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.

内燃机的正时组件通常被设计为链传动。与齿形带传动相比，正时链传动具有许多优点，例如所需空间较小以及维护和采购成本较低。正时链传动的唯一缺点是能源效率较低。正时链传动装置的链条必须几乎完全被引导和张紧，以确保操作安全。张紧力的传递是通过液压张紧系统完成的，该系统通过链条上的滑动接触件传递力。较低的能源效率是由于链轨接触造成的。在第一阶段（DFG SA 898/10-1）中，研究了可以减少正时链驱动器功率损耗的方法。研究了根据需要调整每个工作点链条张紧力、优化润滑剂供应和优化轨道表面等方法。在此过程中，发现了一些积极的做法。测试是在试验台上的稳态工作点进行的，包括气门机构的振荡。在下一步中，将考虑曲轴和活塞的振荡以及气体力引起的旋转不规则性。此外，还考虑了瞬态工作条件。此外，将进一步开发定向润滑的积极方法，并对纹理链板进行研究。