# US 9,944,272 B2 · Electromechanical power transmission chain for a working machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,944,272 B2 - Document ID: US9944272B2 - Status: Granted - Kind: B2 - Application number: 14/944,530 - Filed: 2015-11-18 - Published: 2016-05-26 - Granted: 2018-04-17 - Earliest claimed: 2014-11-21 - Assignees: Visedo Oy - Applicants: Visedo Oy - Inventors: Kimmo Rauma; Tero Jarvelainen - Web page: https://patentgrep.com/patent/US9944272B2 ## CPC - B60W 20/15: Control strategies specially adapted for achieving a particular effect - B60K 6/442: Series-parallel switching type - B60K 6/46: Series type - B60L 50/15: with additional electric power supply (with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61) - B60L 50/40: using propulsion power supplied by capacitors - B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles - B60L 50/62: charged by low-power generators primarily intended to support the batteries, e.g. range extenders - B60W 10/06: including control of combustion engines - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/26: for electrical energy, e.g. batteries or capacitors - F02D 41/2406: {using essentially read only memories} - F02D 41/26: using computer, e.g. microprocessor - F02D 41/3005: {Details not otherwise provided for} - B60L 2200/40: Working vehicles - B60L 2240/44: related to combustion engines - B60L 2240/443: Torque - B60W 2300/17: Construction vehicles, e.g. graders, excavators - B60W 2710/0616: Position of fuel or air injector - B60W 2710/0627: Fuel flow rate - B60W 2710/086: Power - Y02T 10/62: Hybrid vehicles - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - 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 - 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 - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An electromechanical power transmission chain comprises an electrical machine (101) connectable to a combustion engine and to a mechanical load, a storage circuit (104) for storing electrical energy, an electronic power converter (109) for transferring electrical energy between the storage circuit and the electrical machine, and a control system (110) for controlling the combustion engine and the electronic power converter. The control system controls the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation where power demand of the mechanical load is above an advantageous power range of the combustion engine. The control system limits the fuel supply of the combustion engine during the peak-load situation so as to restrain the fuel consumption from increasing due to the peak-load situation. ## Claims ### Claim 1 An electromechanical power transmission chain comprising: an electrical machine having a rotor for being in a torque transfer connection with a shaft of a combustion engine and with a mechanical load to be driven, operational efficiency of the combustion engine being better when power produced by the combustion engine is on a pre-determined power range than when the power produced by the combustion engine is above the predetermined power range, a storage circuit for storing electrical energy, an electronic power converter for transferring electrical energy between the storage circuit and the electrical machine, and a control system for controlling the combustion engine and the electronic power converter, wherein the control system is configured to control the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation in which i) power demand of the mechanical load is above the pre-determined power range and ii) rotational speed is increased, so as to keep the power produced by the combustion engine on the pre-determined power range, and wherein the control system is configured to reduce a fuel injection amount per each working stroke of the combustion engine during the peak-load situation so as to restrain fuel consumption of the combustion engine from increasing in response to the peak-load situation. ### Claim 2 (depends on 1) An electromechanical power transmission chain according to claim 1, wherein the control system is configured to interrupt the fuel supply of the combustion engine during the peak-load situation. ### Claim 3 (depends on 1) An electromechanical power transmission chain according to claim 1, wherein the control system is configured to limit the fuel consumption of the combustion engine to be, during the peak-load situation, substantially a same as the fuel consumption on the pre-determined power range. ### Claim 4 (depends on 1) An electromechanical power transmission chain according to claim 1, wherein the storage circuit comprises a capacitive circuit and electrical energy stored by capacitive circuit is directly proportional to a square of voltage of the capacitive circuit. ### Claim 5 (depends on 4) An electromechanical power transmission chain according to claim 4, wherein the capacitive circuit comprises an electric double layer capacitor. ### Claim 6 (depends on 4) An electromechanical power transmission chain according to claim 4, wherein the storage circuit comprises a battery element and a controllable direct voltage converter for transferring electrical energy between the capacitive circuit and the battery element. ### Claim 7 (depends on 5) An electromechanical power transmission chain according to claim 5, wherein the storage circuit comprises a battery element and a controllable direct voltage converter for transferring electrical energy between the capacitive circuit and the battery element. ### Claim 8 A working machine comprising: a combustion engine, a functional element to be driven with mechanical power, and an electromechanical power transmission chain, the electromechanical power transmission chain comprising: an electrical machine having a rotor being in a torque transfer connection with a shaft of the combustion engine and with the functional element to be driven, operational efficiency of the combustion engine being better when power produced by the combustion engine is on a pre-determined power range than when the power produced by the combustion engine is above the predetermined power range, a storage circuit for storing electrical energy, an electronic power converter for transferring electrical energy between the storage circuit and the electrical machine, and a control system for controlling the combustion engine and the electronic power converter, wherein the control system is configured to control the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation in which i) power demand of the functional element is above the pre-determined power range and ii) rotational speed is increased, so as to keep the power produced by the combustion engine on the pre-determined power range, and wherein the control system is configured to reduce a fuel injection amount per each working stroke of the combustion engine during the peak-load situation so as to restrain fuel consumption of the combustion engine from increasing in response to the peak-load situation. ### Claim 9 (depends on 8) A working machine according to claim 8, wherein the working machine comprises a hydraulic system and the functional element is a hydraulic pump of the hydraulic system. ### Claim 10 A method for controlling an electromechanical power transmission chain that comprises: an electrical machine a having a rotor in a torque transfer connection with a shaft of a combustion engine and with a mechanical load to be driven, operational efficiency of the combustion engine being better when power produced by the combustion engine is on a pre-determined power range than when the power produced by the combustion engine is above the predetermined power range, a storage circuit for storing electrical energy, and an electronic power converter for transferring electrical energy between the storage circuit and the electrical machine, the method comprising: controlling the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation in which i) power demand of the mechanical load is above the pre-determined power range and ii) rotational speed is increased, so as to keep the power produced by the combustion engine on the pre-determined power range, and limiting fuel supply of the combustion engine by reducing a fuel injection amount per each working stroke of the combustion engine during the peak-load situation so as to restrain fuel consumption of the combustion engine from increasing in response to the peak-load situation. ### Claim 11 (depends on 10) A method according to claim 10, wherein the method comprises interrupting the fuel supply of the combustion engine during the peak-load situation. ### Claim 12 (depends on 10) A method according to claim 10, wherein the method comprises limiting the fuel consumption of the combustion engine to be, during the peak-load situation, substantially a same as the fuel consumption on the pre-determined power range. ### Claim 13 A non-transitory computer readable medium encoded with a computer program for controlling an electromechanical power transmission chain that comprises: an electrical machine a having a rotor in a torque transfer connection with a shaft of a combustion engine and with a mechanical load to be driven, operational efficiency of the combustion engine being better when power produced by the combustion engine is on a pre-determined power range than when the power produced by the combustion engine is above the predetermined power range, a storage circuit for storing electrical energy, and an electronic power converter for transferring electrical energy between the storage circuit and the electrical machine, the computer program comprising computer executable instructions for controlling a programmable processing system to: control the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation in which i) power demand of the mechanical load is above the pre-determined power range and ii) rotational speed is increased, so as to keep the power produced by the combustion engine on the pre-determined power range, and reduce a fuel injection amount per each working stroke of the combustion engine during the peak-load situation so as to restrain fuel consumption of the combustion engine from increasing in response to the peak-load situation. ### Claim 14 (depends on 13) A non-transitory computer readable medium according to claim 13, wherein the computer program comprises computer executable instructions for controlling the programmable processing system to interrupt the fuel supply of the combustion engine during the peak-load situation. ### Claim 15 (depends on 13) A non-transitory computer readable medium according to claim 13, wherein the computer program comprises computer executable instructions for controlling the programmable processing system to limit the fuel consumption of the combustion engine to be, during the peak-load situation, substantially a same as the fuel consumption on the pre-determined power range.