GB/T 19233-2020Measurement methods of fuel consumption for light-duty vehicles (English PDF)

5.1 Environmental Requirements and Parameters

The laboratory environment shall comply with the requirements of C.1.2.2 in GB 18352.6-2016.

5.2 Test Vehicles

5.2.1 All components of the test vehicle shall satisfy the requirements for mass production. If the test vehicle differs from the mass production status, then, detailed instructions are required.

5.2.5 The other settings of the test vehicle shall comply with the requirements of C.1.2.4.2 ~ C.1.2.4.5 and C.1.2.4.7 in GB 18352.6-2016.

5.3 Test Fuel

5.3.1 The type test shall comply with the lowest reference mark recommended by the vehicle manufacturer. Reference fuel that meets the requirements of Appendix K in GB 18352.6-2016 shall be used; no additional oxygenate is allowed in the fuel.

5.3.2 When performing the calculation described in 4.5, the value of fuel parameters is as follows. […]

5.4 Test Equipment

The technical characteristics of test equipment shall comply with the stipulations of Appendix CD in GB 18352.6-2016.

Note: In the relevant quoted clauses of GB 18352.6-2016, the "environmental protection authority" refers to the "automotive fuel consumption authority"; "CO2 emission" refers to "fuel consumption" in this Standard.

6.1 Test Cycle

As described in Appendix CA in GB 18352.6-2016, test cycle includes four parts. low-speed section (Low), medium-speed section (Medium), high-speed section (High) and extra high-speed section (Extra High); or, as described in Appendix A of GB/T 38146.1-2019, includes three parts.

6.2 Road Load Measurement and Dynamometer Setting

In accordance with Appendix CC in GB 18352.6-2016, conduct road load measurement and dynamometer setting.

6.3 Pre-test cycle, Pretreatment and Extraction

In accordance with the stipulations of C.1.2.5 ~ C.1.2.7 in GB 18352.6-2016, conduct pre-test cycle, pretreatment and extraction of test vehicle.

6.4 Test Procedures

6.4.1 General requirements

In accordance with the stipulations of C.1.2.8 ~ C.1.2.14 in GB 18352.6-2016, conduct the test.

6.4.2 Application of transmission

6.5 Emission Calculation

In accordance with the stipulations of Appendix CE in GB 18352.6-2016, calculate CO2, CO and HC emissions.

8.1 Production Conformity Test and Requirements

8.1.1 General requirements

8.1.1.1 As a general rule, the content and type approval value in the test result report in Appendix E shall be used as the basis to review the production conformity guarantee measures of vehicles in terms of fuel consumption.

8.1.2 Production conformity test

8.1.2.1 The reference fuel mark number used in the production conformity test shall be the same as that in the type test.

8.1.2.2 Randomly take 3 vehicles from a batch of products, in accordance with the stipulations of Chapter 4 ~ Chapter 6, conduct the test.

8.1.3 Run-in

8.1.3.1 The test may be conducted on vehicles without any driving mileage.

8.1.3.2 At the request of the vehicle manufacturer, the test may be performed on vehicles that have travelled less than 15,000 km. under this circumstance, the running-in procedure shall be performed by the vehicle manufacturer, but no adjustments can be made to these vehicles.

8.2 Production Conformity Inspection when Vehicle Manufacturer's Statistical Data is Satisfying

8.2.1 When the minimum number of sample vehicles is 3, the stipulations of the sampling procedure are as follows. when 40% of a batch of products have production defects, the probability of passing the test is 0.95 (manufacturer's risk = 5%); when 65% of a batch of products have production defects, the probability of being accepted is 0.1 (customer's risk = 10%).

8.3 Production Conformity Inspection when Vehicle Manufacturer's Statistical Data is Dissatisfying or Unavailable

8.3.1 When the minimum number of sample vehicles is 3, the stipulations of the sampling procedure are as follows. when 40% of a batch of products have production defects, the probability of passing the test is 0.95 (manufacturer's risk = 5%); when 65% of a batch of products have production defects, the probability of being accepted is 0.1 (customer's risk = 10%).

8.3.5 Formula (12) and Formula (13) may be used to calculate the test statistical value.