Abstract: A ratio controller includes a housing defining a mixing chamber. The housing has a water inlet configured to receive water from a water supply, an agent inlet configured to receive agent from an agent supply, an outlet configured to output an agent-water solution, a first pressure port extending through a sidewall of the housing at a first position proximate the water inlet, and a second pressure port extending through the sidewall of the housing at a second position proximate the mixing chamber.

Abstract: A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

Abstract: A vehicle system for a vehicle includes a controller. The controller is configured to transmit a first control signal to a transmission device of the vehicle to engage a first mode of the transmission device, acquire information regarding a pressure of an inlet flow of water received by a pumping system of the vehicle, and transmit a second control signal to the transmission device to engage a second mode of the transmission device based on the information.

Abstract: A vehicle system for a vehicle includes a controller. The controller is configured to transmit a first control signal to a transmission of the vehicle to engage a first gear of the transmission, acquire information regarding a pressure of an inlet flow of water received by a pumping system of the vehicle, and transmit a second control signal to the transmission to engage a second gear of the transmission based on the information.

Abstract: A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

Abstract: A fire apparatus includes a fluid delivery system having a water circuit, an agent circuit, and a ratio controller. The water circuit includes a water pump configured to pump water from a water source through the water circuit. The agent circuit includes an agent tank configured to store an agent, an agent pump configured to pump the agent through the agent circuit, and an agent metering valve positioned to variably restrict a flow of the agent therethrough. The ratio controller is positioned to receive the water and the agent. The ratio controller is configured to provide an agent-water solution to one or more outlets. The agent metering valve is a self-adjusting metering valve having a valve controller configured to adjust at least one of an orifice size and a valve position based on a water flow rate entering the ratio controller and a preselected agent-to-water ratio for the agent-water solution.

Abstract: A vehicle system for a vehicle includes a controller. The controller is configured to transmit a first control signal to a transmission of the vehicle to engage a first gear of the transmission, acquire information regarding a pressure of an inlet flow of water received by a pumping system of the vehicle, and transmit a second control signal to the transmission to engage a second gear of the transmission based on the information.

Abstract: A vehicle includes an engine, a transmission coupled to the engine, a pumping system selectively coupled to the engine by the transmission, and a controller. The pumping system is configured to receive an inlet flow of water from a water source. The controller is configured to receive an indication regarding a pressure of the inlet flow of water and transmit a control signal to the transmission to change a gear of the transmission based on the indication regarding the pressure of the inlet flow of water.

Abstract: A vehicle includes an engine, a transmission coupled to the engine, a pumping system selectively coupled to the engine by the transmission, and a controller. The pumping system is configured to receive an inlet flow of water from a water source. The controller is configured to receive an indication regarding a pressure of the inlet flow of water and transmit a control signal to the transmission to change a gear of the transmission based on the indication regarding the pressure of the inlet flow of water.

Abstract: A response vehicle includes an engine, a transmission coupled to the engine, a pumping system operatively engaged with the transmission and thereby configured to at least selectively receive mechanical energy generated by the engine via the transmission, and a central controller communicably coupled to the engine, transmission, and pumping system. The pumping system has an input configured to interface with a water source and receive an inlet flow of water. The central controller is configured to receive an indication regarding the pressure of the water at the input of the pumping system, and transmit a control signal to the transmission to change an effective gear ratio of the transmission while the transmission is operably coupled to the pumping system based on the received indication regarding the pressure of the water at the input of the pumping system.

Abstract: A fire apparatus includes a fluid delivery system having a water circuit, an agent circuit, and a ratio controller. The water circuit includes a water pump configured to pump water from a water source through the water circuit. The agent circuit includes an agent tank configured to store an agent, an agent pump configured to pump the agent through the agent circuit, and an agent metering valve positioned to variably restrict a flow of the agent therethrough. The ratio controller is positioned to receive the water and the agent. The ratio controller is configured to provide an agent-water solution to one or more outlets. The agent metering valve is a self-adjusting metering valve having a valve controller configured to adjust at least one of an orifice size and a valve position based on a water flow rate entering the ratio controller and a preselected agent-to-water ratio for the agent-water solution.

Abstract: A response vehicle includes an engine, a transmission coupled to the engine, a pumping system operatively engaged with the transmission and thereby configured to at least selectively receive mechanical energy generated by the engine via the transmission, and a central controller communicably coupled to the engine, transmission, and pumping system. The pumping system has an input configured to interface with a water source and receive an inlet flow of water. The central controller is configured to receive an indication regarding the pressure of the water at the input of the pumping system, and transmit a control signal to the transmission to change an effective gear ratio of the transmission while the transmission is operably coupled to the pumping system based on the received indication regarding the pressure of the water at the input of the pumping system.