. The way to evaluate the engine models is to compare the d...

The purpose of the proposed work centers on the unprecedented task of accurately estimating the torque transmitted through each clutch of the dual clutch transmission. This is to possibly improve the clutch control performance during vehicle launch and gearshifts and to elongate the clutch life. Such goal is attained by only using the measurements and data that are already available in current ...

The dynamics of an electromechanically actuated metal V-belt (Empact) CVT is analyzed by studying a simplified linear model of the actuation system and a driveline model which includes the slip dynamics of the variator. The actuation system shows several CVT ratio depending modes. Linearization of the slip dynamics shows that the location and, moreover, the damping of the modes depends signific...

Selection of transmission systems motor vehicles used on highways is high-ly important in terms fuel consumption and vehicle efficiency. In this study, effect using 3 different gearboxes a passenger car (automatic gearbox, CVT gearbox manuel gearbox) driveline friction losses engine operation interval by means GT SUITE modelling programme. The model formed has been simulated driving cycles (WLT...

Ventricular assist devices (VADs) have been shown to offer a significant survival benefit over medical therapy in patients with advanced heart failure. Despite significant advances in device technology and surgical technique, VAD-specific infections still remain among the most common causes of morbidity and mortality in patients with VADs. VAD-specific infections may involve the driveline exit ...

A distinctive feature of unmanned and conventional terrain vehicles with four or more driving wheels consists of the fact that energy/fuel efficiency and mobility depend markedly not only on the total power applied to all the driving wheels, but also on the distribution of the total power among the wheels. As shown, under given terrain conditions, the same vehicle with a constant total power at...