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In this study, The pressure drop in the intake system when the new air filter is -1mbar, then -21mbar, −40 mbar depending on the pollution, and −65 mbar in a fully clogged state, were investigated. While the pressure drop in the intake system was -1mbar, the maximum power produced in the engine was initially 64.2 kW, and the maximum torque was 386 Nm. When the pressure drop reached −65 mbar, the engine’s maximum power dropped to 58.1 kW and its maximum torque to 360 Nm. When the engine is at maximum torque (1400 rpm), the pressure drop in the system is −1 mbar, while the fuel consumption is 16.4 L/h, and when the pressure drop reaches −65 mbar, the fuel consumption increases to 34.3 L/h. Similarly, at maximum engine power (2200 rpm), the pressure drop in the system is −1 mbar, while fuel consumption is 14.8 L/h. When the pressure drop reaches −65 mbar, fuel consumption increases to 31.2 L/h. At the same time, it has been observed that while all the performance values of the engine have decreased depending on the air filter pollution level, harmful exhaust emissions CO, NO, and NO x  increased significantly.

Effects of clogged air filter on power, torque, fuel consumption and emissions of diesel engines in tractors