Hatz 4H50TIC compliant with OAPC in Switzerland

The 55-kW engine with BOSCH common-rail-system, exhaust gas recirculation and exhaust gas turbocharger was additionally equipped with a diesel particulate filter for the use in Switzerland. Conformity allows the use of the 4H50TIC in other emission-sensitive areas in the EU.

The Hatz 4H50TIC diesel engine, which is available since the beginning of the year, receives, equipped with an optional available diesel particulate filter (DPF), the certificate of conformity with the Ordinance on Air Pollution Control (OAPC) of the Federal Office for the Environment (FOEN) in Switzerland. The latest Hatz engine fulfills the strict requirements of the Air Pollution Control Ordinance, and can from now on be operated in machinery in Switzerland. Since 2009, new construction machinery with an output of 18 kW and more must keep a particle number limit or must alternatively be equipped with a certified particulate filter system in Switzerland.

The 4H50 already meets the very strict requirements of the EU 97/68 Stage IIIB and EPA Tier 4f without the use of a particle filter, however, for underground use, tunnel construction as well as in emission-sensitive metropolitan areas with their local requirements, often a DPF it is mandatory. Through the adaptation of the particle filter in conjunction with the certificate of the FOEN, the 4H50TIC can be used not only in Switzerland but also in areas that have special requirements for exhaust gas after treatment.

Together with development partners, the filter system was developed especially for the high requirements of an industrial engine. Because of high runtimes in the low-load range, the increase of the exhaust gas temperature which is required for regeneration of the filter system represents a major challenge. In order to reach the exhaust gas temperatures of about 550 °C, a special HC evaporator injects diesel into the exhaust system to raise the temperature. In this way the particles are being burnt and ensure a complete regeneration of the filter. The exhaust after treatment can be mounted in various positions and thus contributes to a variety of application areas. In order to increase the maintainability, the particle filter is designed to be separable and can be removed for cleaning. This is reflected in lower operating costs compared to closed particle filter systems. Manual cleaning is considerably less expensive than replacing the complete system.

The 4H50TIC is a water-cooled 4-cylinder engine with a maximum power of 55 kW. The 2-liter turbo engine, equipped with a BOSCH common rail system with 1800 bar, weighs just 173 kg and sets the benchmark in terms of power-to-weight ratio in its class. Besides, the engine can score with its low fuel consumption of just 210 g/kWh in the best efficiency point. Apart from the low consumption at the best efficiency point, the engine underlines its efficiency further with a consumption of just 240 g / kWh in a very wide speed and load range.

The development of 4H50TIC is funded by the Federal Ministry of Economics and Technology based on a decision of the German Bundestag.