Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 1 of 7 PageID #: 24059
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`Exhibit 83
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`Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 2 of 7 PageID #: 24060
`
`United States Patent
`Killion et al.
`
`(io) Patent No.:
`(45) Date of Patent:
`
`US 9,371,618 B2
`Jun. 21, 2016
`
`US009371618B2
`
`8,668,274 B2
`2004/0036346 Al
`2004/0211092 Al
`2009/0052987 Al
`2010/0085185 Al*
`
`3/2014
`2/2004
`10/2004
`2/2009
`4/2010
`
`2011/0293368 Al
`2014/0061329 Al*
`
`12/2011
`3/2014
`
`2014/0191560 Al
`
`7/2014
`
`Gaertner et al.
`Johannes Klaasse
`Barnes
`Hall et al.
`Nielsen ..................... G01V3/15
`340/540
`
`Erdmann et al.
`Ngo ........................... B05B 9/06
`239/11
`
`Gaertner et al.
`
`FOREIGN PATENT DOCUMENTS
`
`CN
`CN
`CN
`WO
`
`202157264 U
`3/2012
`202247649 U
`5/2012
`103696350 A
`4/2014
`WO 02/095144 Al
`11/2002
`OTHER PUBLICATIONS
`
`Atlas Copco, “Dynapac Compact Planers: Dynapac PL350, PL500
`and PL1000,” product brochure, 12 pp.
`
`* cited by examiner
`
`Primary Examiner — Adam Alharbi
`(74) Attorney, Agent, or Firm — Leydig, Voit & Mayer, Ltd.
`
`(57)
`ABSTRACT
`A system and method for operating a cold planer includes a
`method for operating a cold planer. In a method, a signal
`indicative of an operating state is used to determine an oper­
`ating condition, which is a basis for deciding which spray
`banks from a plurality of spray banks should be activated.
`Thereafter, a water flow required to operate the spray banks is
`estimated and a pump command signal is determined. The
`pump is operated and a water pressure in a main manifold is
`monitored such that the pump is controlled using a closed-
`loop control scheme that receives the water pressure as feed­
`back to maintain a desired water pressure within the main
`manifold.
`
`20 Claims, 6 Drawing Sheets
`
`100
`
`(12)
`
`(54)
`
`(71)
`
`(72)
`
`(73)
`
`COLD PLANER SPRAY SYSTEM AND
`METHOD
`
`Applicant: Caterpillar Paving Products Inc.,
`Brooklyn Park, MN (US)
`
`Inventors: Daniel H. Killion, Blaine, MN (US);
`Eric S. Engelmann, Delano, MN (US)
`
`Assignee: Caterpillar Paving Products Inc.,
`Brooklyn Park, MN (US)
`
`(*)
`
`Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 128 days.
`
`(21)
`
`(22)
`
`(65)
`
`(51)
`
`(52)
`
`(58)
`
`(56)
`
`Appl.No.: 14/468,070
`
`Filed:
`
`Aug. 25, 2014
`
`Prior Publication Data
`US 2016/0053446 Al Feb. 25, 2016
`
`Int. Cl.
`G06F 7/70
`E01C 23/088
`E01C 23/12
`U.S. Cl.
`CPC .............E01C23/088 (2013.01); E01C23/127
`(2013.01)
`
`(2006.01)
`(2006.01)
`(2006.01)
`
`Field of Classification Search
`None
`See application file for complete search history.
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4,325,580 A 4/1982 Swisher, Jr. et al.
`8,147,164 B2 4/2012 Will etal.
`
`

`

`Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 3 of 7 PageID #: 24061
`
`US 9,371,618 B2
`
`1
`COLD PLANER SPRAY SYSTEM AND
`METHOD
`
`TECHNICAL FIELD
`
`This patent disclosure relates generally to machines and,
`more particularly, to a water spray system for a cold planer
`machine.
`
`BACKGROUND
`
`When resurfacing an asphalt road surface, at least a portion
`of the upper surface of the roadway is milled by specialized
`equipment so a new layer of asphalt can be deposited. The
`milling operation, which can also be referred to as cold plan­
`ing, asphalt milling, or profiling, can be carried out at any
`desired depth depending on the resurfacing operation. Typi­
`cally, a road surface is milled, and the material removed from
`the road is collected for recycling. Material suitable for recy­
`cling is ground and used as aggregate in new pavement.
`Milling operations in general are also used to control heights
`and clearances of other road structures such as curb reveals,
`manhole and catch basin heights, shoulder and guardrail
`heights, overhead clearances and the like in both finished and
`unfinished road surfaces.
`Milling is generally performed by construction equipment
`called milling machines or cold planers. These machines
`typically use a large rotating drum for removing and grinding
`the road surface. The drum is usually enclosed in a housing
`that shields the surroundings from flying debris and contains
`the milled material, which is collected and deposited on a
`conveyor for loading onto a waiting truck. Many cold planers
`use an up-cut configuration, in which the drum rotates in the
`reverse direction to the drive wheel or tracks, which helps
`drive the milled material up and into a conveyor. This con­
`figuration also creates considerable amounts of dust and other
`airborne debris, which can be controlled by various methods
`including water spraying and using vacuum collectors. The
`water sprayed operates to cool the cutting drum and also help
`contain or settle dust. A typical cold planer will carry a water
`reservoir onboard that feeds the water sprays. However, cold
`planers may operate in remote areas where water is not
`readily accessible and must be delivered by truck. Water
`replenishment also requires the machine to stop operation and
`thus increase the time required to complete a project.
`
`SUMMARY OF THE DISCLOSURE
`
`In one aspect, the disclosure describes a cold planer. The
`cold planer includes a frame and a drum enclosed within a
`housing and arranged to rotate about a drum axis. The drum is
`connected to the frame and configured to plane a road surface
`during operation. The cold planer further includes a primary
`rotor chamber spray bank mounted to the frame and disposed
`in the housing, the primary rotor chamber spray bank includ­
`ing a first plurality of spray nozzles arranged along a first
`spray manifold, the first plurality of spray nozzles being
`arranged parallel to the drum axis and being oriented such that
`a plurality of water sprays provided therethrough are directed
`towards the drum. A water reservoir is mounted on the frame
`and configured to enclose and contain water, and a pump is
`fluidly associated with the water reservoir and configured to
`draw the water therefrom, pressurize the water, and provide
`pressurized water to a main spray manifold connected to the
`frame. The pump is configured to pressurize the water to a
`variable pressure in response to a pump signal. A pressure
`sensor is associated with the main spray manifold and con-
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`figured to provide a pressure signal indicative of a pressure of
`the pressurized water within the main spray manifold.
`In one embodiment, a first control valve is fluidly disposed
`between the main spray manifold and the first spray manifold.
`The first control valve selectively fluidly connects the main
`with the first spray manifolds in response to a valve signal. An
`electronic controller is associated with the cold planer and
`configured to receive a plurality of operating signals indica­
`tive of an operating condition of the cold planer. The elec­
`tronic controller is disposed to monitor the plurality of oper­
`ating signals, determine an operating state of the cold planer
`based on the operating signals, and determine whether the
`primary rotor spray bank should be activated based on the
`operating state. The controller is further configured to esti­
`mate an amount of pressurized water that will be required to
`operate the primary rotor spray bank, when it is determined
`that the primary rotor spray bank should be activated, deter­
`mine a desired main spray manifold pressure based on the
`estimated amount of pressurized water, determine the pump
`signal based on the desired main spray pressure, send the
`pump signal to the pump, activate the first control valve by
`sending the valve signal to the first control valve when it is
`determined that the primary rotor spray bank should be acti­
`vated, and maintain the desired main spray manifold pressure
`by adjusting the pump signal based on the pressure signal as
`a primary control parameter continuously during operation.
`In another aspect, the disclosure describes a machine that
`includes a frame and a drum enclosed within a housing and
`arranged to rotate about a drum axis. The drum is connected
`to the frame and configured to plane a road surface during
`operation. The machine further includes a first spray bank
`mounted to the frame, where the first spray bank includes a
`first plurality of spray nozzles arranged along a first spray
`manifold, and where the first plurality of spray nozzles being
`oriented to wet the drum. A water reservoir is mounted on the
`frame, and a pump is fluidly associated with the water reser­
`voir and configured to draw water therefrom. The pump is
`configured to pressurize the water to a variable pressure in
`response to a pump signal, pressurize the water, and provide
`pressurized water to a main spray manifold. A pressure sensor
`is associated with the main spray manifold and configured to
`provide a pressure signal indicative of a pressure of the pres­
`surized water within the main spray manifold. A first control
`valve is fluidly disposed between the main spray manifold
`and the first spray manifold, the first control valve selectively
`fluidly connecting the main with the first spray manifolds in
`response to a valve signal.
`An electronic controller is associated with the cold planer
`and configured to receive a plurality of operating signals
`indicative of an operating condition of the cold planer. The
`electronic controller is disposed to monitor the plurality of
`operating signals and determine an operating state of the cold
`planer based on the operating signals. The controller further
`determines whether the first spray bank should be activated
`based on the operating state, and estimates an amount of
`pressurized water that will be required to operate the first
`spray bank when it is determined that the first spray bank
`should be activated. The controller then determines a desired
`main spray manifold pressure based on the estimated amount
`of pressurized water, determines the pump signal based on the
`desired main spray pressure, and sends the pump signal to the
`pump. The first control valve is activated by sending the valve
`signal to the first control valve when it is determined that the
`first spray bank should be activated. During operation, the
`controller maintains the desired main spray manifold pres­
`sure by adjusting the pump signal based on the pressure signal
`as a primary control parameter.
`
`

`

`Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 4 of 7 PageID #: 24062
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`US 9,371,618 B2
`
`5
`frame 102 in a rearward position relative to a rotation axis 156
`of the drum 118, arranged along the width of the cold planer
`100 parallel to the rotation axis 156, and are oriented such that
`various water sprays are directed towards the drum 118 to wet
`the drum 118. Water provided to the drum 118 through the
`rotor chamber spray bank 200 acts to cool the cutting ele­
`ments of the drum from heat generated during the milling
`operation, and lubricates those cutting elements.
`The cold planer 100 further includes an additional or sec­
`ond rotor chamber spray bank 206, which includes a second
`plurality of spray nozzles 208 arranged in parallel along a
`second spray manifold 210, as shown in FIG. 4. In further
`reference to FIG. 3, the second plurality of spray nozzles 208
`and manifold 210 are mounted on the frame 102 in a rearward
`position and parallel to the first plurality of spray nozzles 202,
`and are oriented such that various water sprays are directed
`towards the drum 118 to augment the water delivery capabil­
`ity of the machine, as required during operation. For example,
`when milling a shallow depth, at a high drum speed, addi­
`tional heat generated by the milling operation may require
`additional water for cooling and lubrication of the cutting
`tools.
`The cold planer 100 further includes a transition spray
`bank 214 that generates water sprays directed towards a drum
`transition region 212 between the drum 118 and the input side
`140 of the intermediate stage conveyor 134, through which
`material is flung from the drum 118 onto the conveyor belt
`136. During operation, water provided to the drum 118
`through the second rotor chamber spray bank 206 acts to
`further cool and lubricate the cutting elements of the drum, as
`well as suppress dust and other airborne particles that may be
`generated in the transition region 212. The transition spray
`bank 214 includes a third plurality of spray nozzles 216 that
`are connected to a third spray manifold 218.
`The cold planer 100 additionally includes an intermediate
`stage conveyor spray bank 220 that generates water sprays
`directed towards the material travelling on the belt 136 of the
`intermediate stage conveyor 134. During operation, operation
`of this spray bank may be optional and used for material that
`is either generating more dust that what can be effectively
`suppressed by the spray banks upstream in the material flow
`direction, and/or material that has been heated by the milling
`operation and requires additional cooling to quench the mate­
`rial and reduce the formation of vapors. The intermediate
`stage conveyor spray bank 220 includes a fourth plurality of
`spray nozzles 222 that are connected to a fourth spray mani­
`fold 224.
`The cold planer 100 also includes a final stage conveyor
`spray bank 226 that generates water sprays directed towards
`the material travelling on the belt 146 of the final stage con­
`veyor 144. During operation, operation of this spray bank
`may be optional and used for material that is either generating
`more dust that what can be effectively suppressed by the spray
`banks upstream in the material flow direction, and/or material
`that may still retain heat from the milling operation. The final
`stage conveyor spray bank 226 includes a fifth plurality of
`spray nozzles 228 that are connected to a fifth spray manifold
`230.
`For providing the user and other personnel working along­
`side the cold planer 100 a water source, for example, for
`rinsing machine components during or after a milling opera­
`tion, the cold planer 100 further includes a low pressure spray
`bank 232 that includes one or more reeled hoses 234 con­
`nected to a manual spray nozzle 236. During operation, when
`the low pressure spray bank 232 is active, a worker may
`dispense a desired length of hose 234 and deliver a low
`pressure water spray from the manual nozzle 236 as desired.
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`The water flow and water pressure provided to each of the
`six spray banks described above is controlled by a respective
`electro-mechanical flow control valve. Specifically, a first
`valve 238, which is responsive to a first control signal pro­
`vided by a first line 240 to the first valve 238 from an elec­
`tronic controller 242, selectively fluidly interconnects the first
`spray manifold 204 with a main distribution manifold 244 in
`response to the first control signal. Similarly, a second valve
`246 communicates with the controller 242 via a second line
`248 providing a second control signal for fluidly connecting
`the second manifold 210 with the main distribution manifold
`244; a third valve 250 communicates with the controller 242
`via a third line 252 providing a third control signal for fluidly
`connecting the third manifold 218 with the main distribution
`manifold 244; a fourth valve 254 communicates with the
`controller 242 via a fourth line 256 providing a fourth control
`signal for fluidly connecting the fourth manifold 224 with the
`main distribution manifold 244; a fifth valve 258 communi­
`cates with the controller 242 via a fifth line 260 providing a
`fifth control signal for fluidly connecting the fifth manifold
`230 with the main distribution manifold 244; and a sixth valve
`262 communicates with the controller 242 via a sixth line 264
`providing a sixth control signal for fluidly connecting the one
`or more hoses 234 with the main distribution manifold 244.
`Water under pressure is present in the main distribution
`manifold 244 during operation. The water is drawn from a
`reservoir 266 by a pump 268 through a supply pipe 267. The
`pump 268 is embodied as a variable-speed pump, which can
`control the flow and/or pressure of water provided to the main
`distribution manifold. Although the pump 268 is a variable­
`speed pump in the embodiment shown in FIG. 4, other pump
`types may be used, including variable-displacement andposi-
`tive-displacement pumps may be used to control the flow
`and/or pressure of water provided to the main distribution
`manifold 244. In the illustrated embodiment, the pump 268 is
`driven by a variable-speed hydraulic motor 270 that can oper­
`ate in both directions to supply and draw water from the main
`distribution manifold 244. The hydraulic motor 270 is sup­
`plied by pressurized hydraulic fluid via first and second con­
`duits 272 and 274 through a control valve 276. The control
`valve 276 is a two-port, infinite-position flow control valve
`operated by an electrical actuator 278 that is responsive to a
`pump control signal provided via a pump control line 280
`from the controller 242.
`For controlling the pump 268, a water pressure sensor 282
`is associated with the main distribution manifold 244 and
`arranged to provide a signal indicative of a real-time water
`pressure therewithin. The water pressure sensor 282 provides
`a pressure signal via a pressure signal line 290 to the control­
`ler 242. The controller 242 further receives information on the
`operating mode of the cold planer 100 via an interface 292
`that is connected to various other machine components and
`systems, which are collectively denoted by reference numeral
`294 in FIG. 4. The various other machine components and can
`include signals from various switches, levers, engine con­
`trols, and other machine controls that are indicative of a
`machine operating condition. Representative machine oper­
`ating conditions can include information on whether the
`machine is milling or travelling, a depth and speed of planing,
`the type of material being milled, a power draw of the drum,
`whether the intermediate stage and/or final stage conveyors
`are operating, the operating speed of the conveyor(s), the
`operating speed of the drum, the type of drum used, whether
`a vacuum for dust control is present and, if so, whether the
`vacuum is operational, and other parameters.
`The controller 242, based on the signals provided from the
`interface 292, can determine which spray banks shall operate,
`
`

`

`Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 5 of 7 PageID #: 24063
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`US 9,371,618 B2
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`7
`and provide appropriate command signals to the respective
`valves, as previously described. Moreover, based on an esti­
`mated water flow through the main distribution manifold 244,
`which depends on the water flow provided to any of the spray
`banks that are activated, the controller may further provide an
`appropriate pump control signal that will cause the pump 268
`to operate and provide a water flow that is equal to, or just
`above, the estimated water flow. Such pump control can be
`carried out in a closed loop fashion, automatically by the
`controller based on the pressure signal from the pressure
`sensor 282 as feedback, for example, in a proportional, inte­
`gral, and derivative term (PID) controller using a pressure in
`the manifold as a setpoint. Alternatively, in one embodiment,
`the machine may operate in a manual mode, in which the
`operator may manually set a pressure setpoint for the spray
`manifold. Thereafter, during operation, the system may work
`in much the same way as in the automatic mode of operation
`whereby the pump is controlled to maintain the setpoint pres­
`sure automatically and regardless of the spray banks that are
`manually activated by the operator. In both these embodi­
`ments, efficiency in water usage, and reduction of parasitic
`power usage at the pump 268, can be advantageously
`improved.
`One embodiment for the main distribution manifold 244 is
`shown in FIG. 5, in which like structures and elements are
`denoted by the same reference numerals as previously used
`for simplicity. As shown, the main distribution manifold 244
`includes a housing 300, which is mountable to the machine
`frame and which can be manufactured as a steel casting. The
`housing 300 forms various ports into which the first valve
`238, second valve 246, third valve 250, fourth valve 254, fifth
`valve 258 and sixth valve 262 can be directly installed. Each
`of these valves can be further connected to a respective pres­
`sure-hose that provides the corresponding water flow to the
`respective spray nozzles in the machine. A manometer 302
`connected to the housing 300 and configured to sense a water
`pressure therein may provide a quick visual indication of
`water pressure to the operator when the housing 300 is
`mounted in a visible location on the machine. The pressure
`sensor 282 may also be connected directly to the housing 300.
`The housing 300 may further illustrate graphically the spray
`bank controlled by each valve, and switches may be mounted
`adjacent to these graphics to manually control each spray
`bank for activation by the operator.
`
`INDUSTRIAL APPLICABILITY
`
`The control systems and methods described herein and
`shown in the various figures, for example, in FIG. 4, can be
`advantageously used in a cold planer, for example, the cold
`planer 100 shown in FIG. 1. By using electronically con­
`trolled valves to control the water flow provided to each spray
`bank, each water spray bank can be turned on and off
`remotely by the operator and/or by the machine controller
`when certain operating conditions are met. These remote
`controls can be placed for convenient operation by the opera­
`tor, for example, in the display, control panel switches/but-
`tons, and the like, for access during machine operation. In one
`embodiment, the water spray banks can be turned on and off
`automatically based on machine operating conditions, for
`example, based on sensor readings, status of machine func­
`tions such as rotor drive, conveyor, vacuum dust control, and
`the like. In a more basic implementation, the remote control
`of the valves can allow the operator to simply open and close
`the desired valve(s) during machine operation based on the
`specific needs of the application, as determined in real time by
`the operator. Use of proportional valves for the individual
`
`8
`water banks allows for precise, repeatable flow limiting into
`each bank. This enables automatic flow limiting based on
`machine operating conditions or manual remote flow limiting
`by the operator, for example, by setting a desired flow and/or
`a manually input water pressure setpoint in an operator inter­
`face or display. Alternatively, on/off valves can be used to
`simplify the system and reduce cost, but with some loss of the
`above-stated functionality.
`A method for operating a water system on a cold planer is
`illustrated in the flowchart of FIG. 6. The recited method can
`be carried out by any appropriate means such as by a com­
`puter-executable algorithm operating within a programmable
`controller, for example, the controller 242 (FIG. 4). At the
`beginning of the process, the control system may determine
`an operating condition and/or operating mode of the machine
`at step 402. This determination may be carried out automati­
`cally, for example, by supplying information indicative of the
`operating state of the machine into a selection routine of the
`algorithm. Information indicative of the operating state of the
`machine may include information indicative of drum opera­
`tion and speed, conveyor belt activation and speed, machine
`ground speed, vacuum system activation, type of material
`planed, planing depth, and other information. All such infor­
`mation may be input to a multi-dimensional lookup function
`ortablethat correlates, based on predetermined relationships,
`the various operating mode signals with activation and/or
`pressure of activation of the various spray banks on the
`machine. Based on the operating information, the control
`determined or decides which spray banks will be activated,
`and at what pressure, using the lookup function at step 404.
`For instance, a signal indicating that the cutting drum is
`operating may call for automatic activation of the first rotor
`chamber spray bank 200. A signal indicating that a dust
`vacuum system, which is configured to draw dust particles
`from the atmosphere within the housing in which the drum is
`operating, is not activated while the drum is operating may
`call for automatic activation of the second rotor chamber
`spray bank 206 while the first rotor chamber spray bank 200
`is also active. Similarly, the various other spray banks may be
`activated when the intermediate and final stage conveyors are
`operating.
`After the various spray banks, and their operating pres­
`sures, have been determined, the system will estimate the
`aggregate water flow and pressure that should be provided to
`the main spray manifold at step 406. Alternatively, this deter­
`mination can be made based on an operator input of a desired
`pressure. The estimation may involve a flow calculation, or
`may alternatively be a determination based on pre-existing
`flows for the individual spray banks, which are added to
`produce the aggregate amount based on which spray banks
`are active. Once the desired water flow and/or pressure has
`been determined, a command signal is provided to the pump
`at step 408. The command signal is sufficient to achieve the
`estimated water flow and/or pressure within the spray distri­
`bution manifold.
`An interrogation of whether a change has occurred in the
`desired water flow is made at 410. When a new operating
`condition is present, which may also include a manual spray
`bank activation by the operator, the controller recalculates the
`pump command beginning from step 402. If no changes are
`present at 410, the process continues with monitoring mani­
`fold pressure at 412, and controlling the pump to maintain
`that pressure, for example, using a closed loop control scheme
`that has manifold pressure as a feedback. When the pressure
`has stabilized, or even before it has stabilized, the appropriate
`control valves are opened in response to appropriate control
`signals at step 414, and water is delivered to the various
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`Case 1:17-cv-00770-JDW Document 230-7 Filed 10/05/23 Page 6 of 7 PageID #: 24064
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`US 9,371,618 B2
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`9
`portions of the machine. This water spray continues and the
`manifold is maintained at the desired pressure while there are
`no command changes.
`It will be appreciated that the foregoing description pro­
`vides examples of the disclosed system and technique. How­
`ever, it is contemplated that other implementations of the
`disclosure may differ in detail from the foregoing examples.
`All references to the disclosure or examples thereof are
`intended to reference the particular example being discussed
`at that point and are not intended to imply any limitation as to
`the scope of the disclosure more generally. All language of
`distinction and disparagement with respect to certain features
`is intended to indicate a lack of preference for those features,
`but not to exclude such from the scope of the disclosure
`entirely unless otherwise indicated.
`Recitation of ranges of values herein are merely intended to
`serve as a shorthand method of referring individually to each
`separate value falling within the range, unless otherwise indi­
`cated herein, and each separate value is incorporated into the
`specification as if it were individually recited herein. All
`methods described herein can be performed in any suitable
`order unless otherwise indicated herein or otherwise clearly
`contradicted by context.
`We claim:
`1. A cold planer machine comprising a frame and a drum
`enclosed within a housing and arranged to rotate about a drum
`axis, the drum connected to the frame and configured to plane
`a road surface during operation, the cold planer comprising:
`a primary rotor spray bank mounted to the frame and dis­
`posed in the housing, the primary rotor chamber spray
`bank including a first plurality of spray nozzles arranged
`along a first spray manifold, the first plurality of spray
`nozzles being arranged parallel to the drum axis and
`being oriented such that a plurality of water sprays pro­
`vided therethrough are directed towards the drum;
`a water reservoir mounted on the frame and configured to
`enclose water;
`a pump fluidly associated with the water reservoir and
`configured to draw the water therefrom, pressurize the
`water, and provide pressurized water to a main spray
`manifold connected to the frame;
`wherein the pump is configured to pressurize the water to a
`variable pressure in response to a pump signal;
`a pressure sensor associated with the main spray manifold
`and configured to provide a pressure signal indicative of
`a pressure of the pressurized water within the main spray
`manifold;
`a first control valve fluidly disposed between the main
`spray manifold and the first spray manifold, the first
`control valve selectively fluidly connecting the main
`with the first spray manifold in response to a valve
`signal;
`an electronic controller associated with the cold planer and
`configured to receive a plurality of operating signals
`indicative of an operating condition of the cold planer,
`the electronic controller disposed to:
`monitor the plurality of operating signals;
`determine an operating state of the cold planer based on
`the operating signals;
`determine whether the primary rotor spray bank should
`be activated based on the operating state;
`estimate an amount of pressurized water that will be
`required to operate the primary rotor spray bank when
`it is determined that the primary rotor spray bank
`should be activated;
`determine a desired main spray manifold pressure based
`on the estimated amount of pressurized water;
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`10
`determine the pump signal based on the desired main
`spray pressure, and send the pump signal to the pump;
`activate the first control valve by sending the valve signal
`to the first control valve when it is determined that the
`primary rotor spray bank should be activated; and
`maintain the desired main spray manifold pressure by
`adjusting the pump signal based on the pressure signal
`as a primary control parameter continuously during
`operation.
`2. The cold planer of claim 1, further comprising:
`a second rotor spray bank mounted to the frame and dis­
`posed in parallel with the primary rotor chamber spray
`bank, the second rotor chamber spray bank including a
`second plurality of spray nozzles arranged along a sec­
`ond spray manifold, the second plurality of spray
`nozzles being oriented such that each of a second plu­
`rality of water sprays provided therethrough is directed
`towards the drum;
`a second control valve fluidly disposed between the main
`spray manifold and the second spray manifold, the sec­
`ond control valve selectively fluidly connecting the sec­
`ond spray manifold with the main spray manifold in
`response to a second valve signal;
`wherein the electronic controller is further disposed to:
`determine whether the second rotor spray bank should
`be activated based on the operating state;
`estimate an aggregate amount of pressurized water that
`will be required to operate the first and second rotor
`spray banks when it is determined that the first and
`second rotor spray banks should be activated; and
`activate the second control valve by sending the second
`valve signal to the second control valve when it is
`determined that the second rotor spray bank should be
`activated.
`3. The cold planer of claim 1, further comprising:
`an intermediate stage conveyor mounted to the frame and
`extending from a drum transition region adjacent the
`drum, through an opening in the housing, and to a con­
`veyor transition region, the intermediate stage conveyor
`configured to receive material planed by the drum and
`transport it to the conveyor transition region;
`a transition region spray bank including a third plurality of
`spray nozzles disposed along a third spray manifold,
`within the housing, and being oriented towards the drum
`transition region;
`a third control valve fluidly disposed between the main
`spray manifold and the third spray manifold, the third
`control valve selectively fluidly connecting the third
`spray manifold with the main spray manifold in
`response to a third valve signal;
`wherein the electronic controller is further disposed to:
`determine whether the transition region spray bank
`should be