A chemical delivery assembly for use in a vehicle wash system includes a chemical delivery device with a piston including a one-way valve and a drive mechanism with a drive shaft joined to the piston. A flow sensor and a control system communicatively coupled thereto are also integrated into the assembly. The control system uses information from the flow sensor to control chemical dispensing by causing the drive mechanism to operate to dispense chemical, while the one-way valve is in a closed state resulting in a corresponding amount of the chemical to the amount dispensed being drawn into the chemical chamber from an inlet via a chemical supply. The control system causes the drive mechanism to reset the piston, while the one-way valve is in an open state resulting in the chemical drawn in from the chemical supply being transmitted through the one-way valve for subsequent dispensing.

A chemical delivery assembly for use in a vehicle wash system includes a chemical delivery device including a one-way valve and a drive mechanism with a piston arranged in a chemical chamber, and a loading valve coupled to a chemical outlet by a fluid tight connection, which also includes a dispensing nozzle for dispensing chemical into motive fluid. Actuation of the drive mechanism causes the one-way valve to close to prevent passage of chemical therethrough and the piston to dispense pressurized chemical from the chemical chamber resulting in the pressurized chemical being delivered to a chemical priming cavity of the loading valve, which chemical is dispensed from the dispensing nozzle upon reaching a predefined pressure threshold. During resetting of the piston by the drive mechanism, the one-way valve is open and permits the chemical within the chemical chamber to pass therethrough such that the chemical can be subsequently dispensed.

A vehicle wash assembly for distribution of fluids at a vehicle wash location includes a vehicle wash component operable to dispense fluid into a fluid line for application onto a vehicle by a downstream applicator, and an inlet or outlet of the vehicle wash component is associated with a port configured with an adjustable effective orifice area. A control system receives instructions corresponding to timing information, a target flow rate and/or a target volume of the fluid to be dispensed from the outlet, analyzes the instructions, and generates separate instructions that differ from those received. The separate instructions include a time for when the vehicle wash component is to be actuated, a duration of operation upon actuation, and an effective orifice area of the port. Upon transmission, the separate instructions cause the vehicle wash component to dispense the fluid according to such instructions during a dispensing operation.

A vehicle wash assembly includes a chemical delivery device, a motive fluid delivery device, a mixing site fluidly coupled thereto for mixing dispensed chemical and motive fluid to form a mixture, and a control system integrated into the vehicle wash assembly and communicatively coupled to the chemical and fluid delivery devices, which causes a drive mechanism of the chemical delivery device to dispense chemical from the chemical outlet, and a valve of the motive fluid delivery device to dispense the motive fluid from the motive fluid outlet. The control system receives instructions for operation of the vehicle wash assembly, and in response, the analyzes the instructions, generates separate instructions for operating the chemical delivery device and the fluid delivery device based on the analysis, and transmits the separate instructions to cause the chemical delivery device and the fluid delivery device to operate according to the separate instructions.

A spray device (A) according to the present disclosure includes: a two-fluid nozzle (11) which sprays a mist (91); a spray-device-side gas flow path (12) for supplying a gas to the two-fluid nozzle (11); a gas supply source (17) which supplies the gas to the spray-device-side gas flow path (12); a spray-device-side liquid flow path (13) for supplying a liquid to the two-fluid nozzle (11); a liquid supply source (18) which supplies the liquid to the spray-device-side liquid flow path (13); a pulse-driven liquid flow control valve (14) having a valve opening degree that is adjusted according to a pulse signal to control the flow rate of the liquid in the spray-device-side liquid flow path (13); and a controller (30) which adjusts, in multiple levels, the concentration of the mist (91) sprayed from the two-fluid nozzle 11 by adjusting the valve opening degree of the liquid flow control valve 14.

A localized product injection system includes a composite boom tube having a carrier fluid passage within a tube body, and at least one injection product passage within the tube body isolated from the carrier fluid passage. A plurality of port stations are provided at locations along the tube body. Each of the port stations includes a carrier fluid outlet port and at least one injection product outlet port. A localized injection interface is coupled at a port station. The injection interface includes a carrier fluid input coupled with the carrier fluid outlet port, and at least one injection product input coupled with the at least one injection product outlet port. The injection interface includes at least one throttling element in communication with the at least one injection product input, a mixing chamber, and an injection port configured for localized coupling and injection to a product dispenser.

A chemical delivery device for use in a vehicle wash system includes a chemical delivery device with a chemical chamber having an inlet, an outlet, and a one-way valve, and a drive mechanism with a drive shaft joined to a piston in the chemical chamber. Upon the drive mechanism driving the piston in a dispensing direction, the one-way valve is closed and chemical in the chemical chamber is pressurized and the piston causes the pressurized chemical to be dispensed from the outlet, e.g., to a vehicle wash component, and during dispensing, a vacuum is created in the chemical chamber such that a corresponding amount of the chemical to an amount dispensed is drawn into the chemical chamber from a chemical supply via the chemical inlet. Upon the drive mechanism retracting the piston in a resetting direction, the one-way valve is open and permits passage of fluid therethrough for subsequent dispensing.