European Emission Regulations



For many years, the only fuel vapor emission standard used throughout most of Europe was found in ECE R34. This was related only to fuel tank permeation. The test required to meet ECE R34 consisted of placing a partially filled fuel tank in an enclosed chamber at 40°C for 24 hours. The total weight loss could not be more than 20 grams. This is close to the permeation levels of some untreated tanks. Based upon US regulations, the European Economic Community (EEC) required vehicles to pass a SHED-type evaporative emission test. This test measured emissions from the entire vehicle while it was subjected to a diurnal (1 hour 16-30°C) and hot-soak (1 hour 23-31°C) emission. The limit value of 2 grams per vehicle cycle applies to the entire vehicle and the sum total of all hydrocarbons. More information can be found in Directive 70/220/EEC, updated versions 94/12/EC and 96/69/EC. Starting in 2000, the European Community required vehicles to meet new regulations which are known as EURO II

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