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A garbage truck is a specially designed vehicle to collect small quantities of waste and haul the collected waste to a solid waste treatment facility. These trucks powered by diesel engine are a common sight in most urban areas. The main features of them are noisy, smelly and contaminating the environment by emission respectively. Some of these harmful effects may be reduced or eliminated by replacing the diesel engine by an electric motor. In this paper we consider the technical options of replacing in terms of vehicle dynamic and bearing capability of the modified drive train parts. The rebuilding is supported by the GOP-1.1.1-11-2012-0617 Economy Developing Operative Programme implemented at the Electrical Engineering and Mechatronics Department, Faculty of Engineering, University of Debrecen. Keywords— power density, gradeability, torque demand, load consideration I. ELIGIBLE RESOLUTIONS FOR DRIVETRAIN MODIFICATION 1.1. Power density and storage density Fig. 1 shows the power and energy-storage densities for various propulsion concepts. Both the power density (W/kg) and the energy-storage density (Wh/kg) of the combined engine/energy-storage system must be high to achieve the desired performance (acceleration, speed). The vehicle's operating time – and thus the operating range which can be covered before the energy-storage device must be replenished (renewed/ refilled/recharged) is a function of the energy-storage density, the power requirement, and the vehicle weight. Although the power-to-weight ratios combining with high energy-storage densities (period of operation per tank of fuel) make internal-combustion engines (ICE) particularly suitable for vehicular applications, the torque curves are less satisfactory, see Fig. 2. Thus a transmission unit is required for both the transfer and the conversion of torque. The unit must be capable of transmitting torque for starting off while incorporating various torque-conversion ratios (for ascending gradients and selecting different speed ranges). Electric driven vehicles also may need a transmission due to the limitations imposed by the allowed current at starting. Fig. 1: Power and energy-storage densities for various propulsion concepts [1] 1 Gas turbine, 2 Internal combustion engine, 3 Externalcombustion engine, 4 Electric motor with fuel cell, 5 Lithiumchloride battery, 6 Zinc-air battery, 7 Nickel-cadmium battery, 8 Lead acid battery. Recent Innovations in Mechatronics (RIiM) Vol. 1. (2014). No. 1-2. DOI: 10.17667/riim.2014.1-2/9. Fig. 2: Relative torques for various power units [2] 1.2. Choice of replacing propulsion system In the urban area when collecting garbage, the average speed of the vehicle is approximately 3-4 km/h, due to the nonstationary operation. If the solid waste treatment facility situates close to the urban area, inside the operating range of an electrical vehicle, it is expedient to replace the internal combustion engine of the truck by electric motor and Lithiumchloride battery, with or without transmission respectively. This way, the harmful effects of the diesel engine such as noisy, smelly and contamination of the environment by emission may be eliminated or reduced. II. REPLACING THE ICE BY ELECTRIC MOTOR The rebuilt vehicle must be capable of effecting the transition from a stationary to a mobile state. Once in motion, it must be able to ascend gradients and accelerate to the desired cruising speed with a reasonable degree of alacrity. In this paper we consider the technical options of replacing in terms of vehicle dynamic and bearing capability of the modified drive train parts. Only the engine, transmission and universal joint shaft may be covered in the modification. The suspension and the rear axle with the differential are not affected. 2.1. Vehicle dynamic consideration 2.1.

Replacing the ICE by electric motor of the IVECO 150E Eurocargo Hard-Press Garbage Truck