Comparison of performance and fuel consumption in vehicles according to different transmission types

Transmission is one of the most important power transmission organs concerning vehicle dynamics in the automotive industry. Transmissions play an important role in vehicle performance and fuel economy among the power transmission organs that provide the transmission of the power produced in the engine to the wheels. If the vehicle and the transmission are taken as functional systems, the number of gears, the gear ratio of each gear and the resultant gear ratio can be evaluated and it can be decided how the gearbox design will be. The designer decides on the maximum speed of the vehicle, the acceleration appropriate to the vehicle, and the required climbing performance and operating conditions of the vehicle. Another factor limiting the design is the transmission's efficiency in power transmission and especially fuel consumption. In this study, the effect of manual, CVT and EDC transmission types used for power transmission in vehicles on vehicle performance was investigated. For this purpose, five vehicles from A to E with different transmission ratios were determined. The determined vehicles were compared in terms of speed, acceleration, engine power, inclination factor, driving force, and total resistance forces. In D and E vehicles with the same engine power and torque, the amount of fuel consumed and fuel economy were also evaluated. As a result of the study, it was seen that the B vehicle with transmission type CVT has a more powerful engine with an engine power of 148.7 kW compared to other vehicles, but it lags behind other vehicles in terms of driving force and acceleration due to low gear ratios. When the speeds of the vehicles were compared, it was determined that B and D vehicles reached the highest speed value with 220 km / hour. As a result of the evaluations made in terms of fuel consumption and fuel economy, it was determined that the D vehicle with manual transmission consumes 4.66% more fuel when the technical features are taken into consideration, and the automatic transmission vehicle E consumes 1.48% more fuel when only the gear ratios are considered.