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QC/T 771-2017

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标准编号: QC/T 771-2017 (QC/T771-2017)
中文名称: 汽车柴油机纸质滤芯柴油细滤器总成技术条件
英文名称: (Automotive diesel engine paper filter diesel fuel filter assembly technical conditions)
行业: 汽车行业标准 (推荐)
发布日期: 2017-01-09
实施日期: 2017-07-01
旧标准 (被替代): QC/T 771-2006
标准依据: 工业和信息化部公告2017年第2号
范围: 本标准规定了汽车柴油机纸质滤芯(包含复合滤材滤芯)柴油细滤器总成(简称总成)的技术要求、试验方法和检验规则以及标志、包装、运输和贮存。

QC/T 771-2017
Specifications of diesel-fuel fine filter assembly with paper element for automotive diesels
汽车柴油机纸质滤芯柴油细滤器总成技术条件
1 范 围
本标准规定了汽车柴油机纸质滤芯(包含复合滤材滤芯)柴油细滤器总成(简称总成)的技术要
求、试验方法和检验规则以及标志、包装、运输和贮存。
本标准适用于体积流量为 15 L/min(900 L/h)以下的汽车柴油机纸质滤芯柴油细滤器总成(包
括旋装式总成、滤芯可更换式总成),对体积流量大于 L/min(900 L/h)及其他柴油机用纸质滤芯
可参照适用。
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。
GB/T 2828 逐批检验计数抽样程序及抽样表(适用于连续批的检查)
GB/T 10125-2012 人造气氛腐蚀试验盐雾试验
GB/T 28957.1-2012 道路车辆用于滤清器评定的试验粉尘第1部分:氧化硅试验灰尘
GB/T 28957.2-2012 道路车辆用于滤清器评定的试验粉尘第2部分:氧化铝试验灰尘
GB/T 14041.1-2007 液压滤芯第1部分:结构完整性验证和初始冒泡点的确定
QC/T 772-2017 汽车用柴油滤清器试验方法
HG/T 4392-2012 汽车滤清器橡胶密封件
SAE J1985-2006 燃油滤清器单次通过原始效率试验方法
3 术语和定义
QC/T 772-2017界定的以及下列术语和定义适用于本标准。
3.1
柴油细滤器 diesel-fuel fine filter
保护柴油喷射装置的最后一级柴油滤清器。
4 技 术 要 求
4.1 总 则
总成应按照经规定程序批准的产品图样和技术文件制造,其技术要求应符合本标准的规定。
4.2 性 能
4.2.1 密封性。
4.2.1.1 按 QC/T 772-2017 的 5.1 进行试验。
4.2.1.2 总成安装于试验台上,内部通人规定压力(或按试验大纲要求的压力)的干燥空气,保压时
5 min,放置(- 40 ± 2)°C环境 24 h,在实验室环境过渡 5 min,再放置(100 ± 2)°C环境中 24 h;
为一个循环,共进行 4个循环试验。检査外观有无明显变形、破裂、塑料溶胀、脱胶、锈蚀等缺陷。
4.2.12.2 满足 4.2.1 对密封性的要求,拆解柴油滤清器检查内部滤芯有无脱胶、接头连接是否可
靠,滤纸有无破裂,是否有塑料溶胀、金属锈蚀等缺陷。
4.2.13 振动疲劳。
4.2.13.1 按QC/T 772-2017的 5.9 进行试验。
4.2.13.2 总成按装车(机)方式安装,经规定的振动参数进行振动疲劳试验后,不允许出现永久性
变形、开裂,密封连接处泄漏,密封圈鼓胀变形等缺陷。
4.2.13.3 总成试验前应按 QC/T 772-2017 的 5.1进行密封性试验并确认符合 4.2.1 的要求后进
行振动疲劳试验,试验后应复查密封性是否符合要求,并满足 4.2.13.2的规定。
4.2.13.4 总成试验前内部装有试验油并保持油压为(34.5±0.l)kPa,试验过程及结束后检查其是
否有试验油泄漏或油压降低,并满足 4.2.13.2 的规定。
4.2.14 密封圈材料。
4.2.14.1 总成的密封圈应采用耐柴油的弹性材料制造。
4.2.14.2 总成的密封圈的性能符合 HG/T 4392-2012的性能要求。
4.2.15 防镑处理。
4.2.15.1 总成中所有钢质材料制成的零件应经防镑处理。
4.2.15.2 按 GB/T 10125-2012的规定,通过中性盐雾试验100 h为合格。
4.3 外观
4.3.1 总成及滤芯的外观质量检测采用目测进行,除另有规定外。
4.3.2 总成外表面应光滑、平整,不允许有折皱、碰伤、尖角、毛刺等缺陷。
4.3.3 总成表面的镀、涂层应均匀、光滑,不允许有污物、流挂、露底、剥落等缺陷。
5 检验规则
5.1 检验合格
每只产品应经质量检验部门检验合格,并附有产品合格证方能出厂。
5.2 出厂检验
5.2.1 检验项目为 4.2.1、4.3。
5.2.2 订货单位抽检产品时,按 GB/T 2828 的规定进行。抽样方案和合格质量水平 AQL 值由供
需双方商定。
5.3 型式检验
5.3.1 型式检验的选择。
有下列情况之一时,应进行型式检验:
a) 新产品的定型鉴定;
b) 正常生产后,如结构、材料、工艺有较大改变,可能影响性能时;
c) 正常生产时,每 2年应进行一次检验;
d) 出厂检验结果与最近一次型式检验结果有较大差异时;
e) 国家质量监督机构提出进行型式检验要求时。
5.3.2 型式检验的项目为第 4章规定的全部项目,总成的振动疲劳试验为可选择试验项目。
5.3.3 抽样方案由供需双方商定,但不能少于3件。
6 标志、包装、运输及贮存
6.1 产品标志和标识
每只产品上应标明以下内容:
a) 产品标识、标志、商标;
b) 产品型号、执行标准;
c) 安装使用说明,使用时间及更换周期,注意事项。
使用说明要明了扼要,标志应明晰,部位、尺寸按产品图样的规定。
6.2 产品包装、运输和贮存
6.2.1 每只产品包装前应干净,根据需要进行防镑处理。
6.2.3 产品应装入衬有防潮材料的干燥的包装箱内,并保证在正常运输中不致损伤。
产品的包装箱外表面应标明以下内容:
a) 根据产品生产、管理、销售的需要设置标识和标志,如商品条码等能提供产品信息、生产批
次、生产时间、操作者、设备等可追溯性标识;
b) 生产单位名称、地址和电话号码;
c) 产品名称、型号和执行标准;
d) 岀厂日期、数量和质量;
e) 包装箱的外形尺寸,长 X宽 X高,单位
f) “怕湿”“小心轻放”等标志。
位应保证产品在 12个月内不致镑蚀。

QC/T 771-2017
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.40
T 13
Replacing QC/T 771-2006
Specifications of Diesel-Fuel Fine Filter Assembly with
Paper Element for Automobile Diesels
汽车柴油机纸质滤芯柴油细滤器总成技术条件
ISSUED ON: JANUARY 09, 2017
IMPLEMENTED ON: JULY 01, 2017
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Announcement ... 2
Foreword ... 9
1 Scope ... 11
2 Normative References ... 11
3 Terms and Definitions ... 12
4 Technical Requirements ... 12
5 Inspection Rules ... 18
6 Marking, Packaging, Transportation and Storage ... 19
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009 Directives for
Standardization – Part 1: Structure and Drafting of Standards.
This Standard was used in conjunction with QC/T 772-2017 Test Methods of Diesel-
Fuel Filer for Automobiles.
This Standard replaced QC/T 771-2006 Specifications of Diesel-Fuel Fine Filter
Assembly with Paper Element for Automotive Diesels. Compared with QC/T 771-2006,
this Standard ha the major technical changes as follows:
--- Add the applicable range of flow from 3.5 L/min (210 L/h) to 15 L/min (900 L/h);
--- Add GB/T 14041.1-2007 Hydraulic Fluid Power - Filter Elements - Part 1:
Verification of Fabrication Integrity and Determination of the First Bubble Point
(ISO 2942: 2004 IDT) to regulate filter element integrity;
--- Modify the original filtration efficiency of the assembly according to GB/T
28957.1-2012 Road Vehicles - Test Dust for Filter Evaluation - Part 1: Silicon
Dioxide Test Dust (ISO 12103-1:1997, Road Vehicles-Test Dust for Filter
Evaluation - Part 1: Arizona Test Dust, MOD), and GB/T 28957.2-2012 Road
Vehicles - Test Dust for Filter Evaluation - Part 2: Aluminum Oxide Test Dust (ISO
12103-2:1997 IDT);
--- Add HG/T 4392-2012 Rubber Seals for Automobile Filter to regulate the
performance of rubber seals;
--- Add the original resistance value of diesel fine filters with accessories such as
manual pumps and heaters;
--- Add the diesel fine filter with gravity or inertial water separation device according
to 5.5.3 The oil-water separation efficiency Limit value in the tested free water
separation (full sample method) from the fuel in QC/T 772-2017 Test Methods of
Diesel-Fuel Filer for Automobiles;
--- Add the water separation efficiency value according to 5.5.4 tested free water
(sampling method) separation from the fuel in QC/T 772-2017 Test Methods of
Diesel-Fuel Filer for Automobiles;
--- Add the water separation efficiency value according to 5.5.5 tested emulsified
water (sampling method) separation from the fuel in QC/T 772-2017 Test
Methods of Diesel-Fuel Filer for Automobiles;
--- Add the high and low temperature resistance requirements;
Specifications of Diesel-Fuel Fine Filter Assembly with
Paper Element for Automobile Diesels
1 Scope
This Standard specifies the technical requirements, test methods and inspection rules,
as well as marking, packaging, transportation and storage of diesel-fuel fine filter
assembly (referred to as assembly) with paper filter elements (including composite
filter element) for automobile diesels.
This Standard is applicable to diesel-fuel fine filter assembly (including spin-on
assemblies and assemblies with replaceable filter element) with paper element for
automobile diesels with a volume flow rate of 15 L/min (900 L/h) or less. For the other
paper element for diesel with the flow rate of more than 15L/min (900 L/h) can refer to
this application.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
GB/T 2828 Sampling Procedures and Tables for Lot-by-Lot Inspection by
Attributes (Apply to Inspection of Successive Lots or Batches)
GB/T 10125-2012 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
GB/T 28957.1-2012 Road Vehicles - Test Dust for Filter Evaluation - Part 1: Silicon
Dioxide Test Dust
GB/T 28957.2-2012 Road Vehicles - Test Dust for Filter Evaluation - Part 2:
Aluminum Oxide Test Dust
GB/T 14041.1-2007 Hydraulic Fluid Power - Filter Elements - Part 1: Verification
of Fabrication Integrity and Determination of the First Bubble Point
HG/T 4392-2012 Rubber Seals for Automobile Filter
SAE J 1985-2006 Fuel Filter Initial Single-Pass Efficiency Test Method
3 Terms and Definitions
For the purpose of this Standard, the terms and definitions given in QC/T 772-2017
and the following apply.
3.1 Diesel-fuel fine filter
The last level of diesel filter that protects the diesel injecting device.
4 Technical Requirements
4.1 General
technical documents approved by the prescribed procedures, and its technical
requirements shall comply with the provisions of this Standard.
4.2 Performance
4.2.1 Sealing property.
4.2.1.1 Test according to 5.1 in QC/T 772-2017.
4.2.1.2 The assembly is installed on a test bench; inject the dry air of the specified
pressure (or the pressure required by the test program) inside. The holding time is at
least 1 min. The joint surface and the sealing surface of the assembly are allowed not
to be leaked (no bubbles overflow).
in Table 1.
Table 1 – Technical Requirements for Sealing Property of the Assembly
Types of diesel filters Technical requirements
Diesel filter installed before
the oil transfer pump
If the internal pressure of the assembly reaches 400Pa, the joint surface,
sealing surface and all positions of the assembly are not allowed to be
leaked (no bubbles overflow)
Diesel filter installed after the
If the internal pressure of the assembly reaches 500Pa, the joint surface,
sealing surface and all positions of the assembly are not allowed to be
leaked (no bubbles overflow)
4.2.2 Integrity of filter element
4.2.2.1 Test on the integrity of filter element shall be conducted as per GB/T 14041.1-
2007.
4.2.12.2 Meet the requirements of 4.2.1 for sealing property. Disassemble the diesel
filter to check whether the internal filter element is de-glued, whether the joint is reliable,
whether the filter paper is cracked, whether there are defects such as plastic swelling
4.2.13 Vibration fatigue.
4.2.13.1 Test according to 5.9 in QC/T 772-2017.
4.2.13.2 The assembly is installed in the way of loading (machine). After the vibration
fatigue test is performed under the prescribed vibration parameters, the following
defects are not allowed, such as permanent deformation, cracking, leakage at the seal
connection, and swelling deformation of the seal ring.
4.2.13.3 Before the assembly test, the sealing test shall be carried out in accordance
with 5.1 in QC/T 772-2017; and after confirming that it meets the requirements of 4.2.1,
the vibration fatigue test shall be performed. After the test, recheck whether the sealing
4.2.13.4 Before the assembly test, there is test oil inside it, and the maintained oil
pressure is (34.5 ± 0.1) kPa. During and after the test, check whether there is any test
oil leakage or the oil pressure is reduced, and whether conform to the provisions of
4.2.13.2.
4.2.14 Sealing ring material.
4.2.14.1 The seal ring of the assembly shall be made of a diesel-resistant elastic
material.
4.2.14.2 The performance of the seal ring of the assembly meets the performance
requirements of HG/T 4392-2012.
4.2.15.1 All parts made of steel material in the assembly shall take the anti-rust
treatment.
4.2.15.2 According to the provisions of GB/T 10125-2012, passing the neutral salt
spray test for 100h is considered qualified.
4.3 Appearance
4.3.1 The visual inspection of the assembly and filter element is performed by visual
examination, unless otherwise specified.
4.3.2 The outer surface of the assembly shall be smooth and flat, and no defects such
as wrinkles, bumps, sharp corners, burrs, etc. are allowed.
smooth; and no defects such as dirt, sagging, exposed bottom, peeling, etc. are
allowed.
5 Inspection Rules
5.1 Pass the inspection
Each product shall pass the inspection of the quality inspection department and be
attached with a product certificate before leaving the factory.
5.2 Exit-factory inspection
5.2.1 The inspection items are 4.2.1 and 4.3.
5.2.2 When the ordering organization conducts random inspection of products, it shall
the qualified quality level AQL value shall be agreed between the supplier and the
purchaser.
5.3 Type inspection
5.3.1 Selection of type inspection.
Type inspection should be carried out in one of the following cases:
a) When finalizing and identifying the new products;
b) When the major changes in structure, materials and processes may affect the
performance, after the normal production;
c) When in normal production, inspection shall be carried out every 2 years;
latest type inspection result;
e) When a national quality supervision agency requests a type inspection.
5.3.2 The items for type inspection are all items specified in Clause 4. The vibration
fatigue test of the assembly is an optional test item.
5.3.3 The sampling plan shall be agreed between the supplier and the purchaser, but
shall be no less than 3 pieces.
   
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