Public Transport Buses

Exhaust-gas aftertreatment systems for public transport buses

Fit diesel particulate filters from HJS to older Euro II or Euro III buses to upgrade them for unrestricted mobility in low emission zones. read more ...


Exhaust-gas aftertreatment systems for coaches

The diesel particulate filter for coaches allows tour companies free access to german low emission zones. read more ...

Mobile Machinery

Exhaust-gas aftertreatment systems for mobile machinery

HJS offers modular diesel particulate filter systems specifically for industrial trucks, diggers and other industrial applications. read more ...

Heavy Duty Trucks

Exhaust-gas aftertreatment systems for trucks

HJS's product portfolio for the truck segment includes diesel particulate filters for everything from light- to heavy-duty trucks for short-haul and long-haul forwarding. (Aftermarket) read more ...

Sintered metal filter-AR

The right system for specific requirements!

The particulate filter of the SMF®-AR system can be regenerated at almost any engine operating point, irrespective of exhaust-gas temperature. read more ...


SCRT® – simultaneous reduction of soot particles and nitrogen oxides

His modular system is capable of removing almost all nitrogen oxide emissions from diesel exhaust gases. read more ...


DPF® refurbishing "Made by HJS"

Neben der Reinigung von Rußpartikeln wird auch die Prüfung der katalytischen Beschichtung mit einbezogen. read more ...

Electronic Control Unit

Monitor your HJS diesel particulate filter with our ECU diagnostics software

Our ECU (Electronic Control Unit) diagnostics software is required for installing, servicing and troubleshooting with an HJS diesel particulate filter system. read more ...

HJS exhaust-gas aftertreatment systems for retrofitting.
DPF®-Refurbishing, Electronic Control Unit, Industrial Silencers, SCRT®-Systems, SMF-AR - Thanks to our innovative technologies and products we are making an important contribution to protecting mankind and the environment.

About HJS Emission Technology GmbH & Co. KG

As a medium-sized company based in Menden in central Germany, HJS Emission Technology GmbH & Co. KG has many years of experience and expertise in the field of exhaust-gas aftertreatment. Some 500 employees are engaged in the development, production and marketing of modular systems for reducing pollutant emissions. Our innovative environmental protection technologies can be used either as original equipment or for retrofitting in passenger cars, commercial vehicles and a wide range of non-road applications. read more ...

London Low Emission Zone

The London Low Emission Zone (LEZ) Phases III and IV are implemented-technical solutions that enable the Transport, Bus and Private Operator HGV Industry to comply with the demands and needs of the LEZ are in urgent need. read more ...   |   |   |   |   |