en ساخت Manufacturing مروری Review Adjustable throat-area expansion valves (ATAEV) are functioned as area regulator control units. In literatures, there are many expansion valves normally used in automotive air-conditioning systems, as regulator and electrical type valves. Nevertheless, a review study for such issue has not been introduced, according to the best of author knowledge. The present paper presents a review study for expansion valves used in air conditioning of automobiles. Different types of expansion valves are discussed including the working principles and the limitation of their working conditions.<br> <br> &nbsp; Automobiles, Air conditioning, Review, Electronic expansion valve. 2868 2875 http://ase.iust.ac.ir/browse.php?a_code=A-10-214-2&slc_lang=en&sid=1 Ashraf Elfasakhany ashr12000@yahoo.com 180031947532846002078 180031947532846002078 Yes Taif University