Control of user-selectable vehicle deceleration rate to maximize regeneration for electrified propulsion systems

An electrical regeneration and vehicle deceleration control method for an electrified vehicle having an electrified powertrain comprising an engine and at least one electric motor, the method comprising:

• operating, by a controller of the electrified vehicle, the electrified powertrain in a normal regeneration mode associated with a first electrical regeneration and a first vehicle deceleration rate or a maximum regeneration mode associated with a second electrical regeneration and a second vehicle deceleration rate that are greater than the first electrical regeneration rate and the first vehicle deceleration rate, respectively;
• receiving, by the controller and via the user interface, an input from a driver of the vehicle indicative of a request to enable the maximum regeneration mode;
• detecting, by the controller, a status of the maximum regeneration mode, wherein the status is indicative of an availability of the maximum regeneration mode;
• and
• in response to receiving the request and based on the status of the maximum regeneration mode and a current vehicle deceleration rate:
• (i) operating, by the controller, the electrified powertrain in either the maximum regeneration mode or the normal regeneration mode;
• (ii) selectively outputting, by the controller and via the user interface, a message to the driver indicative of the status of the maximum regeneration mode;
• and
• (iii) selectively commanding, by the controller, a hydraulic brake system of the vehicle to generate brake force based on a driver-expected vehicle deceleration rate associated with the operative regeneration mode,
• wherein when the status indicates that the maximum regeneration mode is available, the method further comprises:
• determining, by the controller, whether the engine is connected to a transmission of the electrified vehicle;
• when the engine and the transmission are connected, operating, by the controller, the electrified powertrain such that kinetic energy at the engine and the at least one electric motor is collectively converted into electrical energy at the second electrical regeneration rate;
• and
• when the engine and the transmission are disconnected, operating, by the controller, the electrified powertrain such that kinetic energy at the at least one electric motor is converted into electrical energy at the second electrical regeneration rate.

An electrical regeneration and vehicle deceleration control method for an electrified vehicle having an electrified powertrain comprising an engine and at least one electric motor, the method comprising:

• operating, by a controller of the electrified vehicle, the electrified powertrain in a normal regeneration mode associated with a first electrical regeneration and a first vehicle deceleration rate or a maximum regeneration mode associated with a second electrical regeneration and a second vehicle deceleration rate that are greater than the first electrical regeneration rate and the first vehicle deceleration rate, respectively;
• receiving, by the controller and via the user interface, an input from a driver of the vehicle indicative of a request to enable the maximum regeneration mode;
• detecting, by the controller, a status of the maximum regeneration mode, wherein the status is indicative of an availability of the maximum regeneration mode, wherein detecting the status of the maximum regeneration mode is based on (i) whether a malfunction of the vehicle that would limit the maximum regeneration mode is present, (ii) whether the vehicle malfunction is recoverable, and (iii) when the vehicle malfunction is recoverable, whether the vehicle malfunction has recovered;
• and
• in response to receiving the request and based on the status of the maximum regeneration mode and a current vehicle deceleration rate:
• (i) operating, by the controller, the electrified powertrain in either the maximum regeneration mode or the normal regeneration mode;
• (ii) selectively outputting, by the controller and via the user interface, a message to the driver indicative of the status of the maximum regeneration mode;
• and
• (iii) selectively commanding, by the controller, a hydraulic brake system of the vehicle to generate brake force based on a driver-expected vehicle deceleration rate associated with the operative regeneration mode.