Fig. 6: Distribution of regenerative braking events by starting speed and speed reduction with average efficiency by region.
From: Insights into adaptive cruise control and energy efficiency in electric vehicles
This figure compares regenerative braking events in electric vehicles under the two driving modes. The horizontal axis represents the starting speed of a braking event in kilometers per hour (kph), while the vertical axis shows the magnitude of the speed reduction during the event. Colored contours indicate the density of braking events for each mode: ACC OFF events are concentrated at lower starting speeds and larger speed reductions, while ACC ON events cluster at higher starting speeds and smaller reductions. The background color map shows the mean regenerative braking efficiency (%) for each region of the speed-deceleration space, with warmer colors indicating higher energy recovery.
