Energy efficency improvement of timing chain drives

正时链传动装置的能源效率改进

• 批准号: 200508510
• 负责人: Professor Dr.-Ing. Bernd Sauer
• 金额: --
• 依托单位: Lehrstuhl für Maschinenelemente und Getriebetechnik (MEGT)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/200508510?language=en
• 关键词: Energy; efficency; improvement; timing; chain

Timing assemblies of internal combustion engines are more often designed as chain drive. Compared to tooth belt drives, timing chain drives have many advantages, such as the lower need of space and lower costs for maintenance and acquisition. The only disadvantage of timing chain drives is the lower energy efficiency. The chain of a timing chain drive hast to be almost completely guided and tensioned to ensure operational safety. The transfer of tensioning force is accomplished via a hydraulic tensioning system, which transmits the force via sliding contacts on the chain. The lower energy efficiency is due to the chain-rail contacts. In the first period (DFG SA 898/10-1) approaches were investigated, with which a power loss reduction of timing chain drives is possible. Approaches as the need-based adjustment of chain tensioning force at each operating point, the optimization of the lubricant supply and the optimization of the rail surface were investigated. In doing so, some positive approaches were found. The tests were conducted at steady-state operating points on a test stand, including the oscillations of the valve train. In the next step, the oscillations of the crankshaft and pistons, and the rotation irregularities caused by the gas forces will be taken into account. In addition, transient operating conditions are considered. Furthermore, the positive approaches of targeted lubrication will be further developed and investigations on textured link plates will be conducted.

内燃机的定时组件更经常被设计为链驱动器。与牙齿腰带驱动器相比，定时链驱动器具有许多优势，例如较低的空间需求和较低的维护和获取成本。定时链驱动器的唯一缺点是能源效率较低。正时链驱动器的链条几乎被完全指导和张紧，以确保操作安全。张力的转移是通过液压张紧系统实现的，该系统通过链条上的滑动触点传输力。较低的能源效率是由于链条轨道触点引起的。在第一阶段（DFG SA 898/10-1）中，研究了计时链驱动器的功率损失。随着每个工作点的链张力的基于需求的调整，润滑剂供应的优化和轨道表面的优化。这样，发现了一些积极的方法。测试是在测试架上的稳态操作点进行的，包括阀列的振荡。在下一步中，将考虑曲轴和活塞的振荡，以及由气体力引起的旋转不规则。另外，考虑了瞬态操作条件。此外，将进一步开发靶向润滑的肯定方法，并将对纹理链路板进行调查。