Steve Q Posted May 19, 2017 Posted May 19, 2017 Hope this info is useful :) Emissions standard Applied to new passenger car approvals from Applied to all new registrations from Euro 1 1 July 1992 31 December 1992 Euro 2 1 January 1996 1 January 1997 Euro 3 1 January 2000 1 January 2001 Euro 4 1 January 2005 1 January 2006 Euro 5 1 September 2009 1 January 2011 Euro 6 1 September 2014 1 September 2015 Euro 1 (EC93) Implementation date (new approvals): 1 July 1992 Implementation date (all new registrations): 31 December 1992 The first Europe-wide euro emissions standards were introduced in July 1992 and the regulations weren’t anywhere near as stringent as they are today. That said, the fitment of catalytic converters became compulsory on all new cars, and Euro 1 required the switch to unleaded petrol. Back then, only hydrocarbons and nitrogen oxide were tested, along with particulate matter in the case of diesel engines. Over the years, the regulations have become stricter and the limits lowered. Euro 1 emissions standards (petrol) CO: 2.72g/km HC + NOx: 0.97g/km Euro 1 emissions standards (diesel) CO: 2.72/gkm HC + NOx: 0.97g/km PM: 0.14g/km Euro 2 (EC96) Implementation date (new approvals): 1 January 1996 Implementation date (all new registrations): 1 January 1997 Euro 2 reduced the limits for carbon monoxide and the combined limit for unburned hydrocarbons and nitrogen oxide, as well as introducing different levels for petrol and diesel engines. Euro 2 emissions standards (petrol) CO: 2.2g/km HC + NOx: 0.5g/km Euro 2 emissions standards (diesel) CO: 1.0g/km HC + NOx: 0.7g/km PM: 0.08g/km Euro 3 (EC2000) Implementation date (new approvals): 1 January 2000 Implementation date (all new registrations): 1 January 2001 Euro 3 split the hydrocarbons and nitrogen oxide limits for petrol and diesel engines, as well as adding a separate nitrogen oxide limit for diesel vehicles. The warm-up period was removed from the test procedure. Euro 3 emissions standards (petrol) CO: 2.3g/km HC: 0.20g/km NOx: 0.15g/km Euro 3 emissions standards (diesel) CO: 0.64g/km HC + NOx: 0.56g/km NOx: 0.50g/km PM: 0.05g/km Euro 4 (EC2005) Implementation date (new approvals): 1 January 2005 Implementation date (all new registrations): 1 January 2006 Euro 4 emissions standards (petrol) CO: 1.0g/km HC: 0.10g/km NOx: 0.08g/km Euro 4 emissions standards (diesel) CO: 0.50g/km HC + NOx: 0.30g/km NOx: 0.25g/km PM: 0.025g/km Euro 5 Implementation date (new approvals): 1 September 2009 Implementation date (all new registrations): 1 January 2011 The big news for Euro 5 was the introduction of particulate filters (DPFs) for diesel vehicles, along with lower limits across the board. For type approvals from September 2011 and new cars from January 2013, diesel vehicles were subject to a new limit on particulate numbers. DPFs capture 99% of all particulate matter and are fitted to every new diesel car. Cars meeting Euro 5 standards emit the equivalent of one grain of sand per kilometre driven. Euro 5 emissions standards (petrol) CO: 1.0g/km HC: 0.10g/km NOx: 0.06g/km PM: 0.005g/km (direct injection only) Euro 5 emissions standards (diesel) CO: 0.50g/km HC + NOx: 0.23g/km NOx: 0.18g/km PM: 0.005g/km PM: 6.0x10 ^11/km Euro 6 Implementation date (new approvals): 1 September 2014 Implementation date (all new registrations): 1 September 2015 The sixth and current incarnation of the Euro emissions standard was introduced on all new registrations in September 2015. For diesels, the permitted level of NOx has been slashed from 0.18g/km in Euro 5 to 0.08g/km. A focus on diesel NOx was the direct result of studies connecting these emissions with respiratory problems. To meet the new targets, some carmakers have introduced Selective Catalytic Reduction (SCR), in which a liquid-reductant agent is injected through a catalyst into the exhaust of a diesel vehicle. A chemical reaction converts the nitrogen oxide into harmless water and nitrogen, which are expelled through the exhaust pipe. The alternative method of meeting Euro 6 standards is Exhaust Gas Recirculation (EGR). A portion of the exhaust gas is mixed with intake air to lower the burning temperature. The vehicle’s ECU controls the EGR in accordance with the engine load or speed. Euro 6 emissions standards (petrol) CO: 1.0g/km HC: 0.10g/km NOx: 0.06g/km PM: 0.005g/km (direct injection only) PM: 6.0x10 ^11/km (direct injection only) Euro 6 emissions standards (diesel) CO: 0.50g/km HC + NOx: 0.17g/km NOx: 0.08g/km PM: 0.005g/km PM: 6.0x10 ^11/km Information courtesy of the RAC https://www.rac.co.uk/drive/advice/know-how/euro-emissions-standards/ Cheers Steve 1
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