SAE J2601 Fueling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles
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Product Code:SAE J2601
Title:Fueling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles
Issuing Committee:Fuel Cell Standards Committee
Scope:SAE TIR J2601 establishes safety limits and performance requirements for gaseous hydrogen fuel dispensers. Thecriteria include maximum fuel temperature at the dispenser nozzle, the maximum fuel flow rate, the maximum rate ofpressure increase and other performance criteria based on the cooling capability of the station’s dispenser.This document establishes fueling guidelines for “non-communication fueling” in the absence of vehicle communicationand guidelines for “communication fueling” when specified information is transmitted from the vehicle and verified at thedispenser. The process by which fueling is optimized using vehicle-transmitted information is specified. This documentprovides details of the communication data transmission protocol.The mechanical connector geometry is not covered in this document. SAE J2600 defines the connector requirements forfueling vehicles operating with a nominal working pressure of 35 MPa. SAE TIR J2799 defines the mechanical connectorgeometry for fueling vehicles to 70 MPa and also provides specifications for the hardware for vehicle-to-station dispensercommunication. It is expected that SAE J2600 will be revised to include the receptacle content of SAE TIR J2799, inwhich case the resulting SAE J2600 will provide connector hardware requirements for gaseous hydrogen fueling at allworking pressures. The vehicle-to-station communication portion of SAE TIR J2799 is to be integrated into SAE TIRJ2601 in the next revision, and it is planned that the 70 MPa nozzle in SAE TIR J2799 will be replaced by SAE J2600.This document applies to light duty vehicle fueling for vehicles with storage capacity from 1 to 10 kg for 70 MPa and 1 to7.5 kg for 35 MPa. It is intended to be revised in the next two years to include separate requirements for fueling heavyduty vehicles and motorcycles, forklifts and also for residential hydrogen fueling appliances. Since there is a significantdifference between the onboard storage capacity of heavy-duty and light-duty vehicles, the performance specificationscould be different.This document applies to fueling using an average pressure ramp rate methodology which is to be verified with ahydrogen dispenser test apparatus as defined CSA HGV 4.3. This document includes provisions for optional alternativecommunications fueling protocols and is planned to be revised in the future to include specifications for additional fuelingprocesses to allow more freedom than the present document. New dispenser protocol proposals would need to beverified with data and experience demonstrating the fueling algorithm’s capability to operate within the constraints ofSection 5.SAE J2601 Issued PropDft MAR2010 Page 3 of 54It is expected that this document will be used in conjunction with the CSA HGV 4.3 Hydrogen Dispenser TemperatureCompensation Confirmation Report, which will to provide a test method and equipment specification for confirming thatthe performance of a fuel dispenser is consistent with the requirements of SAE TIR J2601.This document establishes a formal industry-wide fueling guideline that supersedes all temporary guidelines informallyestablished by non-ANSI-certified organizations, such as the vehicle manufacturer (OEM) document Fueling Specificationfor 70 MPa Compressed Hydrogen Vehicles, Version A posted on the NextEnergy website and all CaFCP FuelingProtocols. It is understood, however, that other fueling protocols that differ from the look-up table-based protocol specifiedin this document may be used when the station provider has (a) an agreement from a vehicle manufacturer that theprotocol is appropriate for a particular vehicle system, and (b) a method of identifying the particular vehicle and limiting theprotocol to that vehicle is utilized in the station design and operation. The intent is that developments be brought to theSAE TIR J2601 team to enable modification of the document to allow for a more performance based approach for futurerevisions. The current document is table-based, providing concise performance targets and dispenser performancespecifications for both communicated and non communicated fills as detailed in Sections 5 through 9.This TIR is intended to evolve over time before it is standardized. The goal is to establish a protocol guideline in the initialpublication and request industry to give feedback and improvement suggestions before standardizing within a two-yeartimeframe.
Title:Fueling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles
Issuing Committee:Fuel Cell Standards Committee
Scope:SAE TIR J2601 establishes safety limits and performance requirements for gaseous hydrogen fuel dispensers. Thecriteria include maximum fuel temperature at the dispenser nozzle, the maximum fuel flow rate, the maximum rate ofpressure increase and other performance criteria based on the cooling capability of the station’s dispenser.This document establishes fueling guidelines for “non-communication fueling” in the absence of vehicle communicationand guidelines for “communication fueling” when specified information is transmitted from the vehicle and verified at thedispenser. The process by which fueling is optimized using vehicle-transmitted information is specified. This documentprovides details of the communication data transmission protocol.The mechanical connector geometry is not covered in this document. SAE J2600 defines the connector requirements forfueling vehicles operating with a nominal working pressure of 35 MPa. SAE TIR J2799 defines the mechanical connectorgeometry for fueling vehicles to 70 MPa and also provides specifications for the hardware for vehicle-to-station dispensercommunication. It is expected that SAE J2600 will be revised to include the receptacle content of SAE TIR J2799, inwhich case the resulting SAE J2600 will provide connector hardware requirements for gaseous hydrogen fueling at allworking pressures. The vehicle-to-station communication portion of SAE TIR J2799 is to be integrated into SAE TIRJ2601 in the next revision, and it is planned that the 70 MPa nozzle in SAE TIR J2799 will be replaced by SAE J2600.This document applies to light duty vehicle fueling for vehicles with storage capacity from 1 to 10 kg for 70 MPa and 1 to7.5 kg for 35 MPa. It is intended to be revised in the next two years to include separate requirements for fueling heavyduty vehicles and motorcycles, forklifts and also for residential hydrogen fueling appliances. Since there is a significantdifference between the onboard storage capacity of heavy-duty and light-duty vehicles, the performance specificationscould be different.This document applies to fueling using an average pressure ramp rate methodology which is to be verified with ahydrogen dispenser test apparatus as defined CSA HGV 4.3. This document includes provisions for optional alternativecommunications fueling protocols and is planned to be revised in the future to include specifications for additional fuelingprocesses to allow more freedom than the present document. New dispenser protocol proposals would need to beverified with data and experience demonstrating the fueling algorithm’s capability to operate within the constraints ofSection 5.SAE J2601 Issued PropDft MAR2010 Page 3 of 54It is expected that this document will be used in conjunction with the CSA HGV 4.3 Hydrogen Dispenser TemperatureCompensation Confirmation Report, which will to provide a test method and equipment specification for confirming thatthe performance of a fuel dispenser is consistent with the requirements of SAE TIR J2601.This document establishes a formal industry-wide fueling guideline that supersedes all temporary guidelines informallyestablished by non-ANSI-certified organizations, such as the vehicle manufacturer (OEM) document Fueling Specificationfor 70 MPa Compressed Hydrogen Vehicles, Version A posted on the NextEnergy website and all CaFCP FuelingProtocols. It is understood, however, that other fueling protocols that differ from the look-up table-based protocol specifiedin this document may be used when the station provider has (a) an agreement from a vehicle manufacturer that theprotocol is appropriate for a particular vehicle system, and (b) a method of identifying the particular vehicle and limiting theprotocol to that vehicle is utilized in the station design and operation. The intent is that developments be brought to theSAE TIR J2601 team to enable modification of the document to allow for a more performance based approach for futurerevisions. The current document is table-based, providing concise performance targets and dispenser performancespecifications for both communicated and non communicated fills as detailed in Sections 5 through 9.This TIR is intended to evolve over time before it is standardized. The goal is to establish a protocol guideline in the initialpublication and request industry to give feedback and improvement suggestions before standardizing within a two-yeartimeframe.
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