# US 2016/0355175 A1 · Method and device for operating 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 2016/0355175 A1 - Document ID: US20160355175A1 - Status: Published application - Kind: A1 - Application number: 15/104,593 - Filed: 2014-11-14 - Published: 2016-12-08 - Earliest claimed: 2013-12-19 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Peter Maigler - Web page: https://patentgrep.com/patent/US20160355175A1 ## CPC - B60W 20/50: Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 30/02: Control of vehicle driving stability - B60W 50/038: Limiting the input power, torque or speed - B60W 2530/209: Fuel quantity remaining in tank - B60W 2710/0666: Engine torque - B60W 2710/083: Torque - B60W 2710/086: Power - B60Y 2200/92: Hybrid vehicles - B60Y 2300/188: Controlling power parameters of the driveline, e.g. determining the required power - Y02T 10/62: Hybrid vehicles - Y10S 903/93: Conjoint control of different elements - 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 - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A method (110), a device (10), and a powertrain (70) are provided for the safe operation of a hybrid vehicle (20). The hybrid vehicle has at least one first (30) and one second (40) drive assembly. The drive assemblies in each case drive the hybrid vehicle, alone or jointly in a hybrid type of operation. The first drive assembly is operated using fuel from a fuel tank (50). An amount of fuel in this fuel tank is monitored. If the amount of fuel is smaller than a specifiable value, then a safety operation of the hybrid vehicle is activated. During the safety operation, the output of the second drive assembly is reduced if the hybrid vehicle is driven using a type of operation which negatively influences the driving dynamics of the hybrid vehicle in the case of a failure of the first drive assembly. ## Claims ### Claim 1 A method (110) of operation of a hybrid vehicle (20), wherein the hybrid vehicle (20) has a first (30) and a second (40) drive assembly, wherein the drive assemblies (30, 40) in each case drive the hybrid vehicle (20), alone or jointly in a hybrid type of operation, wherein the first drive assembly (30) is operated with fuel from a fuel tank (50) and an amount of fuel in the fuel tank (50) is monitored (120, 160), wherein a safety operation (130) of the hybrid vehicle is activated if the amount of fuel is smaller than a specifiable value (150, 170), characterized in that the output of the second drive assembly (40) is reduced during the safety operation (130) if a type of operation is being used which negatively influences the driving dynamics of the hybrid vehicle (20) in the case of a failure of the first drive assembly (30). ### Claim 2 (depends on 1) The method according to claim 1, characterized in that the output of the second drive assembly (40) is reduced during the safety operation (130) if a hybrid type of operation is being used which negatively influences the driving dynamics of the hybrid vehicle (20) in the case of a failure of the first drive assembly (30). ### Claim 3 (depends on 1) The method according to claim 1, characterized in that the output of the second drive assembly (40) is reduced during the safety operation (130) if a type of operation is-being used in which the output of the second drive assembly (40) negatively influences the driving dynamics of the hybrid vehicle (20) in the case of a failure of the first drive assembly (30). ### Claim 4 (depends on 1) The method according to claim 1, characterized in that the output of the second drive assembly (40) is reduced during the safety operation (130) if a type of operation is being used in which the torque of the second drive assembly (40) is directed oppositely to the torque of the first drive assembly (30). ### Claim 5 (depends on 1) The method according to claim 1, characterized in that the output of the drive assembly (40) is reduced during the safety operation (130) if a type of operation is being used in which the acceleration about the transverse axis, vertical axis or longitudinal axis of the hybrid vehicle (20), which takes effect in the case of a failure of the first drive assembly (30), is intensified by the output of the second drive assembly (40). ### Claim 6 (depends on 2) The method according to claim 2, characterized in that the output of the second drive assembly (40) is reduced during the safety operation in the hybrid type of operation of load point shift or torque vectoring. ### Claim 7 (depends on 1) The method according to claim 1, characterized in that the second drive assembly (40) is switched off during the safety operation (130) if a type of operation is being used which negatively influences the driving dynamics of the hybrid vehicle in the case of a failure of the first drive assembly (30). ### Claim 8 A device (10) for the operation of a hybrid vehicle (20), wherein the hybrid vehicle (20) has a first (30) and a second (40) drive assembly, wherein the drive assemblies (30, 40) in each case drive the hybrid vehicle (20), alone or jointly in a hybrid type of operation, wherein the first drive assembly (30) is operated with fuel from a fuel tank (50) and a sensor device (60) monitors an amount of fuel in the fuel tank (60), wherein the device (10) activates a safety operation (130) of the hybrid vehicle (20) if the amount of fuel is smaller than a specifiable value, characterized in that the device (10) reduces the output of the second drive assembly (40) during the safety operation (130) if a type of operation is being used which negatively influences the driving dynamics of the hybrid vehicle (20) in the case of a failure of the first drive assembly (30). ### Claim 9 A powertrain (70) for a hybrid vehicle (20) comprising a first (30) and a second (40) drive assembly, wherein the drive assemblies (30, 40) in each case drive the hybrid vehicle (20), alone or jointly in a hybrid type of operation, wherein the first drive assembly (30) is operated with fuel from a fuel tank (50), wherein the powertrain (70) comprises a sensor device (60) which monitors an amount of fuel in the fuel tank (50) and a device (10) which activates a safety operation (130) of the hybrid vehicle (20) if the amount of fuel is smaller than a specifiable value, characterized in that the device (10) reduces the output of the second drive assembly (40) during the safety operation (130) if a type of operation is being used which negatively influences the driving dynamics of the hybrid vehicle (20) in the case of a failure of the first drive assembly (30). ### Claim 10 (depends on 9) The powertrain according to claim 9, characterized in that the first drive assembly (30) is an internal combustion engine and the second drive assembly (40) is an electrical machine. ### Claim 11 (depends on 9) The powertrain according to claim 9, characterized in that the first drive assembly (30) is an internal combustion engine. ### Claim 12 (depends on 9) The powertrain according to claim 9, characterized in that the second drive assembly (40) is an electrical machine.