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MDA Technologies 3/2014

MDA Technologies 3/2014

Rubrizierungsebene I

Rubrizierungsebene I rubrizierungsebebe 2 xxx Water-cooled 55 kW engine complies downsizing strategy Fabian Ottmann Hatz Diesel unveils the first engine of a newly developed water-cooled engine series. The 2-liter turbo engine sets new standards in its class in terms of fuel efficiency, power density and robustness. Fabian Ottmann, Public Relations and Marketing Manager, Motorenfabrik Hatz GmbH & Co. KG, Ruhstorf a.d. Rott, Germany 56 MDA Technologies 3/2014

Drive Technologies new engine family will expand the portfolio of the Motorenfabrik Hatz, which A celebrated its world premiere with the presentation of the 4-cylinder version at the Bauma 2013. The 2-liter diesel engine, which is equipped with a Bosch common rail injection system, turbocharger and external exhaust gas recirculation is in series production since beginning of 2014. Like all Hatz engines, this engine also brings a number of technical refinements with it, which leads to the fact that the engine is the most compact in its class, and has the best fuel efficiency in comparison to competitiors. Downsizing approach When developing the 4H50TIC, a groundbreaking downsizing approach was followed. The primary development goals Technical Data Sheet 4H50TIC Cylinders 4 Displacement [ccm] 1,952 Valves per cylinder 2 were the reduction of size and weight combined with high performance and good exhaust gas values. The result is a turbocharged 2-liter engine which achieves a maximum output of 55 kW. With a weight of 173 kg it is the benchmark in its class. The engine meets the strict limits of the 97/68/EC Stage IIIB and EPA Tier 4 final without a particulate filter. The engine crankcase is made of a thinwall cast iron, the cylinder head and valve cover made of cast aluminum and the oil sump of steel. All parts are optimized in terms of weight and structural mechanics. Design for long engine life All mechanical components have been developed with a conservative but yet inno- F power [kW/PS] 55,4/75,3 2600 rmp 55,4/75,3 2800 rmp IFN power [kW/PS] 45,9/62,4 2300 rmp 51,3/69,8 2600 rmp 55/74,8 2800 rmp Power generator set IFN [kW/PS] 28,7/39,0 1500 rmp 38,0/51,7 1800 rmp 50,0/68,0 3000 rmp combustion Direct injection, turbo charged, intercooler and external cooled EGR Injection system Bosch Common Rail OHW, max. 1800 bar Compression ratio 17,5:1 Lower idle speed[rpm] 900 Maximum speed (idle) [rpm] 3300 max. torque [Nm@rpm] 240,0@1600 Weight [kg] 173 Cooling system Water cooling Best fuel consumption [g/kWh] 210 Emission level EU 97/68 Stage IIIB, US EPA TIER IV final Exhaust aftertreatment Oxidation catalyst vative approach. The 4H50TIC is equipped with two valves per cylinder, whereby a high efficiency, mechanical robustness and functional simplicity has been achieved. This leads in turn to the well-known robustness of Hatz products. Despite some principle related thermodynamic disadvantages of the chosen 2-valve technology in comparison to multi-valve technology, emission values are achieved, which significantly fall below the requirements of the 97/68/EC and EPA, mainly because of optimized piston bowl and injection technology. According to the Hatz quality standards, the selection of suppliers has been made: For all essential parts of the engine such as fuel injection, crankcase, crankshaft, camshaft, exhaust gas recirculation valve, catalyst and sensors, the company has opted for premium products from reputable suppliers which mostly come from Germany. For maximum fuel efficiency One of the key factors contributing to the high power density of the 4H50TIC is the Bosch Off-Highway common rail system with 1800 bars, which is used for the first time in industrial diesel engines. In this case the system works with three injections per working cycle; a pre-, main-and postinjection. By that the perfect balance between durability, quiet combustion noise and excellent emission values is reached. In terms of fuel efficiency, the new engine sets new standards with a specific fuel consumption of just 210 g / kWh at the best point. The speciality is that the low fuel consumption is achieved in a wide load and speed range. This makes the 4H50TIC the most efficient engine in the class from 37 to 56 kW. MDA Technologies 3/2014 57

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