A/C compressor control
A/C compressor control |
A/C compressor engagement is controlled by functions in DICE as well as PSG 16. The following description applies to the functions in PSG 16.
The A/C compressor function comprises two sub-functions
- |
logic function
|
- |
control function
|
Logic function
The logic function determines when the A/C compressor should be turned off. This is performed so that the A/C compressor can be turned off under certain driving conditions when maximum engine torque must be available.The A/C compressor is turned off under the following conditions
- |
Engine coolant temperature above 123° C (253° F)
|
- |
Pedal position sensor value greater than 95% and engine speed < 2500 rpm while in first gear
|
- |
Engine speed < 600 rpm
|
Control function
The control function turns the A/C relay on and off when commanded by the logic function.Once the final stage control has amplified the signal, pin K30 will be grounded and the A/C relay powers the A/C compressor electromagnetic clutch.