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

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

Level / Type

National · Recommended

Issue date

October 31, 2011

Implementation date

February 1, 2012

Scope

GB/T 28046.4-2011 (Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 4: Climatic loads) is available as an English-translated PDF.

GB/T 28046.4-2011 is the Chinese standard "Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 4: Climatic loads".

Its scope clause reads: 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. Its clauses include climatic loads.; application scope; terms and definitions; operating temperature ranges.

It was issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2011-10-31 and took effect on 2012-02-01.

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Document preview — GB/T 28046.4-2011

National Standard of the People's Republic of China

ICS: 43.040.10
Classification: T 36

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

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

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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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2423.1Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold

Cited by

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