ENGINE CONTROL

This paper describes the development of the control system for the electronic ignition and injection of a 4-stroke mono-cylinder internal combustion engine. It is pretended to control the ignition advance and the injection time and period. The fuel mass flow rate is controlled using the air mass flow rate into the cylinder.

This paper presents the design and first test on a simulator of a vehicle trajectory-planning algorithm that adapts to traffic on a lane-structured infrastructure such as highways. The proposed algorithm is designed to run on a fail-safe embedded environment with low computational power, such as an engine control unit, to be implementable in commercial vehicles of the near future. The

This paper documents the case of the aircraft engine control system. It aims to offer a detailed picture of the dynamics of the technological capabilities of aircraft engine manufacturers in relation to a specific and increasingly important engine subsystem, namely the control system. It draws on a combination of detailed qualitative and quantitative data to construct two measures of firms'

Industrial manufacturing processes can experience a variety of changes to important quality characteristics as a result of tool breakage, tool wear, introduction of new raw materials, and other factors. Statistical process control charts are often used to monitor for changes in quality characteristics for manufacturing processes. The control chart computes a statistic based on measured observations of the process and

The present paper describes the results of an experimental study performed burning alternative fuels, different per quality and feedstock, in a modern diesel engine compliance the Euro 5 emission standards. Three alternative fuels were tested on the engine and compared with a reference fossil fuel in terms of combustion characteristics, fuel consumption, noise and emissions. The alternative fuels were two

Land degradation by soil erosion is one of the most serious problems and environmental issues in many ecosystems of arid and semi-arid regions. Especially, the disturbed areas have greater soil detachability and transportability capacity. Evaluation of land degradation in terms of soil erodibility, by using geostatistical modeling, is vital to protect and reclaim susceptible areas. Soil erodibility, described as the ability of soils to resist erosion, can be measured either directly under natural or simulated rainfall conditions, or indirectly estimated by empirical regression models. This study compares three empirical equations used to determine the soil erodibility factor of revised universal soil loss equation prediction technology based on their geospatial performances in the semi-arid catchment of the Saraykoy II Irrigation Dam located in Cankiri, Turkey. A total of 311 geo-referenced soil samples were collected with irregular intervals from the top soil layer (0–10 cm). Geostatistical analysis was performed with the point values of each equation to determine its spatial pattern. Results showed that equations that used soil organic matter in combination with the soil particle size better agreed with the variations in land use and topography of the catchment than the one using only the particle size distribution. It is recommended that the equations which dynamically integrate soil intrinsic properties with land use, topography, and its influences on the local microclimates, could be successfully used to geospatially determine sites highly susceptible to water erosion, and therefore, to select the agricultural and bio-engineering control measures needed.

The race for engine consumption and pollutant emission reduction requires engines development time reduction and optimisation. These problems bring engine test bed to become measuring systems more and more powerful and versatile. This test bed functionalities enrichment drives automation system evolutions. One of these is the integration of real time simulation execution in MORPHEE 2 which makes it possible to the engine control engineers to anticipate control strategies development. We will see in this document that real time simulation execution on a test bed from its automation system makes possible to accurately reproduce road load cycles like NEDC, FTP, … This constitutes an essential tool for engine transient calibration. In a second time we will see that the use of a vehicle refined model permits to reproduce on the test bed the transmission dynamics of this vehicle. This kind of simulation in an engine test bed allows evaluating driveability's engine control strategies.

Theoretical models play an important role in the design of engine control and diagnostic systems, allowing to reduce development time and costs. The paper describes a control-oriented theoretical model for the simulation of an automotive Diesel engine built up using a "simulation library" developed in Simulink environment. Library blocks, defined for engine components and subsystems, were assembled together in a Mean Value Engine Model (MVEM) of a typical automotive Diesel engine, with Common Rail injection system, waste-gated turbine and EGR. Simulation results were compared with experimental data (both in steady and transient conditions) showing a good agreement. The model satisfactorily estimated engine behaviour both in steady and transient operation with very short calculation times.

Advanced model-based control architecture overcomes the limitations state-of-the-art engine control and provides the potential of virtual sensors, for example for thrust and stall margin. "Tracking filters" are used to adapt the control parameters to actual conditions and to individual engines. For health monitoring stand- alone monitoring units will be used for on-board analysis to determine the general engine health and detect and isolate sudden faults. Adaptive models open up the possibility of adapting the control logic to maintain desired performance in the presence of engine degradation or to accommodate any faults. Improved and new sensors are required to allow sensing at stations within the engine gas path that are currently not instrumented due in part to the harsh conditions including high operating temperatures and to allow additional monitoring of vibration, mass flows and energy properties, exhaust gas composition, and gas path debris. The environmental and pe...