QC/T 793-2020 English PDF (QCT793-2020)

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QC/T 793-2020: Air filter for motorcycles and mopeds
QC/T 793-2020
QC
AUTOMOTIVE INDUSTRY STANDARD
ICS 43.140
T 13
Replacing QC/T 793-2007
Air filter for motorcycles and mopeds
ISSUED ON. AUGUST 31, 2020
IMPLEMENTED ON. JANUARY 01, 2021
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 5
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 7
4 Parameter names, symbols, units... 10
5 Requirements... 10
6 Test methods... 13
7 Inspection rules... 16
8 Marking, packaging, transportation, storage... 17
Appendix A (Normative) Calculation formula for rated air volume flow... 19
Appendix B (Normative) Test device... 20
Air filter for motorcycles and mopeds
1 Scope
This document specifies the requirements, test methods, inspection rules and marking,
packaging, transportation, storage of air filters for motorcycle and moped.
This document applies to air filters for motorcycle and moped (hereinafter referred to
as air filters), which have a rated air volume flow rate not greater than 120 m3/h. The
air filters for motorcycle which has a rated air volume flow rate of 120 m3/h or above
can also refer to this document.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB/T 19 Pictorial marking for packing, storage, transportation
GB/T 28949 Inlet air cleaning equipment for internal combustion engines and
compressors - Performance testing
GB/T 28950.1 Road vehicles and internal combustion engines - Filter vocabulary -
- Part 1.Definitions of filters and filter components
GB/T 28950.2 Road vehicles and internal combustion engines - Filter vocabulary -
- Part 2.Definitions of characteristics of filters and their components
GB/T 28957.1 Road vehicles - Test dust for filter evaluation - Part 1.Silicon dioxide
test dust
QC/T 32 Test methods of air cleaners for automobiles
QC/T 683 Motorcycle and moped engine cleanliness limits and measurement
methods
3 Terms and definitions
The terms and definitions as defined in GB/T 28950.1 and GB/T 28950.2, as well as
the following terms and definitions, apply to this document.
3.1
Air filter with dry paper element
An air filter, which uses dry filter paper as the filter element.
3.2
Air filter with paper element louvered by engine oil
An air filter, that uses filter paper with an appropriate amount of engine oil sprayed
on the surface as the filter element.
3.3
Air filter with foam plastic filter element
An air filter, which uses a foam material soaked in an appropriate amount of engine
oil as the filter element.
3.4
Rated air volume flow
The volume of air flowing through the air filter outlet per unit time under standard
atmospheric conditions specified by the user or manufacturer. It is determined based
on the actual demand measurement and calculation of the engine. See Appendix A
for the recommended calculation formula.
3.5
Resistance
When air flows through the air filter, the static pressure value measured at the
downstream pressure measuring point of the air filter under test.
3.6
Initial resistance
For a new air filter, the static pressure value as measured at the downstream pressure
measuring point at rated air volume flow.
3.7
Filtration efficiency
The ability of the test piece to filter out specific test dust according to the prescribed
test method, which is expressed as the mass percentage (%) of the dust filtered by
the test piece to the mass of the added dust.
3.8
Initial filtration efficiency
The ability of an air filter equipped with a new filter element to filter out specific
test dust according to the prescribed test method, which is expressed as the mass
percentage (%) of the filtered dust to the mass of the added dust.
3.9
Full life filtration efficiency
The filtration efficiency measured when the test termination condition is reached,
which is evaluated by the mass percentage (%) of dust filtered by the test piece
during the entire test to the dust added.
3.10
Dust holding capacity
The total amount of specific test dust filtered out by the test piece, when the test
termination condition is reached.
3.11
Inner cleanliness
The mass of impurities remaining in the air filter cavity before use.
3.12
Recovery ratio of air flow resistance
The ratio -- of the initial resistance of the assembly with a new filter element TO the
resistance after the dust holding capacity test (laboratory life test) is completed, that
is, after the filter element is cleaned, expressed as a percentage (%).
3.13
Shower load
The amount of water added per unit of effective filtration area of the filter element.
3.14
The damage pressure of the filter element shall not be less than 6 kPa.
5.2.10 Air filter/filter element's water immersion resistance
After the air filter with paper filter element is soaked in (23 ± 5) °C pure water for 4
hours, the paper pleats of the filter element shall not be damaged.
5.2.11 Recovery ratio of air flow resistance
After the air filter/filter element's dust capacity test is completed, the recovery ratio of
air flow resistance shall not be less than 80% after performing restorative treatment on
the air filter element.
5.2.12 High and low temperature resistance
After the air filter is subject to the high and low temperature resistance test, no structural
defects such as brittleness and deformation are allowed; the sealing performance of the
assembly shall meet the requirements of 5.2.6.
5.2.13 Water splash resistance of air filter/filter element
After the air filter is subject to the shower test at a shower load of 50 g/m2 per unit
effective filtration area, its filtration efficiency shall meet the requirements of 5.2.2; the
dust holding capacity shall not be less than 90% of the value specified in 5.2.4.
6 Test methods
6.1 Initial resistance test
The initial resistance test is performed in accordance with 6.3 in GB/T 28949-2012.
6.2 Initial filtration efficiency test
6.2.1 In the initial filtration efficiency test, the dust concentration is 1 g/m3, the dust
mass is 20 g.
6.2.2 The initial filtration efficiency test is performed in accordance with 5.1.4 in QC/T
32-2017.
6.3 Test of full life filtration efficiency and dust holding capacity
6.3.1 The dust concentration for the full life filtration efficiency and dust holding
capacity test is 1 g/m3.The test termination condition is that the air filter resistance
reaches the specified value of 3 kPa.
6.3.2 The test methods for full life filtration efficiency and dust holding capacity are
carried out in accordance with 5.1.6 in QC/T 32-2017.
6.4 Inner cleanliness test
The test method for inner cleanliness of wet air filters shall be implemented in
accordance with QC/T 683.The test method for inner cleanliness of dry air filters is
carried out according to 5.1.1 in QC/T 32-2017.
6.5 Sealing test
After the air filter's filtration efficiency test or dust holding capacity test, immediately
disassemble the air filter, to check and record whether there is any dust leakage in the
sealing parts inside the air filter.
6.6 Vibration resistance tes...