Browse Publications Technical Papers 2002-01-1254

Shift Control System Development (NAVI·AI-SHIFT) for 5 Speed Automatic Transmissions Using Information From the Vehicle's Navigation System 2002-01-1254

A 5-speed automatic transmission (5AT) control system called the NAVI·AI-SHIFT, which effects the shift control of a 5AT by using the road data obtained by a navigation system, has been developed and installed on the new Mark-II model. This system acquires data such as the distance from the vehicle to the curve located ahead, the contour of the curve from the navigation system. Then, the system determines the optimum gear selection based on the above mentioned information, the gradient data, the present vehicle speed and the driver's maneuvers. This paper describes the construction, features, and the effectiveness of the new shift control system that has been developed for automatic transmissions (AT).


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.