Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole最新文献_第4页

Design Methodology of Camshaft Driven Charge Valves for Pneumatic Engine Starts 气动发动机启动用凸轮轴驱动充气阀设计方法

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2012-01-01 DOI: 10.2516/OGST/2013207

Michael M. Moser, Christoph Voser, C. Onder, L. Guzzella

{"title":"Design Methodology of Camshaft Driven Charge Valves for Pneumatic Engine Starts","authors":"Michael M. Moser, Christoph Voser, C. Onder, L. Guzzella","doi":"10.2516/OGST/2013207","DOIUrl":"https://doi.org/10.2516/OGST/2013207","url":null,"abstract":"Idling losses constitute a significant amount of the fuel consumption of internal combustion engines. Therefore, shutting down the engine during idling phases can improve its overall efficiency. For driver acceptance a fast restart of the engine must be guaranteed. A fast engine start can be performed using a powerful electric starter and an appropriate battery which are found in hybrid electric vehicles, for example. However, these devices involve additional cost and weight. An alternative method is to use a tank with pressurized air that can be injected directly into the cylinders to start the engine pneumatically. In this paper, pneumatic engine starts using camshaft driven charge valves are discussed. A general methodology for an air-optimal charge valve design is presented which can deal with various requirements. The proposed design methodology is based on a process model representing pneumatic engine operation. A design example for a two-cylinder engine is shown, and the resulting optimized pneumatic start is experimentally verified on a test bench engine. The engine’s idling speed of 1200 rpm can be reached within 350 ms for an initial pressure in the air tank of 10 bar. A detailed system analysis highlights the characteristics of the optimal design found.","PeriodicalId":19444,"journal":{"name":"Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole","volume":"4 1","pages":"179-194"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76988087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A Powertrain LQR-Torque Compensator with Backlash Handling 动力总成lqr -扭矩补偿器与反弹处理

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-07-01 DOI: 10.2516/OGST/2011147

Peter Templin, B. Egardt

引用次数: 35

Kinetic Modeling of Dynamic Aspects of the Standard NH3-SCR Reaction Over V2O5-WO3/TiO2 and Fe-Zeolite Commercial Catalysts for the Aftertreatment of Diesel Engines Exhausts V2O5-WO3/TiO2和fe -沸石商用催化剂上标准NH3-SCR反应动力学方面的动力学建模

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-07-01 DOI: 10.2516/OGST/2011132

I. Nova, M. Colombo, E. Tronconi

引用次数: 20

Model-Based Throttle Control using Static Compensators and Pole Placement 基于模型的基于静态补偿器和极点配置的节流阀控制

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-07-01 DOI: 10.2516/OGST/2011137

Andreas Thomasson, L. Eriksson

引用次数: 19

Control Oriented Model of a Variable Geometry Turbocharger in an Engine with Two EGR Loops Modélisation de compresseur à géométrie variable dédiée au contrôle pour un moteur avec deux boucles EGR 用于控制带有两个EGR回路的发动机的可变几何涡轮增压器的控制导向模型

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-07-01 DOI: 10.2516/OGST/2011103

J.-C. Chauvin, Olivier Grondin, P. Moulin

引用次数: 9

TDC Offset Estimation from Motored Cylinder Pressure Data based on Heat Release Shaping 基于热释放成形的汽缸压力数据的上止点偏移估计

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-07-01 DOI: 10.2516/OGST/2011144

P. Tunestål

{"title":"TDC Offset Estimation from Motored Cylinder Pressure Data based on Heat Release Shaping","authors":"P. Tunestål","doi":"10.2516/OGST/2011144","DOIUrl":"https://doi.org/10.2516/OGST/2011144","url":null,"abstract":"Finding the correct Top Dead Center (TDC) offset for an internal combustion engine is harder than it seems. This study introduces a novel method to find the TDC offset based on the simple assumption that the heat loss power through the combustion chamber walls is constant for motored cycles in a narrow Crank Angle interval around TDC. The proposed method uses nonlinear least squares optimization to find the combination of specific heat ratio and TDC offset that makes the heat loss power as constant as possible. An important subproblem is to determine the peak pressure location with high accuracy. Fitting a third order Fourier series to the motored cylinder pressure allows the pressure maximum to be estimated with a standard deviation of 0.005° Crank Angle (CA) and it can also be used instead of the measured pressure to reduce the uncertainty of the TDC estimate by approximately 50%. The standard deviation of a single-cycle TDC estimate is approximately 0.025° CA when using a crank resolution of 0.2° CA for the measurements. The bias of the TDC estimate is in the 0-0.02° CA range both when comparing to measurements with a TDC sensor and with simulated motored cycles. The method can be used both for calibration and on-board diagnostics purposes e.g. during cranking, fuel cut-off or engine switch-off. The third order Fourier series fit comes with a significant computational penalty but since it is only applied very intermittently this does not have to be a serious issue.","PeriodicalId":19444,"journal":{"name":"Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole","volume":"65 1","pages":"705-716"},"PeriodicalIF":0.0,"publicationDate":"2011-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82331409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Risk Analysis of Flare Flame-out Condition in a Gas Process Facility Analyse des risques des conditions d’extinction de torche au sein d’une installation de traitement de gaz 气体处理装置中火炬熄灭条件的风险分析气体处理装置中火炬熄灭条件的风险分析

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-05-01 DOI: 10.2516/OGST/2010027

O. Zadakbar, R. Abbassi, F. Khan, K. Karimpour, M. Golshani, A. Vatani

引用次数: 8

Chemical Looping Pilot Plant Results Using a Nickel-Based Oxygen Carrier 镍基氧载体化学环化中试装置结果

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-03-01 DOI: 10.2516/OGST/2010036

T. Pröll, Philipp Kolbitsch, Johannes Bolhar-Nordenkampf, H. Hofbauer

{"title":"Chemical Looping Pilot Plant Results Using a Nickel-Based Oxygen Carrier","authors":"T. Pröll, Philipp Kolbitsch, Johannes Bolhar-Nordenkampf, H. Hofbauer","doi":"10.2516/OGST/2010036","DOIUrl":"https://doi.org/10.2516/OGST/2010036","url":null,"abstract":"A chemical looping pilot plant was designed, built and operated with a design fuel power of 120 kW (lower heating value, natural gas). The system consists of two Circulating Fluidized Bed (CFB) reactors. Operating results are presented and evaluated for a highly reactive nickel-based oxygen carrier, total system inventory 65 kg. The performance in fuel conversion achieved is in the range of 99.8% (CH4 conversion) and 92% (CO2 yield). In chemical looping reforming operation, it can be reported that thermodynamic equilibrium is reached in the fuel reactor and that all oxygen is absorbed in the air reactor as soon as the global stoichiometric air/fuel ratio is below 1 and the air reactor temperature is 900°C or more. Even though pure natural gas (98.6 vol.% CH4 ) without steam addition was fed to the fuel reactor, no carbon formation has been found as long as the global stoichiometric air/fuel ratio was larger than 0.4. Based on the experimental findings and on the general state of the art, it is concluded that niche applications such as industrial steam generation from natural gas or CO2 -ready coupled production of H2 and N2 can be interesting pathways for immediate scale-up of the technology.","PeriodicalId":19444,"journal":{"name":"Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole","volume":"51 1","pages":"173-180"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80487973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Chemical Looping with Copper Oxide as Carrier and Coal as Fuel 以氧化铜为载体，煤为燃料的化学环

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-03-01 DOI: 10.2516/OGST/2010028

E. Eyring, G. Kónya, J. Lighty, Asad H. Sahir, A. Sarofim, K. Whitty

{"title":"Chemical Looping with Copper Oxide as Carrier and Coal as Fuel","authors":"E. Eyring, G. Kónya, J. Lighty, Asad H. Sahir, A. Sarofim, K. Whitty","doi":"10.2516/OGST/2010028","DOIUrl":"https://doi.org/10.2516/OGST/2010028","url":null,"abstract":"A preliminary analysis has been conducted of the performance of a Chemical Looping system with Oxygen Uncoupling (CLOU) with copper oxide as the oxygen carrier and coal approximated by carbon as the fuel. The advantages of oxygen uncoupling are demonstrated by providing the energy balances, the circulation rate of oxygen carrier, the oxygen carrier mass loadings, the carbon burnout and oxygen partial pressure in the fuel reactor. Experimental data on the cycling of cuprous oxide to cupric oxide and kinetics for the oxidation and decomposition reactions of the oxides were obtained for use in the analysis. For this preliminary study unsupported oxides were utilized. The decomposition temperatures were rapid at the high temperature of 950°C selected for the fuel reactor. The oxidation kinetics peaked at about 800°C with the decrease in rate at higher temperatures, a decrease which is attributed in the literature to the temperature dependence of the diffusional resistance of the CuO layer surrounding the Cu2 O; the diffusion occurs through grain boundaries in the CuO layers and the rate of diffusion decreases as a consequence of growth of CuO grains with increasing temperature. The analysis shows the advantages of CLOU in providing rapid combustion of the carbon with carbon burnout times lower than the decomposition times of the oxygen carrier. For the full potential of CLOU to be established additional data are needed on the kinetics of supported oxides at the high temperatures (>850°C) at which oxygen is released by the CuO in the fuel reactor.","PeriodicalId":19444,"journal":{"name":"Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole","volume":"2 1","pages":"209-221"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86994746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 100

Oxidation and Reduction of Iron-Titanium Oxides in Chemical Looping Combustion: A Phase-Chemical Description 铁钛氧化物在化学环燃烧中的氧化和还原:相化学描述

Oil & Gas Science and Technology-revue De L Institut Francais Du Petrole Pub Date : 2011-03-01 DOI: 10.2516/OGST/2011008

P. D. Hoed, A. Luckos

引用次数: 30