2020 Highlander Hybrid
This system seems to have two separate components.Predictive efficient drive*1, 2, 3
*1:Vehicles with hybrid system
*2:This function can only be used in the mainland U.S.A. It cannot be used in other states and territories, including Alaska and Hawaii.
*3:Refer to the “OWNER’S MANUAL”.
The system operates based on the driving situation and traffic information to enhance fuel economy.
The predictive efficient drive function can be turned on/off. (P.117)
Predictive deceleration support
The system automatically stores and registers support points where the driver always decelerates or stops based on pedal operation and the vehicle speed of the driver.
The registered points are shown on the map as icons for use as predictive deceleration support points.
When the position of the vehicle approaches the registered point, the icon changes to an emphasized icon.
Depending on the system or driving situation, the engine brake amount increases after releasing the accelerator pedal.
As a result, the battery charge amount can be increased when decelerating or stopping the vehicle to enhance fuel economy.
■ Predictive deceleration support Example: 7-inch display
Reference operation range
●When the vehicle approaches to predictive deceleration support points registered in the navigation system, the “Reference operation range” of the ECO Accelerator Guidance (P.104) on the multi-information display will be turned off to encourage the driver to reduce excessive acceleration.
●The engine braking force will be increased according to the driving conditions to more efficiently charge the hybrid battery (traction battery) after the accelerator pedal is released.
Predictive SOC control
The system reads the road and traffic conditions ahead to efficiently control the charging and discharging of the hybrid battery according to the actual driving situation.
The capacity of the hybrid battery is limited. When it is fully charged, regeneration cannot occur, and when the battery is depleted, it may be forcibly charged by the engine. The system predicts these situations to adjust the battery charge level in advance, effectively utilizing the battery.
●The system operates when starting route guidance and the position of the vehicle is along the guided route. (The system does not operate in parking lots, etc.)
●When multiple destinations are set, the system will continue to operate to the last destination.
■ Predictive SOC control
The following types of control are performed based on data such as road and traffic information during route guidance by the navigation system to help ensure that the vehicle efficiently uses electricity.
●When there is a long downhill slope along the route, the system reduces the hybrid battery (traction battery) level before reaching the slope to help ensure charging capacity for regenerative braking while traveling downhill.
●When traffic congestion is predicted along the route, the system helps ensure a certain battery level before reaching congested roads to reduce the frequency of starting the engine to charge the hybrid battery (traction battery) due to low battery levels.
The deceleration support stores nav points where the driver always decelerates or stops and shows them on the nav display. It increases engine braking when the accelerator is released to increase battery charge to be used for acceleration. So, it's trying to predict whether you are lifting your foot off the accelerator because you are coasting or whether you are slowing/stopping.
The SOC control uses route guidance to reduce charge level before long downhill slopes and increase charge level before reaching traffic congestion. I would assume this might not work if you just use Waze or Google Maps for navigation. It says "based on data such as road and traffic information during route guidance" so, perhaps, it doesn't always need your destination and can make some decisions based on the road you are traveling on. The battery only has a capacity to power about a half-mile of EV-only driving so it shouldn't need information about your route more than a mile or two ahead, right?