Efficiency in Urban Traffic: Start-Stop System and Its Significance for the Taxi Industry
The start-stop system is designed to automatically switch off the internal combustion engine during idle phases. Especially in the taxi industry, where vehicles often operate in urban areas and have many idle times at traffic lights or in parking bays, the system could contribute to lower fuel consumption. The ADAC assumes a fuel saving of up to 15 percent in city traffic, in practice it is usually 0.3 to 0.5 liters per 100 kilometers. This can be economically significant in the long term given the high mileage in taxi operations.
Functionality and Technical Conditions
The start-stop system engages as soon as the vehicle comes to a standstill and certain conditions are met. Depending on the type of transmission, it is sufficient to apply the brake or put the vehicle in neutral to turn off the engine. Modern systems automatically restart the engine as soon as traffic starts moving again. Sensors also check whether the use of the system is appropriate. For example, the engine remains active if the battery is not adequately charged or if high temperatures require continuous air conditioning.
Resistance to Automation
In practice, the technology does not meet with acceptance everywhere. Many taxi drivers deliberately deactivate the automation because they fear delays when starting off or consider the wear on the battery and starter motor to be problematic. In fact, modern vehicles are designed for frequent restarts. Special AGM or EFB batteries, as well as reinforced starters and alternators, are intended to withstand the increased stresses.
Impact on Environment and Operating Costs
Those who permanently switch off the automation not only accept higher fuel consumption but also contribute to avoidable emissions and additional noise pollution in urban traffic. For taxi companies, the question arises as to whether the potential savings outweigh the skepticism towards the technology. It is clear that fuel consumption represents a significant cost component.
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