换挡规律是指两排挡间自动换挡时刻随控制参数变化的规律，其好坏直接影响车辆的燃油经济性、动力性和排放性。换挡规律的发展，大致经历了传统型、基于经验型和智能型。按照控制参数的多少，换挡规律大致可分为单参数、两参数和三参数换挡规律。本文以目前工程中大量实际应用的二参数换挡规律为基础，应用AVL Cruise软件针对装备双离合器变速器（DCT）的某商用轿车进行整车仿真，在此基础上使用Cruise GSP功能模块对其换挡规律进行仿真计算，并综合考虑道路坡度、行驶环境、车辆经济性和排放对具体工况下的传动系状态进行优化。结果表明，该方法能够快速准确地生成换挡规律、方便地根据路况进行传动系状态优化，进而优化换挡，对于实际工程中加快整车开发、快捷地进行变速器标定具有一定借鉴意义。
Shift schedule is the automatic shift based on the control parameters changes in the automatic transmission. It will affect the vehicle fuel economy, acceleration, and emission. It has approximately passed through three development phases so far: traditional type, experience-based type, and intelligent type. And according to the numbers of the control parameters, it can be roughly divided into three main categories: single parameter, two parameters, and three parameters schedule. On the basis of the available studies, a simulation model of a commercial sedan equipped with Dual Clutch Transmission(DCT) is developed via the AVL Cruise software, and two
parameters shift schedule which is widely used in the real auto engineering is taken account of. On this basis, the shift schedule is simulated and generated using the Gear Shift Program(GSP) module of the AVL Cruise software. Furthermore, the transmission states is
optimized with the considerations involving vehicle fuel economy, emission, road slope, and driving environment under the given cycle condition. The result shows that this method could generate the shift schedule accurately and quickly and optimize the transmission states on the specific cycle conveniently. These works could be used in the effective calibration of automatic transmission and shorten the vehicle development cycle.
