All eyes on the Euro 7 proposal
February 22, 2022
Here’s a summary of possible changes to emission standards for passenger cars being considered as part of Euro 7.
Here’s a summary of possible changes to emission standards for passenger cars being considered as part of Euro 7.
The US EPA has revised the fuel economy standards for model years 2023 – 2026. On average, this will require fleet averaged annual reductions of CO2 or fuel consumption by 7%. Overall, the model year 2026 CO2 emissions will be further reduced by 23% compared to the previous Safer Affordable Fuel-Efficient (SAFE) rule.
California Clean Cars 2.0 : Emission standards beyond 2025 Based on workshops held by California’s Air Resource Board (CARB) Background California has the world’s toughest gas emissions standards for light-duty vehicles. The standards phase-in to 30 mg/mi of combined non-methane organic gases (NMOG) and nitrogen oxides (NOx) by 2025. CARB is now considering tightening these and other standards even more beyond 2025, while also promoting reduced fuel consumption and electrification of the fleet. A few key takeaways follow. Non-ZEV SULEV 30 fleet and pathway to 100% EV sales by 2035 California’s Air Resource Board (CARB) is aiming for further NOx and particulate reductions from the light-duty fleet. Here’s a summary of the proposed approach, based on a workshop held on May 6th, 2021. Fleet Electrification CARB Electric Vehicle Sales Targets Goal is to achieve 100% plug-in electric sales by 2035. Move from credit driven to sales driven approach: one ZEV credit per ZEV, with 5-year credit life. PHEVs must have > 50mi all-electric range, must be able to complete US06 on all electric mode, and meet SULEV30 & zero evaporative emission standards. 20% cap on PHEVs allowed to fulfill OEM obligation to ZEV requirements. As input to cost modeling, it
How is vehicle fuel economy (mpg) measured in the US ? Ever wonder how those city / highway MPG (miles per gallon) numbers on the sticker come from ? Here you go. The US EPA requires vehicle fuel consumption to be measured using lab chassis dynamometer testing. A representative vehicle is run over five test cycles, listed below along with the respective ambient temperatures: FTP-75 at 75 F: Represents city driving. Includes 3 measurements called bags (because the emissions are collected in bags !), with the first bag after a cold start (>12 hour overnight “soak”) and a hot start with engine off for only 10 min. HFET at 75 F: Highway fuel economy test US06 at 75 F: High speed and aggressive urban driving SC03 at 95 F: Represents the impact of air conditioner use at high temperatures Cold FTP at 20 F : Impact of cold ambient temperatures The above tests measure the fuel consumption over a wide range of driving conditions and provide a realistic assessment of on-road performance to the consumer. Note that till a few years back, only two cycles were used to measure the fuel economy: FTP-75 and HFET. Miles per gallon numbers from
