Akademik Veri Yönetim Sistemi
Middle East 11th International Conference on Contemporary Scientific Studies, Adana, Türkiye, 13 - 14 Ocak 2026, ss.250-260, (Tam Metin Bildiri)
The implementation of Euro V emission standards in agricultural mechanization, driven by increasingly stringent environmental regulations, has led to significantly higher thermal loads in tractor engines. Under these demanding conditions, optimization of the cooling system becomes a critical engineering requirement in order to extend component life, maintain effective lubrication, and prevent performance degradation. In this study, the cooling performance of a modern wheeled tractor was analyzed in detail using the Air to Boil (ATB) parameter, which represents the boiling margin of the cooling system. Due to the inherently low operating speeds of tractors, a test procedure in which natural air flow (ram air) was neglected was established based on the SAE J819 standard. To simulate the most thermally severe operating conditions, measurements were conducted at maximum torque speed, under full engine load, and with the air-conditioning system activated, introducing additional airflow resistance. The thermal effects of design modifications, including a 20 mm increase in radiator core width and a 40 mm increase in fan diameter, were investigated. Experimental results indicated that the increased fan diameter enhanced airflow rate, resulting in a notable 4°C improvement in the ATB value, while the operation of the air-conditioning system reduced cooling performance by approximately 2°C. Furthermore, non-uniform temperature distribution across the intercooler was observed, and it was determined that geometric improvements do not always lead to linear performance gains. As a result of the implemented design revisions, a total ATB improvement of 15% was achieved, raising the system above the target safe operating threshold of 49°C and validating its suitability for operation under severe climatic conditions.