CLAAS Selbstfahrende Erntemaschinen GmbH "DYNAMIC POWER" DLG Test Report 6027 F Brief description Manufacturer

Transcription

1 CLAAS Selbstfahrende Erntemaschinen GmbH "DYNAMIC POWER" Operation in grass with a CLAAS Jaguar 960 Tier 4i DLG Test Report 6027 F Brief description Manufacturer CLAAS Selbstfahrende Erntemaschinen GmbH Münsterstrasse 33 D Harsewinkel Comparison of the "DYNAMIC POWER" engine characteristic control to the conventional system used for grass applications: Operating mode "DYNAMIC POWER" Description of the machine settings and harvesting conditions Determination of the dry matter content using the oven drying method in the laboratory Identification of the process times without turning times Fuel consumption measurements, including AdBlue consumption Calculation of the fuel consumption in l/h and l/t fresh mass Identification of the harvest quantity on a certified truck scale Calculation of the throughput in tonnes/h DLG e.v. Test Center Technology and Farm Inputs DLG Test Report 6027 F Page 1 of 6

2 Technical description CLAAS Jaguar 960 Tier 4i The machine used is a JAGUAR 960, which meets the emission standards Tier 4i or respectively Euro 3b. The machine is equipped with an SCR (Selective Catalytic Reduction) system. The Mercedes engine delivers 480 kw (653 hp) according to ECE R 120 at 1,800 rpm. The machine uses the proven drive concept which has a belt drive running from the transversely mounted engine. All crop flow components, from the cutter head to the corn cracker all the way up to the accelerator are directly driven. The forage harvester is equipped with a "V-Max" knife drum, variable chop length adjustment and adjustable accelerator position. Additionally CLAAS offers a job management function for the acquisition of the harvest amount, fuel consumption and area coverage. All this data can be stored in the terminal ("CEBIS") and optionally printed, read via chip card or transferred online. During the test period, a CLAAS front attachment "Pick UP 300" with a 3.00 m working width was used. Figure 2: CLAAS Jaguar product photo, view of the drive unit in the forage harvester DLG Test Report 6027 F Page 2 of 6

3 Functional principle DYNAMIC POWER The "DYNAMIC POWER" system offers a level of performance according to the current requirement and provides this power in a tiered manner. The machine will detect if the forage harvester cannot be operated at the optimal point of consumption and performance due to external conditions (e.g. low yielding grass). The forage harvester then automatically reduces its performance. In response to the lower power pro vision of the motor the RPM will decrease and move to the optimum speed range between rpm. Depending on harvesting conditions and load situations, engine power can be increased or decreased. An intervention by the driver or a pre-selection is not required. The "DYNAMIC POWER" system can be activated or deactivated as required in the terminal ("CEBIS"). In addition, the "DYNAMIC POWER" system can be combined with the cruise control. For a better comparison this was used within the scope of the measurement to maintain the environmental conditions as constant as possible. The graph illustrates the behaviour of the engine characteristic control "DYNAMIC POWER" under different harvesting conditions. The data is not based on the current test, but rather provides a data statement for an average harvest day. The 10 stages shown automatically adapt to the harvesting conditions. Through the adapted engine behaviour a reduction in fuel consumption can be achieved per ton of fresh mass, in the partial load range where full engine power is not required. Figure 3: Functional description of DYNAMIC POWER, comparison with DYNAMIC POWER enabled and disabled (see also JAGUAR 2012) DLG Test Report 6027 F Page 3 of 6

4 Test content and implementation the swath conditions the machine mainly operated at power levels between 2 and 5 (Fig. 3). Figure 4: Harvesting conditions during the test period with an average dry matter content of 31.3 % The DLG Focus Test "Fuel consumption and throughput in grass" was carried out on a dairy farm in Mecklenburg-Western Pomerania during third cut grass. The aim of the experiment was to determine the potential fuel consumption savings of "DYNAMIC POWER" in comparison to the conventional system and to simultaneously quantify the harvest quantity throughput. The aim of this was to achieve a possible max. throughput and fuel consumption without "DYNAMIC POWER" with speeds up to max. 15 km/h. An engine overloading to 1800 rpm could not be achieved under these conditions without "DYNAMIC POWER". During the test series operation cruise control was activated to ensure a uniform and constant speed. Depending on To ensure comparable conditions between the "DYNAMIC POWER" enabled and disabled test series, single swaths were collected alternately with the forage harvester. During the test period, a dry matter content between 25 % and 50 % was measured which led to an average value of 31.3 %. A ley grass and field grass mix was harvested on extensively cultivated grassland areas that had suffered from heavy rainfall and flooding in the summer. Both grass types were evenly distributed between the different measurement series. The average swath density of the fresh mass was 10.1 kg/m (3.9 kg dry matter/m), the average swath widths were 1.2 m wide and 0.3 m high, which corresponds to an average yield of 3.41 t dry wt/hectare. In total, 457 tons of fresh mass grass at an average driving speed of 11 km/h were harvested and used as a meaningful reference for the evaluation of the measurement results. Throughout the entire experimental period the settings on the forage harvester and grass pick-up were unaltered. The length of cut was adjusted to 22 mm and the accelerator position was set to 4 mm. In addition, all test-run operations were performed in the 2nd drive gear and with all-wheel drive. The knife drum was equipped with 18 blades and the shear bar was set to position 3 according to the ("CEBIS") display. At least once a day, the knives were sharpened with 15 cycles. The utility attachment was operated with the fast feed-in speed and a pick-up height of % according to the ("CEBIS") display. At the beginning of the actual measurements, two test versions without "DYNAMIC POWER" at max. speed were performed. Figure 5: CLAAS Jaguar Tier 4i at the swath beginning, shortly before a series of experiments DLG Test Report 6027 F Page 4 of 6

5 Test results Table 1: Comparative results table for "DYNAMIC POWER" enabled/disabled DYNAMIC POWER enabled DYNAMIC POWER disabled Difference Engine speed 1881 rpm 2051 rpm 8.3 % Fuel consumption 72.5 l/h 82.7 l/h 12.3 % Fuel consumption 0.84 l/t fresh mass 0.94 l/t fresh mass 10.6 % Average AdBlue consumption 3.78 l/h 3.65 l/h 3.4 % 3.72 l/h AdBlue consumption 29.2 l/t fresh mass 28.8 l/t fresh mass 1.4 % 2.9 l/t fresh mass Fresh mass t t 3.9 % Throughput fresh mass 97.0 t/h 99.2 t/h 2.2 % 98.1 t/h Table 1 shows the experimental results in overview. The test results shown are the pure processing times without turning times throughout the test period. From the table it can be identified that under the experimental conditions a remarkable saving in fuel consumption of 10.6 % per l/t of fresh mass was achieved with "DYNAMIC POWER". The results clearly demonstrate that a lowering of the engine speed through a tiered process is a crucial factor when trying to attain fuel savings. The measurements also revealed that the ratio of diesel consumption to AdBlue consumption can be expected to be about 5 % and should be anticipated to be approx. 30 ml (0.03 l) per ton of fresh mass. The average throughput of 98 t/h of fresh mass for a third cutting of grass is a common value that reflects the good experimental conditions. Figure 6 shows the fuel savings with "DYNAMIC POWER" activated compared to "DYNAMIC POWER" disabled in a graphical form. Hereby, it can be clearly seen that the AdBlue consumption remains constant in relation to the comparison and thus represents a predictable Fuel consumption [l/t fresh mass] DYNAMIC POWER activated 10.6 % factor for calculation of costs for every harvested ton of fresh mass. The AdBlue consumption should therefore be included in the calculation when machines are compared that do not require an additional AdBlue injection. DYNAMIC POWER disabled rpm 2051 rpm Engine speed AdBlue consumption [l/t fresh mass] Figure 6: Result comparison graph "DYNAMIC POWER" regarding the fuel consumption l/t FM and engine speed, including the AdBlue consumption DLG Test Report 6027 F Page 5 of 6

6 Summary Through the intelligent engine characteristic control "DYNAMIC POWER" from CLAAS for the Jaguar series, only the required engine power is provided at any given time. Depending on the power requirement, a reduction of the fuel consumption can be achieved in the partial load range where the full engine power is not required. According to the test measurements of the DLG Test Center, the engine characteristic control provides fuel savings of 10.6 % per l/t fresh mass at a reduced engine speed (1881 rpm) and 8.3 % compared to the conventional system (2051 rpm). Due to the new emissions standard Tier 4i, CLAAS will install an additional AdBlue tank into the forage harvesters of the series. The AdBlue - consumption here can be rated at about 5 % of the diesel consumption. In summary, the "DYNAMIC POWER" system is a very helpful contribution to saving fuel in grass applications, without reducing the ride comfort or the throughput potential. Since the engine speed can not be kept constant under the above stated experimental conditions (without engine overloading), the ride comfort for the driver can slightly change. It must also be considered that during grass applications higher engine speed fluctuations can occur as, for example, during corn harvesting applications regardless of "DYNAMIC POWER". The dynamic behaviour of the 10 "DYNAMIC POWER" levels requires the driver to anticipate the auto matic adjusting of the engine speed depending on harvesting conditions, but it also ensures that the cutter forage harvester is always operating at the optimum working point. Test Realization of the test DLG e.v. Test Center Technology and Farm Inputs, Max-Eyth-Weg 1, D Gross-Umstadt Evaluation of the results and reporting Dipl.-Ing. (FH) Johannes Speer ENTAM European Network for Testing of Agricultural Machines, is the association of European test centres. ENTAM s objective is the Europe-wide distribution of test results for farmers, agricultural equipment dealers, and producers. More information about the Network is available at or by writing to ENTAM at the address: info@entam.com April 2013 DLG DLG e.v. Test Center Technology and Farm Inputs Max-Eyth-Weg 1, D Gross-Umstadt, Telephone: , Fax: , Tech@DLG.org, Internet: Download of all DLG test reports free of charge at: DLG Test Report 6027 F Page 6 of 6