Superior driver handling performance using a "G-vectoring" braking assistance system

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Superior driver handling performance using a "G-vectoring" braking assistance system

Takahashi, Junya / Borg, Jonathan / Yamakado, Makoto / Zlocki, Adrian

This paper describes the development of the braking assistance system based on a "G-Vectoring" concept. The present work focuses in particular on "Preview G-Vectoring Control" (PGVC), which is based on the "G-Vectoring Control" (GVC) scheme. In GVC, the longitudinal-acceleration algorithm is based on the actual lateral jerk. It was confirmed by driving tests that the vehicle deceleration can significantly improve the handling of the vehicle during entry into a corner. PGVC decelerates a vehicle before it enters a curve, and is based on a new longitudinal-acceleration algorithm which uses predicted and actual lateral jerk. Using the predicted lateral jerk makes it possible to decelerate the vehicle prior to curve entry. This deceleration can emulate a driver's deceleration as the vehicle approaches a curve entry. PGVC is based on such deceleration algorithms and enables automatic deceleration similar to the action of a driver. It is thus possible to significantly improve the driver feeling when this system is activated. Driving tests with this new control system confirmed that the automatic brake control quality improved considerably compared to manual driver control considering both lap time and ride quality. These results indicate that PGVC can be a useful braking assistance system not only to improve the driver's handling performance but also to reduce the brake-task during driving on winding roads.