Determination of Helical Spring Coefficient of Electric Motor Micro-Truck Vehicle with Independent Suspension on Front Axle 2024-01-5020

Load-carrying transportation has recently increased due to cargo and online home shopping. As a result, there is a growing demand for vehicles that can pass through narrow streets and carry loads for short distances. Electric vehicles are vital in the automotive industry due to their zero emissions and further promotion through new regulations. This study is focused on determining the spring coefficients of helical springs for a micro-truck vehicle, which will be used for cargo transportation and has a leaf spring with a specific spring coefficient on the rear axle and an independent double wishbone suspension system on the front axle. In addition to being vehicles with low weight values, micro-trucks have the axle capacity required for urban transportation due to their low track width and dimensions. Correctly determining the leaf spring is essential as it will directly affect the loads on the suspension system, wheel life, energy consumption, and comfort level. When determining the spring coefficient, it is essential to decide on the bounce, pitch, and ride frequency values and evaluate the vehicle’s bump passing and comfort. In this context, along with theoretical calculations, quarter-vehicle, half-vehicle, and full-vehicle models were established, and the characteristics of the front suspension and the whole vehicle were determined.