# US 8,751,080 B2 · Method and device for operating a drive train for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,751,080 B2 - Document ID: US8751080B2 - Status: Granted - Kind: B2 - Application number: 13/133,017 - Filed: 2009-11-25 - Published: 2011-11-24 - Granted: 2014-06-10 - Earliest claimed: 2008-12-10 - Assignees: Robert Bosch GmbH - Applicants: Alexander Maass - Inventors: Alexander Maass - Web page: https://patentgrep.com/patent/US8751080B2 ## CPC - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60K 6/48: Parallel type - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 30/1882: {characterised by the working point of the engine, e.g. by using engine output chart} - B60L 2240/486: Operating parameters - B60W 2710/0672: Torque change rate - B60W 2710/105: Output torque - F02D 11/105: {characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque} - F02D 2250/21: during a transition between engine operation modes or states - 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 - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method and a device for operating a drive train for a vehicle is described, which has at least one drive unit, which is suitable for outputting a drive torque. The rates of change for triggering a torque increase and a torque reduction of the drive torque of the at least one drive unit are specified. This occurs in such a way that the specifiable rates of change of the torque increase and the torque reduction of the drive torque of the at least one drive unit are different. ## Claims ### Claim 1 A method for operating a drive train for a vehicle, which has at least one drive unit suitable for outputting a drive torque, the method comprising: specifying rates of change for triggering a torque increase and a torque reduction of the drive torque of the at least one drive unit, wherein the rates of change are specified in such a way that the rates of change of the torque increase and of the torque reduction of the drive torque of the at least one drive unit are different. ### Claim 2 (depends on 1) The method as recited in claim 1, wherein the drive train is designed as a drive train for a hybrid vehicle. ### Claim 3 (depends on 1) The method as recited in claim 1, wherein the drive train has multiple drive units which are suitable for outputting a drive torque, a total drive torque resulting from a sum of the drive torques of the individual drive units. ### Claim 4 (depends on 3) The method as recited in claim 3, wherein the rates of change for triggering a torque increase and a torque reduction of the total drive torque of the individual drive units are specifiable, the specifiable rates of change of the torque increase and the torque reduction of the total drive torque of the individual drive units being different. ### Claim 5 (depends on 1) The method as recited in claim 1, wherein at least one drive unit is an electric machine. ### Claim 6 (depends on 1) The method as recited in claim 1, wherein the rates of change for a torque increase result as a function of predefined rates of change for a torque reduction. ### Claim 7 (depends on 1) The method as recited in claim 1, wherein the predefined rates of change for a torque reduction result as a function of the rates of change for a torque increase. ### Claim 8 (depends on 6) The method as recited in claim 6, wherein the rates of change for a torque increase result as a function of the rates of change for a torque reduction by multiplication of the rates of change for a torque reduction by a factor not equal to 1. ### Claim 9 (depends on 1) The method as recited in claim 1, wherein the rates of change of the drive torque of the drive unit are predefined with the aid of at least one characteristic curve. ### Claim 10 A device for operating a drive train for a vehicle which has at least one drive unit suitable for outputting a drive torque, the device comprising: at least one controller configured to specify rates of change for triggering a torque increase and a torque reduction of the drive torque of the drive unit, the specifiable rates of change being specified in such a way that the rates of change of the torque increase and of the torque reduction of the drive torque of the at least one drive unit are different.