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振动压路机匀速压实时间占其作业时间的80%左右,而匀速压实时的功率需求仅占发动机额定功率的60%左右,此时发动机处于高转速低负荷状态工作,耗油率较高,导致振动压路机的作业经济性较差。提出振动压路机的发动机变油门控制方法,即降低匀速压实时的发动机转速,同时适量增大行走泵和振动泵的排量来保证压路机行驶速度及振动频率的稳定性,在不影响压实质量的前提下,使发动机处于经济油耗区工作,提高了振动压路机的作业经济性。分析发动机变油门控制的原理及控制参数之间的关系,给出了其控制流程图,为发动机变油门控制在振动压路机上的应用奠定了基础。
Vibratory roller compaction time accounted for about 80% of its operating time, while the uniform compaction of the power requirements accounted for only about 60% of the rated power of the engine, when the engine at high speed and low load conditions, higher fuel consumption, resulting in Vibratory roller operating economy is poor. The control method of variable throttle for engine of vibratory roller is proposed, which is to reduce the engine speed at constant speed compaction and increase the displacement of traveling pump and vibrating pump at the same time to ensure the running speed and vibration frequency stability of roller. Without affecting the compaction quality Under the premise, make the engine work in the economic fuel consumption area, improve the operating efficiency of vibratory roller. Analysis of the relationship between engine variable throttle control principle and control parameters, and its control flow chart is given, which lays the foundation for the application of engine variable throttle control on vibratory roller.