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QC/T 239-2015英文版

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QC/T 239-2015 英文版 300 购买全文 现货, 9秒内下载 商用车辆行车制动器技术要求及台架试验方法 QCT 239-2015
标准编号: QC/T 239-2015 (QC/T239-2015)
中文名称: 商用车辆行车制动器技术要求及台架试验方法
英文名称: Specifications and bench test methods for commercial vehicle service brake
行业: 汽车行业标准 (推荐)
中标分类: T24
国际标准分类: 43.040.40
字数估计: 18,197
发布日期: 2015-04-30
实施日期: 2015-10-01
旧标准 (被替代): QC/T 479-1999; QC/T 239-1997
引用标准: GB/T 5620; GB/T 15089; QC/T 556
起草单位: 中国第一汽车股份有限公司技术中心
归口单位: 全国汽车标准化技术委员会
标准依据: 工业和信息化部公告(2015年第28号);行业标准备案公告2016年第3号(总第195号)
发布机构: 中华人民共和国工业和信息化部
范围: 本标准规定了商用车辆行车制动器总成的术语和定义、性能要求及台架试验方法。本标准适用于GB/T 15089规定的M2, M3和N类车辆用行车制动器总成及摩擦衬片(块)总成。0类车辆用制动器总成可参照执行。

QC/T 239-2015: 商用车辆行车制动器技术要求及台架试验方法
QC/T 239-2015 英文名称: Specifications and bench test methods for commercial vehicle service brake
中华人民共和国汽车行业标准
QC/T 239-2015
代替 QC/T 239—1997,QC/T 479—1999
中华人民共和国工业和信息化部发布
1 范围
本标准规定了商用车辆行车制动器总成的术语和定义、性能要求及台架试验方法。
本标准适用于GB/T 15089 规定的 M2、M3和N类车辆用行车制动器总成及摩擦衬片(块)总成。
O类车辆用制动器总成可参照执行。
2 规范性引用文件
下列文件对于本标准的应用是必不可少的。 凡是注日期的引用文件,仅所注日期的版本适用于
本标准。 凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本标准。
3 术语和定义
GB/T5620界定的以及下列术语和定义适用于本标准。
4 性能要求
4.1 制动器性能试验
4.1.1 第一次效能试验。
4.1.1.1 按7.1.2 试验,当制动初速度为 60km/h(对 N1类车辆应为 80km/h)时,其样品在规定制
动管路压力下的平均制动力矩值不应低于设计下限值的 80% ,当无设计下限值要求时,不应低于设
计值的72%或由供需双方协商;制动力矩稳定系数不应低于0.70。
4.1.1.2 制动初速度30km/h 相对60km/h(对风类车辆应为制动初速度50km/h 相对80km/h)的
速度稳定性的绝对值不应大于 10% ,制动力矩稳定系数不应低于0.75。
4.1 .2 第一次常温效能试验。
按 7.1.4 试验,其样品在规定制动管路压力下的平均制动力矩值,不应低于第二次效能试验中
对应制动初速度相同制动管路压力下的平均制动力矩值的75% 。
4 .1.3 第二次效能试验。
4 .1.3.1 按7.1.5 试验,当制动初速度为 60km/h(对 N1类车辆应为 80km/h)时,其样品在规定制
动管路压力下的平均制动力矩值应位于设计上、下限值范围内,当无设计上、下限值要求时,应位于
设计值的90% ~120%范围内。其制动力矩稳定系数不应低于0.80。
4 .1.3.2 其他制动初速度相对60km/h(对 N1类车辆应为80km/h)制动初速度的速度稳定性及制
动力矩稳定系数应满足表 1 的要求。
4.1.3.3 各制动初速度下的平均制动力矩随制动管路压力变化的趋势应平稳,不应出现突变现象。
4 .1.4 第一次衰退恢复试验。
4.1.4.1 按7.1.7 试验,其样品的衰退率应在-20% ~ 40%范围内,恢复差率的绝对值不应大
于20% 。
4 .1.4.2 热制动效能试验的平均制动力矩值不应低于第二次效能试验巾同等条件的60%。
4 .1 .4 .3 试验结束后,制动器应工作正常,不应产生明显的拖滞现象。
4.1 .5 第三次效能试验。
同 4.1.3 。
4.1.6 第二次衰退试验。
4 .1.6.1 按7.1.11 试验,其样品的衰退率应在-20% -60%范围内。
4.1.6.2 热制动效能试验的平均制动力矩值不应低于第三次效能试验中同等条件的40% 。
4 .1.6 .3 试验结束后,制动器应工作正常,不应产生明显的拖滞现象:制动鼓或制动盘摩擦表面应
无明显的刮伤和裂纹。
4 .1 .7 第二次常温效能试验。
样品在规定制动管路压力下的平均制动力矩值不应低于第四次效能试验中相同制动管路压力
下平均制动力矩值的75% 。
4.1.8 第四次效能试验。
同 4.1.3。
4 .1.9 制动噪声要求。
在 7.I 试验过程中,按 5.2.4 进行测量时, M2、M3和N1类车辆用样品的制动噪声应小于
80dB(A),其他类车辆用样品的制动噪声应小于85dB(A)。
4.1 .10 试后样品要求
在完成7.1 试验后,制动器应工作正常,并应满足下列要求:
a) 制动鼓或制动盘工作表面应无明显的刮痕;
b) 制动底板或制动钳应无影响制动性能的变形;
c) 摩擦衬片(衬块)表面应完整,不应出现明显的缺边、凸泡、凹坑、剥落、龟裂、刮痕、烧焦等
缺陷,允许奋轻微裂纹;
d) 摩擦衬片(衬块)与制动蹄铁(背板)应无分离现象;
e) 制动轮缸或制动钳应无渗漏现象。
4.2 制动器磨损试验
4 .2.1 磨损量要求。
4 .2.1.1 制动器摩擦衬片(衬块)和制动鼓(盘)磨损量要求由供需双方协商。
4.2.1.2 全部磨损试验结束后,摩擦衬片(衬块)和制动鼓(盘)应满足下列要求:
a) 制动鼓或制动盘工作表面应无明显的刮痕;
b) 摩擦衬片(衬块)表面应完整,不应出现明显的缺边、凸泡、凹坑、剥落、龟裂等缺陷;
c) 摩擦衬片(衬块)与蹄铁(背板)应无分离现象:
d) 摩擦衬片(衬块)表面不应出现贯通整个摩擦表面的裂纹。
4 .2.2 制动效能检查。
与磨损试验前相比,其规定制动管路压力下的平均制动力矩变化量不应超过±15% 。
5 试验相关要求
5 .1 试验设备要求
5 .1 .1 试验设备为惯性式制动器试验台(单、双轮均可),其性能指标应满足本标准各项试验要求。
5 .1 .2 试验设备的制动管路压力供给系统应满足各种制动工况对制动管路压力的要求,并保持稳
定。 制动管路压力升、降压速率应满足下列要求:
a) 气压制动器为(1.5 ±0.3)MPa/s;
b) 液压制动器为(25 ±5)MPa/s。
5 .1.3 试验设备的制动器冷却系统应使被试制动器处的风速达到 11m/s,且覆盖整个制动器总成。
5.1.4 制动管路压力、制动力矩和试验台主轴转速的控制误差不应大于±3%。转动惯量(包括试
5.1.5 试验设备应能连续记录下列参数,且测量误差应满足下列要求:
a) 制动输出力矩为± 1.5%;
b) 制动管路压力为±1.5%;
c) 试验台主轴转速为± 1.5%;
d) 制动时间为±0.01s;
e) 制动鼓(盘) 、摩擦衬片(衬块)温度,当温度低于 300℃时为±3℃,当温度高于 300℃时为± 1% 。
5.1 .6 测量制动鼓{盘)、摩擦衬片(衬块)温度的装置和热电偶应符合 QC/T 556 中的有关规定。
5.1.7 指示各参数的仪器或仪表,其精度等级不应低于 2.5 级。
5.2 其他要求
5 .2 .2 除衰退试验和另有规定外,试验冷却风速为11m/s,冷却空气的温度为室温。
5 .2 .3 除另有规定外,所有试验的制动终速度均为零。
5.2.4 制动噪声测量时,应将声级订的拾音头置于被试制动器的旋转平面内距制动器旋转轴线正
上方500mm处,拾音头应装在护风球内。
5.2.5 所有按减速度控制进行的试验,应按(13)式将制动减速度转化成试验台的制动力矩控制值。
5.2.6 制动鼓安装后的径向跳动量(在制动鼓摩擦表面宽度方向的中部测量)不应大于0.25mm,
制动盘安装后摩擦面的轴向跳动量(在制动盘有效摩擦半径处测量)不应大于0.2rnm。
6 试验准备
6.1 按QC/T 556 中的有关规定安装热电偶。
7 试验方法及条件
7.1 制动器性能试验
7.1.1 磨合前检查。
7.1.1.1 制动初速度为30km/h。
7.1.1 .2 平均制动减速度为3m/s2。
7.1.1.4 制动次数为 10 次。
7.1 .2 第一次数能试验。
7.1 .2.1 制动初温为(80 ±2)℃ 。
7 .1 .2.2 N1 类车辆的制动初速度为 50km/h、80km/h,其他类军辆的制动初速度为 30km/h、60km/h。
制动管路压力最大增量不应高于 0.2MPa(气压制动器)或2MPa(液压制动器),各制动初速度所对
应的每种制动管路压力各做一次试验。
7 .1 .2.4 记录每次试验的制动初速度、制动初温、制动最高温度、制动时间、制动管路压力和输出制
动力矩。
7.1.3 第一次磨合试验。
7 .1 .3.1 制动初温不应大于 120℃。
7.1.3.2 制动初速度为50km/h。
7 .1 .3.3 N1和 M2 类车辆的制动减速度为 3.5m/s2 ,其他类车辆的制动初速度为 3.0m/s2。
7 .1 .3.4 N1 和 M2类车辆的制动次数为 200 次,其他类车辆的制动次数为 500 次。当摩擦衬片
7 .1 .3.5 至少每20 次制动应记录一次输出制动力矩和制动管路压力。
7 .1.4 第一次常温效能试验。
7 .1.4 .1 制动初温不应大于50℃。
7 .1.4.2 N1 类车辆的制动初速度为50km/h,其他类车辆的制动初速度为30km/h。
7.1.4.3 制动管路压力同第一次效能试验。
7 .1.4.4 记录每次制动的制动初速度、制动初温、制动最高温度、制动时间、制动管路压力和输出制
动力矩。

ICS 43.040.40
T24
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing QC/T 239-1997 and QC/T 479-1999
Specifications and Bench Test Methods
for Commercial Vehicle Service Brake
ISSUED ON. APRIL 30, 2015
IMPLEMENTED ON. OCTOBER 1, 2015
Issued by Ministry of Industry and Information Technology of
the People's Republic of China
QC
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Contents
Foreword ... I
1 Scope ... 1
2 Normative References ... 1
3 Terminologies and Definitions ... 1
4 Performance Requirements ... 4
5 Relevant Requirements for Test ... 6
6 Test Preparation ... 7
7 Test Methods and Conditions ... 8
Appendix A (Normative) Evaluation Method of Braking Torque ... 14
Announcement of the Ministry of Industry and Information
Technology of the People's Republic of China in 2015No.28
The Ministry of Industry and Information Technology hereby approves 876 professional
standards (see Attachment 1 for the standard numbers, names, main contents and
implementation dates) such as "Cryogenic Pilot-operated Breathing Valve", including 286
mechanical professional standards, 17 automobile professional standards, 19 shipping
professional standards, 5 aviation professional standards, 24 chemical professional standards,
58 metallurgy professional standards, 146 non-ferrous professional standards, 16 rare earth
professional standards, 7 petrochemical professional standards, 73 light professional standards,
10 civil explosive professional standards, 77 electronic professional standards and 138
communication professional standards; 2 light professional standard amendments (see
Attachment 2) including "Gel Ink Ball Pens and Refills"; 12 non-ferrous metal professional
standard samples (see Attachment 3 for the standard sample catalogue and composition
content) including "Aluminum Alloy 6061 Spectrum Single-point Standard Sample".
Professional standard amendment and professional standard samples shall be implemented
from the issuance date.
The above mechanical professional standards were published by China Machine Press,
shipping professional standards were organized and published by China Technology Research
& Economy Development Institute, aviation professional standards were organized and
published by China Aero Polytechnology Establishment, chemical professional product
standards were published by Chemical Industry Press, metallurgy professional standards were
published by Metallurgical Industry Press, non-ferrous metal and rare earth professional
standards were published by China Standards Press, petrochemical professional standards
were published by China Petrochemical Press, light industry professional standards were
published by China Light Industry Press, chemical and non-ferrous metal engineering
construction professional standards and automobile professional standards were published by
China Planning Press, civil explosive professional standards were organized and published by
China Ordnance Industrial Standardization Research Institute, electronic professional
standards were organized and published by Electronics Standardization Institute of the
Ministry of Industry and Information Technology of the People's Republic of China,
communication professional standards were published by Posts & Telecom Press,
communication engineering construction professional standards were published by Beijing
University of Posts and Telecommunications Press.
Attachment. the numbers, names and implementation dates of 17 automobile
professional standards.
Ministry of Industry and Information Technology of the People's Republic of China
April 30, 2015
Attachment.
Numbers, Names and Implementation Dates of 17 Automobile Professional Standards
SN. Standard No. Standard name
Superseded standard
No.
Implementation
date
SN. Standard No. Standard name
Superseded standard
Implementation
date
287 QC/T 991-2015
Passenger Cars - Light Alloy
Wheels - 90°Impact Test
Procedure
2015-10-01
288 QC/T 717-2015
Road vehicle -Wheels-
Methods of Radial and Lateral
Run-out
QC/T 717-2004
ISO 16833. 2006,
MOD
2015-10-01
289 QC/T 52-2015 Refuse Collection Vehicle QC/T 52-2000 2015-10-01
290 QC/T 652-2015 Suction-type Sewer Scavenger QC/T 652-2000 2015-10-01
291 QC/T 992-2015
Vehicle
2015-10-01
292 QC/T 993-2015 Explosive Transport Vehicle 2015-10-01
293 QC/T 994-2015 Demountable Tanker Carrier 2015-10-01
294 QC/T 995-2015
Hydrostatic Drive Modular
Transporter
2015-10-01
295 QC/T 764-2015
Braking System-Simple Flare
Pipes, Tube Tapped Holes Male
Fittings and Hose End Fittings
QC/T 764-2006 2015-10-01
296 QC/T 239-2015
Specifications and Bench Test
Methods for Commercial
Vehicle Service Brake
QC/T 239-1997
2015-10-01
297 QC/T 996-2015
Specifications and Bench Test
Methods of Automobile Air
Dryer
2015-10-01
298 QC/T 997-2015
Structural Requirements of
Integral Body for Buses
299 QC/T 998-2015
The Technical Specification of
Automotive Cabin Air Filter
2015-10-01
300 QC/T 999-2015
Specification of By-pass Luboil
Filter Assembly for
Automobiles
2015-10-01
1000.1-2015
Performance Requirements and
Test Methods of Non-woven on
Automotive Filter-Part
1.Non-woven of Filters for
Passenger Compartment
2015-10-01
QC/T
1000.2-2015
Test Methods of Non-woven on
Automotive Filter-Part 2.
Non-woven of Filters for Air
2015-10-01
SN. Standard No. Standard name
Superseded standard
No.
Implementation
date
303 QC/T 1001-2015
Evaluation of Filterability of
Vehicle Oil Filter - Particle
Counting Method
2015-10-01
Foreword
This standard was drafted in accordance with the rules given in "Directives for
Standardization-Part 1. Structure and Drafting of Standards" (GB/T 1.1-2009).
This standard supersedes “Performance Requirements for Passenger Car and Wagon
"(QC/T 479-1999). This standard integrates all contents of QC/T 239-1997 and QC/T
479-1999, and compared with QC/T 239-1997 and QC/T 479-1999, it has the following main
changes.
——GB/T 15089 was adopted for vehicle classification (see Chapter 1);
——Some terminologies and definitions were supplemented (see 3.7 and 3.12);
——The performance requirements of efficiency test were modified (see 4.1.1, 4.1.3,
4.1.5 and 4.1.8; 5.2, 5.4 and 5.7 of 1997 edition);
——The evaluation requirements of stability for braking torque in efficiency test were
added (see 4.1.1, 4.1.3, 4.1.5 and 4.1.8);
4.1.4.1 and 4.1.6.1);
——The requirements of high temperature braking efficiency in fade test were added
(see 4.1.4.2 and 4.1.6.2);
——The requirements of braking efficiency after wear test were added (see 4.2.2 and
7.2.5);
——The calculation method of test inertia was modified (see 6.3; 7.1.6 of 1999 edition);
——Inspection prior to running-in was added (see 7.1.1);
——The efficiency test prior to running-in was added (the first efficiency test) (see
7.1.2);
——The initial braking speed in efficiency test was modified (see 7.1.5, 7.1.9 and 7.1.14;
7.2.2.1, 7.2.4.1 and 7.2.7.1 of 1999 edition);
——The test conditions in the first fade recover test were modified (see 7.1.7; 7.2.3 of
1999 edition);
——The test conditions of hydraulic brake in the second fade test were modified (see
7.1.11; 7.2.5.1 of 1999 edition);
——The test conditions of flexible test method in the second fade test were modified
(see 7.1.11.7; 7.2.5.19 of 1999 edition);
——The test conditions in wear test were modified (see 7.2; 7.2.8.1 of 1999 edition);
of 1999 edition).
Appendix A of this standard is normative.
This standard was proposed by and is under the jurisdiction of the National Technical
Committee of Auto Standardization (SAC/TC 114).
Chief drafting organizations of this standard. China FAW Group Corporation R&D
Center, China Automotive Engineering Research Institute Co., Ltd. and Zhejiang Asia-pacific
Mechanical & Electronic Co., Ltd.
PROFESSIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
   
相关标准:  QC/T 237-2022  QC/T 556-2023
 
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