Technical Paper
CARB Off-road Low NOX Demonstration Program - Engine Calibration and Initial Test Results
2024-04-09
2024-01-2130
Off-road diesel engines remain one of the most significant contributors to the overall NOX inventory, and the California Air Resources Board (CARB) has indicated that reductions as large as 90% from current standards may be necessary to achieve air quality goals. In recognition of this, the California Air Resources Board (CARB) has funded a program aimed at demonstrating emission control technologies for off-road engines. This program builds on previous efforts to demonstrate Low NOX technologies for onroad engines. The objective is to demonstrate technologies to reduce tailpipe NOX and particulate matter (PM) emissions by 90 and 75%, respectively, from the current Tier 4 Final standards. In addition, the emission reductions are to be achieved while also demonstrating a 5 to 8.6% carbon dioxide (CO2) reduction and remaining Greenhouse Gas (GHG) neutral with respect to nitrous oxide (N2O) and methane (CH4).