Design of Series Hybrid Drive Train for Off-Road Vehicles

Off-road vehicles (military, agricultural, and construction) usually operate on unprepared ground and need to overcome very complex and difficult ground obstacles, such as steep grade and very soft ground. Depending on the functional requirements, different criteria are used to evaluate the performance of various types of off-road vehicles. For tractors, their main function is to provide adequate draft to pull various types of implement and machinery: drawbar performance is of primary interest. This may be characterized by the ratio of drawbar pull to vehicle weight, drawbar power, and drawbar efficiency. For off-road transport vehicles, the transport productivity and efficiency are often used as basic criteria for evaluating their performance. For military vehicles, the maximum feasible operating speed at two specific points in a given area may be employed as a criterion for evaluation of their agility. 1