GB/T 28046.3-2011 Standard Interpretation

Road vehicles Environmental conditions and tests for electrical and electronic equipment Part 3: Mechanical loads

1 Test scope:

This part applies to automotive electrical and electronic systems/components.

2 Vehicle type:

According to the vehicle type, it is mainly divided into two categories: passenger cars and commercial vehicles.

3 Vibration test:

It should be confirmed that the product belongs to the installation position, see the table below:

Vehicle type

Installation position

Test conditions

Passenger car

Test I-Engine

Sine vibration test:

Sweep rate; ≤0.5oct/min;

Test time: 22h/direction;

Test direction: X/Y/Z, three directions;

Severity level: determined by the customer based on the number of engine cylinders.

Random vibration test:

Test time: 22h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 181m/s²

Test II-Transmission

Sine vibration test:

Sweep rate; ≤0.5oct/min ;

Test time: 22h/direction;

Test direction: X/Y/Z, three directions;

Random vibration test:

Test time: 22h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 96.6m/s²

Test III-Flexible air chamber

Sine vibration test:

Sweep rate; ≤0.5oct/min;

Test time: 22h/direction;

Test direction: X/Y/Z, three directions

Test IV-Elastomer (car body)

Random vibration test:

Test time: 8h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 27 .8m/s²

Test V-Non-elastic body (wheel/wheel suspension)

Sine vibration test:

Test time: 8h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 107.3m/s²

Commercial vehicle

Test VI-Engine/transmission

Sine vibration test:

Sweep rate; ≤0.5oct/min;

Test time: 94h/direction;

Test direction: X/Y/Z, three directions;

Random vibration test:

Test time: 94h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 177m/s²

Test VII- Elastomer

Random vibration test:

Test time: 32h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value RMS: 57.9m/s²

Test VIII-Split cab

Random vibration test:

Test time: 32h/direction;

Test direction: X/Y/Z, three directions;

Total root mean square value (vertical) RMS: 21.3m/s²

Total root mean square value (vertical) RMS: 11.8m/s²

Total root mean square value (vertical) RMS: 13.1m/s²

Test IX-Non-elastic body

Random vibration test:

According to test VII

For details of sinusoidal vibration, please refer to the standard

4 The above vibration can be carried out at room temperature. If temperature cycle is applied, refer to the figure below:

Picture

Picture

5 See the table below for other test requirements:

Chapter

Test Item

Test Condition

Applicable Products

4.2.1

Mechanical Shock

(Select one of the conditions for the test)

Severity 1: 50g, 11ms, 13,000 times

Severity 2: 30g, 6ms, 100,000 times

Products on driver's door and cargo door

Severity 1: 50g, 11ms, 6,000 times

Severity 2: 30g, 6ms, 50,000 times

Products on passenger door

Severity 1: 50g, 11ms, 2,400 times

Severity 2: 30g, 6ms, 30,000 times

Products on box cover and baffle

Severity 1: 50g, 11ms, 720 times

Severity 2: 30g, 6ms, 3000 times

Products on the hood

4.2.2

50g, 6ms, 10 times/direction*6 directions

Regular products on the body

4.2.3

3000~50000m/s², <1ms, the number of times needs to be determined

Products in the transmission

4.3

Free fall

Number of DUTs: 3pcs

Each DUT falls 2 times

Drop height: 1 meter or agreed height

Each DUT falls in different axial directions, and the 2 drops are in opposite directions

All products that may fall to the ground

4.4

Appearance strength

Specific conditions are agreed upon by both parties of supply and demand

4.5

Sand and gravel impact

Specific conditions are agreed upon by both parties of supply and demand