Ford Global Technolgoies, LLC

Yanan Zhao

Ming Lang Kuang

Bernard D Nefcy

Mark Steven Yamazaki

Xiaohong Nina Duan

Jeffrey Allen Doering

Rajit Johri

Jason Meyer

Xiaoyong Wang

Walter Joseph Ortmann

Chen Zhang

Francis Thomas Connolly

Zhengyu Dai

Christopher John Teslak

Judhajit Roy

Dale Scott Crombez

Wei Liang

Yixin Yao

Daniel Scott Colvin

Stuart N Ford

Fazal Urrahman Syed

Ralph Wayne Cunningham

Bradley Dean Riedle

Angel Fernando Porras

Tobias John Pallett

Anthony Mark Phillips

Todd Mccullough

Nicholas Dashwood Crisp

Joseph Jay Torres

Mark Davison

Robert Taenaka

Girish Gokul Chennupalli

Zheng Liu

Felix Nedorezov

William David Treharne

Mathew Alan Boesch

Hai Yu

Li Xu

Matthew John Shelton

Carol Louise Okubo

Sangeetha Sangameswaran

Scott J Lauffer

Jordan Mazaira

Stanley Larue Bower

George Edmund Walley

David John Messih

Lucian Lippok

Maruthi Thiruninravur Ravichandran

David H Schmitt

Julia Helen Buckland Seeds

Chenliu Stephen Lu

Ming Cheng

Alex Szczepaniak

Stan L Bower

Roy S Schafer

James Joseph Reynolds

Philip J Wiethe, Jr

Methods and systems are provided for operating an electric vehicle during conditions when output of an electric energy storage device is limited. In one example, torque commands of left and right electric machines are adjusted in equal amounts so that output of the electric energy storage device may be limited. The approach may be applied to electric machines on front and rear sides of an electric vehicle.

Methods and system for balancing torque request during battery power control

Methods and systems for a vehicle are provided. A method for a vehicle includes coupling two motors to an axle. Furthermore, the method includes, at each of the two motors, setting a requested motor torque to a permitted motor torque in compliance with a threshold motor power, determining an unmet motor torque as a difference between the requested and the permitted motor torque, and balancing the unmet motor torque, including reducing the permitted motor torque at one or both of the two motors.

Methods and systems for controlling electric motor torque in a battery electric vehicle

Methods and systems for controlling a temperature of an electric energy storage device of via a cooling device are disclosed. In one example, a temperature of an electric energy storage device may be permitted to increase when a vehicle is within a threshold distance of an expected parking location of the vehicle so that less electrical energy of the electric energy storage device may be consumed.

Methods and system for thermal management of an electric energy storage device

An electrified vehicle includes a traction battery, an engine, and a controller. The controller is configured to generate a request for the engine in response to an input passing a threshold and to adjust the threshold when a state of health (SOH) of the traction battery is at a chance of violating a target, such as a warranty target. The request for the engine may be an engine pull up (EPU) request for starting the engine with the threshold being an EPU threshold in which case the controller lowers the EPU threshold when the battery SOH is at a chance of violating the target. The request for the engine may be an engine pull down (EPD) request for stopping the engine with the threshold being an EPD threshold in which case the controller lowers the EPD threshold when the battery SOH is at a chance of violating the target.

Electrified vehicle configured to adjust engine pull up/down thresholds based on battery state of health

Methods and systems are provided for adjusting driver demand wheel torque of a vehicle. The driver demand wheel torque may be adjusted as a function of a minimum wheel torque. The minimum wheel torque may be determined according to a plurality of torques that may be evaluated in three different phases.

Method and system for adjusting a minimum driver demand wheel torque

Methods and systems are provided, including a method for an electric vehicle battery distribution among at least three motors. The method may comprise selecting a first drive path with at least first and second motors for an open-loop power allocation control, designating a second drive path with at least a third motor for an open-loop or a closed-loop power allocation control, determining a power allocation ratio of each motor relative to a total power; and operating the each motors with adjusted power limits based on the determined power allocation ratios.

Methods and systems for battery power allocation control in a BEV

Systems and methods for improving operation of a vehicle are presented. In one example, a controller may respond to a presence or absence of a prediction of an increase in vehicle speed during a look ahead window. The controller may inhibit or allow automatic engine stopping in response to the presence or absence of the prediction of the increase in vehicle speed during the look ahead window.

Methods and systems for inhibiting automatic engine shutdown

A system and method for intelligent battery charging management to improve battery life and charging efficiency of high capacity batteries that may not be deeply discharged on a regular basis may learn driving habits automatically and/or with user input and select an ending state-of-charge (SOC) to limit battery charging to less than maximum capacity based on current and/or anticipated ambient temperature and battery health of life (HOL). An expected vehicle travel distance before the next charge may be learned or determined based on vehicle or user inputs. An ending SOC based on battery temperature, a delta SOC to meet propulsive energy for the expected travel distance, cycling effect (depth of discharge) on battery HOL for a given delta SOC, and/or battery working efficiency may be used to control charging of the vehicle battery.

Intelligent vehicle battery charging for high capacity batteries

This disclosure relates to an electrified vehicle configured to selectively deactivate a restricted power mode based on an acceleration request, such as an imminent or current acceleration request. A corresponding method is also disclosed. An example electrified vehicle includes a battery and a controller configured to apply a restricted power mode when a state of health of the battery is below a predefined lower threshold. Further, when in the restricted power mode, the controller is configured to limit an amount of power drawn from the battery. Additionally, the controller is configured to selectively deactivate the restricted power mode in response to a signal indicating a current or imminent request for acceleration of the electrified vehicle requiring power to be drawn from the battery above an upper limit of the restricted power mode.

Electrified vehicle configured to selectively deactivate restricted power mode based on acceleration request

This disclosure relates to an electrified vehicle with a thermal management system for a battery. A corresponding method is also disclosed. An example electrified vehicle includes a battery and a thermal management system configured to thermally condition the battery at one of a plurality of thermal conditioning levels. Each of the thermal conditioning levels corresponds to a respective one of a plurality of battery temperature thresholds. The electrified vehicle further includes a controller. The controller is configured to determine which of the plurality of battery temperature thresholds is met or exceeded based on a temperature of the battery and to command the thermal management system to thermally condition the battery at corresponding one of the plurality of thermal conditioning levels. Further, when a state of health of the battery is outside a predefined range, the controller is configured to adjust each of the plurality of battery temperature thresholds.

Electrified vehicle with battery thermal management system configured to adjust temperature thresholds based on battery state of health

A power system includes a primary bus connected to a traction battery, a secondary bus connected to an auxiliary battery, a power converter between the traction and auxiliary batteries, and a controller. The controller commands the power converter to increase a magnitude of current output to the secondary bus when an amount of charge current received by the traction battery exceeds a first amount threshold and commands the power converter to decrease the magnitude when an amount of charge current received by the auxiliary battery exceeds a second amount threshold.

Battery thermal management via current control

A hybrid electric vehicle having one or more controllers, at least two independently driven electric machines (EMs) that are each coupled to separate drive wheels, and controllers configured to generate a torque split ratio responsive to lateral acceleration and/or unequal friction coefficients detected during braking, and to generate electric power with the motors by regeneratively braking each wheel with unequal torques adjusted by the ratio, such that combined wheel braking torques do not exceed a total braking torque limit for the vehicle. In some configurations, the controller(s) generate the torque split ratio by a predetermined lookup table that maps a plurality of torque split ratios to lateral accelerations, the coefficients, and other parameters. Further arrangements include the controller(s) coupled with sensors that detect wheel slip and yaw rate, and responsive to a braking signal, the controller(s) disengage regenerative braking when the wheel slip and/or vehicle yaw are detected.

Hybrid electric vehicle with torque split regenerative braking

Systems and methods for operating an engine that may be selectively automatically stopped and started are described. In one example, the method adjusts an amount of time that the engine may be inhibited from automatically stopping based on driver inputs such as driver demand pedal position, vehicle speed, and braking torque.

Methods and system for operating an engine

A vehicle includes an electric machine, friction brakes, a drivetrain, and a controller. The electric machine is configured to recharge a battery during regenerative braking. The friction brakes are configured to apply torque to wheels of the vehicle to slow the vehicle. The controller is programmed to, in response to and during an anti-locking braking event, generate a signal indicative of a total torque demand to brake the vehicle based on a difference between a desired wheel slip ratio and an actual wheel slip ratio, adjust a regenerative braking torque based on a product of the signal and a regenerative braking weighting coefficient, adjust a friction braking torque based on a product of the signal and a friction braking weighting coefficient, and further adjust the regenerative braking torque based on a closed-loop control of an estimated regenerative braking torque feedback.

Regenerative braking and anti-lock braking control system

Growing community of inventors

Ann Arbor, MI, United States of America

Yanan Zhao