A water spraying system includes an engine, a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure, a sprayer fluidly coupled to the pump outlet, the sprayer including a flow res
A water spraying system includes an engine, a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure, a sprayer fluidly coupled to the pump outlet, the sprayer including a flow restriction valve and a trigger for manipulating the flow restriction valve so that movement of the trigger selectively opens and closes the flow restriction valve, a flow sensor configured to sense a flow of water into the pump, and a controller coupled to the flow sensor. The controller is configured to turn off the engine following a set time period of sensed flow below a threshold flow.
대표청구항▼
1. A water spraying system comprising: an engine;a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure;a sprayer fluidly coupled to the pump outlet, the sprayer including a flow
1. A water spraying system comprising: an engine;a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure;a sprayer fluidly coupled to the pump outlet, the sprayer including a flow restriction valve and a trigger for manipulating the flow restriction valve so that movement of the trigger selectively opens and closes the flow restriction valve;a flow sensor configured to sense a flow of water into the pump;a controller coupled to the flow sensor, wherein the controller is configured to activate the pump by starting the engine when the sensed flow is above a threshold flow, and wherein the controller is configured to turn off the engine following a set time period of sensed flow below the threshold flow; anda user interface coupled to the controller, the user interface configured to receive input for adjustment of the threshold flow. 2. The water spraying system of claim 1, wherein the flow sensor is located proximate the pump inlet. 3. The water spraying system of claim 1, wherein the controller is further configured to idle the engine when the sensed flow is below the threshold flow. 4. The water spraying system of claim 1, further comprising: a pressure sensor located between the water source and the pump, the pressure sensor configured to sense a pressure of water provided to the pump. 5. The water spraying system of claim 1, wherein the threshold flow is greater than zero. 6. The water spraying system of claim 1, further comprising: a manually-operated on/off switch configured to prevent activation of the pump when in an off position. 7. A water spraying system comprising: an engine;a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure;a sprayer including a flow restriction valve and a trigger for manipulating the flow restriction valve so that movement of the trigger selectively opens and closes the flow restriction valve;a hose fluidly coupling the pump outlet to the sprayer;a sensor configured to sense a water flow state, the sensor located proximate the pump inlet; anda controller coupled to the sensor, wherein the controller is configured to activate the pump by starting the engine when the sensed water flow state indicates a positive flow condition, and wherein the controller is configured to turn off the engine when the sensed water flow state indicates a no-flow condition for a set time period. 8. The water spraying system of claim 7, wherein the sensor is configured to sense a water flow rate. 9. The water spraying system of claim 7, wherein the sensor is configured to sense a water pressure. 10. The water spraying system of claim 7, wherein the sensor is configured to sense a water flow rate and a water pressure. 11. The water spraying system of claim 7, wherein the sensor is configured to sense the water flow state into the pump. 12. The water spraying system of claim 11, wherein the sensor is configured to sense a water flow rate. 13. The water spraying system of claim 11, wherein the sensor is configured to sense a water pressure. 14. The water spraying system of claim 11, wherein the sensor is configured to sense a water flow rate and a water pressure. 15. A pressure washer comprising: an engine;a pump driven by the engine, the pump including a pump inlet configured to be fluidly coupled to a water source and a pump outlet providing water at an increased water pressure;a sprayer including a flow restriction valve and a trigger for manipulating the flow restriction valve so that movement of the trigger selectively opens and closes the flow restriction valve;a hose fluidly coupling the pump outlet to the sprayer;a flow sensor configured to sense a flow of water provided to the pump; anda controller coupled to the flow sensor, wherein the controller is configured to activate the pump by starting the engine when the sensed flow indicates a positive flow condition, and wherein the controller is configured to turn off the engine following a set time period of sensed flow at a no-flow condition. 16. The pressure washer of claim 15, wherein the flow sensor is located proximate the pump inlet. 17. The pressure washer of claim 15, further comprising: a pressure sensor located between the water source and the pump, the pressure sensor configured to sense a pressure of water provided to the pump.
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