The draft agenda was adopted.

Working paper HDH-12-03e is a joint presentation of the three institutes tasked with conducting validation test program 1.

Mr. Six started the presentation with a general overview of the progress achieved. Development of the driver models for the different approaches (WHVC and WHDHC) has been finished. Inclusion of non-electric components has been largely finalized, and the development of the thermal models will be completed within the next two weeks. From meetings with OEMs (see page 7), it was reported that a fully vehicle independent approach does not seem to be feasible, and that some OEMs considered that a SILS approach would be preferred over HILS. Most commonly used powerpack components are already included in the component library with a planetary gearbox model added recently. The component list will be checked, if vehicles for validation test program 2 are identified.

Mr. Silberholz continued with the description of the thermal models (task 1.6). Details of task 1.6 are shown on pages 9 to 17. The thermal model for the aftertreatment system (ATS) has been finished, the models for the coolant and lube oil circuit will be finished by the end of January, and the models for battery and electric motor will be finished within the next week and validated by the end of January.

Investigation into the different drive cycle options (WHVC vs. WHDHC) is an important part of validation test program 1. The results are shown on pages 18 to 34 for the serial hybrid. The two options only lead to comparable positive traction work, if the WHVC is accompanied with slopes. Even then, the power distribution over rotational speed at the wheel hub is different between the two options, as shown on page 27. Using the WHTC as basis leads to highly fluctuating torque signals that may cause ECU errors, as already indicated by Japan at the 11th HDH meeting. In order to solve the problem, curve smoothing is necessary. Curve smoothing was demonstrated to have no significant impact on the positive work (page 31) nor on the power distribution (page 32).

The major focus of Task 2 is currently the restructuring of the models, which is a prerequisite for setting up the data bus system needed for the component library. The results are shown on pages 37 to 44. The restructuring requires two types of interfaces (page 39). The physical interface is related to how different components are connected together, physically. The signal interface is related to control/sensor signals needed for the ECU. The proposed solution is the port based approach shown on pages 40 to 42. This approach allows easy interchanging of components including integration of OEM subsystems.

Mr. Hygrell (OICA) expressed OICA’s support for the validation test program 1 by giving input for the interface signal list and the component list, and to validation test program 2 by providing at least two vehicles, one serial and one parallel hybrid. He requested to accept SILS for the OEM in-house validation phase due to timing and cost issues.

USA and NL insisted that a real HILS validation must be conducted during validation test program 2. In order to not delay the validation test program, the Chairman suggested to accept the OICA proposal, but to conduct a HILS validation later during the program. OICA agreed to respond to the request as to whether it was possible to provide the modules and I/O, and if not why.

In order to not delay the validation test program, the Chairman suggested to accept the OICA proposal, but to conduct a HILS validation later during the program. This proposal was agreed by the group.

Korea
Working paper HDH-12-05e was uploaded to the HDH website, but not presented by Korea at the meeting. The secretary drew the attention to the summary slide (page 16), in which Korea indicated to adopt the HILS approach as the second step in the national fuel economy regulation.

Comments on the HDH work program
No input was received.

The original working paper HDH-12-05e was uploaded to the HDH website, but not presented at the 12th meeting. Mr. Lee (KATRI) presented a revised version at this meeting. Korea is currently investigating to replace the existing fuel economy regulation, which is based on a 60 km/h constant speed driving on a chassis dyno, with the WHVC cycle. Analysis of driving conditions showed a good correlation between typical Korean driving patterns and the WHVC. As a first step, Korea plans to introduce the WHVC chassis test into the national fuel economy regulation. As a second step, Korea intends to adopt the HILS method as an option upon completion of the gtr.

The original working paper HDH-12-05e was uploaded to the HDH website, but not presented at the 12th meeting. Mr. Lee (KATRI) presented a revised version at this meeting. Korea is currently investigating to replace the existing fuel economy regulation, which is based on a 60 km/h constant speed driving on a chassis dyno, with the WHVC cycle. Analysis of driving conditions showed a good correlation between typical Korean driving patterns and the WHVC. As a first step, Korea plans to introduce the WHVC chassis test into the national fuel economy regulation. As a second step, Korea intends to adopt the HILS method as an option upon completion of the gtr.

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

The secretary presented working paper HDH-12-06. The secretary had proposed at the 11th meeting to submit the final report at the 67th GRPE in January 2014, which consequently would delay GRPE adoption to June 2014. The updated roadmap, which is shown on page 7 and had been agreed at the 11th HDH meeting, was confirmed by the larger group of this meeting, and will be reported to GRPE 65 for approval.

The secretary suggested to hold the 15th HDH meeting during the week of 21 October 2013. The proposal was agreed. The secretary will ask the ICCT for confirmation.

The draft minutes of the 12th meeting were approved.