# US 9,038,589 B2 · Method for controlling a micro-hybrid system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,589 B2 - Document ID: US9038589B2 - Status: Granted - Kind: B2 - Application number: 13/392,990 - Filed: 2010-07-26 - Published: 2012-11-29 - Granted: 2015-05-26 - Earliest claimed: 2009-09-02 - Assignees: Valeo Equipement Electriques Moteur - Applicants: Cyril Granziera - Inventors: Cyril Granziera - Web page: https://patentgrep.com/patent/US9038589B2 ## CPC - F02N 11/04: the motors being associated with current generators - F02N 11/006: {using a plurality of electric motors} - F02N 11/0814: {comprising means for controlling automatic idle-start-stop} - F02N 11/0844: {with means for restarting the engine directly after an engine stop request, e.g. caused by change of driver mind} - F02N 11/0859: {specially adapted to the type of the starter motor or integrated into it} - B60K 2006/268: {Electric drive motor starts the engine, i.e. used as starter motor} - B60L 2240/421: Speed - B60W 2510/081: Speed - F02D 2041/2027: {Control of the current by pulse width modulation or duty cycle control} - F02D 2041/2044: {using pre-magnetisation or post-magnetisation of the coils} - F02N 2200/041: Starter speed - Y02T 10/40: Engine management systems - Y02T 10/64: Electric machine technologies in electromobility - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - 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 - 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 - 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 of controlling a vehicle associated micro-hybrid system. The system includes a reversible rotary electrical machine that is connected to a thermal engine of a motor vehicle. The method includes: controlling a step of pre-fluxing of a rotor of the reversible rotary electrical machine when a control module receives an instruction to start the thermal engine via the reversible rotary electrical machine; measuring a speed of the rotor of the reversible rotary electrical machine; and, demanding stoppage of the pre-fluxing step when the speed of the rotor is greater than or equal to a predetermined speed threshold value. The method avoids the generation of overvoltages in an electrical distribution network formed by an onboard network of the vehicle and by an energy storage unit of the micro-hybrid system. ## Claims ### Claim 1 A control module (4) of a micro-hybrid system (1), comprising a reversible rotary electrical machine (2) connected to a thermal engine (9) of a motor vehicle, the control module comprising: means for con trolling a step of pre-fluxing of a rotor of the reversible rotary electric machine when the control module receives an instruction to start the thermal engine via the reversible rotary electrical machine, means for measuring a speed of the rotor (Nr) of the reversible rotary electrical machine, and means for demanding stoppage of the pre-fluxing step when the speed of the rotor is greater than or equal to a predetermined speed threshold value (Nthreshold1). ### Claim 2 A method of controlling a micro-hybrid system (1) comprising a reversible rotary electrical machine (2) connected to a thermal engine (9) of a motor vehicle, and a control module, the method comprising the following steps: controlling a step of pre-fluxing of a rotor of the reversible rotary electrical machine when the control module receives an instruction to start the thermal engine via the reversible rotary electrical machine, measuring a speed (Nr) of the rotor of the reversible rotary electrical machine, and demanding stoppage of the pre-fluxing step when the speed of the rotor is greater than or equal to a predetermined speed threshold value (Nthreshold1). ### Claim 3 (depends on 2) The method according to claim 2, wherein the predetermined threshold value (Nthreshold1) corresponds substantially to the speed of the rotor (Nr) at which the reversible rotary electrical machine (2) commences providing an electrical supply, in particular to an electrical distribution network (5) of the motor vehicle. ### Claim 4 (depends on 2) The method according to claim 2, further comprising a step of inhibiting the pre-fluxing step in order to prevent the prefluxing step being repeated before the thermal engine (9) starts. ### Claim 5 (depends on 2) The method according to claim 2, further comprising a step of starting the thermal engine (9) via the reversible rotary electrical machine (2) by actuating the motor mode of the rotary electrical machine. ### Claim 6 (depends on 5) The method according to claim 5, further comprising a step of controlling a duty cycle of the machine (2) at a value of 100% while supplying torque to the thermal engine (9). ### Claim 7 (depends on 2) The method according to claim 2, further comprising a step of idle state of the reversible rotary electrical machine (2) while keeping the generating mode of the rotary electrical machine. ### Claim 8 (depends on 7) The method according to claim 7, further comprising a step of controlling a duty cycle of the rotary electrical machine (2) at a value less than or equal to 50% while supplying electrical energy. ### Claim 9 (depends on 8) The method according to claim 8, further comprising a step of starting the thermal engine (9) with an auxiliary starter (12) of the micro-hybrid system (1). ### Claim 10 (depends on 9) The method according to claim 9, wherein the method controls an AC to DC converter (3) of the micro-hybrid system (1), the converter is connected to the reversible rotary electrical machine (2).