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
汽車空氣懸架高度控制閥
1 范圍
本文件規定了汽車空氣懸架高度控制閥(以下簡稱高度控制閥)的術語和定義、產品分類、臺架試驗要求和試驗方法。
本文件適用于商用車空氣懸架高度控制閥， 駕駛室高度控制閥及乘用車空氣懸架用高度控制閥參照執行。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。
GB/T 4208-2017 外殼防護等級(IP代碼)
GB/T 10125 人造氣氛腐蝕試驗鹽霧試驗
3 術語和定義
下列術語和定義適用于本文件。
3.1
中立位置 neutral position
擺桿處于零點(水平位置) 的位置。
3.2
打開角度 open angle
擺桿由中立位置擺至進氣口開始進氣時的角度。
注：單位為度(°)。
3.3
排氣角度 exhaust angle
擺桿由中立位置擺至排氣口開始排氣時的角度。
注：單位為度(°)。
3.4
空行程角 idle stroke angle
打開角度與排氣角度之和。
注：單位為度(°)。
3.5
流量特性 flow characteristic
高度控制閥出氣口的流量隨擺桿角度變化的曲線。
3.6
進氣位置 intake point
擺桿處于打開角度和進氣極限角度之間的任意位置。
3.7
排氣位置 exhaust point
擺桿處于排氣角度和排氣極限角度之間的任意位置。
3.8
最大工作角度 maximum working angle
技術文件規定的產品最大進氣(排氣)角度。
注：進氣為“+”、排氣為“-”，單位為度(°)。
3.9
額定工作壓力 rated working pressure
pE
技術文件規定的產品工作氣壓。
注：單位為千帕(kPa)。
3.10
延時時間 delay time
擺桿自中立位置向進(排)氣方向移動至進(排)氣開始時的全程時間。
注：單位為秒(s)。
4 產品分類
4.1 非延時型
延時時間小于2s的高度控制閥。
4.2 延時型
延時時間不小于2s的高度控制閥。
注：延時即打開角度及排氣角度有延時響應。
