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GB/T 28046.4-2011 English PDF (GBT28046.4-2011)

GB/T 28046.4-2011 English PDF (GBT28046.4-2011)

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GB/T 28046.4-2011: Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 4: Climatic loads

This Part describes the potential climatic environmental stresses and specifies tests and requirements recommended for the systems/components at the specific mounting location on/in the vehicle. This Part applies to electric and electronic systems/components for road vehicles.
GB/T 28046.4-2011
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.10
T 36
Road Vehicles ?€? Environmental Conditions and
Testing for Electrical and Electronic Equipment ?€?
Part 4. Climatic Loads
(ISO 16750-4.2006, MOD)
ISSUED ON. OCTOBER 31, 2011
IMPLEMENTED ON. FEBRUARY 1, 2012
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
3. No action is required - Full-copy of this standard will be automatically and immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Application Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Operating Temperature Ranges ... 6
5 Tests and Requirements ... 7
6 Codes for Climatic Loads ... 19
7 Protection against Dust and Water ... 20
Annex A (Informative) Usual Tests and Requirements for Equipment Depending on the Mounting Location ... 21
Foreword
GB/T 28046, Road Vehicles ?€? Environmental Conditions and Testing for Electrical and Electronic Equipment ?€? Part 4. Climatic Loads, includes 5 parts.
-- Part 1. General;
-- Part 2. Electrical Loads;
-- Part 3. Mechanical Loads;
-- Part 4. Climatic Loads;
-- Part 5. Chemical Loads.
This Part is part 4 of GB/T 28046.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part was redrafted by modifying and adopting ISO 16750-4.2006, Road Vehicles ?€? Environmental Conditions and Testing for Electrical and Electronic Equipment ?€? Part 4. Climatic Loads.
The technical differences between this Part and ISO 16750-4.2006 and their reasons are as follows.
-- in order to maintain the correspondence and intercoordination with the serial standards, ?€?- 40??C?€? in the former 5.1.1.2.2 is replaced with Tmin (it is an obvious mistake and it has been changed into Tmin in the revision of ISO 16750-4); -- the instructions in Article 8 of the former standard have no guiding significance, so they are deleted in this Part;
-- the requirements in the column of 5.6 in Table 4 of the former text is hard to understand, so they are modified in this Part by referring to the corresponding content of the revision of ISO 16750-4.
This Part was proposed by the National Development and Reform Commission. This Part shall be under the jurisdiction of the National Technical Committee of Auto Standardization (SAC/TC 114).
The drafting organizations of this Part. China Automotive Technology and Research Center, Changsha Automotive Electrical Appliances Research Institute, Shanghai Institute of Quality Inspection and Technical Research, Dongfeng Commercial Vehicle Technical Centre, Shenzhen Hangsheng Electronics Co., Ltd., Shanghai Kostal- Huayang Automotive Electrical Systems Co., Ltd., Zhengzhou Yuebo Automobile Electric Appliance Co., Ltd, Suzhou 3ctest Electronic Co., Ltd., Beijing Zhongyuan Co., Ltd.
Road Vehicles ?€? Environmental Conditions and
Testing for Electrical and Electronic Equipment ?€?
Part 4. Climatic Loads
1 Application Scope
This Part describes the potential climatic environmental stresses and specifies tests and requirements recommended for the systems/components at the specific mounting location on/in the vehicle.
This Part applies to electric and electronic systems/components for road vehicles. 2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Part.
GB/T 2423.1, Environmental Testing ?€? Part 2. Test Methods ?€? Tests A. Cold (GB/T 2423.1 ?€? 2008, IEC 60068-2-1.2007, IDT)
GB/T 2423.2, Environmental Testing ?€? Part 2. Test Methods ?€? Tests B. Dry Heat (GB/T 2423.2 ?€? 2008, IEC 60068-2-2. 2007, IDT)
GB/T 2423.3, Environmental Testing ?€? Part 2. Testing Method ?€? Test Cab. Damp Heat, Steady State (GB/T 2423.3-2006, IEC 60068-2-78.2001, IDT)
GB/T 2423.4, Environmental Testing ?€? Part 2. Test Method ?€? Test Db. Damp Heat, Cyclic (12 h +12 h Cycle) (GB/T 2423.4-2008, IEC 60068-2-30.2005, IDT)
GB/T 2423.17, Environmental Testing ?€? Part 2. Test Method ?€? Test Ka. Salt Mist (GB/T 2423.17-2008, IEC 60068-2-11, IDT)
GB/T 2423.18, Environmental Testing ?€? Part 2. Test Methods ?€? Test Kb. Salt Mist, Cyclic (Sodium Chloride Solution) (GB/T 2423.18, IEC 60068-2-52.1996, IDT) GB/T 2423.22, Environmental Testing ?€? Part 2. Test Methods ?€? Test N. Change of Temperature (GB/T 2423.22-2002, IEC 60068-2-14.1984, IDT)
GB/T 2423.34, Environmental Testing ?€? Part 2. Test Methods ?€? Test Z/Ad. Composite Temperature/Humidity Cyclic Test (GB/T 2423.34-2005, IEC 60068-2- 38.1974, IDT)
GB/T 2423.51, Environmental Testing ?€? Part 2. Test Methods ?€? Test Ke. Flowing Mixed Gas Corrosion Test (GB/T 2423.51-2000, IEC 60068-2-60, IDT)
GB/T 28046.1, Road Vehicles ?€? Environmental Conditions and Testing for Electrical and Electronic Equipment ?€? Part 1. General (GB/T 28046.1-2011, ISO 16750- 1.2006, MOD)
GB/T 28046.2, Road Vehicles ?€? Environmental Conditions and Testing for Electrical and Electronic Equipment ?€? Part 2. Electrical Loads (GB/T 28046.2-2011, ISO 16750-2.2006, MOD)
ISO 20653, Road Vehicles ?€? Degrees of Protection (IP Code) ?€? Protection of Electrical Equipment against Foreign Objects, Water and Access
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 28046.1 apply.
4 Operating Temperature Ranges
Table 1 defines operating temperature ranges. The applicable temperature ranges shall be chosen from Table 1 and shall be given in the specification of the device under test (DUT).
duration of 24 h unless otherwise specified in the DUT specification. The operating mode of the DUT is 1.1.
5.1.1.1.3 Requirement
Functional status shall be class C as defined in GB/T 28046.1.
5.1.1.2 Operation
5.1.1.2.1 Purpose
This test simulates the exposure of the DUT to low temperatures with electrical operation, e.g. the use of the system/components at very low ambient temperature. Failure mode is electrical malfunction caused by low temperature, e.g. freezing of capacitors with liquid electrolyte.
5.1.1.2.2 Test
Perform the test according to GB/T 2423.1 cold at a temperature of Tmin for a duration of 24 h. The operating mode of the DUT is 3.2 as defined in GB/T 28046.1. 5.1.1.2.3 Requirement
The functional status shall be class A as defined in GB/T 28046.1.
5.1.2 High-temperature tests
5.1.2.1 Storage
5.1.2.1.1 Purpose
This test simulates the exposure of the DUT to high temperatures without electrical operation, e.g. during the shipment of the system/component. Failure mode is insufficient heat resistance.
5.1.2.1.2 Test
Perform the test according to GB/T 2423.2 dry heat at a temperature of 85??C for a duration of 48 h unless otherwise specified in the DUT specification. The operating mode of the DUT is 1.1.
5.1.2.1.3 Requirement
The functional status shall be class C as defined in GB/T 28046.1.
5.1.2.2 Operation
5.1.2.2.1 Purpose
This test simulates the exposure of the DUT to high temperatures with electrical 5.2.3 Requirement
The DUT shall take up its normal function at each temperature between Tmin and Tmax, i.e. the functional status shall be class A as defined in GB/T 28046.1. 5.3 Temperature cycling
5.3.1 Temperature cycle with specified change rate
5.3.1.1 Purpose
This test simulates varying temperatures with electrical operation of the DUT, e.g. during the use of the system/components at fast-changing ambient temperature. If a system/component is exposed to hot-soak temperatures (e.g. engine-mounted systems/components), an additional short temperature peak is added during the high temperature phase of the profile to ensure proper function during short temperature peaks. The electrical operation is switched off during phases of decreasing temperature to avoid electrical heat dissipation of the system/component which would inhibit reaching Tmin inside the system/component. Failure mode is electrical malfunction during temperature change.
NOTE This test is not intended to be a life test.
5.3.1.2 Test
Perform the temperature cycling according to GB/T 2423.22.
Operate the DUT electrically (functional test) after the whole device has reached Tmin for the shortest possible duration to check the correct function of the device. In addition, operate it electrically between 210 min and 410 min of the cycle (see Figure 2). Use operating mode 3.2 for the phases with electrical operation. The changes in temperature shall correspond to the specifications given in Table 2. For tests including hot-soak temperature (TmaxHS), see Figure 3 and Table 3. The long period of electrical operation is started at 20??C in order to allow possible condensation of humidity on the DUT. A permanent opera...

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