GB/T 40711.1-2022Off-cycle technology/device energy saving effects evaluation methods for passenger cars—Part 1: Gear shift indicator (English PDF)

1 Scope

This document specifies the method to evaluate the energy saving effect of a gear shift indicator for passenger cars.

This document applies to M1 vehicles with a gear shift indicator of which the maximum design gross mass is not exceeding 3500kg.

This document applies to vehicles capable of burning gasoline or diesel, not hybrid electric vehicles.

2 Normative references

The following referenced documents are indispensable for the application 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 18352.6-2016, Limits and measurement methods for emissions from light-duty vehicles (CHINA 6)

GB/T 19233-2020, Measurement methods of fuel consumption for light-duty vehicles

GB 19578, Fuel consumption limits for passenger cars

GB 27999, Fuel consumption evaluation methods and targets for passenger cars

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB 27999 as well as the followings apply.

5 Test procedures

5.1.1 Before the test, the vehicle shall be warmed up by running at least one Global Harmonized Light Vehicle Test Cycle (WLTC) or China Passenger Vehicle Driving Condition (CLTC-P) specified in 4.3 of GB/T 19233-2020 on a chassis dynamometer.

5.1.2 Carry out the test under WLTC or CLTC-P according to the requirements of 6.1, 6.2, 6.4 and 6.5 of GB/T 19233-2020. Each group of tests consists of a continuous basic fuel consumption test and a fuel consumption test according to the operation of the gear shift indicator. It shall be completed by the same driver. Conduct 3 groups in total. Each group of tests shall keep the vehicle in a fully preheated state, otherwise it shall be preheated again in accordance with 5.1.1.

5.1.3 The basic fuel consumption test is performed according to the requirements of 6.4.2.1 in GB/T 19233-2020. And it is consistent with the certified test gear shift operation.

Note: Vehicles subjected to the fuel consumption certification test according to the shifting operation method described in 6.4.2.2 of GB/T 19233-2020 are not applicable to this document.

5.1.4 During the fuel consumption test according to the gear shift indicator operation, the driver shall perform the gear shift operation according to the gear indicated by the gear shift indicator. At the same time, the emission test results shall also meet the requirements of the Type I test limit of the corresponding emission standard of the vehicle. For a gear shift indicator with only an upshift indicator, the gear shift operation shall be carried out in accordance with the provisions of C.1.2.6.5 in GB 18352.6-2016 during the deceleration process. The gear shift operation shall be completed within 2s after the gear shift indicator indicates the gear. The shift process shall be quick and smooth.

5.1.5 According to the methods described in 7.1~7.4 of GB/T 19233-2020, respectively calculate the results of the basic fuel consumption test and the results of the fuel consumption test according to the operation of the gear shift indicator.

5.1.6 According to 5.2, respectively carry out the repeatability inspection for the results of the basic fuel consumption test and the results of the fuel consumption test according to the operation of the gear shift indicator. If it can pass the repeatability inspection, calculate the average value of the three test results as the basic fuel consumption (FC0) and the fuel consumption according to the gear shift indicator operation (FCG). If the basic fuel consumption test fails to pass the repeatability inspection, the average value of the two test results with lower fuel consumption shall be used as FC0. If the fuel consumption test according to the operation of the gear shift indicator fails the repeatability inspection, the average value of the two test results with higher fuel consumption shall be used as the FCG.