Stepless speed change tractor control system and control method thereof
A technology of continuously variable speed and continuously variable transmission, which is applied in mechanical equipment, combustion engines, internal combustion piston engines, etc.
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[0041] Specific embodiment: the present invention takes a certain type of Dongfanghong 400-horsepower wheeled tractor equipped with a hydraulic-mechanical continuously variable transmission as the object, and the main parameters of the system are: tractor vehicle mass m=7760kg, tractor main transmission ratio =36.348, transmission ratio The range is 0~2.24, the tractor driving wheel radius r d =0.9046m, engine rated power N e0 =228kw, the maximum output power of the engine =294kW, engine rated speed =2100(r / min), the maximum engine speed =2300(r / min), maximum engine torque =1200N·m, maximum traction force =80kN.
[0042] Such as figure 1 As shown, a continuously variable tractor tractor productivity-economic comprehensive optimum transmission ratio optimization calculation method, the steps are as follows:
[0043] (1) Set the limit speed and torque of the engine and the range of the HMCVT transmission ratio. The speed of the wheeled tractor in the field is main...
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