The new hybrid electrical and mechanical combination device for power generation. At BAUMA 2019, the hybrid electrical and mechanical combination unit K-HEM (KOHLER Hybrid Energy Module) will be presented. In view of the changes that the new emissions directive will bring to the offroad sector from 1 January 2019, the range has been expanded to include a product that is able to meet the new requirements of equipment manufacturers in this sector. There are a large number of energy sources on the market. Instead of studying their different applications and individual characteristics, it has been decided to integrate and couple them in order to exploit their full potential value. This is the philosophy of K-HEM, the unit that generates electricity from a combination of an 18 kW KDW 1003 stage V diesel engine without DPF and a 48 volt electric motor that guarantees 15 kW peak power and 9 kW continuous power. This means that the plant can provide over 30 kW without exhaust aftertreatment systems. The features offered by this hybrid unit have been designed to meet the requirements of all types of equipment characterised by intermittent duty cycles requiring power peaks and machines running mainly continuous low load duty cycles that prevent them from reaching the temperatures required for passive regeneration within the particulate filter. With K-HEM, the power base is provided by the combustion engine, while the power peaks are guaranteed by the electric motor. This system, which complies with the limits laid down in Stage 5 standards, al-
lows machines to avoid derating and guarantees high productivity. With the integrated master control unit, users can monitor and manage working modes and transitions according to their needs. All this results in machines that are able to take advantage of all the benefits of integrating mechanical and electrical power: less complex engines; no aftertreatment systems; the ability to store and use excess energy; energy recovery during the braking and exhaust phase; the ability to control operation with the main control unit; and the reduction of gas emissions, noise and consumption rates and improved performance and power modulation, thanks to the integrated management of each operation. • Due to the dual function of the electrical component, which works both as a generator and as an auxiliary motor, it is possible to recover energy from the transmission system during the braking and exhaust phase of the machine and from the combustion
engine itself during the operating phases with low energy requirements. The energy stored in the battery is thus available when the machine needs more than the threshold of 18 thermal kW of installed power and even more than 30 kW. This translates into considerable savings in terms of emissions, consumption and installed thermal power. • Equipment manufacturers do not have to worry about possible installation problems as the hybrid unit can be integrated into a hydraulic system or mechanical transmission like a diesel engine. • Each actuator can be controlled by the hydraulic or electrical system as required and controlled by the higher-level control unit that monitors the system. The most striking example is that of agricultural attachments: the ability to disconnect them from the mechanics and manage them via the electrical system now makes it possible to optimise operation.
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