# US 9,751,522 B2 · Method and system for controlling a hybrid vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,522 B2 - Document ID: US9751522B2 - Status: Granted - Kind: B2 - Application number: 15/090,035 - Filed: 2016-04-04 - Published: 2017-03-16 - Granted: 2017-09-05 - Earliest claimed: 2015-09-12 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Marsella L. White; Michael G. Petrucci - Web page: https://patentgrep.com/patent/US9751522B2 ## CPC - B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion - B60K 6/48: Parallel type - B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 20/15: Control strategies specially adapted for achieving a particular effect - B60W 30/182: Selecting between different operative modes, e.g. comfort and performance modes - B60W 40/10: related to vehicle motion - B60W 50/082: {Selecting or switching between different modes of propelling} - B60W 2510/244: Charge state - B60W 2520/105: Longitudinal acceleration - B60W 2520/125: Lateral acceleration - Y02T 10/62: Hybrid vehicles - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method for controlling a hybrid vehicle includes the following steps: (a) monitoring, via a controller, a magnitude and direction of a lateral acceleration, longitudinal acceleration, and longitudinal deceleration of the hybrid vehicle; (b) determining, via the controller, vehicle operating conditions in which a hybrid powertrain is allowed to operate in a regenerative state based, at least in part, on the magnitude and direction of the lateral acceleration, longitudinal acceleration, and longitudinal deceleration of the hybrid vehicle; and (c) commanding, via the controller, the hybrid powertrain to operate in the regenerative state when the hybrid vehicle is operating in the determined vehicle operating conditions. The vehicle operating conditions depend, at least in part, on operator commands and the current SOC of the energy storage system. ## Claims ### Claim 1 A method of controlling a hybrid vehicle, the hybrid vehicle including a hybrid powertrain, the hybrid powertrain including an energy storage system, a driveline, an internal combustion engine, and an electric machine electrically connected to the energy storage system, the method comprising: monitoring, via a controller, a magnitude and a direction of a lateral acceleration of the hybrid vehicle, a magnitude and a direction of a longitudinal acceleration of the hybrid vehicle, and a magnitude and a direction of a longitudinal deceleration of the hybrid vehicle; determining, via the controller, vehicle operating conditions in which the hybrid powertrain is allowed to operate in a regenerative state based, at least in part, on the magnitude and the direction of the lateral acceleration of the hybrid vehicle, the magnitude and the direction of the longitudinal acceleration of the hybrid vehicle, and the magnitude and the direction of the longitudinal deceleration of the hybrid vehicle, wherein, when the hybrid powertrain operates in the regenerative state, torque is transferred from the driveline to the electric machine, the electric machine operates as a generator in order to convert kinetic energy received from the driveline into electric energy, and the electric machine transmits the electric energy to the energy storage system; commanding, via the controller, the hybrid powertrain to operate in the regenerative state when the hybrid vehicle is operating under the determined vehicle operating conditions; and wherein determining vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state is based, at least in part, on a vehicle operating mode selected by a vehicle operator; and wherein the vehicle operating mode is selected from a group consisting of a quick charge mode, a charge deplete mode, and a track mode. ### Claim 2 (depends on 1) The method of claim 1, wherein commanding the hybrid powertrain to operate in the regenerative state includes commanding the hybrid powertrain to operate in the regenerative state while the hybrid vehicle is accelerating only if the quick charge mode is selected by the vehicle operator. ### Claim 3 (depends on 2) The method of claim 2, further comprising receiving, via the controller, a signal indicative of the magnitude and the direction of the lateral acceleration, the magnitude and the direction of the longitudinal acceleration, and the magnitude and the direction of the longitudinal deceleration of the hybrid vehicle from an inertial sensor. ### Claim 4 (depends on 3) The method of claim 3, wherein determining vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state is based on a current state of charge (SOC) of the energy storage system. ### Claim 5 (depends on 4) The method of claim 4, further comprising calculating, via the controller, a difference between a predetermined target SOC and the current SOC of the energy storage system. ### Claim 6 (depends on 5) The method of claim 5, further comprising comparing the difference between the predetermined target SOC and the current SOC of the energy storage system with a first predetermined threshold in order to determine if the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the first predetermined threshold. ### Claim 7 (depends on 6) The method of claim 6, wherein determining the vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state is based, at least in part, on whether the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the first predetermined threshold. ### Claim 8 (depends on 7) The method of claim 7, further comprising comparing the difference between the predetermined target SOC and the current SOC of the energy storage system with a second predetermined threshold in order to determine if the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the second predetermined threshold, wherein the first predetermined threshold is greater than the second predetermined threshold. ### Claim 9 (depends on 8) The method of claim 8, wherein determining the vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state is based, at least in part, on whether the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the second predetermined threshold. ### Claim 10 (depends on 9) The method of claim 9, further comprising determining, via the controller, whether the hybrid vehicle is being operated in a racetrack fashion based, at least in part, on a lateral acceleration and a speed of the hybrid vehicle. ### Claim 11 (depends on 10) The method of claim 10, wherein determining the vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state is based, at least in part, on whether the hybrid vehicle is being operated in the racetrack fashion. ### Claim 12 A hybrid vehicle, comprising: a hybrid powertrain, wherein the hybrid powertrain includes an energy storage system, a driveline, an internal combustion engine, and an electric machine electrically connected to the energy storage system; a controller in communication with the hybrid powertrain, wherein the controller is programmed to: monitor a magnitude and a direction of a lateral acceleration of the hybrid vehicle, a magnitude and a direction of a longitudinal acceleration of the hybrid vehicle, and a magnitude and a direction of a longitudinal deceleration of the hybrid vehicle; determine vehicle operating conditions in which the hybrid powertrain is allowed to operate in a regenerative state based, at least in part, on the magnitude and the direction of the lateral acceleration of the hybrid vehicle, the magnitude and the direction of the longitudinal acceleration of the hybrid vehicle, and the magnitude and the direction of the longitudinal deceleration of the hybrid vehicle, wherein, when the hybrid powertrain operates in the regenerative state, torque is transferred from the driveline to the electric machine, the electric machine operates as a generator in order to convert kinetic energy received from the driveline into electric energy, and the electric machine transmits the electric energy to the energy storage system; command the hybrid powertrain to operate in the regenerative state when the hybrid vehicle is operating under the determined vehicle operating conditions; and wherein the controller is programmed to determine vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state based, at least in part, on a vehicle operating mode selected by a vehicle operator, and the vehicle operating mode is selected from a group consisting of a quick charge mode, a charge deplete mode, and a track mode. ### Claim 13 (depends on 12) The hybrid vehicle of claim 12, wherein the controller is programmed to command the hybrid powertrain to operate in the regenerative state while the hybrid vehicle is accelerating only if the quick charge mode is selected by the vehicle operator. ### Claim 14 (depends on 13) The hybrid vehicle of claim 13, wherein the controller is programmed to receive a signal indicative of the magnitude and the direction of the lateral acceleration of the hybrid vehicle, the magnitude and the direction of the longitudinal acceleration of the hybrid vehicle, and the magnitude and the direction of the longitudinal deceleration of the hybrid vehicle from an inertial sensor. ### Claim 15 (depends on 14) The hybrid vehicle of claim 14, wherein the controller is programmed to determine vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state based on a current state of charge (SOC) of the energy storage system. ### Claim 16 (depends on 15) The hybrid vehicle of claim 15, wherein the controller is programmed to calculate a difference between a predetermined target SOC and the current SOC of the energy storage system. ### Claim 17 (depends on 16) The hybrid vehicle of claim 16, wherein the controller is programmed to compare the difference between the predetermined target SOC and the current SOC of the energy storage system with a first predetermined threshold in order to determine if the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the first predetermined threshold. ### Claim 18 (depends on 17) The hybrid vehicle of claim 17, wherein the controller is programmed to determine the vehicle operating conditions in which the hybrid powertrain is allowed to operate in the regenerative state based, at least in part, on whether the difference between the predetermined target SOC and the current SOC of the energy storage system is greater than the first predetermined threshold.