Why is Engine RPM not directly proportional to Vehicle Speed, even when gears are not changed?
In: 4
It is if you are using a manual transmission, or an automatic transmission that has locked the torque converter.
The reason it is not in an automatic transmission is that the torque converter intentionally allows the engine and wheels to not turn at the same speed. This allows, for example, being able to stop at a stop sign or traffic light without having to shift to neutral, as well as allowing the automatic transmission to shift gears without having to disengage and engage a clutch. (There are “automated” transmissions that automatically shift but also have an automatically-controlled clutch, but those are usually found in semi trucks and need additional training [a CDL] to drive correctly)
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