# US 11,305,758 B2 · Method and device for determining a maximum speed for a vehicle and automatic drive system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,758 B2 - Document ID: US11305758B2 - Status: Granted - Kind: B2 - Application number: 16/485,694 - Filed: 2017-12-13 - Published: 2020-01-02 - Granted: 2022-04-19 - Earliest claimed: 2017-02-15 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Hans-Leo Ross; Thomas Friedrich - Web page: https://patentgrep.com/patent/US11305758B2 ## CPC - B60W 30/09: Taking automatic action to avoid collision, e.g. braking and steering - B62D 15/0285: {Parking performed automatically} - B60W 2520/04: Vehicle stop - B60W 2520/10: Longitudinal speed - B60W 2554/00: Input parameters relating to objects - B60Y 2302/05: Leading to automatic stopping of the vehicle - 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 - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A method for determining a maximum speed for a vehicle, including: receiving items of state information concerning a state of at least one vehicle component of the vehicle; and determining a maximum speed of the vehicle on the basis of the state information, such that a stopping path of the vehicle from a recognition of a dangerous state until the vehicle is at a standstill is less than or equal to a specified value. ## Claims ### Claim 1 A method of a vehicle, the method comprising: the vehicle monitoring a state of a braking system of the vehicle; a processor of the vehicle determining, as a first time period and based on the monitored state of the braking system, an amount of time required for building up a maximum braking potential in the braking system; the processor determining, as a second time period, an amount of time required to bring the vehicle to a standstill after the maximum braking potential is built up in the braking system; the processor determining a maximum speed of the vehicle based on the first and second time periods, such that a stopping path of the vehicle from a recognition of a dangerous state until the vehicle is at a standstill is less than or equal to a specified value; and the processor outputting an indication of the determined maximum speed to a user interface or performing an automatic control of the vehicle speed based on the determined maximum speed. ### Claim 2 (depends on 1) The method of claim 1, further comprising the vehicle monitoring a state of at least one vehicle sensor of the vehicle and, based on the state of the at least one vehicle sensor, a recognition time required for the recognition of the dangerous state, wherein the maximum speed is determined additionally based on the recognition time. ### Claim 3 (depends on 2) The method of claim 2, further comprising the vehicle monitoring a state of a communication system between the brake system and the at least one vehicle sensor and the processor determining a communication time for a communication between the brake system and the at least one vehicle sensor, wherein the maximum speed is determined additionally based on the communication time. ### Claim 4 A device of a vehicle, the device comprising: a processor; and an input interface; wherein the processor is configured to: receive state information about, and obtained by the vehicle monitoring, a state of a braking system of the vehicle; determine, as a first time period and based on the monitored state of the braking system, an amount of time required for building up a maximum braking potential in the braking system; determine, as a second time period, an amount of time required to bring the vehicle to a standstill after the maximum braking potential is built up in the braking system; determine the maximum speed of the vehicle based on the first and second time periods so that a stopping path of the vehicle from a recognition of a dangerous state until the vehicle is at a standstill is less than or equal to a specified value; and output an indication of the determined maximum speed to a user interface of the device or perform an automatic control of the vehicle speed based on the determined maximum speed. ### Claim 5 (depends on 4) The device of claim 4, wherein the processor is configured to receive state information about, and obtained by the vehicle monitoring, a state of at least one vehicle sensor of the vehicle and calculate, based on the state of the at least one vehicle sensor, a recognition time that is required to recognize the dangerous state, and wherein the maximum speed is determined additionally based on the recognition time. ### Claim 6 (depends on 5) The device of claim 5, wherein the processor is configured to receive state information about, and obtained by the vehicle monitoring, a state of a communication system between the brake system and the at least one vehicle sensor and calculate, based on the state of the communication system, a communication time for a communication between the brake system and the at least one vehicle sensor, and wherein the maximum speed is determined additionally based on the communication time. ### Claim 7 An automated driving system for a vehicle, the automated driving system comprising: a device including a processor and an input interface, wherein the processor is configured to: receive state information about, and obtained by the vehicle monitoring, a state of a braking system of the vehicle; determine, as a first time period and based on the monitored state of the braking system, an amount of time required for building up a maximum braking potential in the braking system; determine, as a second time period, an amount of time required to bring the vehicle to a standstill after the maximum braking potential is built up in the braking system; determine the maximum speed of the vehicle based on the first and second time periods so that a stopping path of the vehicle from a recognition of a dangerous state until the vehicle is at a standstill is less than or equal to a specified value; perform an automatic control of the vehicle speed based on the determined maximum speed. ### Claim 8 (depends on 1) The method of claim 1, wherein the first time period is an amount of time required for a maximal brake pressure build up in hydraulics of the braking system. ### Claim 9 (depends on 1) The method of claim 1, wherein the method comprises the processor performing the automatic control of the vehicle speed based on the determined maximum speed.