Evaluation Of A New Generation Diesel Engine Forklift In Terms Of Noise Emissions

Forklifts (Counterbalance) are work machines that are used to carry and stack specialized or standardized loads with a special attachment connection adapted to the mast section according to the type of work to be done. Forklifts have different load lifting capacities and optional lifting heights. These vehicles cannot reach high speeds due to their nature and safety. According to the development of autonomous driving worldwide, a rapid development is observed in both technology and comfort parameters of warehouse transportation equipment. In the comfort-oriented evaluations of diesel forklifts, the noises originating from the combustion in the engine and the motion transmission in the mechanical units are the main ones; in addition, the noises originating from the wheel and road irregularities constitute the secondary noises originating from the imbalance in the mast system. In this study, the change in the internal and external noise measurements, i.e. the operator and the environment, of a new generation diesel engine forklift according to the ANSI/ITSDF B56 standard was examined. In the unloaded driving evaluation, it was determined that the noise emitted to the environment was 8% less than the noise coming to the operator. In the evaluation of the noise emitted to the environment, it was determined that the idle speed under no-load conditions was 20.7% lower than the maximum speed noise level. In the evaluation of the noise coming to the operator; it was determined that the effect of the load lifted at low speeds was 2.7% higher than the no-load condition, and that the idle speed was 17.6% lower than the maximum speed noise level under the same load condition