装载机典型工作循环多功率匹配研究
发布时间：2019-05-28 07:33
【摘要】：降低能耗是装载机发展的必然趋势之一，各生产厂家在装载机发展的不同阶段都作了大量的研究工作降低能耗、提高工作效率。在使用机械调速发动机阶段，主要通过优化变矩器与发动机配置、提高变矩器高效区的宽度、降低发动机转速等一系列方法降低装载机在使用过程中的能源消耗，随着电控发动机在装载机上应用越来越广泛，基于电控发动机可以提供多条独立的外特性曲线的特性，为装载机工程技术人员提供一种全新的降低能耗的方式，即在重载工况下选择大功率，在轻载工况下选择小功率，从而有效地降低能耗。目前国外的装载机已经应用了该技术，在驾驶室内设有功率选择开关，驾驶员可以根据不同工况选择不同的功率进行作业。 本课题重点研究在装载机典型工作循环中不同阶段对发动机功率的需求，从整机性能的角度评价综合评价全功率部分油门和部分功率全油门两种不同工作模式，并给出合理的部分功率全油工作模式时的发动机功率和具体应用时的解决方法。通过理论计算，确定典型工作循环不同阶段需求的发动机功率；使用通用数学工具建立变矩器与发动机共同工作时的数学模型；重点研究了全功率部分油门和部分功率全油门时，变矩器与发动机匹配的状况；以某品牌5吨装载机的相关数据为基础，从整机性能的角度评价了全功率部分油门和部分油门全功率对加速时间、加速距离和燃油经济性的影响；随着电控发动机在装载机领域应用的越来越广泛，多功率匹配会越来越受到 重视，，本课题的研究具有一定的现实意义。
[Abstract]:Reducing energy consumption is one of the inevitable trends in the development of loaders. Various manufacturers have done a lot of research work to reduce energy consumption and improve work efficiency in different stages of loader development. In the stage of using mechanical speed regulating engine, a series of methods, such as optimizing torque converter and engine configuration, improving the width of high efficiency area of torque converter and reducing engine speed, are used to reduce the energy consumption of loader. With the application of electronic control engine in loader more and more widely, based on the characteristic that electronic control engine can provide multiple independent external characteristic curves, it provides a new way to reduce energy consumption for loader engineers and technicians. That is, select high power under heavy load condition and low power under light load condition, so as to effectively reduce energy consumption. At present, this technology has been applied in foreign loaders. there are power selection switches in the cab, and the driver can choose different power according to different working conditions. In this paper, the demand for engine power in different stages of typical working cycle of loader is studied, and two different working modes of full power partial throttle and partial power full throttle are evaluated from the point of view of the performance of the whole machine. The engine power in the reasonable partial power full oil mode and the solution in application are given. Through theoretical calculation, the engine power required at different stages of the typical working cycle is determined, and the mathematical model of torque converter and engine working together is established by using general mathematical tools. The matching between torque converter and engine is studied when the full power partial throttle and partial power full throttle are used. Based on the relevant data of a brand 5 ton loader, the effects of full power partial throttle and partial throttle full power on acceleration time, acceleration distance and fuel economy are evaluated from the point of view of the performance of the whole machine. With the more and more extensive application of electronic control engine in the field of loaders, multi-power matching will be paid more and more attention, and the research of this subject has certain practical significance.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH243
本文编号：2486860
[Abstract]:Reducing energy consumption is one of the inevitable trends in the development of loaders. Various manufacturers have done a lot of research work to reduce energy consumption and improve work efficiency in different stages of loader development. In the stage of using mechanical speed regulating engine, a series of methods, such as optimizing torque converter and engine configuration, improving the width of high efficiency area of torque converter and reducing engine speed, are used to reduce the energy consumption of loader. With the application of electronic control engine in loader more and more widely, based on the characteristic that electronic control engine can provide multiple independent external characteristic curves, it provides a new way to reduce energy consumption for loader engineers and technicians. That is, select high power under heavy load condition and low power under light load condition, so as to effectively reduce energy consumption. At present, this technology has been applied in foreign loaders. there are power selection switches in the cab, and the driver can choose different power according to different working conditions. In this paper, the demand for engine power in different stages of typical working cycle of loader is studied, and two different working modes of full power partial throttle and partial power full throttle are evaluated from the point of view of the performance of the whole machine. The engine power in the reasonable partial power full oil mode and the solution in application are given. Through theoretical calculation, the engine power required at different stages of the typical working cycle is determined, and the mathematical model of torque converter and engine working together is established by using general mathematical tools. The matching between torque converter and engine is studied when the full power partial throttle and partial power full throttle are used. Based on the relevant data of a brand 5 ton loader, the effects of full power partial throttle and partial throttle full power on acceleration time, acceleration distance and fuel economy are evaluated from the point of view of the performance of the whole machine. With the more and more extensive application of electronic control engine in the field of loaders, multi-power matching will be paid more and more attention, and the research of this subject has certain practical significance.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH243
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