Idle automated A/C system
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United States of America Patent
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Nov 14, 1995
Issued Date -
N/A
app pub date -
Jul 21, 1994
filing date -
Sep 7, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When the driver parks a truck for the purpose of sleeping in the cab's bunk space and desires to have the air conditioner operate, fan clutch cycling, which may create objectionable noise that disturbs sleep, is avoided by the inclusion of a branch circuit off of the air conditioner switch that comprises a parking brake switch in series with a relay coil. When the air conditioner is on and the parking brakes are set, this relay coil is energized to open a circuit to the engine fan clutch solenoid, preventing the fan clutch from being disengaged, and thereby keeping the fan in driven relation to the engine crankshaft so that fan clutch cycling does not occur.
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