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Adrian CLENCI

University of Pitesti, Pitesti, Romania

Institution web page: http://www.upit.ro
Personal web page: adi.clenci@upit.ro
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Born: 1973

Interests: Internal Combustion Engine, Automotive

Details:
The significant results obtained are connected with the theoretical and experimental research performed at the University of Pitesti in close cooperation with Conservatoire National des Arts et Métiers de Paris, on the subject of achieving an operational prototype of a so-called adaptive thermal engine, turbocharged, featuring variable compression ratio and variable valve timing capable of running unthrottled. Thus, below there are specified the significant results connected with this subject:
- obtaining, in october 2003, of the doctor in sciences title with the thesis entitled "Researches regarding the improvement of a s.i. engine operation at part loads by variable compression and supercharging";
- obtaining, in France, in mixt team, Romanian-French (Hara, V., Descombes, G., Podevin, P., Clenci, A., Boncea, S.), of a patent entitled "Procédé de régulation d'une levée de soupape, dispositifs de soupape à ouverture variable, moteur équipé d'un tel dispositif" (Brevet Français n°FR2883927);
- claiming in Romania, in mixt team, Romanian-French (Hara, V., Clenci A., Descombes, G., Podevin, P.), of a patent entitled "Thermal Engine with self regulation of compression ratio and valve's lift" (Cerere de brevet n°A/2006);
- performing of some detailed researches, at CNAM Paris in 2001 - 2005, on the subject of the turbocharger perfomances at low speeds, specific to the urban traffic (30000-50000 rpm); it is important to outline that these researches were performed within the 4 research stages (amongst them, 3 are postdoctorate) and that extrapollation for the situation of turbocharging the adaptive thermal engine with variable compression and valve timing was made;
- presentation of the physical prototype (assembled but not yet operational) of the adaptive thermal engine with variable compression and valve timing on the occasion of the national research conference, CNCSIS 7, which took place in may 2005 in Bucharest;
- performing successfully on 31st of Mars 2006 of the first operational tests of the s.i.engine equipped with electronic injection system and variable valve actuation, capable of running unthrottled;
- performing of the first operational tests in 2007 of a prototype vehicle equipped with a s.i.engine featuring variable valve lift and timing - Logan EcoVITA (Ecologic Vehicle by Intake Throttle-less Actuation);
- 1 international research contract :
"Moteur avec autorégulation de la levée des soupapes d'admission. Mise au point du systeme de contrôle de levée de soupapes", Partners: University of Pitesti - Conservatoire National des Arts et Métiers de Paris, Beneficiary: Agence National de VAlorization de la Recherche (www.oseo.fr) / 2008;
- 1 CEEX contract awarded by competition:
"Experimental vehicle equipped with a s.i. engine featuring throttle-less load control by variable valve lift and timing (ECOVITA)", CEEX ET 149 / 2006 - 2008;
- 2 CNCSIS contracts awarded by competition:
1. "Spark ignition engine featuring throttle-less engine load control by variable intake valve lift",CNCSIS code At 140 / 2005-2006;
2. "Vehicle equipped with a variable compression ratio engine (VCR)",CNCSIS code At 608 / 2003-2004.

Selected publications:
• 1. CLENCI, A., IORGA-SIMAN, V., DELIGANT, M., PODEVIN, P., DESCOMBES, G., NICULESCU, R. . A CFD study on the effects of operating an engine with low intake valve lift at idle corresponding speed. Energy, 71, pp. 202-217, 2014.
• Clenci Adrian, Biziiac Adrian, Podevin Pierre, Descombes Georges, Hara Vasile. Synthesis and analysis of a variable valve lift and timing mechanism. In SIAR (ed.), 2nd AMMA International Congress, Cluj, Romania. 2007.
• Clenci Adrian, Podevin Pierre, Biziiac Adrian, Descombes Georges, Hara Vasile. DEVELOPMENT OF A VARIABLE VALVE LIFT AND TIMING SYSTEM FOR LOW PART LOADS EFFICIENCY IMPROVEMENT. Proceeding of the European Automotive Congress, -, pp. -, 2007.
• CLENCI A., DESCOMBES G., PODEVIN P. , HARA V. . Some aspects concerning the combination of downsizing with turbocharging, variable compression ratio and variable intake valve lift. Proceedings of the Institution of Mechanical Engineers Part D, ISSN 0954-4070, Journal of Automobile Engineering, London, ENGLAND, october 2007, 2007.
• Clenci Adrian, Descombes Georges, Podevin Pierre, Hara Vasile. Some aspects concerning the geometry of a hinged engine with a variable compression ratio. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, ISSN: 0954-4070, 2006.
• PODEVIN P., DESCOMBES G., HARA V., CLENCI A. . Performances of the turbocharger at low speeds. In Proceedings of the EAEC Automotive Congress, Belgrade. 2005.
• CLENCI A., PODEVIN P., DESCOMBES G., HARA V., BIZIIAC A. . Throttle-less operation by variable valve timing and lift (VVTL). In Proceedings of the International CAR Automotive Congress, Pitesti, organized under the great patronage of FISITA. 2005.
• Adrian Clenci, Pierre Podevin. Utilisation rationelle de l’énergie dans les moteurs à combustion interne et environnement. Revue Ingénieurs de l’Automobile, ISSN 0020-1200, Paris, France, No 775 bis, 2005.
• CLENCI A., ISPAS N., HARA V., BOBESCU Gh. . Research regarding efficiency improvement of a spark ignition engine at part-loads through variable compression. In Proceedings of the World FISITA Automotive Congress, Barcelona. 2004.
• PODEVIN P., DESCOMBES G., CLENCI A., TABACU I., ZAHARIA C. . Aspects concerning instant torque evaluation when accelerating a turbocharged engine. In Proceedings of the International CONAT Automotive Congress, Brasov, organized under the great patronage of FISITA. 2004.
• PODEVIN P., DESCOMBES G., CLENCI A., ZAHARIA C. . Researches regarding mechanical efficiency evaluation at turbochargers. In Proceedings of the International CONAT Automotive Congress, Brasov, organized under the great patronage of FISITA. 2004.
• CLENCI A., DESCOMBES G., PODEVIN P., HARA V., BOBESCU G. . Considerations on the downsizing technique at the s.i. engine. In Proceedings of the International CONAT Automotive Congress, Brasov, organized under the great patronage of FISITA. 2004.
• CLENCI A., IVAN Fl., RACOTA R. . Higher Expansion or Higher Compression at S.I.E.. In Proceedings of the International ESFA Automotive Congress, Bucuresti, organized under the great patronage of FISITA. 2003.
• CLENCI A., IVAN Fl., RACOTA R. . Studiu Teoretic asupra Destinderii Prelungite la M.A.S.. In Prima Conferinta Nationala cu participare internationala, AMMA, Cluj. 2002.
• CLENCI A., HARA V. . Analytical Synthesis of Intake Cam in Order to Obtain Miller Cycle Technology. In Proceedings of the International MVM Conference, Krgaujevac, Serbia. 2002.
• HARA V., CLENCI A. . The Adaptive Thermal Engine – The best suitable for turbocharging. In Proceedings of the Global Powertrain Congress, Detroit. 2002.
• CLENCI A., HARA V., DESCOMBES G. . Variableness – A major key in engine development. Proceedings of the World FISITA Automotive Congress, Helsinki, 2002.
• CLENCI A., IVAN Fl., RACOTA R. . The Need for supercharging the Miller cycle Engine. In Prima conferinta internationala, SMAT, Craiova. 2001.
• HARA V., CLENCI A. . The Adaptive Thermal Engine – A self-regulation system with fast response time. In Proceedings of the Global Powertrain Congress, Detroit. 2001.
• CLENCI A., TABACU St., HARA V. . Static and Dynamic Analysis of the Adaptive Thermal Engine Lower Block. In Proceedings of the International CAR Automotive Congress, Pitesti, organized under the great patronage of FISITA. 2000.
• HARA V., CLENCI A. . The Adaptive Thermal Engine – The Next Step In powertrain. In Proceedings of the Global Powertrain Congress, Detroit. 2000.

Theses and dissertations:
• Clenci Adrian. Researches regarding the improvement of a s. i. engine’s operation at part loads by variable compression and supercharging. 2003.

Publications from the ISI database, indexed between 2002-2011, produced in Romania:
• Clenci, A; Descombes, G; Podevin, P; Hara, V, Some aspects concerning the geometry of a hinged engine with a variable compression ratio. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, 220 (D1), pp. 103-110, 2006.
• Podevin, P; Clenci, A; Descombes, G, Influence of the lubricating oil pressure and temperature on the performance at low speeds of a centrifugal compressor for an automotive engine. APPLIED THERMAL ENGINEERING, 31 (2-3), pp. 194-201, 2011.
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