Green Car Congress

FEBRUARY 5, 2020

CO 2 and NO x certification test data for heavy-duty diesel engines certified from 2002 through 2019. Manufacturers continue to optimize diesel emission controls, such as DOC, DPF and SCR, in order to promote uniform catalyst coating, improve NO x conversion efficiency, reduce back pressure on the engine, and reduce thermal mass.

Emissions 291

Emissions Diesel Engine 2010 291

Green Car Congress

JUNE 11, 2019

Technologies such as cylinder deactivation (CDA), high efficiency variable geometry turbochargers with exhaust gas by-pass, and start-stop systems are only some of the commercially available fuel saving technologies that can be implemented by 2024. The cost of controlling NO x to 0.05 g/bhp-hr in 2024 and to 0.02 g/bhp-hr in 2024 and to 0.02

Standards 191

Standards Diesel 2019 Emissions 191

Green Car Congress

JUNE 16, 2011

Turbocharging and downsizing can also yield fuel consumption reductions. Downsizing is an important strategy applicable in combination with technologies that increase engine torque, such as turbocharging or supercharging. NHTSA also asked that the NRC add to its assessment technologies that have emerged since that report was prepared.

Fuel 210

Fuel Downsizing Fuel Economy Diesel 210

Green Car Congress

SEPTEMBER 21, 2009

The two agencies are continuing with their analysis, and will incorporate the upcoming National Academies update of the 2002 NAS Report, which presents technology effectiveness estimates. Cylinder deactivation: deactivates the intake and exhaust valves and prevents fuel injection into some cylinders during light-load operation.

2016 210

2016 MPG Fuel Economy EPA 210