Most vehicle transmission systems control the ratio between engine speed and wheel speed using a fixed number of metal gears; the Continuously Variable Transmission (CVT) in currently available vehicles utilize a pair of variable-diameter pulleys connected by a belt or chain that can produce an infinite number of engine/wheel speed ratios for improve fuel consumption, drivability effectively, a...

The method for solving an optimal design problem under uncertainty depends on how the latter is quantified. When sufficient information is available the popular probabilistic approach can (and should) be adopted. In reality however, we often do not have sufficient data to infer appropriate probability distributions for the uncertain quantities modeled as random variables. The amount of availabl...

This study applied a model predictive control (MPC) framework to solve the cruising control problem of a series hydraulic hybrid vehicle (SHHV). The controller not only regulates vehicle velocity, but also engine torque, engine speed, and accumulator pressure to their corresponding reference values. At each time step, a quadratic programming problem is solved within a predictive horizon to obta...

A model based control scheme is designed to regu late the cylinder air charge of a camless multicylinder engine for unthrottled operation The controller con sists of a feedforward and an adaptive feedback scheme based on a control oriented model of the breathing process of an engine equipped with electro hydraulic springless valve train The nonlinear control scheme is designed to achieve cylind...

Abstract It is envisaged that future civil aero-engines will operate with ultra-high bypass ratios to reduce the specific fuel consumption. To achieve expected benefits from new engine cycles, these powerplants may mount compact nacelles. For configurations aerodynamic coupling between powerplant and airframe increase. this reason, it required quantify further understand effects of aircraft int...

Abstract This paper presents experimental and numerical CFD studies of the aerodynamics a turbine rear structure (TRS). The TRS test geometry is an engine-realistic state-of-the-art design with polygonal outer case, recessed engine mount bumps, three different vane types: regular vanes, bump vanes in sectors, thick vanes. Using sector types simultaneously was found to be crucial for inlet bound...

1B-2 Modeling and Control of an Alternative Steering System for Hybrid Vehicles Pradeep Setlur, Val Mills, Dr. John Wagner, and Dr. Darren Dawson Hybrid vehicles integrate an electric motor with accompanying battery pack and generator, an internal combustion engine, and potentially fuel cells to acquire greater fuel economy and reduced emission levels. Automotive subsystems such as hydraulic po...

A range of continental-scale soil datasets exists in Europe with different spatial representation and based on different principles. We developed comprehensive pedotransfer functions (PTFs) for applications principally on spatial datasets with continental coverage. The PTF development included the prediction of soil water retention at various matric potentials and prediction of parameters to ch...

Present day jet engines are controlled and monitored by a series of hydraulic, fueldraulic, electrical and pneumatic sub-systems known as the Full Authority Digital Engine Controller (FADEC). At the heart of the FADEC lies a centralised Electronic Engine Controller (EEC) responsible for control and safety of the wider engine system. It has long been postulated that a distributed EEC would contr...