| 摘要 |
A vehicle central tyre inflation system (CTIS) comprises: reservoir 16 for supplying air to tyres 12a-d; pressure sensor 20 for monitoring reservoir air pressure Pr; compressor 22 for supplying compressed air along a first path 24 to the reservoir; timer 26 for monitoring the run-time of the compressor; dryer 36 on the first path for drying air from the compressor; purging system 30 for routing air through the dryer along a second path 34 to purge liquid from the dryer; and a controller controlling the air flow in the CTIS. The controller is configured: to activate the compressor to supply air along the first path to the reservoir in response to a compressor request, after which the reservoir air is at a post-operation pressure; when the compressor operation is complete, to determine if the compressor activation period Tc is greater than / equal to a target period Tt; and if Tc is less than Tt, to keep the compressor activated until Pr increases to a base target pressure greater than the post-operation pressure: and if Tc is greater than / equal to Tt, to keep the compressor activated until Pr increases to an elevated target pressure higher than the base target pressure and to activate the purging system to route air along the second path. |
