Off-Road Diesel Showcase Project

Q1 What is the Showcase?
Showcase is a joint project between the ARB, AQMD, and MSRC demonstrate the viability of diesel emission control devices in a variety of off-road environments as well as to obtain new emission control systems that will be verified by the ARB prior to new off-road regulations currently under development. This project provides an opportunity for manufacturers of diesel emission control technologies to participate with fleet owners in retrofitting their engines with a diesel emission control device to reduce diesel particulate matter (PM) or diesel PM plus oxides of nitrogen (NOx). Additionally, fleet owners benefit by gaining early compliance of new emissions standards set to go into effect in 2010 at reduced or no cost to themselves. Emission control device manufactures benefit as well by recieveing attention for their products and a realworld demonstarion of their goods.
Q2 Who are stakeholders in the Showcase Project?
Stakeholders in the Showcase project include other local air pollution control districts in California, United States Environmental Protection Agency (U.S. EPA), device manufacturers, and fleet operators. Stakeholders on technical advisory committee include: CIAQC, EMA, MECA, U.S. EPA.
Q3 What is PM?
PM is a criteria air pollutant consisting of small particles with an aerodynamic diameter less than or equal to a nominal 10 microns (about 1/7 the diameter of a single human hair). Their small size allows them to make their way to the air sacs deep within the lungs where they may be deposited and result in adverse health effects . PM10 also causes visibility reduction.
Q4 What is the mission statement for the In Use Retrofit Project?
"To protect the health of Californians by retrofitting existing diesel engines in California to reduce diesel particulate emissions to near zero, in the shortest time possible."
Q5 What are the gases of concern in diesel emission?
Diesel exhaust is composed of a complex array of gasses however the main eight gases are listed below.
  • nitrous oxide
  • nitrogen dioxide
  • formaldehyde
  • benzene
  • sulfur dioxide
  • hydrogen sulfide
  • carbon dioxide
  • carbon monoxide
Q6 What are the selected technologies implemented in the program?
Within the project there are two different technologies that could be implemented to minimize diesel emissions. These include passive and active engine retrofit technologies. Results from the exhaust temperature profile will determine which type of retrofit device to install. Considering that participation in the project is voluntary, it was determined to that the most widely accepted and economically efficient devices be utilized to retrofit the vehicles.
Q7 What is the difference between a passive and active DPF?
Passive retrofit devices can be installed on vehicles with high temperature profiles which exemplify healthy regeneration. Active DPF systems may be needed for low temperature profiles. In such cases, additional additives or fuel are required to carry forth the operations.
Regeneration Devices
  • Active: employ engine modifications, fuel injection, on-board burners or heaters, or off- board electrical heaters
  • Passive: filter regenerates in normal vehicle/equipment operation without any additional assistance
Q8 What measurement tools are utilized in the project?
Data Loggers: Installation of data loggers on the vehicles of interest were conducted by ARB technicians. These devices connect to the sensors and can be used as a source of data measurement. Temperature and exhaust pressure are recorded in engineering units and analyzed for the temperature profiles included in the discussion section.
CAN system: CAN system provides different types of message frames. The data frame transmits data by sending it from one node to various other nodes on the receiving end. This device allows the system to record additional variables including: torque, throttle position, engine load, fuel consumption, and RPM which maybe used later to analyze the data.
Q9 What are the characteristics of a diesel exhaust engine?
The diesel engine applies pressure to the air which causes it to reach high temperature and pressure. The fuel is then inserted into the compressed air and self detonates which emits chemical energy. The gases then spread out and shift the pistons prior to being discharged in to the atmosphere. The combustion of diesel fuel, both complete and partial, creates a multifaceted mixture of compounds which remain as a mixture of gases and particles. A list of some of the gases is provided in the section above.
Q10   Who are the participants in the Showcase Project?
The Showcase project includes both fleet owner and device manufacturer participants. There are currently eighteen fleet owners involved in the project: 5 public fleets and 13 private fleets which account for a total of 230 vehicles. In total sixteen emission control manufacturers are contributing to the project to manufacture 29 systems: 11 active diesel particulate filters and 18 passive diesel particulate filters.
Q11   What are the Goals of the Showcase Project?
Emission Reduction- Particulate Matter and NOx emission reduction.
Demonstration of retrofit technology - Will help construction fleets gain experience with retrofit process. Interested fleets may view retrofits in action.
Verification of new devices - Participants are required to pursue verification concurrently with Showcase demonstration
Q12   What is Diesel Off-road On-line Reporting System (DOORS)?
The Diesel Off-Road On-Line Reporting System (DOORS) is an online tool designed to help fleet owners report their off-road diesel vehicle inventories and actions taken to reduce vehicle emissions to the Air Resources Board (ARB), as required by the In-Use Off-Road Diesel Regulation. Both the DOORS reporting tool and the DOORS User manual were created to help fleet owners comply with the regulation, but they are not a substitute for reading and comprehending the regulation. Many portions of the DOORS system will require fleet owners to understand terms and conditions defined in regulation, and to know which portions of the regulations apply to their vehicles, and where they are eligible for full or partial exemptions. It is strongly recommended that, prior to using the DOORS system, fleet owners determine how the regulation applies to their fleets.