GB 26133-2010Limits and measurement methods for exhaust pollutants from small spark ignition engines of non-road mobile machinery (��, ��) (English PDF)

3.13 symbols, units and abbreviations

3.13.1 Test Parameters Symbol

All volumes and volumetric flow rate should be converted to 273 K (0 °C) and 101.325 kPa reference state.

Symbol Unit Definition

AT m2 cross-sectional area of the exhaust pipe

Aver Weighted average.

m3/h - volume flow

kg/h - mass flow

C1 - hydrocarbons, methane equivalent terms

The concentration of a component conc 10-6 (or% volume fraction) represented by the subscript

concc 10-6 a component concentration (or% volume fraction) of the background correction (indicated by the subscript)

concd 10-6 concentration of a component (or% volume fraction) of the dilution air (represented by the subscript)

DF - dilution factor

fa - Laboratory atmospheric factor

FFH - Fuel Coefficients for conversion of hydrogen to carbon ratio from dry concentration according to

Wet basis concentration

GAIRW kg/h intake air mass flow rate on wet basis

GAIRD kg/h dry intake air mass flow rate

GDILW kg/h Dilution air mass flow rate on wet basis

GEDFW kg/h wet basis equivalent diluted exhaust gas mass flow rate

GEXHW kg/h wet basis exhaust gas mass flow rate

GFUEL kg/h Fuel mass flow rate

GTOTW kg/h diluted exhaust gas mass flow rate on wet basis

HREF g/kg Reference value of absolute humidity

10.71 g/kg for calculation of NOx humidity correction factor

Ha g/kg Absolute humidity of the intake air

Hd g/kg Absolute humidity of the dilution air

KH - NOx humidity correction factor

Kw, a - intake of dry - wet basis correction factor

Kw, d - dilution air dry - wet basis correction factor

Kw, e - diluted exhaust dry - wet basis correction factor

Kw, r - original exhaust dry - wet basis correction factor

L% lower test speed, torque relative to the percentage of the maximum torque

Pa kPa saturation vapor pressure of the engine intake air

(GB/T 6072.1 psy = PSY test ambient)

pB kPa Total atmospheric pressure (GB/T 6072.1.

Px = PX-site total environmental pressure; Py = PY Test ambient total pressure)

Pd kPa Saturation vapor pressure of the dilution air

ps kPa Dry air pressure

PM kW Maximum measured power at the test speed (mounting accessories EB equipment and accessories)

Symbol Unit Definition

P (a) engine accessories shall be tested kW installed power absorbed

P (b) kW engine test should be removed the power absorbed by auxiliaries

P (n) kW Net power uncorrected

P (m) kW Power measured test stand

Q - dilution ratio

Ra% Relative humidity of the intake air

Rd% Relative humidity of the dilution air

Rf - FID response factor

S kW dynamometer setting value

Ta K Absolute temperature of the intake air

TD K Absolute dew point temperature

Tref K Reference temperature (of combustion air. 298 K)

VAIRD m3/h intake air volume flow rate on dry basis

VAIRW m3/h intake air volume flow rate on wet basis

VDILW m3/h dilution air volume flow rate on wet basis

VEDFW m3/h wet basis equivalent diluted exhaust gas volume flow

VEXHD m3/h exhaust gas volume flow rate on dry basis

VEXHW m3/h exhaust gas volume flow rate on wet basis

VTOTW m3/h diluted exhaust gas volume flow rate on wet basis

WF - weighting factor

WFE - Effective weighting factor

[Wet] - wet basis

[Dry] - dry

3.13.2 chemical component symbol

CO carbon monoxide

CO2 carbon dioxide

HC Hydrocarbons

NMHC Non-methane hydrocarbon

NOx nitrogen oxides

NO NO

Nitrogen dioxide NO2

O2 oxygen

C2H6 ethane

CH4 methane

C3H8 Propane

H2O Water

PTFE Teflon

3.13.3 Acronym

FID flame ionization detector

HFID Heated flame ionization detector

NDIR non-dispersive Infrared Analyzer

CLD chemiluminescence detector

HCLD Heated chemiluminescent detector

PDP positive displacement pump

CFV critical flow venturi

Application and approval of the type approval of 4

4.1 application for type approval

4.1.1 engine type approval application by the manufacturer or manufacturer's authorized representative submitted to the type approval mechanism. Should be the standard

Appendix A claim submitted for type approval of relevant technical information.

4.1.2 This standard should be required to submit Appendix F of production consistency guaranteeing plan.

4.1.3 type approval mechanism should be required to submit a complete engine test the contents of this standard to the designated inspection agency, which launched

Machine shall conform to the model (or the source machine) 9.1 and Appendix A of the features described.

4.1.4 If the agency believes that the type approval, the applicant to declare the source machine can not fully represent the engine family defined in Annex AB, manufacturing

The company should provide another source machine, in accordance with the requirements of this standard 4.1.3 resubmit the application for type approval.

4.2 pattern approval

4.2.1 Type approval mechanism to meet the requirements of this standard engine type or engine family shall be approved by the type approval, and presented in Appendix E

Type approval certificate provisions.

4.2.2 source machine type approval can be extended to an engine family in all models.

5.1 General Requirements

5.1.1 affect engine emissions component design, manufacturing and assembly, should ensure that the engine in normal use, no matter by what parts

Kinds of vibration, emissions should still meet the requirements of this standard.

5.1.2 The manufacturer shall take effective technical measures to ensure that the engine under normal conditions of use, in Table 4 or 5 of the engines

Lifetime, emissions shall meet the requirements of this standard.

5.2 Classification Engine

Engine category code and the corresponding working volume in Table 1.

Table 1 engine category

Engine category code working volume V/cm3

SH1 V < 20

SH2 20<=V < 50

SH3 V>=50

FSH1 V < 66

FSH2 66<=V < 100

FSH3 100<=V < 225

FSH4 V>=225

5.3 exhaust pollutant limits

5.3.1 The first stage

Engine exhaust pollutants carbon monoxide, hydrocarbons and nitrogen than oxide emissions shall not exceed the limits in Table 2.

Table 2 engine exhaust emission limits (first stage) Unit. g/(kW · h)

Engine category code

Emission limits

Carbon monoxide

(CO)

Hydrocarbons

(HC)

Nitrogen oxides

(NOx)

Hydrocarbons, nitrogen oxides

(HC NOx)

SH1 805 295 5.36 -

SH2 805 241 5.36 -

SH3 603 161 5.36 -

FSH1 519 - - 50

FSH2 519 - - 40

FSH3 519 - - 16.1

FSH4 519 - - 13.4

5.3.2 The second phase

5.3.2.1 Since the beginning of the second stage, the engine exhaust pollutants carbon monoxide, than emissions of hydrocarbons and nitrogen oxides must not exceed

Over the limits in Table 3, and the engine should meet the Tables 4 and 5 and Annex BD prescribed emission control durability requirements. Manufacturers crashed

Ming each engine family durability period applicable category. Selected category should be as close to the engine to be installed mechanical life.

Table 3 engine exhaust emission limits (second stage) Unit. g/(kW · h)

Engine category code

Emission limits

Carbon monoxide

(CO)

Hydrocarbons, nitrogen oxides

(HC NOx)

Nitrogen oxides

(NOx)

SH1 805 50

SH2 805 50

SH3 603 72

FSH1 610 50

FSH2 610 40

FSH3 610 16.1

FSH4 610 12.1

5.3.2.2 For handheld engines, manufacturers shall select Table 4 emission control durability of categories.

Table 4 handheld engine emission control durability of the Class A Units. h

Engine category code

Durability of emission control category

SH1 50 125 300

SH2 50 125 300

SH3 50 125 300

5.3.2.3 For non-handheld engines, manufacturers shall select Table 5 emission control durability of categories.

Table 5 Non-handheld engine emission control durability of the Class A Units. h

Engine category code

Durability of emission control category

FSH1 50 125 300

FSH2 125 250 500

FSH3 125 250 500

FSH4 250 500 1 000

5.3.3 snowplow for two-stroke engines, whether handheld, simply to meet the appropriate working volume of SH1, SH2 or SH3

Class engine limits.

5.3.4 For natural gas as the fuel of the engine, the option of using alternative NMHC HC.

5.4 exhaust pollutants measured

5.4.1 according to the provisions of this standard Annex BA of the engine exhaust emission test, the test loop is executed according to the provisions of B.3.5 and Table B.1.

5.4.2 engine exhaust pollutants should use this standard as described in Appendix D measurement system.

Requirements 5.5 engine installed on non-road mobile machinery

5.5.1 engine installed in non-road mobile machinery shall comply with the type approval defined range.

5.5.2 engine should meet the type approval concerns the following characteristics.

a) the engine intake pressure drop should not exceed annex AA and AC of the type approved engine predetermined maximum voltage drop.

b) the engine exhaust back pressure shall not exceed the maximum backpressure Annex AA and AC of the type approved engine regulations.

6.1 General Requirements

6.1.1 approved by the type and volume of the engine type or family, manufacturers should take measures to ensure that the engine and the corresponding

Consistent with the type approval application materials.

6.1.2 The production consistency check to the contents of the engine type or family emission type approval application materials basis.

6.1.3 The type approval according to the needs of supervision and management, according to the requirements of 6.2 Extraction prototype.

6.1.4 If an engine type or family can not meet the requirements of this standard, the manufacturer should take active measures to rectify, to ensure that students

Production consistency guarantee system effectiveness. Before the engine type or family of production consistency guarantee system has not been restored, machine type approval

Mechanism may suspend the engine type or family type approval certificate.

6.1.5 The production consistency check during emissions testing conforming GB 17930, GB 18047 GB 19159 provisions of commercially available fuel or,

Appendix C can also be used in line with the reference fuel requirements in manufacturing enterprises.

Appendix F 6.1.6 shall take measures to ensure conformity of production.

6.2 Conformity of Production Method

6.2.1 From the mass of the engine randomly selected a prototype. Manufacturers shall not be used to check the engine after sampling any

Adjustment, but it can be run-in in accordance with the technical specifications of the manufacturer. Emissions test engine shall meet the requirements of this standard.

6.2.2 If the product extracted from the bulk of an engine can not meet this standard, manufacturers may require pumping from batch products

Take several engine production consistency check. Sampling prototype manufacturer shall determine the number of n (including the original sampling that Taiwan). except

Other than that of the original sampling engine, the rest of the engine should be tested. Then, according to the n sampling prototype measured every dirty

Pollutants emissions calculated arithmetic mean value (x). If they meet the following conditions, the consistency of the batch production can be judged to be acceptable,

Otherwise unqualified.

Where. S-- standard deviation,

()

xx

= -

n-- engine number;

Li-- Tables 2 and 3 as specified emission limits;

k-- prototype based on sampling number n determined by statistical factors, the value shown in Table 6;

xi - The results of the first i n prototype station;

x --n prototype test results of the arithmetic mean.

Table 6 Statistical factor

n 2 3 4 5 6 7 8 9 10

...

END: Draft Version (GB 26133-2010)