Engine control system consists of the appearance characteristic of the diesel engine shows that the diesel engine is approximately constant torque adjustment, the output power of the speed of change in the performance of small hydraulic excavators, but does not substantially change the output torque. Throttle opening increases (or decreases), the diesel engine output power increase (or decrease) the amount of money small excavators, since the output torque is essentially the same, so the engine speed increases (or decreases), that is, different throttle opening degree corresponding to different engine speed. Thus, the purpose of the diesel engine control is through control of the throttle opening is adjusted to achieve the engine speed. Currently used in the hydraulic excavator diesel engine electronic control unit power optimization systems, automatic idling devices, electronic speed control, electronic throttle control system.泰安嘉 and Heavy Machinery Co., bucket capacity 0.3 ~ 0.4m3 small wheeled excavators mini excavators domestic prices, the structure is simple, inexpensive mini excavators, hydraulic system is relatively simple: about 20MPa pressure gear pump the hydraulic oil through the pipeline to the multi-valve, control valve for each cylinder actuator moves along the loop system hydraulic oil back into the tank. Cool-down of the hydraulic system, thanks to a back road into an area of ??250mm × 250mm air-cooled radiator is completed. Summer use when the aircraft will often appear weak or no action motion phenomenon. The reason is that the hydraulic oil temperature is too high. Consider the whole cost-effective and practical effect, according to the author many years of experience in the vicinity of the oil port of the gear pump to install a 600mm × 450mm × 250mm tank, and built a number of serpentine tube connected to inlet line; box above the solder 10 a diameter of 25mm seamless pipe, water cooling water tank to reduce oil purposes. After testing, the effect is good, better solution to the problem of the excavator does not work under the hot weather. Mini backhoe loader models, Jin sized excavators, Kerry and Heavy Industries and Heavy Machinery Co., Ltd. by the 泰安嘉.泰安嘉 and Heavy Machinery Co., Ltd. (www.tajhzg.com/) strong, credible, in Tai'an, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Kerry and heavy and you hand in hand into the brilliant, for a better future!