Emissions Regulations

United States

The United States Environmental Protection Agency (EPA) developed New Source Performance Standards (NSPS) for Stationary CI Engines to take effect in 2011. The new NSPS Regulations affect Stationary Emergency, Stationary Non-Emergency and Nonroad Mobile engines, and vary in tier requirements by engine horsepower. As part of its commitment to engaging with regulators to develop tough, fair and enforceable standards, Cummins supports and meets these new emissions standards.

Beginning January 1, 2007 all stationary and Nonroad regulations have been harmonized. Stationary Emergency generators must comply with Tier 3 requirements and are exempt from Tier 4 Interim and Tier 4 Final regulations that require after treatment.

 

U.S. EPA Nonroad emissions regulations scheduleCollapse/Expand

U.S. EPA Nonroad emissions regulations schedule chart

Notes:

  • NOx/HC/CO/PM (g/kW-hr)
  • (NOx + HC)/CO/PM(g/kW-hr)
  • Separate NOX and HC standards separated by a "/". Combined NOX and HC standards denoted in parenthesis "()"
  • [Conversion: (g/kW-hr)x0.7457 = g/bhp-hr]
  1. All standards are based upon ISO 8178 C1 8–mode test for variable–speed engines and D2 5–mode test for constant–speed engines. Transient test required beginning in 2011 for Tier 4 and Stage IIIB.
  2. U.S. smoke requirements: On–highway federal test procedure. Optional "Phase–in" and "Phase–out" standards for NOx are permitted by EPA.
  3. For U.S.Tier 4, optional 0.30 g/kW-hr PM standard for engines 37-55kW in 2008. Selecting this option allows a 1 year delay of Tier 4 Final implementation

U.S. EPA stationary emergency emissions regulations scheduleCollapse/Expand

U.S. EPA Nonroad emissions regulations schedule chart

Notes:

  • NOx/HC/CO/PM (g/kW-hr)
  • (NOx + HC)/CO/PM(g/kW-hr)
  • Separate NOX and HC standards separated by a "/". Combined NOX and HC standards denoted in parenthesis "()"
  • [Conversion: (g/kW-hr)x0.7457 = g/bhp-hr]
  1. All standards are based upon ISO 8178 C1 8–mode test for variable–speed engines and D2 5–mode test for constant–speed engines. Transient test required beginning in 2011 for Tier 4 and Stage IIIB.
  2. U.S. smoke requirements: On–highway federal test procedure. Optional "Phase–in" and "Phase–out" standards for NOx are permitted by EPA.
  3. For U.S.Tier 4, optional 0.30 g/kW-hr PM standard for engines 37-55kW in 2008. Selecting this option allows a 1 year delay of Tier 4 Final implementation

Canada

On December 7, 2011 Environment Canada published amendments to the Off-Road Compression Engine Emission Regulations made under the Canadian Environmental Protection Act. These amendments align Canada's emission regulations for Nonroad diesel engines with U.S. EPA Tier 4 (40 CFR 1039) regulations. These rules came into force on January 16, 2012 and apply to all persons manufacturing and importing these engines – whether already installed in machines or not.

Canada’s nonroad rule does not apply to the following engines:

  • Engines that are subject to the On-Road Vehicle and Engine Emission Regulations
  • Engines that are designed to be used exclusively for competition and bear a label to that effect
  • Engines that are designed to be used exclusively in underground mines and are certified by either: the Canada Centre for Mineral and Energy Technology (CANMET), or the Mine Safety and Health Administration of the U.S.
  • Engines that have a per-cylinder displacement of less than 50 cm3
  • Engines that will be used exclusively in military machines designed for combat or combat support and bear a label to that effect
  • Engines that are being exported and are accompanied by a written statement indicating that they will not be sold for use or used in Canada
  • Marine inboard engines
  • Engines that are stationary engines and bear a label to that effect
  • Engines that are used exclusively to provide electricity for small communities in remote areas and bear a label to that effect
  • Engines designed to propel aircraft, rolling