System and method for determining deceleration based on environmental information

1 . A system that implements a dynamically adjusting coasting regeneration for an electrified vehicle, the system comprising:

an electrified powertrain including an electric motor that provides drive torque to a driveline, the electric motor further providing regenerative braking energy to a battery system during a deceleration event;

a first sensor that senses dynamic artifact data and provides a first signal indicative of the dynamic artifact data;

a second sensor that senses one of static and pseudo-static artifact data and provides a second signal indicative of the static and pseudo-static artifact data;

a controller configured to:

receive a current velocity of the vehicle;

determine a first candidate deceleration rate based on the first signal comprising:

determine a first aggressive deceleration rate, a first mild deceleration rate and a first low deceleration rate; and

interpolate an optimized first deceleration rate candidate based on the first aggressive, mild and low deceleration rate;

determine a second candidate deceleration rate based on the second signal comprising:

determine a second aggressive deceleration rate, a second mild deceleration rate and a second low deceleration rate; and

interpolate an optimized second deceleration rate candidate based on the second aggressive, mild and low deceleration rate;

select one of the optimized first and second deceleration rate candidates as a selected deceleration rate that corresponds to a most aggressive deceleration rate candidate;

estimate a first proposed change in velocity over a first time based on the first and second deceleration rates;

determine a second proposed change in velocity over a second time based on the first proposed change in velocity;

determine a proposed total distance travelled by the vehicle based on the second proposed change in velocity;

determine whether a target velocity has been reached based on the proposed total distance;

select the proposed total distance as a confirmed calculated distance based on a determination that the target velocity has been reached;

determine a wheel torque based on the selected deceleration rate and confirmed calculated distance; and

execute the determined wheel torque by the electrified powertrain to achieve the selected deceleration rate while providing optimized regenerative braking energy to the battery system.

2 . The system of claim 1 , wherein control is further configured to:

provide a torque request to the electrified powertrain indicative of a determination that the target velocity has been reached.

3 . The system of claim 1 , wherein control is further configured to:

determine whether a maximum time has been reached based on the target velocity not being reached.

4 . The system of claim 1 , wherein the first sensor comprises one of a camera and radar that senses a moving object.

5 . The system of claim 1 , wherein the second sensor comprises a global positioning system (GPS) that provides data indicative of a road sign, an intersection, a road slop slope and road form.

6 . The system of claim 1 , wherein the controller is further configured to determine a proposed total distance travelled by the vehicle including:

determine target distances between aggressive and medium distances;

determine a first bias factor between the aggressive and medium distances; and

implement the first bias factor to interpolate a deceleration between aggressive and medium distances.

7 . The system of claim 6 , wherein the controller is further configured to determine a proposed total distance travelled by the vehicle including:

determine target distances between medium and low distances;

determine a bias factor between the medium and low distances; and

implement the second bias factor to interpolate a deceleration between medium and low distances.

8 . A method for dynamically adjusting coasting regeneration for an electrified vehicle, the electrified vehicle having a first sensor that senses dynamic artifact data and provides a first signal indicative of the dynamic artifact data, a second sensor that senses one of static and pseudo-static artifact data and provides a second signal indicative of the static and pseudo-static artifact data, the method comprising:

receiving, at a controller, a current velocity of the vehicle;

determining, at the controller, a first candidate deceleration rate based on the first signal comprising:

determining a first aggressive deceleration rate, a first mild deceleration rate and a first low deceleration rate; and

interpolating an optimized first deceleration rate candidate based on the first aggressive, mild and low deceleration rate;

determining, at the controller, a second candidate deceleration rate based on the second signal comprising:

determining a second aggressive deceleration rate, a second mild deceleration rate and a second low deceleration rate; and

interpolating an optimized second deceleration rate candidate based on the second aggressive, mild and low deceleration rate;

selecting, at the controller, one of the optimized first and second deceleration rate candidates as a selected deceleration rate that corresponds to a most aggressive deceleration rate candidate;

estimating, at the controller, a first proposed change in velocity over a first time based on the first and second deceleration rates;

determining, at the controller, a second proposed change in velocity over a second time based on the first proposed change in velocity;

determining, at the controller, a proposed total distance travelled by the vehicle based on the second proposed change in velocity;

determining, at the controller, whether a target velocity has been reached based on the proposed total distance;

selecting, at the controller, the proposed total distance as a confirmed calculated distance based on a determination that the target velocity has been reached;

determining, at the controller, a wheel torque based on the selected deceleration rate and confirmed calculated distance; and

executing, at the controller, the determined wheel torque by the electrified powertrain to achieve the selected deceleration rate while providing optimized regenerative braking energy to the battery system.

9 . The method of claim 8 , further comprising:

providing a torque request to the electrified powertrain indicative of a determination that the target velocity has been reached.

10 . The method of claim 8 , further comprising:

determining whether a maximum time has been reached based on the target velocity not being reached.

11 . The method of claim 8 , wherein the proposed total distance travelled by the vehicle includes:

determining target distances between aggressive and medium distances;

determining a first bias factor between the aggressive and medium distances; and

implementing the first bias factor to interpolate a deceleration between aggressive and medium distances.

12 . The method of claim 11 , wherein the proposed total distance travelled by the vehicle includes:

determining target distances between medium and low distances;

determining a bias factor between the medium and low distances; and

implementing the second bias factor to interpolate a deceleration between medium and low distances.

13 . The method of claim 8 , wherein the first sensor comprises one of a camera and radar that senses a moving object.

14 . The method of claim 8 , wherein the second sensor comprises a global positioning system (GPS) that provides data indicative of a road sign, an intersection, a road slope and road form.