GB/T 17692-2024Measurement methods of net power for automotive engines and drive motor (English PDF)

1 Scope

GB/T 17692-2024 is the Chinese national standard on measurement methods of net power for automotive engines and drive motor, in the field of road vehicles engineering. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 29 June 2024 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 January 2025. Classification: ICS 43.060.01, CCS T 11. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This document describes the method for conducting net power test and maximum 30 min power test of drive motor systems for engines and drive motor systems for M and N category vehicles, based on the net power versus speed curve proposed by the manufacturer. This document applies to reciprocating piston engines (spark ignition or compression ignition) or rotary engines (spark ignition or compression ignition), but not to free piston engines. This document applies to drive motor systems.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB 17691-2018, Limits and measurement methods for emissions from diesel fueled heavy-duty vehicles (CHINA VI)

GB 18352.6-2016, Limits and measurement methods for emissions from light-duty vehicles (CHINA 6)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB 17691-2018 and GB 18352.6-2016 as well as the following apply.

3.1 net power The power measured at the corresponding speed at the engine crankshaft end (or the shaft end of the drive motor system) or its equivalent end on the test bench according to the prescribed test method.

3.2 maximum 30 min power The average value of the maximum net power continuously output by the drive motor system within 30 minutes according to the specified test method.

3.3 drive motor system A system installed on electric vehicle to provide driving force for the vehicle and realize the mutual conversion between mechanical energy and electrical energy.

3.4 hybrid electric vehicle A vehicle capable of obtaining power from at least two of the following types of on- board stored energy devices.

3.5 dual-fuel engine An engine that can be fueled by diesel and one other fuel at the same time.

3.6 dual-fuel model A normal operation mode under which the dual-fuel engine uses diesel and one other fuel simultaneously, under certain operating conditions.