Zip compressed file for the amendment and related materials to enable the use of a Hardware-in-the-loop simulation (HILS) method for the certification of heavy-duty hybrid vehicles under Global Technical Regulation No. 4.

Review of Korean results using the heavy-duty hybrid vehicle mode on a chassis dynamometer per the proposed amendment to enable hybrid vehicle testing under GTR No.4

Discussion presentation from Japan towards harmonizing the provisions for testing hybrid vehicles in the kokujikan and the proposed GTR to avoid divergent interpretations.

The HILS method currently used in Japan does use a cold-start test in hybrid testing; however, GTR No. 4 will use a cold-start test. This presentation discusses Japan’s proposal for a “predicted temperature method” that inputs the temperature profile of each component in advance.

ACEA proposal for defining a hybrid key function (torque split for parallel hybrids and energy management for serial hybrids) in the configuration of HILS software in the testing heavy-duty hybrid vehicles. ACEA also proposes to exclude “micro” hybrid systems (i.e., 48-v based systems) used to supplement the internal combustion engine as a means to reduce CO₂ emissions and improve fuel efficiency. The exclusion criteria would be based upon the ratio of positive electrical power to total system power (to be defined).

Status report on research and validation programs concerning:

• HILS Model Library
• WHVC Test Cycle
• System Work Concept
• Rated Power Determination for a Hybrid Vehicle
• Family Concept-Validity of Certification
• Validation Test Phase 2 (VTP2) Validation Results−Sub-presentations of VOLVO, MAN and IVECO
• VTP2 conclusions & discussion of further actions

Decision tree for determining the powertrain family of a given vehicle under the proposed heavy-duty hybrids emissions and fuel consumption test procedures.