Memorandum from the US EPA providing an overview of obstacles to US adoption of the proposed heavy-duty hybrids amendment and possible remedies to overcome these concerns. This memo addresses remaining concerns beyond those presented earlier in document HDH-16-03.

Overview of the status of work on the heavy-duty hybrids amendments to GTR No. 4 for the 18th HDH informal group session.

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

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

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).

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.

Presentation on the status of the work, including a new HILS-GTR v0.5 simulation model release, Validation Test Program 2 (VTP2) model verification and drive cycle development, the definition of rated power of hybrid system, and review of major open issues.

Presentation providing a summary of 15th HDH meeting, status of HDH validation test programs, topics for 16th HDH meeting, status of the amendment drafting group, revised project roadmap & planning, and plans for next meetings.

Review of the goals and status of the heavy-duty hybrid HILS test model validation program.

EC presentation reviewing the interest in and concern over the prospects for integrating the HDH procedures into the Euro VI legislation.

Memorandum from the US Environmental Protection Agency on the proposed addition of test procedures for heavy-duty hybrid vehicles to the global technical regulation on heavy-duty vehicle emissions and fuel consumption (WHDC) identifying “a number of open issues that are causing concern for the United States and require resolution prior to considering the Annex for adoption”.

Compressed (.zip) file.

Since the system output is different between WHTC, the test cycle for conventional vehicles, and WHVC, a compensation method has been proposed. JASIC reports on its verification of the compensation method and its impact on test results. (Revised version of the original document)

Summary of 14th HDH meeting
Status of HDH validation test programs
Topics for 15th HDH meeting
Status of drafting group
Revised roadmap & project planning
Next meetings

Since the system output is different between WHTC, the test cycle for conventional vehicles, and WHVC, a compensation method has been proposed. JASIC reports on its verification of the compensation method and its impact on test results.

HDH drafting group working document.

Presentation of the results of the validation test program 1 and status of test program 2 (Chassis dyno test program at JRC, HDH drive cycle investigation, and HILS/SILS model verification) and review of open issues for drafting the GTR text.

Japan analysis of JRC chassis dyno test results under the Validation Test Program 2.

Discussion of vehicle characteristics to be taken into account (or left out) in order to ensure an optimally harmonized set of heavy-duty vehicle test procedures for worldwide use.

Presentation concerning heavy-duty hybrids.

A word (.doc) version of the text is available here.

This report is the final report of the work done by the Universities of Technology in Chalmers, Graz and Vienna and research institute TNO performed within the research program on an emissions and CO2 test procedure for Heavy Duty Hybrids (HDH). This report specifically refers to Validation Test Program 1 (VTP1) under the contract for “Developing the Methodology for Certifying Heavy-Duty Hybrids based on HILS”.

Final report on the work performed by Institute for Internal Combustion Engines and Thermodynamics of the Graz University of Technology (TUG) to assess the Japanese HILS certification method within the research program on an emissions and CO2 test procedure for Heavy Duty Hybrids (HDH).

Overview of current US Environmental Protection Agency heavy-duty hybrid powerpack testing activites.

Update on development and validation of the new hybrid heavy-duty vehicle test cycles.

Presentation concerning the Vehicle Energy Consumption Calculation Tool (European tool for heavy-duty vehicle CO2 testing) within the context of heavy-duty hybrid testing.

Report on the examination of methods for matching integrated power values of WHTC and WHVC by using HILS

Status report presentation for the Working Party on Pollution and Energy.

Test Procedure for Fuel Consumption Rate and Exhaust Emissions of Heavy-Duty Hybrid Electric Vehicles using Hardware-in-the-Loop Simulator System (Kokujikan No. 281 of March 16, 2007).

Presentation on Environment Canada and US EPA joint program.

Status of the work towards developing a methodology for certifying heavy-duty hybrids based on “hardware in the loop simulation” (HILS).

Status of the work towards developing a methodology for certifying heavy-duty hybrids based on “hardware in the loop simulation” (HILS).

JASIC presentation on its evaluation of the Worldwide Heavy Duty Hybrid Cycle as proposed by Prof. Hausberger.

OICA contributions to the development of the heavy-duty hybrids amendment to GTR No. 4 (Worldwide Heavy-Duty Vehicle Emissions Certification Procedure).

Visits to Environment Canada (EC) and the National Research Council of Canada (NRC)
Facilities in conjunction with the Heavy Duty Hybrids informal group session 11 in Ottawa, Canada.

Invitation to register for the Heavy Duty Hybrids emissions test procedure informal working group session scheduled for 10-12 October in Ottawa, Canada.

Progress report on the effort to establish provisions for heavy-duty hybrid vehicles in GTR No. 4, prepared for presentation to the June session of the Working Party on Pollution and Energy (GRPE).

Overview of TU Graz and TNO evaluation of hardware-in-the-loop simulation methodologies covering the test cycle and vehicle related parameters, harmonisation with CO2 test methods, inclusion of power take-off, and worldwide harmonized vehicle cycle weighting factors.

Proposal from the research institutions involved in assessing and adapting hardware-in-the-loop simulation (HILS) methodologies to the evaluation of heavy-duty hybrids for the anticipated second phase work to produce a HILS tool for use in GTR 4 hybrid vehicle provisions.

Assessment of hardware-in-the-loop simulation (HILS) methodologies and proposals for enhancements (e.g. more topologies, component library, temperature signals to include cold start tests).

Work package 3: Extension of hardware-in-the-loop simulation (HILS) to non-electrical hybrids currently not
covered by Kokujikan No. 281.

Report of the informal group session held in Tokyo during March 2012. This group is working to add provisions for heavy-duty hybrid vehicles to GTR No. 4 (WHDC).

Investigation into various methods in use for evaluating heavy-duty hybrid emissions and CO2 performance.

Presentation on testing of heavy-duty hybrid vehicles on a chassis dynamometer.

Progress report and overview of the effort to develop a heavy-duty hybrid vehicle emissions test procedure based on hardware-in-the-loop simulations.

Progress report of the working group developing the emissions and CO2 test procedure for heavy-duty hybrid vehicles.

Comments and recommendations concerning the ‘extended HILS’ approach and application of the current worldwide heavy-duty vehicle emissions test cycle to hybrid vehicles.

Presentation on US EPA hybrid-engine powerpack testing, future challenges, and comparison with GTR program.

Review of the current status of work and forward plans.

Presentation of a proposal for a revised ‘Worldwide heavy-duty hybrid test cycle’.

The Vienna and Graz Technical Universities have conducted research and offered recommendations for the heavy-duty hybrid emissions regulation. Japan comments on the TU-Wien and TU-Graz proposals.

TU-Wien presentation on its work with IFA on the assessment of HILS methodology and suggestions for the GTR validation test program.

Presentation on the European Commission’s intentions for reducing CO2 emissions from heavy-duty vehicles.

Presentation from the International Council on Clean Technology reviewing various test methods in use for heavy-duty hybrids and evaluating opportunities for harmonization.