What does the term "drivability" refer to in the context of emissions testing?

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In the context of emissions testing, "drivability" refers specifically to the operational competence of the vehicle, which directly impacts emissions during the testing process. Drivability encompasses how smoothly the vehicle operates, including aspects such as engine performance, throttle response, idling quality, and overall handling. A vehicle that runs well will demonstrate lower emissions as it is more efficient in burning fuel and managing exhaust gases.

When a vehicle has poor drivability, problems such as misfires, rich fuel mixtures, or unresponsive acceleration may occur, leading to increased emissions that could result in a failed emissions test. Therefore, assessing drivability is crucial during emissions testing, as it helps inspectors understand how well the vehicle is performing in real-world driving conditions and the implications it has for compliance with emissions standards.

This understanding is essential because while factors such as fuel consumption, comfort, and design features can influence the driving experience, they do not directly correlate with the vehicle's emissions performance during testing as explicitly as drivability does.

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