UN R83 — Supplement 20 to the 06 series of amendments

Paragraph 7.1. on routine end-of-production-line testing adds “as an alternative to conducting the Type 4 test as described in this Annex”. Under new paragraph 7.1.1., the manufacturer can ask to apply alternative procedures to paragraphs 7.2. to 7.4. for vehicles with a sealed fuel tank system. These procedures need the agreement of the responsible authority. When the manufacturer chooses any alternative procedure, all the details of the conformity test procedure must be recorded in the type approval documentation (para. 7.1.2.).

The pressure applied to the fuel system in paragraphs 7.2.2. and 7.3.2. is now 3.70 kPa ± 0.10 kPa. Before, it was 370 ±10 mm of H2O. At the request of the manufacturer and with approval of the responsible authority, an alternative pressure can also be applied. The alternative pressure takes into account the pressure range in use of the fuel system. After isolation of the fuel system, the pressure must not drop by more than 0.50 kPa in five minutes (para. 7.2.4.). Before, the limit was 50 mm of H2O.

Under paragraph 7.3.5., the pressure of the fuel system must now drop to less than 2.5 kPa above ambient pressure within one minute. Before, the text read “below 100 mm of H20 in not less than 30 seconds but within two minutes”. There is no longer a minimum time of 30 seconds.

New paragraph 7.2.5. lets “the function for leakage” be demonstrated by an equivalent alternative procedure. This is possible at the request of the manufacturer and in agreement with the responsible authority. The equivalent alternative procedure for venting (paragraph 7.3.6.) and the alternative purge test procedure (paragraph 7.4.4.3.) now need agreement with the responsible authority. Paragraph 7.3.6. no longer says that the manufacturer should demonstrate the specific procedure to the technical service during the type approval procedure. Before, at the request of the manufacturer, an alternative purge test procedure could be used if the Technical Service accepted it during type approval.

Paragraphs 7.5., 7.5.1., 7.5.2. and 7.6. of Annex 7 are deleted. Under paragraph 7.5., the competent authority which granted type approval could at any time check the conformity control methods of each production unit. Paragraphs 7.5.1. and 7.5.2. said that the inspector must take a sufficiently large sample from the series and may test these vehicles by paragraph 7.1. Paragraph 7.6. applied if the requirements of paragraph 7.5. were not met. The competent authority then had to make sure that all necessary steps were taken to re-establish conformity of production as rapidly as possible.