Technology Deepdive : Opposed piston engines

Opposed piston engines are being developed as a tool to reduce CO2 and NOx emissions from heavy-duty trucks. Here’s a deeper look into this technology and recent test results.

Characterizing the in-use heavy-duty vehicle fleet

Heavy-duty vehicles cover a very wide range of applications and typical driving profiles. A one-size-fits-all approach is unlikely to work for reaching zero tailpipe emissions from this sector. Here’s a summary of the application diversity from a US viewpoint.

Summary of CARB thinking on Non-road Tier 5 regulations

Here’s a summary of California’s latest thinking on “Tier 5” tailpipe NOx emission standards for off-road construction and farming equipment.

Meeting the HD Low NOx standards – tech update part 1

This is part 1 of 2 technology updates on pathways to meet the low NOx standards for heavy-duty vehicles set by California and being considered by the EPA for nationwide implementation starting model year 2027.

Summary of EPA proposal : Heavy-Duty Clean Trucks Plan

Here’s a summary of EPA’s proposed changes to tailpipe NOx and CO2 emission standards for HD trucks in the US beyond 2027.

All eyes on the Euro 7 proposal

Here’s a summary of possible changes to emission standards for passenger cars being considered as part of Euro 7.

SuperTurbo

SuperTurbo with Turbine Bypass for Cold Start Aftertreatment Heating Upcoming regulations such as California’s Low NOx Omnibus and Euro VII will require >90% reductions in tailpipe NOx emissions from heavy-duty trucks. This is a series providing a summary of various technologies which can help meet these challenging regulations. What is a SuperTurbo? SuperTurbo is a […]

In-use NOx emissions from heavy-duty trucks and buses

In-use NOx emissions from heavy-duty trucks and buses Journal Paper Review : Real-world NOx emissions from heavy-duty diesel, natural gas, and diesel hybrid electric vehicles of different vocations on California roadways Science of the Total Environment 784 (2021) 147224   Background This is one of the largest studies in California on measurement of in-use NOx […]

California’s Heavy-Duty Low NOx Omnibus Regulation

California’s Air Resource Board (CARB) has passed what could be perhaps it’s last major regulation for reducing NOx and particulates from heavy-duty trucks and buses. The HD Low NOx “Omnibus” regulation practically touches upon every aspect of in-use emission reduction. Highlights summarized here.