Idle automated A/C system

Details Idle automated A/C system Idle automated A/C system

1994-07-21

1995-11-14

Tanner, Harry B.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62184, 62243, 236 35, 123 4112, F01P 500, F25B 3904

Patent

active

054655897

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.

REFERENCES:
patent: 4222353 (1980-09-01), Abe et al.
patent: 4425766 (1984-01-01), Claypole
patent: 4488410 (1984-12-01), Seiderman
patent: 4546742 (1985-10-01), Sturges
patent: 4590772 (1986-05-01), Nose et al.
patent: 4651922 (1987-03-01), Noba
patent: 5018484 (1991-05-01), Naitoh
patent: 5186015 (1993-02-01), Roehrich et al.
"International Electrical Circuit Diagrams--9300,9400" Navistar International Transportation Corp. No. 108757-Ri, Jan. 1992, p. 87.
"Electrical Circuit Diagrams--2000, 4000, 7000, 8000" Navistar International Transportation Corp. No. 1087515-R1, Jan. 1991, p. 124.

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