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...

This paper describes a method for constructing a model of normal system state for the purpose of providing continuous condition monitoring of an aerospace gas-turbine engine. We show how the model can be visualised in 2D to allow an intuitive identification of abnormal engine and how periods of abnormal engine condition can be identified by means of a novelty score. This approach is illustrated...

This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 t...

performance analysis of jet engines in various environmental conditions is important and is the first step in the design of such engines. in this paper, the performance of a typical turboprop engine was modeled in the commercial software gasturb10 and the obtained results are validated at three flight regimes take off, military and 100% normal using engine test results. performance analysis of ...

MORIOKA Noriko : Manager, Control Systems Engineering Department, Research & Engineering Division, Aero-Engine & Space Operations KAKIUCHI Daiki : Control Systems Engineering Department, Research & Engineering Division, Aero-Engine & Space Operations OZAWA Kanji : Manager, Engine Technology Department, Research & Engineering Division, Aero-Engine & Space Operations SEKI Naoki : Engine Technolog...

The paper presents the results of modelling thermal cycle of internal combustion engine including exhaust gas recirculation. The test engine can not achieve the optimum parameters of work due to occurrence of the knock combustion. The influence of EGR on the limits of the knock occurrence in the engine was studied. It turned out that few percent of exhaust gases in the fresh charge effectively ...