基于移动平均窗口法的自动变速箱空挡滑行控制策略优化

甄雷^1，2，张成伟^1，2，温鹏博^1，2，邵宏鑫^1，2，欧阳虎威^1，2，王德成^1，2

1.潍柴动力股份有限公司，山东 潍坊  261061；2.内燃机与动力系统全国重点实验室，山东 潍坊  261061

摘要：为提高商用车自动变速箱空挡滑行时的最优燃料经济性，分析自动变速箱空挡滑行控制过程燃料喷射质量及经济性影响因素，采用基于时间的移动平均窗口法优化空挡滑行控制策略并结合道路试验路谱分析结果进行验证。结果表明：车辆进入、离开怠速工况时燃料消耗质量固定，空挡滑行过程中总燃料消耗质量与进入、退出空挡滑行控制的次数和单次滑行时间有关；减小进入、退出空挡滑行控制的次数，减少时间较短的空挡滑行，保留时间较长的空挡滑行，可提高车辆燃料经济性；对于道路试验，采用优化后的空挡滑行控制策略，百公里燃料消耗质量由31.950 kg降低为31.728 kg，节省0.222 kg。

关键词：自动变速箱；空挡滑行；经济性；控制策略

Optimization of control strategy for automatic transmission neutral coasting using moving average window method

ZHEN Lei^1,2, ZHANG Chengwei^1,2, WEN Pengbo^1,2, SHAO Hongxin^1,2, OUYANG Huwei^1,2, WANG Decheng^1,2

1. Weichai Power Co., Ltd., Weifang 261061, China;

2. State Key Laboratory of Engine and Powertrain System, Weifang 261061, China

Abstract: In order to improve the fuel economy of commercial vehicle automatic transmissions during neutral coasting, the fuel injection quality and economic influencing factors of the automatic transmission neutral slip control process are analyzed. The neutral slip control strategy is optimized based on the time-based moving average window method and verified by combining road test spectrum analysis. The results show that the fuel consumption mass is fixed when the vehicle enters and leaves the idle condition, and the total fuel consumption mass during neutral coasting is related to the number of times when it enters and exits neutral coasting control and the duration of a single coasting. Reducing the frequency of entering and exiting neutral coasting control, minimizing short duration neutral coasting, and retaining longer duration neutral coasting can improve vehicle fuel economy. For the road test, the optimized neutral sliding control strategy is adopted to reduce the gas consumption per 100 km from 31.950 kg to 31.728 kg, saving 0.222 kg in gas consumption per 100 km.

Keywords: automatic transmission; neutral coasting; economy; control strategy