ساخت قفل دیفرانسیل نیمه اتوماتیک برای تراکتور مسی فرگوسن 285

Differential lock is a means of improving tractor performance. This system causes the revolution of the axles to become equal. It, improves traction, decreases abrasion of drive tires, improves fuel consumption, and increases tractor work rate. Despite advantages of the system, differential lock has not been optimized in Iran. Thus, a semi-automatic differential lock system for MF-285 tractor was designed and developed. First of all, the different parts of the system were designed, selected, assembled. Under critical conditions, the designed system should disengage the differential lock. Critical conditions for engaging this system are: using of independent brake pedals, high forward speed, and turning the steering wheel. For sensing and measuring the critical conditions, proper sensors were selected. Output signals of these sensors were sent to a micro controller to decide the continuous engaging or disengaging. Finally, a MF-285 tractor was equipped with the designed system. The tractor performance in primary tillage was evaluated using a mounted moldboard plow with a width of 110 cm and a working depth of 25 cm. These tests showed that unbalanced weight distribution on wheels and unequal traction capacity under drive wheels cause the slip of one wheel to be 6 percent higher thananother. This system improves the unequal slip problem and decreases fuel consumption by 0.5 L/ha.