This paper describes a newly developed adaptive cruise control (ACC) system using continuously variable transmission (CVT) gear ratio control. This system provides excellent headway distance control performance at a reasonable cost. With this system, headway distance is measured with a laser radar, and the throttle position and CVT gear ratio are controlled under both acceleration and deceleration situations.The new ACC system consists of a target headway distance calculator, a headway distance controller, a vehicle velocity controller and a drive torque controller. Using a drive torque control method that was newly developed based on integrated control of engine torque and the CVT gear ratio, the following benefits are obtained. As a result, sufficient ACC performance can be attained even in 2.0-liter class vehicles. This paper describes the system features, design concept and benefits of the system, which are illustrated with simulation and experimental results.
Adaptive Cruise Control System Using CVT Gear Ratio Control
Sae Technical Papers
Automotive and Transportation Technology Congress and Exposition ; 2001
2001-10-01
Conference paper
English
Adaptive cruise control system using CVT gear ratio control
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