Avoiding driving bans with clean buses
Menden, on 11th July 2018 HJS regards ABE as state-of-the-art exhaust gas technology for the retrofit of public transport buses.
The newest buses in local public transport must today correspond to the exhaust gas standard Euro VI. Also in the view of critical environmentalists, these vehicles are clean with regard to their pollutants. In Germany there are at this time more than 28,000 city buses which, in past years, have not yet been registered with these modern engine and exhaust gas-concepts, and thus also contribute to the intra-urban pollution burden.
HJS has now presented an exhaust gas technology for these diesel buses, with which existing vehicles on the market can be subsequently equipped. With the installation, a drastic reduction in pollutants of even over 90% is achieved. Vehicles equipped with this HJS technology will be classified and financially promoted by the Federal Transport Department analogous to the latest buses.
For more than 2 years HJS has been developing this demanding technology:
- Real emission level Euro VI buses for existing vehicles
- Functional stability under all boundary conditions to – 7°C
- HJS retrofitting solutions meet the promotion directive of the BMVI
- The system is provided with a General Operating Permit (ABE)
This long-standing experience in working with the engine and vehicle industry has been helpful.
Promotion by the Federal Government
Buses in public transport drive on average more kilometres per annum in cities than all other transport means, cars or trucks. For good reasons, whether it be school children, pensioners or working people, the bus in the city, as well as bordering regions, is an indispensable possibility of achieving the objective reliably.
The high kilometre driving and the daily demands on public transport by many citizens initiated the Federal Government to issue a promotion of more than € 100 million for buses which are already in operation, in order to reduce as soon as possible the high levels of nitrogen oxide pollution by using clean buses in the cities by means of this financial stimulus. The objective is the avoidance of driving bans.
Federal promotion ensures general operating permit
Kraftfahrt-Bundesamt (Federal Office for Motor Vehicles) (KBA), at the beginning of July issued HJS with the first General Operating Permit (ABE) for the retrofit of the entire Euro V / EEV MAN Bus Family. The retrofit with the well-proven HJS SCRT® technology, extended by active thermo-management, guarantees best-possible lowering of the nitrogen oxide emissions for buses in city operation – on every route and in every season. With this, the retrofitting of buses with this HJS technology is one of the most efficient and effective ways of reducing nitrogen oxides in cities, and thus actively contributing to the avoidance of driving bans: public local transport can be brought to Euro VI level in the short term and at low cost. The retrofit is financed, according to the promotion directive published in March, mainly by the Federal Government.
Functioning of SCRT®TM with active thermo-management
Modern city buses of classification Euro VI, through the combined employment of particle filter and SCR technology, offer a maximum level of exhaust gas cleaning. However, buses in inner city transport frequently do not reach the temperature required for an optimum functioning of the SCR catalyzer. This effect is even more pronounced in the winter due to the low ambient temperature. The vehicle manufacturers meet the high requirements of the emission standard Euro VI first through the employment of engine thermo-management
HJS transfers this concept, as an autonomous system architecture, to the retrofit of existing vehicles. As a joint owner of the SCRT® patent with active thermo-management, HJS presents a retrofitting solution based on this AdBlue® technology. The solution of the established system supplier HJS registered by patent was developed on original equipment level, and enables the operation of existing EUROV/ EEV vehicles with the emission quality of modern Euro VI buses. As a result of active thermo-management, the system is functionally-stable, even at winter ambient temperatures and very slow driving
The active thermo-management with two networked actuators ensures that the best-possible NOx reduction is always realised in the SCR catalyzer – without having any influence on the engine. “The demanding promotion directives of the BMVI make active thermo-management indispensable. The necessary reduction performances of the systems cannot be guaranteed sustainably and permanently in real-life operation any other way” according to Dr.-Ing Christoph Menne, Managing Director at HJS.
The system presented by HJS for the MAN bus family of the generation Euro V / EEV meets the promotion directives published by the Federal Transport Department, within the framework of the “Immediate Program Clean Air”, and is available immediately, other versions for other bus manufacturers will follow in the second half of the year, Daimler/ EvoBus included in the short term.
|HJS Emission Technology GmbH & Co. KG
Annette Ritz, Marketing Service
Dieselweg 12, D-58706 Menden/Sauerland
|Telephone: +49 2373 987-218
As a family managed, middle-sized company with headquarters in Menden/Sauerland, we at HJS Emission Technology GmbH & Co. KG, which was founded in 1976, have long experience and high competence in the area of exhaust gas treatment. With more than 450 employees, we develop, produce and market systems for the reduction of emissions of pollutants and corresponding components. The innovative environmental protection technologies are used both in original equipment and in the retrofit of cars, heavy to light commercial vehicles, as well as mobile and fixed-in-place applications in the non-road area. As well as systems for ignition engines, HJS mainly offers solutions for diesel engines – in particular for the reduction of soot particles and nitrogen oxides. With extensive patent rights to DPF® (Diesel Particle Filter) and SCRT® (Selective Catalytic Reduction Technology), HJS sets standards in Germany and world-wide.