Humidity sensors as part of engine control

[JSSheridan]

Can anyone tell me if humidity sensors were or are being used in automobiles or any engines? Also, what benefits would be gained from using such a sensor and would it be worth the trouble to implement it? Thanks.

[sierrap615]

i have never seen or heard of one before, but they have a sensor for everything else basicly, maybe one day there will be.

i do know during a heavy rainstorm the air is wet enough to affect the air/fuel raito. i think the engine runs a little rich due to the water taking place of air(hence less burnible air). i don't know how much of a real affect humidity has(honistly, i'm talking from memory) maybe we will see it on OBD-8 or something