自动变速器油位试验角度计算及试验研究
2020-10-21王玲玉张伟樊嘉坤于士博李云虹
王玲玉 张伟 樊嘉坤 于士博 李云虹



摘 要:自动变速器的油位试验是变速器在试验验证阶段首先开展的项目,油位的高低关系到变速器的基本功能,变速器的传动效率,其试验结果直接影响了后续的性能试验和耐久试验。文章从正向开发的思路,首先推导了变速器液面倾斜角度与车辆加速度和坡度的关系,然后按角度计算结果在台架上进行油位试验,确定合适的加油量。最后通过变速器在整车上进行极限驾驶工况和低温试验,以验证加油量的合理性。
关键字:自动变速器;油位;角度计算;试验
Abstract: The oil level test of the automatic transmission is the first project carried out during the verification phase of the transmission. The oil level is related to the basic function of the transmission and the transmissions efficiency. The test result directly affects the subsequent performance tests and durability tests. From the perspective of forward development, this paper firstly derives the relationship between the tilting angle of the transmission oil level and the vehicles acceleration and the roads slope. Then perform an oil level test on the bench according to the calculation result of the angle to determine the appropriate refueling amount. Finally, the transmission is tested on the vehicle under extreme driving and low temperature conditions to verify the rationality of the amount of fuel.
Keywords: Automatic transmission; Oil level; Angle calculation; Test
引言
近年來,我国汽车工业日益发展成熟,2019年全国乘用车产销2100多万辆,这其中有一半以上的乘用车搭载了自动变速器。随着国内众多主机厂不断加大对自动变速器研发投入,自动变速器的传动效率也在不断提高。影响变速器传动效率的主要因素有齿轮搅油功率损失、齿轮啮合功率损失、轴承功率损失、离合器摩擦损失和油泵功率损失等,其中变速器油位的高低直接影响了齿轮搅油功率损失的多少。所以,在满足变速器内零部件润滑要求和液压系统稳定性对油量要求的同时,要尽可能降低润滑油的加油量,这样不仅可降低成本,还可以减少齿轮搅油功率损失。因此,如何确认自动变速器合理的加油量,是变速器在试验验证阶段首先要确认的参数。
学者对自动变速器油位试验做了大量的研究工作。翁晓明等[1]通过仿真……
