International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) | IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 7 | Iss. 11 | November 2017 | 22 Turbo-Matching Of A58N75 Turbocharger For TATA 497 TCIC -BS III Engine – An Experimental Investigation Badal Dev Roy*, Dr.R.Saravanan** *(Research Scholar, Department of Mechanical Engineering, School of Engineering, Vels Institute of Science, Technology &Advanced Studies (VISTAS), Vels University, Chennai, TN, India. ** (Research Supervisor, Professor (Mechanical) & Principal, Ellenki Institute of Engineering and Technology, Jawaharlal Nehru Technological University, Hyderabad, TS, India. Corresponding Author : Badal Dev Roy I. INTRODUCTION Turbo charger is an accessory in the IC engines to boost pressure, especially at higher loads. Turbo charger also helps to reduce specific fuel consumption (SFC), downsizing the engine, reduce CO 2 emission, etc.[1]-[5]. Due to the character of centrifugal compressor, the turbocharged engine yields lesser torque than naturally aspirated engine at lower speeds [6],[7]. Comparatively in diesel engine these problems very worse than petrol engine. Some of the system designs were made to manage this problem. They are: adopting the sequential system [8], incorporate the limiting fuel system, reducing the inertia, improvements in bearing, modification on aerodynamics [9], establishing electrically supported turbocharger [10], the use of positive displacement charger i.e., secondary charging system and use of either electric compressor or positive displacement charger with turbocharger [10],[11] facilitating the geometrical variation on the compressor and turbine [12], adopting the twin turbo system [13], and dual stage system [14]. It is noticed that the transient condition is always worst with the engine which adopted single stage turbo charger. The variable geometry turbine was introduced for reducing the turbo lag in petrol as well as diesel engines. But that system is not accurate match for petrol engines [15]. Even though many researches were done on this case still the problem is exist. [12],[15]-[18]. Though the advancements in system design like variable geometry turbine, common rail injection system, and multiple injections, the problem is still persist due to the limiting parameter say supply of air. [19] discussed in detail about the benefits, limitations of turbo charger in single stage, parallel and series arrangements. According to the literature the turbocharger matching is a monotonous job and demands enormous skill. The turbo matching can be defined as a task of selection of turbine and compressor for the specific brand of engine to meet its boosting requirements. That is, their combination to be optimized at full load. The trial and error method cannot be adopted in this case because the matching is directly affecting the engine performance [5],[20],[21]. So it is a difficult task and to be worked out preciously. If one chooses the trial and error or non precious method, it will certainly lead to lower power output at low speeds for partly loaded engines for the case of two stage turbo charger. It is because of the availability of a very low pressure ratio after every stage than single stage [21]. Some cases the turbocharger characteristics are not readily available, and in some cases, not reliable or influenced by the engine which is to be matched [19]. Nowadays the Simulator is used for matching the turbocharger to the desired engine. The simulator was used to examine the performance at constant speed of 2000 rpm of two stage and single stage turbo chargers, the aim of the study was to optimize the high load limit in the Homogeneous charge compression ignition engine. For increasing the accuracy of matching the ABSTRACT: In automobile, particularly heavy vehicles necessitate charge boosting at higher load by turbocharger. Choice of turbocharger should be made with utmost care. Because, the mismatching leads to either surge and choke at engine air flow. Even though many methods of turbo charging reported in the literature, this research work focuses on test based matching. Primarily the matching of turbocharger to desired engine obtained by the simulation method. The data-logger matching method was used for validating the same. The objective of this research is to find the accuracy of matching of A58N75 Turbo Charger for the TATA 497 TCIC -BS III engine. The compressor map is used for comparing the solutions. The appropriateness was experimentally evaluated at various vehicle routes and discussed. Keywords: Data-logger, Simulation, Turbo-charger, Trim size, Turbo matching, Compressor mapping,