Pressure washers use high pressure liquid, typically water, to clean surfaces such as driveways, decks, walls, and the like. Generally, pressure washers include an engine that provides power to a pump. The pump operates to provide high pressure fluid to a wand or a gun that includes a trigger mechanism that is actuated by the user to discharge the high pressure fluid. Generally, the user squeezes the trigger with one hand and supports the discharge end of the gun with the other hand during use. During periods when high-pressure water is not required, the user releases the trigger and high-pressure water from the pump discharge is directed back to the pump intake.
Embodiments of the present disclosure relate to pressure washers that are powered by an engine and a pump. More specifically, the present disclosure relates to controlling and regulating engine activity and performance, such as the engine's revolutions per minute (“RPM”). In certain embodiments, the present disclosure provides one or more controls for an engine that provides power for a pressure washer, wherein the one or more controls monitor various parameters, such as vacuum pressure, water temperature, and water pressure.
In certain embodiments, various sensors are employed to automatically control a system. At least one sensor feedback is provided to the control system and automatically set the RPM and/or other machine parameters. The operator can utilize the auto control, or manually override to return to manual control. Using a pressure transducer or similar sensor to monitor a water pressure within a pressure washer and a vacuum gauge or similar device to monitor a vacuum pressure within an engine of a pressure washer device, the control system provides constant or systematic monitoring of engine and pump parameters that indicate usage or non-use of pressure washing activities. For example, when a water trigger is depressed on the tool, a signal is sent back to the system control(s) to initiate a return of the engine to working RPM ranges. The present disclosure contemplates various embodiments wherein at least one sensor is provided to monitor and control at least one device parameter. In certain embodiments, devices are provided that do not comprise an on-board ECU (electronic control unit) wherein automatic control of a manual idle throttle can be achieved with the addition of an actuator controlled by the main control system.
In various embodiments, at least one display or user interface is provided on a pressure washer device to provide direct feedback of device settings to the operator. Such settings include, for example, RPM, temperature, pressure and various other measurements and diagnostics related to system performance. Using one or more sensors, embodiments of the present disclosure electronically transmit (via wire or wirelessly) information to a display provided locally on the device, such as on the spray gun or wand, or at a remote location (e.g. truck, office, etc.).
In certain other embodiments, an external device is provided and adapted to control device parameters. Such external devices include, but are not limited to smartphones, tablets, and PCs. Such embodiments provide for automatic and/or manual control of a device without a need for direct contact with a device. Such embodiments provide a device with enhanced control and monitoring features. In certain embodiments, smart phone technology is provided to adjust a series of relays to vary engine RPM and various other machine parameters.
U.S. Patent Application Publication No. 2013/0214059 to Gilpatrick et al., which is hereby incorporated by reference in its entirety, discloses a water spraying system including a spray gun with an electronic display and circuitry configured to provide a graphical user interface on the display. Embodiments of the present disclosure contemplate providing such features, including those wherein information related to device operation is conveyed to a user and wherein a user may control device operations via the user interface. U.S. Pat. No. 8,037,844 to Mather et al., which is hereby incorporated by reference in its entirety, discloses a control method and apparatus provided on a spray gun. Embodiments set forth in the present disclosure contemplate incorporating various features of Mather et al., including a graphical user interface on a spray gun and wherein the spray gun comprises means to control the function(s) of a related device. U.S. Patent Application Publication No. 2005/0107896 to Kucera et al. which is hereby incorporated by reference in its entirety provides a remote control system which may be retrofit in existing sprayers. Such features are contemplated by various embodiments of the systems disclosed herein.
U.S. Pat. No. 8,038,413 to Gilpatrick, which is hereby incorporated by reference in its entirety, discloses an idle down controller that is responsive to a drop in pressure at a pump outlet. Such features are contemplated for use in various embodiments of the presently disclosed systems. U.S. Pat. No. 6,648,603 to Dexter et al., which is hereby incorporated by reference in its entirety, discloses an engine idle controller for a pressure washer. Various features of Dexter, including features wherein an engine speed is at least partially controlled by the valve of an associated wand, are contemplated by various embodiments of the disclosed systems. U.S. Pat. No. 5,186,142 to Brunelli et al., which is hereby incorporated by reference in its entirety, discloses an idling system with a speed governor comprising an electromagnet that interacts with a governor lever arm. Various features of Brunelli are contemplated by various disclosed. U.S. Pat. No. 5,529,460 to Eihusen et al., which is hereby incorporated by reference in its entirety, discloses a pressure washer with a flow control switch and a bypass. Various features of Eihusen, including features wherein a bypass relieves excess outlet pressure and activates a flow control switch, are contemplated for use with the present invention. U.S. Patent Application Publication No. 2013/0092745 to Karp, which is hereby incorporated by reference in its entirety, discloses a pressure washer with a timed controlled wherein the engine or motor is deactivated if the spray gun is not operated for a certain period of time. Such features are contemplated by various embodiments of the disclosed systems.
In one embodiment, a pressure washer device is provided, the device comprising an engine having a throttle responsive to control signals to control an engine speed, a pump in communication with and powered by the engine that discharges a fluid under pressure, a spray gun in communication with the pump for dispensing a fluid, a control unit in communication with the engine, a first sensor in communication with the engine and the control unit, the first sensor adapted to measure a vacuum pressure associated with the engine, a second sensor in communication with the pump and the control unit, the second sensor adapted to measure a fluid pressure associated with the pump, and a third sensor in communication with the at least one of the engine and the pump and the control unit, the third sensor adapted to measure a temperature of at least one of: the engine, a fluid in the pump, and the pump. The control unit is in communication with the engine to control an engine function, and the engine function comprises at least one of engine speed, fuel consumption, and air intake.
In another embodiment, a pressure washer is provided, the pressure washer comprising an engine having a throttle responsive to control signals, a pump in communication with the engine, the pump operative to pressurize a fluid, a dispensing device in fluid communication with the pump, a vacuum sensor in communication with the engine to detect a vacuum pressure within the engine, a pressure sensor in communication with the engine to detect a fluid pressure within the pump, and a control unit in communication with the vacuum sensor, the pressure sensor, and the throttle. The control unit is adapted to receive and process signals from the vacuum sensor and the pressure sensor and send signals to the throttle to control at least one engine function.
In various embodiments, the present disclosure provides a pressure washer comprising a dispensing device such as a spray gun or wand wherein the dispensing device is capable of sending a user-generated signal or command to a control unit of the pressure washer. For example, in certain embodiments, a dispensing device comprises a spray gun capable of sending a signal to a control device when a user conducts a specific operation or input. In some embodiments, the input comprises a predetermined operation (e.g. three pulses of a trigger within a certain timeframe). Such an input provides a signal to the control unit to perform a specific function, such as increase or decrease the speed of the engine. In other embodiments, the dispensing device comprises one or more user-interfaces or contact points to perform specific functions. For example, in certain embodiments, a dispensing device comprises a dedicated button or switch to send a specific signal to the control unit and/or engine. The spray gun may comprise a button or switch to control device functions. In still other embodiments, such control features may be provided external to the device and/or dispensing device. Various embodiments of the present disclosure contemplate providing a remote control device that may be carried by a user or maintained in a utility vehicle, the remote control device adapted to send signals to a control unit of a pressure washer based on user inputs.
In certain embodiments, methods of controlling one or more operating functions of a pressure washer are provided. In one embodiment, a method for automatically controlling operating functions of a pressure washer engine is provided, the method comprising the steps of providing a pressure washer comprising an engine, a pump, and a control unit in communication with the engine and at least one sensor, activating the pressure washer by starting the engine, providing power to the control unit, initializing a loop wherein the control unit continuously monitors the at least one sensor to determine whether a predetermined event has occurred, based on the occurrence of the predetermined event, providing a signal from the control unit to the engine to automatically change at least one operating function of the pressure washer, and subsequent to changing the at least one operating function of the pressure washer, initiating a second loop to continuously monitor the at least one sensor to determine whether a second predetermined event has occurred.
In various embodiments of the present disclosure, a method of operating a pressure washer device is provided. In one embodiment, a method is provided comprising the steps of: powering on a pressuring washing device; selectively powering on or otherwise activating an auto-idle feature of the device and thereby initiating a program and beginning a counter. In various embodiments, the counter comprises a seven-second counter, but it will be recognized that the specific duration of the counter is not critical to the disclosure and any number of durations for the counter may be provided. Once the limit of the counter is reached, a relay contact opens and the device idles down from a working speed to an idle speed. The device, system, or program then enters a loop wherein at least a water pressure within the device is monitored. During the loop, if a 25% or greater change in water pressure is identified (such as may occur when a water trigger is activated and/or cleaning operations are commenced), the relay contact is closed and the engine idle speed is returned to a normal or working speed. Once the device has returned to the normal or working idle speed, a loop is initiated to monitor at least one of water pressure within a pump and vacuum pressure within an internal combustion engine provided within the device. In certain embodiments, if a water pressure change of at least approximately fifteen percent is perceived by the device and less than approximately twenty percent change in vacuum pressure is perceived, the counter will continue to increment. In this condition, the device has recognized that cleaning operations are occurring or have recently occurred and engine conditions (RPM, power, etc.) should be maintained. If a vacuum pressure change is at least approximately twenty-five percent or more, the counter is reset to zero, as such a condition is generally indicative of continued use of the device and/or continued pressure washing activities. If the counter reaches a duration of at least approximately twenty seconds without pressure sensor devices indicating that cleaning operations or use of the device has occurred within this period, the contact relay opens and the machine idles down. In various embodiments, the device is returned to normal working conditions by simply activating a fluid-dispensing device and thereby inducing a pressure and/or vacuum change to indicate that normal operations should be resumed. Additionally, in certain embodiments, the device may be manually activated to reduce engine idle. In one embodiment, for example, three quick pulses of a trigger mechanism send a signal to open the relay and idle-down the engine. The three pulses should preferably occur within a short time frame (1-2 seconds, for example). Additionally, various embodiments of the present disclosure contemplate that the auto-idle features as shown and described herein need not be used, and may be over-ridden or turned-off when desired. Although various embodiments described prescribe certain values for certain conditions to exist, it will be recognized that no limitation with respect to such values is provided. Such values are provided as illustrative of certain embodiments, and the present disclosure is not limited to such values.
To assist in the understanding of the present disclosure the following list of components and associated numbering found in the drawings is provided herein:
Referring now to
The pressure washer 100 of the depicted embodiment comprises a hand movable mobile pressure washer that includes a trigger-actuated gun, wand, or tool, simply referred to as gun 2. Pressure washer 100 also comprises an internal combustion engine 4 and a pump 6 mounted to a chassis or frame 7. The frame 7 comprises at least one wheel 9 to facilitate movement of the device 100. The device 100 comprises an engine 4 that drives a pump 6. The pump 6 draws fluid, typically water, from a source (e.g., an onboard reservoir, a garden hose, an external tank, etc.) and selectively delivers the fluid to the gun 2 via a hose 8, under pressure. The gun 2 includes trigger assembly 10 that allows a user to selectively discharge a flow of water from the gun 2. Typically, a user actuates the trigger assembly 10 to open a valve (not shown) and begin the discharge of high-pressure fluid. When the user disengages trigger assembly 10, the valve closes, and fluid flow is inhibited from exiting the gun 2.
The side tanks 20 are spaced apart from each other and define between them an accommodation space which is covered by a vented panel 30. A heater module 32 is provided and carried by a sub-frame 34 mounted on the main frame 12 by means of sliding, telescoping rails 36 which enable the heater module 32 to be moved between an access position shown in
Also visible in
In various embodiments, the microprocessor control unit 58 is in communication with at least one transducer 60, the transducer 60 being capable of monitoring at least one water pressure within the system. The control unit 58 is also provided in communication with at least one temperature sensor 62 (e.g. thermocouple), and/or a vacuum gauge 64. The transducer 60, temperature sensor 62, and vacuum gauge 64 may be electrical devices, mechanical devices, or electro-mechanical devices, as will be recognized by one of ordinary skill in the art. The microprocessor control unit 58 monitors one or more system parameters, and based on information received from one or more sensors 60, 62, 64 related to one or more parameters, the control unit 58 regulates engine function(s), such as RPM and other machine parameters. Such control is advantageous in order to save fuel, reduce emissions, control noise output and maintain a desirable pressure associated with a fluid, for example. By utilizing the various sensors, individually or in combination with each other, the pressure washer may be automatically controlled. An operator is not required to be near the unit or otherwise monitor and control the unit. The sensor feedback to microprocessor control unit 58 allows microprocessor control unit 58 to send signals to speed control relay 66 and speed control switch 68 to automatically set the RPM and other machine parameters. An operator can utilize the auto control, or manually override to return to manual control.
Using a water transducer 60 to monitor water pressure and/or a vacuum gauge 64 to monitor vacuum pressure, the microprocessor control unit 58 of certain embodiments is provided to monitor changes (or lack thereof) in at least one of water pressure within the device and vacuum pressure within the engine (e.g. manifold vacuum pressure) in order to automatically adjust device functioning (e.g. engine RPM). When pressure washer functions are activated or deactivated, such as by pressing or releasing a trigger assembly of the spray gun, a signal is provided to microprocessor control unit 58 indicating such an event, and engine functioning (e.g. RPM) is adjusted accordingly. Although
As also shown in
Referring now to
If it is determined at decision step 414 that the activation event or signal (e.g. three quick pulses) of the water trigger has not occurred within a predetermined timeframe, then control passes to decision step 418. If decision step 418 determines that there is less than a 15% change in water pressure and/or less than a 20% change in vacuum pressure, thereby indicating that pressure washing activities are continuing, then the counter in step 420 will increment and control loops back to decision step 418. Such a situation indicates that a change in use of the device has not occurred.
If the determination in decision step 418 is that the condition has not occurred (i.e. the result is “no”), thus indicating that washing functions have changed and an alteration to engine speed or power may need to be made, then control passes to decision step 422 to determine if an change of appropriate magnitude has occurred. In the depicted embodiment, step 422 determines if a vacuum pressure delta is greater than 30% and/or if the water pressure delta is greater than 25%. If such conditions exist, thereby indicating that the change is device usage is significant, the process advances to step 424 and the counter is reset to zero and control loops back to decision step 418. In this manner, the counter or loop is reset and the engine function continues as normal and the method continues to monitor for a state of inactivity or reduced usage. If decision step 422 indicates that a change in water pressure and/or vacuum is not significant enough to merit continued engine functioning to support washing operations, decision step 426 then determines if the counter has reached a limit, which in one embodiment is approximately twenty seconds. The count frequency, and thus, the elapsed time in seconds, can be varied to be greater than or less than twenty seconds based upon operating conditions desired. If a condition is not met within the predetermined time, control loops back to decision step 418 and normal or working engine functioning is maintained.
As shown and described, a process of monitoring of pressure washing functions comprises decision steps 418 and 422. As long as water pressure and/or vacuum pressure remain substantially unchanged in step 418, a counter will continue to increment (step 420). If the counter reaches a certain predetermined value without the system having registered an appropriate change in water pressure or vacuum pressure, a control unit may automatically adjust engine function. If water pressure and/or vacuum pressure changes fail to remain below a certain threshold (“no” in step 418), the system then monitors whether or not the changes in such criteria are greater than predetermined values. If the changes are greater than the predetermined values (“yes” in step 422), thus indicating that the device is in use, the counter is reset at step 424 and the loop continues. If the changes are not greater than the predetermined values (“no” at step 422), thus indicating that the device is generally not in use, and the counter has reached a limit (“yes” in step 426), the system recognizes that changes indicative of use have not occurred within a set time period and the device or system functioning is automatically adjusted or idled-down.
If step 426 determines that the condition has been met, the process advances to step 428 wherein the contact to the relay opens and the power washer idles down. The depicted process then advances to decision step 430, wherein the device may be completely powered down or the auto-idle control may be overridden. If the device is powered-down, the process reaches a conclusion. If an over-ride is selected, control loops back to decision step 410 of
Although
Although various system embodiments are contemplated as providing vacuum, water, and temperature sensors, it will be recognized that the present invention is not limited to such devices. Indeed, various other means for sensing various other parameters may be utilized in described embodiments, either in combination with or in lieu of the sensors described herein.
This U.S. Non-Provisional Patent Application claims the benefit of priority from U.S. Provisional Patent Application 61/984,623, filed Apr. 25, 2014, and U.S. Provisional Patent Application 61/985,915, filed Apr. 29, 2014, the entire disclosures of which are hereby incorporated by reference in their entireties.
Number | Name | Date | Kind |
---|---|---|---|
5046665 | Kor et al. | Sep 1991 | A |
5081973 | Minamitani | Jan 1992 | A |
5186142 | Brunelli | Feb 1993 | A |
5228622 | Murphy | Jul 1993 | A |
5282722 | Beatty | Feb 1994 | A |
5383605 | Teague | Jan 1995 | A |
5529460 | Eihusen et al. | Jun 1996 | A |
5580221 | Triezenberg | Dec 1996 | A |
5848877 | Dill | Dec 1998 | A |
5871152 | Saney | Feb 1999 | A |
6031352 | Carlson | Feb 2000 | A |
6123509 | Hung | Sep 2000 | A |
6152105 | Nishimura | Nov 2000 | A |
6419456 | Cooper | Jul 2002 | B1 |
6648603 | Dexter | Nov 2003 | B2 |
6651900 | Yoshida | Nov 2003 | B1 |
7422164 | Matsumoto | Sep 2008 | B2 |
8037844 | Mather et al. | Oct 2011 | B2 |
8038413 | Gilpatrick | Oct 2011 | B2 |
8135529 | Liao | Mar 2012 | B2 |
8425203 | Gardner | Apr 2013 | B2 |
8459958 | Renner | Jun 2013 | B2 |
8496188 | Linton | Jul 2013 | B2 |
8616180 | Spitler | Dec 2013 | B2 |
8662857 | Hukriede | Mar 2014 | B2 |
8726882 | Raasch | May 2014 | B2 |
8905152 | Kling | Dec 2014 | B2 |
8915231 | Raasch | Dec 2014 | B2 |
9051927 | Gilpatrick | Jun 2015 | B2 |
9316216 | Cook | Apr 2016 | B1 |
20020035868 | Muto | Mar 2002 | A1 |
20050107896 | Kucera et al. | May 2005 | A1 |
20080014096 | Gilpatrick | Jan 2008 | A1 |
20110052415 | Renner | Mar 2011 | A1 |
20110189032 | Hukriede | Aug 2011 | A1 |
20110315176 | Gilpatrick | Dec 2011 | A1 |
20120020809 | Gilpatrick | Jan 2012 | A1 |
20120169504 | Hillger et al. | Jul 2012 | A1 |
20130092745 | Karp | Apr 2013 | A1 |
20130111865 | Hansen et al. | May 2013 | A1 |
20130193231 | Mologousis | Aug 2013 | A1 |
20130214059 | Gilpatrick et al. | Aug 2013 | A1 |
20130216402 | Raasch | Aug 2013 | A1 |
20130277451 | Gilpatrick | Oct 2013 | A1 |
20140231537 | Hukriede | Aug 2014 | A1 |
20160067726 | Gilpatrick | Mar 2016 | A1 |
Number | Date | Country |
---|---|---|
102500492 | Jun 2012 | CN |
202799823 | Mar 2013 | CN |
WO 2012013574 | Feb 2012 | WO |
Entry |
---|
“EHW: All-Electric Hot Water Pressure Washer,” Landa, Jun. 2011, 2 pages. |
“Encore XT Manual Powder Spray System,” Nordson Corporation, Oct. 2011, 4 pages [Retrieved on Oct. 13, 2013 from http://www.nordson.com/en-gb/divisions/industrial-coating/Literature/Powder%20Coating/Encore%20XT%20English%202011.pdf]. |
“G 4000 OH 4000psi gas Pressure Washer,” Karcher, 2013, 2 pages [retrieved from: http://www.buykarcher.com/product_detail.asp?HDR=GASPWPROF&T1=KAR+11948010]. |
“Hydroblaster™ Remote Equipment Module (REM),” Hydro Engineering, Inc., Jun. 2010, 1 page. |
“Pressure Washer Remote Control Stations,” Hydro Engineering, Inc., © 2004, 3 pages [retrieved from: http://www.hydroblaster.com/products/RemoteStations.htm]. |
“Pressure Washers are operated by wireless remote control.” ThomasNet, Nov. 21, 2006, 3 pages [retrieved from: http://news.thomasnet.com/fullstory/Pressure-Washers-are-operated-by-wireless-remote-control-499867]. |
“Pro-Control: Product Information Bulletin,” Hydro-Chem Systems, Inc., Dec. 2006, 1 page. |
“Pro Control Pressure Washer Remote System,” Hydro-Chem Systems, Inc., © 2006, 1 page [retrieved from: http://hydrochemsystems.com/services.22.139.pro_control_pressure_washer_remote_system.htm]. |
“Remote control operates pressure washers at a distance,” FoodProduction Daily, Nov. 2006, 4 pages [retrieved from: http://www.foodproductiondaily.com/Processing/Remote-control-operates-pressure-washers-at-a-distance]. |
“SEA: Stationary, electric-Powered, Cold Water Pressure Washer,” Landa, Nov. 2014, 2 pages [Retrieved on Oct. 11, 2013 from http://landanw.com/media/SEA.pdf]. |
“Spartan Warrior Water Jet Owners Manual,” Spartan Tool L.L.C., 2011, 92 pages [retrieved from: http://www.spartantool.com/filebin/productmanual/Warrior_Manual_5-17-11.pdf]. |
“Truck mount with remote controlled start and shut down.” TruckMountForums, Nov. 2012, 42 pages. |
“Wireless remote systems,” PressureNet, 2007, 5 pages [retrieved from: http://www.pressurenet.net/forum/index.php?showtopic=920]. |
McCormick “Hydroblaster™ Model MultiBlaster (In Plant Multi-station Controller),” Hydrro Engineering, Inc., Aug. 2007, 1 page. |
Number | Date | Country | |
---|---|---|---|
20150306614 A1 | Oct 2015 | US |
Number | Date | Country | |
---|---|---|---|
61984623 | Apr 2014 | US | |
61985915 | Apr 2014 | US |