| GTR No. 4 WHDC | Worldwide Heavy-Duty Vehicle Emissions Certification Procedure | Global Technical Regulations | Global Technical Regulation No. 4: Test Procedure for Compression-ignition (C.I.) Engines and Positive-ignition (P.I.) Engines Fuelled with Natural Gas (NG) or Liquefied Petroleum Gas (LPG) with regard to the Emission of Pollutants The Informal Group on Heavy-Duty Hybrids expects to deliver its final draft amendment to GTR No.4 at the January 2014 session of GRPE. This amendment would extend GTR No. 4 to include test procedures to evaluate hybrid heavy-duty vehicles. WHDC Worldwide Heavy-Duty Vehicle Emissions Certification Procedure GTR No. 4 GTR No. 4 | GTR | 4 |
| GTR No. 11 NRMM Emissions | Non-Road Mobile Machinery Emissions | Global Technical Regulations | Test procedure for compression-ignition engines to be installed in agricultural and forestry tractors and in non-road mobile machinery with regard to the emissions of pollutants by the engine NRMM Emissions Non-Road Mobile Machinery Emissions GTR No. 11 GTR No. 11 | GTR | 11 |
| Heavy-Duty Hybrid Vehicle Emissions | Heavy-Duty Hybrid Vehicle Emissions | WP.29 Regulation Development | This project, as currently envisioned, would result in an amendment to Global Technical Regulation 4: Worldwide Harmonized Heavy-Duty Emissions Certification Procedure (WHDC). This effort aims to establish an amendment to Global Technical Regulation (gtr) No. 4 (WHDC) with respect to pollutant and CO2 emissions from heavy duty hybrids. The initial focus is on a Hardware-in-the-Loop (HILS) approach, which starts from the vehicle speed pattern of the WHVC vehicle cycle and simulates powertrain and vehicle components to result in a hybrid specific engine cycle for pollutant emissions and CO2 testing and measurement, and which allows using the test cell environment, data evaluation procedures and emissions calculations specified in gtr No. 4. This effort may lead to a second phase to establish a chassis dyno test procedure, as an alternative to HILS, which would involve specifying new requirements with respect to test cell environment, data evaluation procedures and emissions calculations. The informal group developing this regulatory language expects to finalize its work in March 2013 for GRPE review the following June (setting the stage for possible WP.29 adoption in November 2013 or March 2014). Heavy-duty Hybrids (HDH) Heavy-Duty Hybrid Vehicle Emissions WP.29 Regulatory Project Heavy-duty Hybrids (HDH) | Program |