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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică „Gheorghe Asachi“ din Iaşi, Tomul LVIII (LXII), Fasc. 4, 2012 Secţia CONSTRUCŢII DE MAŞINI OPTIMIZATION OF THE AIR FLOW CONTROL FOR A CAR ENGINE COOLING SYSTEM BY MARIUS RECEANU ∗1 , DAN DĂSCĂLESCU 2 and ADRIAN SACHELARIE 2 1 MITECO S.A. 2 “Gheorghe Asachi” Technical University of Iaşi, Romania, Department of Automotive and Mechanical Engineering Received: 30 March 2012 Accepted for publication: 14 April 2012 Abstract. The servomechanism for air flow control has as effect on cooling starting: fuel consumption and wear reduction. The shorting of the warming up engine period has been ascertained. As consequence the wear and the pollution reduce in time of cold starting. A relevant data in the prosess is the surrounding temperature. The variation of cooling air flow produces modifications in the dynamic behaviour of care-engine cooling system, especially when the engine and coolant liquid are cold by the time of approach to steady states. Key words: car engine cooling system, cooling air flow, car engine system, automatic control and servomechanisms. 1. Introduction When fuel is burnt in an internal combustion engine roughly 30% energy in the fuel is available as us full work. The rest is rejected as heat in a accordance with the second law of thermodynamics. Roughly 30% of the energy is rejected in the exhaust flow, roughly 30% of fuel energy is rejected into the engine coolant and the rest is radiated off the engine structure into the atmosphere. The heat lost to circulating cooling is: Qr = qr cl ( T ri − T re) , (1) ∗ Corresponding author: e-mail: mariusrec@yahoo.com
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BULETINUL INSTITUTULUI POLITEHNIC D
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VICTOR COTOROS şi EMIL BUDESCU, As
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262 Iona Ţenu et al. REFERENCES C
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