Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard is redrafted by reference to, but is not equivalent to, ECE-R138 Uniform provisions concerning the approval of quiet road transport vehicle with regard to their reduced audibility.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee of Auto Standardization (SAC/TC 114).
Acoustic vehicle alerting system of electric vehicles running at low speed
1 Scope
This standard specifies requirements and test methods for speed range, sound pressure level limits, frequency requirement, sound type, pause switch, etc., of acoustic vehicle alerting system of electric vehicles running at low speed (hereinafter referred to as "AVAS").
It is applicable to battery electric vehicles (BEVs) of categories M1 and N1, hybrid electric vehicles (HEVs) with pure electric driving mode, and fuel cell electric vehicles (FCEVs).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB 1495 Limits and measurement methods for noise emitted by accelerating motor vehicles
GB/T 3241-2010 Electroacoustics - Octave-band and fractional-octave-band filters
GB 50800-2012 Technical code for anechoic and semi-anechoic rooms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply.
3.1
acoustic vehicle alerting system; AVAS
a system to give acoustic alert when the noise emitted by vehicle is below a certain value during running to efficiently deliver information to other road users
3.2
acoustic vehicle alerting system of electric vehicle running at low speed
acoustic alert emitted by the AVAS when the running speed of the electric vehicle is lower than a certain value
3.3
acoustic vehicle alerting system pause switch
mechanism to turn on/off the AVAS of an electric vehicle
3.4
frequency shift
variation of the frequency content of the acoustic vehicle alerting system of electric vehicles running at low speed as a function of the vehicle speed
3.5
front plane of the vehicle
vertical plane tangent to the leading edge of the vehicle
3.6
rear plane of the vehicle
vertical plane tangent to the trailing edge of the vehicle
3.7
sound pressure level; SPL
pressure level of a sound, equal to 20 × lg10 of the ratio of the Root Mean Square (RMS) of sound pressure to the reference of sound pressure
Note: Expressed in decibels (dB).
3.8
weighted sound level
sound pressure level measured by weighted network filter
3.9
total sound level
integrated parameter reflecting the strength of sound and in line with the characteristics of the human auditory system, which is obtained according to certain weighting method and covers the sound frequency range of 20Hz~20kHz
4 General requirements
4.1 Speed range for operation
The speed range for operation of the AVAS shall be at least the range of greater than 0 km/h up to and inclusive to 20km/h.
When the vehicle is stationary and in the drivable mode, the manufacturer can determine whether to turn on or turn off the acoustic vehicle alerting system running of electric vehicle running at low speed.
4.2 SPL limits
4.2.1 The exterior noise of electric vehicle measured according to the method specified in 5.6.2 shall be in all one-third octave bands of the electric vehicle, wherein at least two one-third octave bands shall not be less than the SPL specified in Table 1, and simultaneously meet the requirements of their total sound level specified in Table 1.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General Requirements 5 Test methods
ICS 43.040.20 T 35 中华人民共和国国家标准 GB/T 37153—2018 电动汽车低速提示音 Acoustic vehicle alerting system of electric vehicles running at low speed [ECE-R138，Uniform provisions concerning the approval of Quiet Road Transport Vehicles with regard to their reduced audibility(QRTV)，NEQ] 2018-12-28发布 2019-07-01实施 国家市场监督管理总局 中国国家标准化管理委员会 发布 前 言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准使用重新起草法参考ECE-R138《针对安静道路行驶车辆可听度降低的要求》编制，与ECER-138的一致性程度为非等效。 本标准由中华人民共和国工业和信息化部提出。 本标准由全国汽车标准化技术委员会(SAC/TC 114)归口。 电动汽车低速提示音 1 范围 本标准规定了电动汽车低速行驶提示音(以下简称“提示音”)工作的车速范围、声级限值、频率要求、声音类型以及暂停开关等要求和试验方法。 本标准适用于M1和N1类的纯电动汽车、具有纯电动行驶模式的混合动力电动汽车以及燃料电池电动汽车。 2 规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文 件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。 GB 1495 汽车加速行驶车外噪声限值及测量方法 GB/T 3241—2010 电声学 倍频程和分数倍频程滤波器 GB/T 3785.1—2010 电声学 声级计 第1部分：规范 GB/T 12534 汽车道路试验方法通则 GB/T 15173—2010 电声学 声校准器 GB/T 19596 电动汽车术语 GB 50800—2012 消声室和半消声室技术规范 3 术语和定义 GB/T 19596界定的以及下列术语和定义适用于本文件。 3.1 汽车提示音系统 acoustic vehicle alerting system；AVAS 在汽车行驶所发出噪声值低于一定数值时，用于发出提示声音、以有效地传递信息给其他道路使用者的系统。 3.2 电动汽车低速提示音 acoustic vehicle alerting system of electric vehicle running at low speed 电动汽车行驶车速低于一定数值时，由汽车提示音系统发出的提示声音。 3.3 提示音系统暂停开关 acoustic vehicle alerting system pause switch 电动汽车上开启/关闭提示音的装置。 3.4 频移 frequency shift 电动汽车低速行驶提示音频率随车速变化而产生的变化。 3.5 车辆前平面 front plane of the vehicle 与车辆前部边缘相切的垂直面。 3.6 车辆后平面 rear plane of the vehicle 与车辆尾部边缘相切的垂直面。 3.7 声级 sound pressure level；SPL 方均根声压与基准声压之比的以10为底的对数乘以20。 注：用分贝(dB)表示。 3.8 计权声级 weighted sound level 通过计权网络滤波器所测得的声级。 3.9 总声级 total sound level 按照一定的计权方式，最终获得的符合人体听觉系统特点的、整合的声音强弱的参数，其涵盖的声音频率范围为20Hz~20kHz。 4 一般要求 4.1 工作车速范围 提示音系统的工作车速范围应至少包含大于0 km/h且小于或等于20 km/h。 车辆静止且处于可行驶模式状态下，厂商可选择是否让低速提示音系统发声。 4.2 声级限值 4.2.1 按5.6.2中规定的测量方法测得的电动汽车车外噪声，需在其所包含的各个1/3倍频程上，其中至少两个1/3倍频程上不小于表1中所规定的声级，且同时满足表1中对其总声级的要求。 表1 最低声级限值 频率 (Hz) 电动汽车车外噪声 dB(A) 匀速向前行驶车速 匀速倒挡行驶车速 10 km/h 20 km/h 6 km/h 计权声级(总声级) 52.0 58.0 49.0 1/3倍频程 160 47.0 52.0 — 200 46.0 51.0 250 45.0 50.0 315 46.0 51.0 400 47.0 52.0 500 47.0 52.0 630 48.0 53.0 800 48.0 53.0 1000 48.0 53.0 1250 48.0 53.0
