SAE J2841-2010

VIP免费

Carl 2024-09-06 139 521.46KB 45 页 15星币

__________________________________________________________________________________________________________________________________________

SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is

entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”

SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.

photocopying, recording, or otherwise, without the prior written permission of SAE.

TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)

Tel: +1 724-776-4970 (outside USA)

Fax: 724-776-0790

Email: CustomerService@sae.org

SAE WEB ADDRESS: http://www.sae.org

SAE values your input. To provide feedback

on this Technical Report, please visit

http://www.sae.org/technical/standards/J2841_201009

SURFACE

VEHICLE

INFORMATION

REPORT

J2841 SEP2010

Issued 2009-03

Revised 2010-09

Superseding J2841 MAR2009

(R) Utility Factor Definitions for Plug-In Hybrid Electric Vehicles Using Travel Survey Data

RATIONALE

Describing the fuel and electrical energy usage of plug-in hybrid electric vehicles (PHEVs) is very challenging for the

reason that these values vary greatly depending upon the distance traveled between charging. Detailed test procedures

recommended for PHEVs are found within SAE J1711, this document serves to supply appropriate UF curves for the

equations in that document that weigh the charge depleting mode operation with the charge-sustaining operation

depending upon the charge-depleting mode distance measured from the test. The original issue of SAE J2841 introduced

the Utility Factor based upon a mileage-based “Fleet” analysis of the US DOT National Household Transportation Survey

data. This issue of SAE J2841 adds more options to the Utility Factor calculations by analyzing another data set from a

Georgia Tech called the “Commute Atlanta” in order to find a vehicle-weighted analysis.

1. SCOPE

This SAE Information Report establishes a set of “Utility Factor” (UF) curves and the method for generating these curves.

The UF is used when combining test results from battery charge-depleting and charge-sustaining modes of a Plug-in

Hybrid Electric Vehicle (PHEV). Although any transportation survey data set can be used, this document will define the

included UF curves by using the 2001 United States Department of Transportation (DOT) “National Household Travel

Survey” and a supplementary dataset.

1.1 Purpose

In use, the fuel and energy consumption rates of a PHEV vary depending upon the distance driven between charge

events. For PHEVs, the baseline assumption regarding any UF is that operation starts fully charged and begins in

charge-depleting mode. Eventually, the vehicle must change to a charge-sustaining mode. The vehicle miles traveled

between charge events determines how much of the driving is performed in each of the two fundamental modes. A

second assumption is that charging occurs every day after the day's driving is complete, i.e. once per day. In the absence

of PHEV driver behavior data, the two additional unknown driver behavior issues of (1) how often charging occurs during

the day (“opportunity charging”) and (2) how often a driver will forget to charge, are assumed to be equally offsetting, thus

the baseline assumes one charge per day of operation.

Given the previous assumptions, a UF describes the fraction of driving in each of the fundamental modes using a given

set of recorded in-use driving data. Driving statistics from the 2001 National Household Travel Survey and a

supplementary dataset are used as inputs to the UF creation to provide UF curves applicable to a vehicle’s charge-

depleting mode results.

Author:Gilligan-SID:9234-GUID:39203990-155.69.4.4

SAE J2841 Revised SEP2010 Page 2 of 45

2. REFERENCES

2.1 Applicable Documents

SAE 810265, Burke, A.F. and Smith, G.E., “Impacts of Use-Pattern on the Design of Electric and Hybrid Vehicles”

SAE J1711, “Recommended Practice for Measuring the Exhaust Emissions and Fuel Economy of Hybrid-Electric

Vehicles, Including Plug-in Hybrid Vehicles”

SAE J1715, “Hybrid Electric Vehicle (HEV) & Electric Vehicle (EV) Terminology”

2001 National Household Travel Survey (NHTS), U.S. Department of Transportation, website:

http://www.bts.gov/programs/national_household_travel_survey/

Commute Atlanta Study Overview, Georgia Tech. School of Civil and Environmental Engineering, website:

http://commuteatlanta.ce.gatech.edu/

Federal Register, Vol. 71 No. 248, Page 77904, December 27, 2006

3. DEFINITIONS

3.1 HYBRID ELECTRIC VEHICLE (HEV)

A road vehicle that can draw propulsion energy from both of the following sources of stored energy: (1) a consumable fuel

and (2) a rechargeable energy storage system (RESS) that is recharged by an electric motor-generator system, an

external electric energy source, or both.

3.2 PLUG-IN HYBRID-ELECTRIC VEHICLE (PHEV)

A classification describing an HEV with an energy storage system that is designed to be recharged from an external (off-

vehicle) electric energy source, typically an AC electrical power supply system.

NOTE: Equivalent to “Off-Vehicle Charge Capable HEV,” “Grid-Connected HEV,” and “Externally Chargeable HEV”

3.3 VEHICLE MILES TRAVELED (VMT)

Vehicle Miles Traveled (VMT) is the total distance traveled by a vehicle in units of miles.

3.4 UTILITY FACTOR (UF)

The UF indicates the limited utility of a particular initial operating mode - for PHEVs, the CD mode. An operating mode

with a very long range, for example, will have a very high utility and, thus, a UF that approaches 1.0. The UF is a function

of a vehicle’s charge depleting range. The UF is defined by using the assumptions that (1) the vehicle starts the day from

a routinely achieved, fully charged state and (2) the vehicle is charged to said state before every day of vehicle travel. As

will be discussed later in the document, many possible utility factors can be created and care must be exercised when

deciding which utility factor to use for a particular analysis.

3.5 FLEET UTILITY FACTOR (FUF)

The FUF is a utility factor based on the total miles traveled for a specific fleet of vehicles. This UF is created by dividing

the depleting miles by the total miles traveled. This UF is particularly useful to calculate the expected fuel and electric

energy consumption of an entire fleet of vehicles. The FUF evaluated between 0 and 400 miles is shown in Appendix B.

Author:Gilligan-SID:9234-GUID:39203990-155.69.4.4

SAE J2841 Revised SEP2010 Page 3 of 45

3.6 INDIVIDUAL UTILITY FACTOR (IUF)

An IUF (IUF) considers all vehicles equally as opposed to using daily VMT weighting which is highly weighted towards

long distance trips. This particular utility factor is analogous to the average individual response to a survey of fuel and

electric energy consumption rates for a set of vehicles. Two possible options for an IUF are the Single Day and Multiple

Day IUFs, which are differentiated by the availability of multiple survey days in the data.

3.7 SINGLE DAY INDIVIDUAL UTILITY FACTOR (SDIUF)

The SDIUF is a specific IUF created when only a single day of travel is available. For most analysis, data from a multi-

day survey is more representative for generating IUFs. This is due to the variations of a driver’s behavior not being

adequately captured using a single day travel survey.

NOTE: The 2001 NHTS survey data only includes data from a single day per household.

3.8 MULTIPLE DAY INDIVIDUAL UTILITY FACTOR (MDIUF)

The MDIUF is a specific IUF created when multiple driving days are available from a travel survey dataset. The MDIUF

better incorporates a driver’s day-to-day variation into the utility calculation. This is the recommended utility factor to use

when calculating an IUF to estimate an individual vehicle’s expected fuel economy. The MDIUF evaluated between 0 and

400 miles is shown in Appendix B.

3.9 SPECIFIC UTILITY FACTOR (SUF)

A Specific Utility Factor is a utility factor that uses a filtered subset of data to create a utility factor that represents a certain

driving style. The reasoning behind this type of UF is that certain driving styles may have different distance distributions

for daily miles traveled and thus may be analyzed with different UFs. For example, if one assumes that a certain driving

style leads to shorter daily distances, it might be useful to use a shorter distance subset of a travel survey to create a UF

curve for that driving style. Cycle-specific utility factors can be created for either FUFs or IUFs. Note: the applicability of a

particular SUF is directly related to the ability to confidently separate driving styles given the amount of information in a

particular dataset.

3.10 CITY SPECIFIC FLEET UTILITY FACTOR (CSFUF)

The CSFUF is a Specific Fleet Utility Factor created for City (Urban) driving. Two examples of a CSFUF curve can be

found in Appendix E.

3.11 HIGHWAY SPECIFIC FLEET UTILITY FACTOR (HSFUF)

The HSFUF is a Specific Fleet Utility Factor created for Highway driving. Two examples of a HSFUF curve can be found

in Appendix E.

3.12 CHARGE-DEPLETING (CD) MODE

Operating mode of a HEV in which the vehicles run by consuming only the electric energy from the mains or along with

the fuel energy simultaneously or sequentially until the CS Mode state.

3.13 CHARGE-SUSTAINING (CS) MODE

Operating mode where the HEV runs by consuming the fuel energy while sustaining the electric energy of the RESS.

3.14 CHARGE-DEPLETING RANGE (RCD)

Generally speaking, this is the distance a vehicle can travel in Charge-Depleting Mode. Several different range

calculations are possible and are specified in SAE J1711.

Author:Gilligan-SID:9234-GUID:39203990-155.69.4.4

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

摘要：

SAE J2841-2010 是美国汽车工程师学会（SAE）发布的一项关键标准，全称为《燃料电池车辆用氢气质量分析验证用气态氢取样规范》。该标准于2010年发布，旨在为燃料电池车辆中使用的氢气提供统一的取样方法与质量控制要求，确保氢气纯度符合燃料电池系统的运行安全与性能需求。标准明确了气态氢的取样点、取样设备、取样程序及分析验证流程，对于推动氢燃料电池汽车产业化发展、保障加氢站与车辆之间氢气质量的一致性具有重要指导意义。该文档适用于汽车制造商、氢气供应商、检测机构及标准制定组织，是氢能领域基础性

展开>> 收起<<

SAE J2841-2010.pdf

共45页,预览4页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

SAE J2841-2010

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: