SCR CatalystsSCR SCR catalyzers are used in order to decrease nitrogen dioxide emissions (NOx = NO + NO2) according to the so-called SCR process. SCR stands for Selective Catalytic Reduction and designates a process by which harmful nitrogen dioxides are converted selectively, i.e. targeted to a suitable catalyzer. In case of HJS, the development of…
Diesel oxidation catalyzersDOC Diesel oxidation catalyzers (DOC) are used to decrease hydrocarbon (HC) and carbon monoxide (CO) emissions. HJS has been using this technology as early as since the beginning of the 1990s. In addition, there are numerous applications in which the DOC is used to oxidise nitric oxide (NO) to nitrogen dioxide (NO2). Functioning…
Three-way catalyzersTWC The three-way catalyzers are able to reduce three pollutant groups of an exhaust gas from internal combustion engines. As well as the various hydrocarbons (HC) and the carbon monoxide (CO), the three-way catalyzer can also reduce nitrogen oxides. In specialist use this catalyzer is also designated as a TWC (Three-Way-Catalyst). Technology and functioning…
Replacement diesel particle filterAT-DPF As early as since 2003, diesel particle filters for cars and light commercial vehicles have been offered. As a result of the Euro 5 Standard in 2009, they are a fixed component part of renewed authorised diesel vehicles. Meanwhile, the first original diesel particle filters must be replaced and hence the…
Ceramic filters passively regeneratedDPF-CRT A passively regenerated ceramic filter for individual requirements. HJS filter systems are based on filter modules which are manufactured from ceramic materials. They are often used where no large ash quantities occur. These filter systems can generally replace the original acoustic damper in the area of retrofitting and can be adapted…
Sintered Metal Filter – Active RegenerationSMF-AR The SMF AR system is ideally suited toward applications with deviating application profiles and frequently low exhaust gas temperatures. These low temperature applications are more commonly found on construction sites, on mobile machines and static equipment. The SMF AR System (Sintered Metal Filter with Active Regeneration) regenerates autonomously regardless…
Sintered Metal Filter Passive RegeneratedSMF-CRT The modular SMF® technology was developed specially for applications in the medium to high range of performance. These filter systems can generally replace the original acoustic damper in the area of retrofitting and can be adapted individually to the machines and stationary applications. Passively regenerated particle filter for individual requirements…
Partial flow sintered-metal filterpSMF For applications in which a complete removal of the soot particles from the exhaust gas is not required, HJS has developed a rugged and efficient partial flow filter on the basis of the well-proven SMF® technology. The efficiency is optional from 30% – 80%. Technology and functioning The hot engine exhaust…
Menden, August 2017 – Some Cities threaten that only vehicles with a blue plaque may enter the inner city. A lot of things are not decided yet, however, owners of mobile homes with diesel drive should think of the future. In cities and population centres, nitrogen oxide limit values are being exceeded. Result: Driving…
Menden, June 2017 – It is the future project of the city of London – and a milestone for the environment. HJS will make London city buses cleaner. With its English partners EEL, the company from South-Westphalia has been awarded the contract for retrofitting in London. HJS is part of the air purification future…
