QC/T 1203-2024 Levelling valve for automobile air suspension
1 Scope
This document specifies the terms and definitions, product classification, bench test requirements and test methods for levelling valve for automobile air suspension (hereinafter referred to as levelling valve).
This document is applicable to levelling valve for commercial vehicle air suspension, levelling valve for cab and passenger car air suspension can be implemented with reference to this document.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
neutral position
position that rod of pendulum is in the zero point (horizontal position)
3.2
open angle
angle at which the rod of pendulum swings from the neutral position to the intake port at the beginning of the intake
Note: In degrees (°).
3.3
exhaust angle
angle at which the rod of pendulum swings from the neutral position to the exhaust port at the beginning of the exhaust
Note: In degrees (°).
3.4
idle stroke angle
sum of open angle and exhaust angle
Note: In degrees (°).
3.5
flow characteristic
curve of flow rate of the air outlet of levelling valve changes with the angle of rod of pendulum
3.6
intake point
any position that the rod of pendulum is between the open angle and the intake limit angle
3.7
exhaust point
any position that the rod of pendulum is between the exhaust angle and the exhaust limit angle
3.8
maximum working angle
maximum intake (exhaust) angle of the product as specified in the technical document
Note: The intake air is "+", the exhaust air is "-", in degrees (°).
3.9
rated working pressure
pE
working pressure of the product as specified in the technical document
Note: In kilopascals (kPa).
3.10
delay time
whole time when the rod of pendulum moves from the neutral position to the inlet (exhaust) air direction to the beginning of the inlet (exhaust) air
Note: In seconds (s).
4 Product classification
4.1 Non-delay
Levelling valves with delay time less than 2s.
4.2 Delay
Levelling valves with delay time not less than 2s.
Note: Delay means that the open angle and exhaust angle have a delayed response.
Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification 5 Technical requirements 6 Test requirements 7 Test methods
QC/T 1203-2024 Levelling valve for automobile air suspension
1 Scope
This document specifies the terms and definitions, product classification, bench test requirements and test methods for levelling valve for automobile air suspension (hereinafter referred to as levelling valve).
This document is applicable to levelling valve for commercial vehicle air suspension, levelling valve for cab and passenger car air suspension can be implemented with reference to this document.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
neutral position
position that rod of pendulum is in the zero point (horizontal position)
3.2
open angle
angle at which the rod of pendulum swings from the neutral position to the intake port at the beginning of the intake
Note: In degrees (°).
3.3
exhaust angle
angle at which the rod of pendulum swings from the neutral position to the exhaust port at the beginning of the exhaust
Note: In degrees (°).
3.4
idle stroke angle
sum of open angle and exhaust angle
Note: In degrees (°).
3.5
flow characteristic
curve of flow rate of the air outlet of levelling valve changes with the angle of rod of pendulum
3.6
intake point
any position that the rod of pendulum is between the open angle and the intake limit angle
3.7
exhaust point
any position that the rod of pendulum is between the exhaust angle and the exhaust limit angle
3.8
maximum working angle
maximum intake (exhaust) angle of the product as specified in the technical document
Note: The intake air is "+", the exhaust air is "-", in degrees (°).
3.9
rated working pressure
pE
working pressure of the product as specified in the technical document
Note: In kilopascals (kPa).
3.10
delay time
whole time when the rod of pendulum moves from the neutral position to the inlet (exhaust) air direction to the beginning of the inlet (exhaust) air
Note: In seconds (s).
4 Product classification
4.1 Non-delay
Levelling valves with delay time less than 2s.
4.2 Delay
Levelling valves with delay time not less than 2s.
Note: Delay means that the open angle and exhaust angle have a delayed response.
Contents of QC/T 1203-2024
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
6 Test requirements
7 Test methods
