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MDA Technologies 3/2014

MDA Technologies 3/2014

Drive

Drive Technologies Interview with the Managing Directors Mr. Christian Hatz, Mr. Wolfram Hatz and the Head of Engine Design, Mr. Friedrich Peter What is special about your water-cooled 2-liter turbo engine? Christian Hatz: Our water-cooled engine is notable for its convenient handling because installation and maintenance are easy. Our competitors already made the step in direction of water-cooled products a long time ago. We were the last to offer only air-cooled engines in the power range up to 56 kW. A technology which has already been applied in cars is now used for mobile working machinery. Water is a good coolant in this power density. Which features of the engine are not immediately apparent? Friedrich Peter: The engine has got a service side. All filters, dipstick and oil refilling are located there. Due to the automatic valve adjustment, only one side of the engine must be accessible in the machine where the engine is installed. This facilitates the installation and maintenance. Besides, the exhaust gas pre-cooling upstream of the EGR valve with an exhaust gas cooling from 650 °C down to 400 °C is remarkable. In addition, the engine is fully electronically controlled and is CAN bus compatible. How does Hatz assess the market potential? Combustion strategy and turbocharger In order to reduce the thermal burden on the exhaust gas recirculation system, a number of innovative measures were designed: For example, a pre-cooling unit for exhaust gas recirculation, which cools the hot exhaust gases considerably before the EGR valve and thus simultaneously protects Christian Hatz: In Russia, Asia and Africa our simply designed engines are sufficient because the maintenance is often carried out by untrained personnel. We will launch the performanceoptimised water-cooled engine in Europe and the USA. Our aim is to offer both according to application, country of operation and qualification of the after sales service personnel. Wolfram Hatz: The cleaner the engine is, the more customers prefer it in countries with strict exhaust gas legislation. Apart from only two other suppliers, we can manage without diesel particulate filter, a technological advance which also saves construction space. How will the Hatz Diesel product portfolio development look like in future? Christian Hatz: We believe in the future of niche business. We will continue product development and maintenance of our air-cooled engines. The new water-cooled engine constitutes an add-on for our customers. In the range up to 56 kW, we will not replace any products but expand our portfolio. unsere Kunden. Im Bereich bis 56 kW werden keine Produkte abgelöst, sondern wir erweitern unser Portfolio. the valve against thermal damage and sooting. Further a optimized EGR mixing nozzle is used, which helps the recirculated exhaust gases to be evenly distributed with the fresh combustion air to all four cylinders. Together with the already mentioned injection technology, therefore, a very good exhaust quality can be achieved, which ensures that the 4H50TIC is equipped only with an oxidation catalyst. The engine falls significantly below the emission limits of the 97/68/EC and EPA even without the use of a particulate filter. Special attention was paid to the best compromise between response, maximum power, and generally high efficiency over the entire speed range during the matching of the wastegate turbocharger. Internal friction Another key to the extremely high fuel efficiency is the reduction of internal friction, which could be achieved because of the conservative design with very few moving parts. The 2-valve technology with roller tappets and the camshaft in block bear a substantial share of this. In addition, for connecting rod bearings and only high-end materials have been used. Serviceability With a service interval of 500 hours, the engine also scores in terms of customer service. The extended intervals are achieved because of a hydraulic valve adjustment and well dimensioned fuel filter. In addition, the engine is equipped with an engine protection system based on various sensors. In case of significant engine failures the engine shuts off in order to prevent capital damages. www.hatz-diesel.com Company name: Motorenfabrik Hatz Headquarters: Ruhstorf a.d. Rott, Germany Turnover: € 160 Mio. (2012) Employees: approx. 1,000 Products: Diesel Engines, Hydraulic Pumps, Power Systems, Pumping Systems About This Article is a contribution by 58 MDA Technologies 3/2014

Product News Hydraulics Unit for Test Applications Power controls for test applications can be put into practice with the compact pump unit type HK by Hawe Hydraulik (Germany). For this purpose, the unit is equipped with a radial piston pump, powered by a variable-speed motor and combined with the programmable logic controller valve control type PLVC. The unit can slowly build pressure so that the test piece will be charged with a continually increasing force across an extended period – even across several days. If the system is designed suitably, pressure is built up with an accuracy of less than 1 bar. Radial piston pumps are well suitable for this. In contrast to other pump types, they have no limit for the minimum speed. Speeds of 1/sec are possible as well. In the variable-speed design, the compact pump unit type HK is suitable even for a force-independent load development with defined speed progress. If a very precise speed control is needed, feedback through a path measuring system is recommended. Hose Test Bench Ensures Safety In the P 300 hose test bench by Uniflex, a special test fluid is used for additional preservation of the line. Hoses are safety-relevant components and transfer pressure and signals often even under very harsh usage conditions. They influence the safety of a hydraulic system and contribute decisively to its function. Newly produced hoses are subjected to a precise pressure test. The test result is documented for the customer with test minutes. All the important technical data of the hose are thus stored as a quality certificate. Most hoses are subjected to a pressure test in the areas of classification-requiring systems. www.uniflex-hydraulics.com www.hawe.com Linear Units with Double Support Whenever linear adjustment units require high twist stability and bending resilience when moving in any installation position, linear units with double support are used. For such cases, Ganter offers the double pipe linear units GN 491 and GN 492 as standard elements with a guide of two parallel pipes that can be configured differently. While the double pipe linear unit GN 491 has a compact carriage format, GN 492 works with a double carriage that carries a spacious adapter plate. For both models, the central, right- or left-rising trapezoid spindle has a ball bearing and is mostly designed for manual adjustment by handwheel. However, it can also be motor-powered using the shaft pin if lubricated accordingly. The rolled steel spindle permits precise placement of the guiding nut –and thus the carriage – to 0.2 mm per 300 mm of stroke on the chrome-plated and low-maintenance steel pipe guides, which has a standard range of 100 to 300 mm. www.ganter-griff.com PAM-199-P Universal to use with all proportional valves USB interface Flexible design for all typical applications High reliability For 15 years your partner for dynamic drive solutions W.E.St. Elektronik GmbH Gewerbering 31 · D-41372 Niederkrüchten Telefon: +49 (0)2163 577355-0 · Fax: +49 (0)2163 577355-11 E-Mail: info@w-e-st.de · Internet: www.w-e-st.de MDA Technologies 3/2014 59 West.indd 1 31.07.2014 10:31:01

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