Patent ID: 8333845

Claim:
A system for cleaning a stationary vehicle where the system moves with respect to the stationary vehicle, comprising: a frame structure, including at least an overhead section, said frame structure having an entrance side and an exit side; a plurality of guide rails in communication with said frame structure to allow said frame structure to linearly reciprocate over the vehicle; a first entrance fluid delivery device located on said frame structure in a half adjacent said entrance side; a first exit fluid delivery device located on said frame structure in a half adjacent said exit side; said first entrance fluid delivery device and said first exit fluid delivery device each being in communication with a first fluid type; a second entrance fluid delivery device located on said frame structure in a half adjacent said entrance side and a second exit fluid delivery device located on said frame structure in a half adjacent said exit side each in communication with a second fluid type, wherein said first fluid type is different than said second fluid type; a control system in communication with each of said first and second entrance fluid delivery devices and said first and second exit fluid delivery devices to selectively and independently control the flow of fluid through each of said first and second entrance fluid delivery devices and said first and second exit fluid delivery devices; wherein said control system selectively emits said first fluid type from either said first entrance fluid delivery device or said first exit fluid delivery device during a pass of said frame in either direction thereof and selectively emits said second fluid type from either said second entrance fluid delivery device or said second exit fluid delivery device during the same pass of said frame in either direction thereof; wherein said control system is configured to emit fluid from one of said first entrance fluid delivery device or said second entrance fluid delivery device simultaneously with fluid from one of said first exit fluid delivery device or said second exit fluid delivery device in order to limit the number of passes of said frame structure over the vehicle.