This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Model-based Development of Multi-Purpose Diagnostic Strategies for Gas Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 13, 2009 by Consiglio Nazionale delle Ricerche in Italy
Annotation ability available
Engines using compressed natural gas or liquefied petroleum gas are commonly equipped with control systems which are not yet able to completely monitor the gas supply line status. With a particular regard to safety but paying attention even to driving comfort and finally to polluting emissions reduction, two aspects in particular have been taken into account: the first one is the need to detect as soon as possible (and to react consequently) the presence of a problem occurring inside gas supply line (leakages and blocked-valves etcetera); the second one is the ability to detect an unsafe re-fuel operation, done with inserted ignition key, in order to switch off at least as more auxiliary loads as possible. The danger from such a manoeuvre may be identified in the high probability of an eventual electrostatic discharge and/or in the risk that the vehicle may be accidentally moved during the refilling operation.
Thanks to a model-based approach, these diagnosis may be carried out by recording and analyzing several signals already available on all common production systems and may allow to give some information even about entity and location of the leakages under different environmental and engine conditions. The whole strategy may be based either on “black” or on “white-grey” box algorithms, i.e. it may be performed through a system of experimental equations or by substituting some -or all- of them through physical models. By applying all the described procedures it would be also possible to commutate towards the other fuel (in case of dual-fuel engine equipped vehicles). Several experimental tests have been carried out (some more are planned for the immediate future), first in order to identify model parameters and finally to validate and demonstrate the effectiveness of proposed strategies. Some vehicles going to be produced in the immediate future will be already equipped with some of the described algorithms.
CitationCavanna, F., Sgatti, S., Lambertini, L., Sensi, F. et al., "Model-based Development of Multi-Purpose Diagnostic Strategies for Gas Vehicles," SAE Technical Paper 2009-24-0125, 2009, https://doi.org/10.4271/2009-24-0125.
- Li-Guang L. Baoqing D. Huiping W. Zongcheng X. Zhensuo W.B.J. Development of a Gas-Phase LPG Injection System for a Small SI Engine SAE Technical Paper 2003-01-3260 2003
- Shashikantha, Spark Ignition Producer Gas Engine and Dedicated Compressed Natural Gas Engine-Technology Development and Experimental Performance Optimization SAE Technical Paper 1999-01-3515 , 1999
- Kavathekar K.P. Rairikar S.D. Thipse S.S. Development of a CNG Injection Engine Compliant to Euro-IV Norms and Development Strategy for HCNG Operation SAE Technical Paper 2007-26-029 2007
- Dong S.J. Sung W.S. Seung M.O. Kyo N.C. Development of a Mechanical CNG-Diesel Dual Fuel Supply System SAE Technical Paper 931947 1993
- Sun B. Development of the General Motors 5.7l CNG Bi-Fuel Pickup Trucks SAE Technical Paper 980817 1998
- Sun B. Lutz A.A. Vermiglio E.N. Arold M.A. Wiedmann T.K. The Development of the General Motors 2.2l CNG Bi-Fuel Passenger Cars SAE Technical Paper 982445 1998
- Middleton A. Neumann B. Khatri D.S. Development of Dedicated CNG Engine With Multipoint Gas Injection System SAE Technical Paper 2008-28-0014 2008
- Catania A. E. Misul D. Spessa E. Martorana G. Conversion of a Multivalve Gasoline Engine to Run on CNG SAE Technical Paper 2000-01-0673 2000
- Catania A. E. D'Ambrosio S. Mittica A. Spessa E. Performance analysis and comparison of a multivalve SI engine running on either gasoline or CNG SAE Technical Paper 2000-05-0086 2000
- Mookherjee S.P. Sivakumar P. Jothilingam C. Design of Light Commercial Vehicle With CNG Engine Systems SAE Technical Paper 2005-26-062 2005
- Belchior C.R.P. Barcellos W.M. Said de Barros Pimentel V. Analysis of Vehicles Converted From Gasoline to CNG Using Conversion Devises (Kits) SAE Technical Paper 2001-01-3883 2001
- Rouse, Hunter Elementary Mechanics of Fluids Dover Publications Inc. 0-486-63699-2 1978
- Rohsenow W.M. Hartnett J.P. Ganic E.N. HandBook of Heat transfer Applications McGraw-Hill 1985
- Diggins D. CNG Fuel Cylinder Storage Efficiency and Economy in Fast Fill Operations SAE Technical Paper 981398 1998
- Munson B.R. Young D.F. Okiishi T.H. Fundamentals of fluid mechanics IV Edition 2002 Wiley
- Petsinger R.E. Largest CNG Fueling Station in North America SAE Technical Paper 942408 1994
- Ledbetter G.S. Grimmer J.E. Ketcham E.T. Technological Advancements in Ngv Station Design SAE Technical Paper 952772 1995
- Birch B.J. LPG Refueling Technology SAE Technical Paper 2002-01-2739 2002