Investigation into the performance characteristics of electric automobiles by means of a data logger

When converting an internal combustion vehicle to electric power, it is important to choose the right transmission gear ratio to ensure optimum performance of the vehicle. A converted automobile is usually equipped with a standard transmission gearbox, while the motor control block is programmed for one particular gear. During the operation of an electric automobile, the gears could be shifted, when the automobile is stopped, as the clutch is not used by the electric automobile. In choosing a gear ratio, a priority could be to ensure good dynamic performance or high speed achievement. However, one of the most important parameters is energy consumption and the distance covered per charge. After identifying the optimum gear ratio or the gear to be used, the unused gears of the transmission gearbox of the converted vehicle could be dismantled, thereby reducing the weight of the vehicle and increasing the transmission gear ratio. A converted Renault Clio with a 96 V battery system and a standard 5-speed transmission gearbox was road tested. The experimental dataspeed, change in voltage and current, battery temperature and measurement time were recorded by a multichannel data logger. The road tests were carried out at constant speeds-50 and 90 km•h-1. The road tests showed that energy consumption by the electric automobile in the fourth gear at 50 km•h-1 was the lowest, consuming a power of 5.86 kW, while in the fourth gear at 90 km•h-1 it consumed 15.43 kW.

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Energy use efficiency of electric automobile depending on transmission gear ratio

Berjoza

Pīrs

Jurgena

et al. 2018

Engineering for Rural Development

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Investigation into the performance characteristics of electric automobiles by means of a data logger

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Energy use efficiency of electric automobile depending on transmission gear ratio

Energy use efficiency of electric automobile depending on transmission gear ratio

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