The Heavy Duty Hybrid (HDH) Informal Group meeting under the World Forum for Harmonization of Vehicle Regulations (WP.29) was working on international harmonization of exhaust emission test procedures for HDH from 2010 to 2014. A speed pattern of WHVC (composed of speed and power pattern, specified when creating WHTC of a conventional engine test cycle) was initiated as a harmonized test cycle. However, there were a problems such as that the power and positive work of WHVC are different from those of WHTC. Therefore, in 2013, we studied the WHVC load compensation method which can equalize the power and positive work of WHVC with those of WHTC. This paper reports the influence of the WHVC load compensation method on exhaust emission rates based on engine dynamometer tests.

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We investigated internal short circuit test methods of lithium-ion batteries for vehicles. We performed a Forced Internal Short Circuit test, Blunt Nail test and Ceramic Nail test for the purpose of comparing reproducible confirmation and events. As a result, we confirmed that there was a technical problem in each test method. It is necessary to acquire verification data to optimize internal short circuit test methods in international standards.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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