Bosch systems effectively reduce emissions

New Denoxtronic 6.5 for emerging markets

With Denoxtronic and Departronic, Bosch offers two proven exhaust-gas treatment systems for commercial-vehicle applications. Denoxtronic allows nitrogen oxides to be reduced by up to 95 percent, and fuel consumption by up to five percent. Denoxtronic 6.5 has been developed especially for applications in the emerging markets. Departronic injects a controlled amount of fuel into the exhaust tract, allowing the regeneration of the particulate filter. Denoxtronic and Departronic can be jointly controlled in the engine control unit. They help commercial-vehicle manufacturers to comply with future emissions standards such as US16, Euro VI, and Tier 4 final.

Denoxtronic: reliable, robust system for all markets and segments Denoxtronic 2.2 is designed for use in the heavy and medium-duty segments, as well as in off-highway applications such as tractors and construction machinery. In addition, it can be used in engines in the marine segment.

The new Denoxtronic 6.x, an especially cost-effective and robust variant, has been designed as a modular kit, and can thus cover all markets and commercial-vehicle segments. This is the basis for the Denoxtronic 6.5 variant, which is designed especially for the emerging markets.

It was designed primarily for the technical and economic requirements in India (CN 4/5) and India (BS 4/5).

Denoxtronic has a long service life and, thanks to its modular construction, can be integrated flexibly and easily into many different vehicle models. The electronic control system for Denoxtronic can be integrated either into the engine control unit or into a separate metering control unit, depending on which option customers prefer. Both Denoxtronic 2.2 and Denoxtronic 6.x are available for both 12- and 24-volt vehicle electrical systems.

Departronic: metering system for regenerating the particulate filter The Bosch Departronic diesel-metering system regenerates particulate filters in medium and heavy-duty commercial vehicles, as well as in offhighway applications. It injects a precisely metered quantity of diesel into the exhaust flow, upstream of the oxidation catalyst. As this fuel burns, exhaust temperatures rise to roughly 600 degrees Celsius. This temperature increase causes the soot collected in the particulate filter to burn off. Compared with post-injection in the engine itself, Departronic is more economical: since the engine oil is not diluted nearly as much, if at all, it does not need to be changed nearly as often.

The successful second Departronic generation has been in series production since 2010, and has been improved in a variety of ways. Because Departronic can now handle a higher fuel supply pressure, diesel can be pumped into the system more flexibly from the low-pressure circuit of the diesel injection system. Departronic is self-cleaning and thus requires no maintenance. Its components are designed to withstand the conditions to be found in commercial vehicles and the off-highway environment. The entire system has also been made lighter and more compact than the previous generation, and is designed for 12 and 24-volt operation.