QC/T 218-2017Technical specifications for steering column combination switches of vehicles (English PDF)

3.1 Steering column switches

It is a device that is installed on the steering column of an automobile and is composed of switches that control the lights, signals, electrical appliances and other components of the automobile.

3.2 Electrical steering column switches

The combined switches whose circuit contains electronic components.

3.3 Active electrical steering column switches

An electronic combined switch containing active electronic components in the circuit. Active electronic components include, for example, analog amplifier circuits, switching power supplies, microprocessor-based controllers, etc.

4.1 General requirements

4.1.1 Product drawings and technical documents

The combined switch shall meet the requirements of this standard and be manufactured in accordance with the requirements of the product drawings and technical documents approved by the prescribed procedures.

4.1.3 Dimensions

The size of the combined switch shall conform to the specifications of the product drawings of this type.

4.2 Rated load

The rated load of the combined switch shall meet the requirements of the product technical documents.

4.4 Strength

After the strength test, the combined switch shall be able to work normally without damage to the switch structure.

4.5 Operation sound

The operating sound of each function gear of the switch shall not be greater than 65 dB(A).

4.6 Electroplating layer and chemical treatment layer

The electroplating layer and chemical treatment layer of metal parts shall comply with the relevant requirements in QC/T 625-1999.

4.8 Contact temperature rise

In the combined switch, if the rated current of a certain switch is greater than 1 A, it needs to conduct a contact temperature rise test. When the rated current is applied, the temperature rise of the contacts shall not exceed the requirements in Table 3.

4.9 Contact chattering

When the switch is in the process of switching between various gears, when the contacts are touching or disconnecting, the chattering time of the contacts shall be less than 30 ms.

4.10 Temperature resistance performance

4.10.2 High temperature resistance performance

4.10.2.1 High temperature storage performance

After the high temperature storage test of the combined switch, the appearance shall meet the requirements of 4.1.2. After returning to normal temperature, the functions, functional characteristics and voltage drop shall meet the requirements of 4.3 and 4.7.

4.13 Salt spray resistance

After the combined switch has undergone the salt spray resistance test, its appearance shall meet the requirements of 4.1.2. The functions, functional characteristics, and voltage drop shall meet the requirements of 4.3 and 4.7.

There shall be no corrosion pits on the surface after cleaning.

4.14 Dust resistance

After the combined switch is subjected to the dust resistance test, the function, functional characteristics and voltage drop shall meet the requirements of 4.3 and 4.7.

4.17 Durability

According to the working times of the combined switch specified in Table 4, after the durability test, the absolute value of the conversion force (or torque) change shall not be greater than 40% of the value before the test; the allowable voltage drop shall not be greater than 170% of the value specified in 4.7. Gears and functions shall meet the requirements of 4.3.1.

4.24 Open circuit test

The electronic combined switch shall be subjected to an open circuit test. After the test, it shall be turned on and off normally after the normal connection is restored.

4.25 Short circuit protection

4.25.1 Signal circuit

The combined switch formed by the signal circuit shall be subjected to a short-circuit protection test. After the test, it shall be turned on and off normally after the normal connection is restored.

5.1 Test conditions

5.1.1 General test conditions

The general test conditions of the combined switch are as shown in Table 6.

5.1.2 Test equipment and instruments

Unless otherwise specified, the accuracy of the equipment and instruments shall meet the requirements of Table 7.

5.3 Dimension check

Use general or special measuring tools that meet the requirements for testing.

5.8 Test of temperature rise of contact

Apply the load as specified in the dedicated product specification to the switch; connect the circuit to perform the test. Measure the temperature rise at the lead-out terminal closest to each contact. If the temperature rise value is not greater than 1 °C within 30 minutes, the temperature can be considered stable; the measured value is recorded as the test results.

5.10 Temperature resistance performance test

5.12 Cyclic damp heat resistance test

Carry out the test in accordance with the test method specified in 5.6.2.2 of GB/T 28046.4-2011.

5.13 Salt spray resistance test

Carry out the test in accordance with the test method specified in 5.5.1 of GB/T 28046.4-2011.

5.14 Dust resistance test

Install the combined switch on a special test bench; add all shields and covers, without closing the drain hole; put it into the test chamber. The dust is Arizona ash. The air mixed with dust moves for 6 s, then a pause of 15 minutes, which constitutes 1 cycle; a total of 20 cycles are done.

5.16.2 Adhesion performance test

Test the parts with identification symbols on the combined switch. At a uniform speed of 20 mm/s ~ 50 mm/s, with a spacing of 1 mm, cut the grid on the surface of the part identification symbol; then stick a tape (3M 610 model or as negotiated between the supplier and the buyer) on the cutting surface for 1 min ~ 2 min. Make the surface be torn off at an instant; then evaluate the test items.

5.17 Durability test

5.17.1 Durability test rules

For different parts of the combined switch, test according to the following methods. For one-piece switches, the same group of samples are used to perform the following tests in sequence; for split switches, the same group of samples are used for the same split switch to be tested sequentially; different split switches can be tested separately.

5.17.6 Wiper switch

Apply load specified in the product specification or other specified loads onto the switch; at a rate of 6 times/min ~ 10 times/min, carry out the test. Each full conversion cycle includes the following.

5.17.8 Scrubber switch

Apply load specified in the product specification or other specified loads onto the switch; at a rate of 6 times/min ~ 10 times/min, carry out the test. Each full conversion cycle includes the following.

6.1 Exit-factory inspection

6.1.1 The combined switch shall be inspected and qualified before leaving the factory; meanwhile it shall be accompanied by a product quality certificate or a qualified document.

6.2 Acceptance inspection

The user has the right to check and accept according to the provisions of GB/T 2828.1. This standard recommends the use of …

6.3 Type test

6.3.1 Inspection conditions

When the combined switch has one of the following conditions, type inspection shall be carried out.

6.3.2

The sampling and grouping of the type test shall be carried out in accordance with Table 9. The type test after batch or mass production is allowed to use 2 sets of products for durability test.

7.1 Marking

The marking (identification) of the combined switch shall be clear; the production batch shall meet the requirements.

7.2 Packaging

The packaging of the combined switch shall comply with the provisions of 6.2 of QC/T 413-2002.

7.4 Storage

If the combined switch meets the above transportation and packaging conditions, it shall meet the relevant standards within 1 year from the date of leaving the factory.