|Hilite SCR doser injection nozzle. Click to enlarge.|
Cummins Inc. has signed an agreement to acquire the assets associated with the emissions control products of Hilite International. Hilite’s selective catalytic reduction (SCR) doser technology will become part of Cummins Emission Solutions (CES), allowing Cummins to serve all major market applications with a Cummins doser.
Hilite offers both air-assisted and liquid-only SCR components. Air-assisted components use onboard compressed air to precisely dose the reduction medium into the exhaust pipe. Liquid-only components, Hilite’s newest-generation dosers, run without compressed air and also provide application-tailored sprays in order to achieve the most stringent emission requirements.
Aftertreatment systems comprise a number of subsystems: controls, sensors, dosers, catalysts and substrates, and packaging. The effective integration of these subsystems is critical to the performance of the aftertreatment system and the overall engine system, Cummins notes.
SCR doser technology is a critical enabler for the performance and durability of SCR aftertreatment systems and represents a significant growth opportunity for Cummins, the company says. Two doser technology parameters—NOx reduction performance and integration flexibility—are essential for the whole aftertreatment system.
Ammonia distribution in front of the catalyst has to be homogeneous across all engine loads. This can only be achieved through a match between the reductant spray and the exhaust gas flow. The exhaust aftertreatment system needs to be up and running quickly, even under freezing conditions, for all applications. For optimized costs, the same basic dosing components need to fit in all applications, on-road and off-road.
The purchase price was not disclosed and the acquisition, expected to close in the third quarter of 2012, is subject to German regulatory approval. Hilite, based in Marktheidenfeld, Germany, is a portfolio company of 3i.
The market for aftertreatment products is driven by increasingly stringent government regulations of the emissions that diesel engines are allowed to release into the atmosphere. The primary standard drivers for new regulations are the United States’ Environmental Protection Agency and the equivalent body of the European Union.
Over the past decade, both organizations have tightened the level of permissible emissions of particulate matter (PM), oxides of nitrogen (NOx), carbon monoxide (CO), and un-burnt hydrocarbons (HC). Mature market on-highway standards are now being implemented in emerging markets like China, India, Brazil, Russia as well as off-highway markets primarily in the United States, Europe and Japan.