The demand for diesel-powered vehicles is rising rapidly in Europe and may increase in many other markets such as United States due to mounting concerns over fuel economy and global warming. However to become more widespread, diesel vehicles must meet the stringent NOx and particulate matter (PM) emissions standards. Various after-treatment devices including diesel oxidation catalysts (DOC), selective catalytic reduction (SCR) catalysts, non-thermal plasma (NTP) catalysts, lean NOx traps (LNT), and diesel particulate filters (DPF) have been developed to meet these challenges. To be effective and durable, almost all after- treatment devices dealing with NOx and PM controls require addition of one or more reducing agents (reductants). The various injection systems offered in the industry today are often cumbersome, costly or ineffective.

The Ford On-Board Reductant Delivery System is an air-assisted injection system. The system uses just three components, a variable speed air compressor, a differential pressure sensor and a metering pump/mixer. The variable speed compressor replaces a conventional constant speed compressor with reservoir. With differential pressure control to accommodate fluctuations in exhaust pressure, proper air pressure is always maintain to ensure consistent dispersion of reductant. Urea flow is controlled with a metering pump, which replaces a conventional high-pressure pump plus a separate injector. By minimizing components and by matching operating conditions of the air and urea supplies, the entire system is smaller, more effective and more economical. This technology is to be used on diesel-powered vehicles at Ford (Focus).

Benefits Summary

The new On-Board Reductant Injection system not only reduces the cost over conventional systems but also is much simpler, quieter, 75% lighter, more compact, more efficient, more durable and plugging-resistant. The new system is compatible with on-board diagnostics (OBD) and provides accurate, excellent dispersion of diesel fuel or urea solution for vehicle after-treatment devices.

Licensing Opportunity
Diesel engine OEM and retrofitters are being informed of this technology and are directed to ServoTech currently under license with Ford Motor Company for manufacturing, distribution and sales. Please contact any of the individuals listed below for more information or a demonstration.