METHOD AND SYSTEM OF CONTROLLING AUTOMATIC DOWN-SHIFT OF MECHANICAL AUTOMATIC GEAR SHIFT SYSTEM OF VEHICLE

摘要

PROBLEM TO BE SOLVED: To release anti-hunting off set after up-shift by detecting a running state at an up-grade. SOLUTION: This method and system are a down-shift control method and system for a mechanical automatic gear shift system 10 utilized for a vehicle. An anti-hunting logic after upshift at least partially decrease anti-hunting offset for a down-shift profile in a shift direction right before by detecting a high throttle demand (THL>85%) and the state of low acceleration (d/di<(OS)