US20130168073A1 - Work vehicle fluid heating system - Google Patents
Work vehicle fluid heating system Download PDFInfo
- Publication number
- US20130168073A1 US20130168073A1 US13/710,810 US201213710810A US2013168073A1 US 20130168073 A1 US20130168073 A1 US 20130168073A1 US 201213710810 A US201213710810 A US 201213710810A US 2013168073 A1 US2013168073 A1 US 2013168073A1
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- US
- United States
- Prior art keywords
- fluid
- fan
- fluid circuit
- control device
- heating system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00314—Arrangements permitting a rapid heating of the heating liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
- E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- This invention relates generally to fluid heating systems, and the use thereof, and, more particularly, to vehicle fluid heating systems.
- the temperature of the hydraulic oil must be increased to a minimum operating temperature before implement operation, such as a loader, is allowed.
- This oil can be heated by the operator manually by cycling the loader circuit, but this activity can be both fatiguing and time-consuming to the operator.
- the vehicle could include a system or arrangement on the vehicle to warm the hydraulic oil already being automatically circulated, such as with a fixed-flow cooling fan circuit.
- a drawback of a fixed-flow cooling fan circuit is that it is pressure-controlled. That is, a fixed amount of flow supplies the circuit via a gear pump, and a variable pressure-relief valve defines the inlet pressure to the hydraulic cooling fan. In response to an increase in the pressure in the cooling fan circuit, the speed of the cooling fan likewise increases, providing undesirable cooling to the same hydraulic oil that is to be heated. In other words, it has not been possible to generate a high system pressure (which would most quickly heat the oil) without also operating the cooling fan at a high speed.
- an inexpensive pressure-controlled fixed-flow cooling fan circuit to operate at a high pressure without increasing the speed of the cooling fan in order to minimize time associated with heating hydraulic oil associated with implement operation of a work vehicle. It would additionally be desirable for the fan circuit to operate essentially independently of an operator (an automatic process) that generates large amounts of pump flow at a high pressure, and operates independently of or without resulting in external movement of the implement.
- the present invention relates to a fluid heating system for a work vehicle including a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit.
- Pressurized fluid of the fluid circuit provided to the fan results in fan operation.
- a speed of the fan corresponding to a flow rate of pressurized fluid of the fluid circuit provided to the fan.
- a control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position.
- the first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan.
- the second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
- the present invention further relates to fluid heating system for a work vehicle including a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit.
- Pressurized fluid of the fluid circuit provided to the fan results in fan operation, the fluid circuit operating independent of or not resulting in external movement of an implement.
- a speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan.
- a control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
- the present invention further relates to a method for heating a work vehicle including providing a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit.
- Pressurized fluid of the fluid circuit provided to the fan results in fan operation.
- a speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan.
- a control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan.
- the second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
- the method further includes selectably actuating the control device between the first position and the second position.
- An advantage of the present invention is the capability to rapidly warm hydraulic oil in a hydraulic circuit.
- a further advantage of the present invention is the capability to rapidly warm hydraulic oil in a hydraulic circuit independent of or without resulting in external movement of an implement or requiring continuous input from an operator.
- FIGS. 1 and 2 are schematic representations of an exemplary embodiment of a fluid heating system of the present disclosure.
- FIGS. 1-2 show schematic representations of an exemplary embodiment of the present disclosure.
- FIG. 1 shows a fluid heating system 10 including a control device 12 , such as a digitally controlled solenoid valve having a first position 20 and a second position 22 .
- Control device 12 is controlled by a control module 24 that receives input signals from sensors 34 associated with temperatures and/or other component/system/subsystem operating parameters.
- a control module 24 that receives input signals from sensors 34 associated with temperatures and/or other component/system/subsystem operating parameters.
- hydraulic pump 26 provides pressurized hydraulic oil to a fluid circuit 28 .
- control device 12 In response to sensors 34 controlled by control module 24 sensing the temperature of the hydraulic oil in fluid circuit 28 , as well as other temperature/parameters as discussed in further detail below, control device 12 is maintained in first position 20 , providing unobstructed flow to and from fan motor 14 .
- a motor hydraulic pump 26 provides pressurized hydraulic oil to fluid circuit 28 .
- control device 12 is actuated to second position 22 .
- second position 22 of control device 12 contains a flow restrictor therein for raising the fluid pressure between pump 26 and control device 12 .
- a valve such as a pressure relief or bypass valve 30 is urged to an open position, permitting the pressurized oil to bypass fan motor 14 such as shown by directional arrows 36 , continue through the remainder of fluid circuit 28 through to oil sump 32 .
- the pressurized oil bypassing fan motor 14 only a small amount of hydraulic oil reaches fan motor 14 , so that fan motor 14 operates at a reduced rotational speed, thereby reducing cooling capacity of hydraulic oil contained in fluid circuit 28 by fan 16 , while forcing flow of hydraulic oil of fluid circuit 28 to bypass the majority of the system flow at an elevated pressure back to oil sump 32 .
- fluid heating system 10 operates substantially independent of or substantially without input from an operator. In another embodiment, operation of fluid heating system 10 may be automatic, i.e., not requiring interaction from the operator.
- fluid circuit 28 includes one of component module 38 or component module 40 , depending upon which of component modules 38 , 40 is purchased by the user.
- component modules 38 , 40 which are not otherwise relevant to operation of the present disclosure are not further discussed.
- An optional heat exchanger 44 may be utilized by fluid circuit 28 , such as for purposes of thermal exchange with other system(s) and/or subsystem(s) such as discussed in more detail below.
- the location of exchanger 44 may be utilized anywhere downstream of the node 46 of component module 40 , or downstream of the node 48 of component module 38 , depending on which of component modules 38 , 40 is present in fluid system 28 .
- control device 12 may have multiple positions with differently sized restrictions.
- restriction of control device 12 may be variably sized.
- This arrangement has an additional advantage of substantially eliminating external motion such as might be associated might when loading the engine via the ground drive or implement hydraulic cylinders. Substantially eliminating such external motion of the work vehicle reduces danger and risk to objects and personnel near the work vehicle while permitting a process that can be automatically performed. It is to be understood that the system 10 would be operated at predetermined time intervals less than those resulting in damage to the vehicle.
- Control device 12 operation can also be utilized to warm a frozen urea tank (not shown) more quickly, reducing the time to operation of the work vehicle in cold temperatures, the urea used as a reductant within the SCR system.
- feedback signals received from various sensors provided to the control module may include the following operating parameters:
- One embodiment relates to heating the air temperature inside the operator cab more quickly. For example, to turn ON the feature (i.e., energize the control valve or control device 12 ) all of the following conditions must be met for a predetermined period of time, such as 20 consecutive seconds, although in other embodiments other time periods of different duration and/or different parameters may be used:
- valve or control device 12 once the valve or control device 12 is energized (ON), auto fan control is be disabled and fan speed should be set to maximum fan speed.
- valve or control device 12 once the valve or control device 12 is energized, any of the following conditions may be used to turn the valve OFF, although in other embodiments, the number and amount of conditions may be different:
Abstract
A fluid heating system for a work vehicle including a pressurized fluid circuit, a pump, and a fan for cooling fluid of the fluid circuit. Pressurized fluid of the fluid circuit provided to the fan results in fan operation. A speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan. A control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude and increasing a temperature of the fluid system.
Description
- This invention relates generally to fluid heating systems, and the use thereof, and, more particularly, to vehicle fluid heating systems.
- In cold climates, it is important to minimize the amount of time needed to warm a vehicle to operating temperature. More specifically, the temperature of the hydraulic oil must be increased to a minimum operating temperature before implement operation, such as a loader, is allowed. This oil can be heated by the operator manually by cycling the loader circuit, but this activity can be both fatiguing and time-consuming to the operator. Alternatively, the vehicle could include a system or arrangement on the vehicle to warm the hydraulic oil already being automatically circulated, such as with a fixed-flow cooling fan circuit.
- A drawback of a fixed-flow cooling fan circuit is that it is pressure-controlled. That is, a fixed amount of flow supplies the circuit via a gear pump, and a variable pressure-relief valve defines the inlet pressure to the hydraulic cooling fan. In response to an increase in the pressure in the cooling fan circuit, the speed of the cooling fan likewise increases, providing undesirable cooling to the same hydraulic oil that is to be heated. In other words, it has not been possible to generate a high system pressure (which would most quickly heat the oil) without also operating the cooling fan at a high speed.
- Accordingly, it would be desirable to provide an inexpensive pressure-controlled fixed-flow cooling fan circuit to operate at a high pressure without increasing the speed of the cooling fan in order to minimize time associated with heating hydraulic oil associated with implement operation of a work vehicle. It would additionally be desirable for the fan circuit to operate essentially independently of an operator (an automatic process) that generates large amounts of pump flow at a high pressure, and operates independently of or without resulting in external movement of the implement.
- The present invention relates to a fluid heating system for a work vehicle including a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit. Pressurized fluid of the fluid circuit provided to the fan results in fan operation. A speed of the fan corresponding to a flow rate of pressurized fluid of the fluid circuit provided to the fan. A control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
- The present invention further relates to fluid heating system for a work vehicle including a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit. Pressurized fluid of the fluid circuit provided to the fan results in fan operation, the fluid circuit operating independent of or not resulting in external movement of an implement. A speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan. A control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
- The present invention further relates to a method for heating a work vehicle including providing a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit. Pressurized fluid of the fluid circuit provided to the fan results in fan operation. A speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan. A control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the pressurized fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system. The method further includes selectably actuating the control device between the first position and the second position.
- An advantage of the present invention is the capability to rapidly warm hydraulic oil in a hydraulic circuit.
- A further advantage of the present invention is the capability to rapidly warm hydraulic oil in a hydraulic circuit independent of or without resulting in external movement of an implement or requiring continuous input from an operator.
- It is to be understood that an embodiment of the present invention may incorporate one or more of the identified advantages.
- Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
-
FIGS. 1 and 2 are schematic representations of an exemplary embodiment of a fluid heating system of the present disclosure. - Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
- Referring to the drawings,
FIGS. 1-2 show schematic representations of an exemplary embodiment of the present disclosure.FIG. 1 shows afluid heating system 10 including acontrol device 12, such as a digitally controlled solenoid valve having afirst position 20 and asecond position 22.Control device 12 is controlled by acontrol module 24 that receives input signals fromsensors 34 associated with temperatures and/or other component/system/subsystem operating parameters. Under normal operating conditions, such as when the ambient temperature is greater than a predetermined minimum temperature, such as 90° C. in one application, and in combination with other parameters in other applications such as discussed in further detail below,hydraulic pump 26 provides pressurized hydraulic oil to afluid circuit 28. In response tosensors 34 controlled bycontrol module 24 sensing the temperature of the hydraulic oil influid circuit 28, as well as other temperature/parameters as discussed in further detail below,control device 12 is maintained infirst position 20, providing unobstructed flow to and fromfan motor 14. - However under operating conditions in which hydraulic oil is less than a predetermined minimal temperature, such as zero (0)° C. in one operating condition, and in combination with other parameters and other operating conditions such as disclosed in further detail below, a motor
hydraulic pump 26 provides pressurized hydraulic oil tofluid circuit 28. In response tosensors 34 controlled byelectronic control module 24, the temperature of the hydraulic oil andfluid circuit 28, as well as other exemplary temperature/parameters that are below predetermined minimum values as discussed in further detail below,control device 12 is actuated tosecond position 22. As shown in the figures,second position 22 ofcontrol device 12 contains a flow restrictor therein for raising the fluid pressure betweenpump 26 andcontrol device 12. When the fluid pressure of the hydraulic oil is sufficiently raised, a valve such as a pressure relief orbypass valve 30 is urged to an open position, permitting the pressurized oil to bypassfan motor 14 such as shown bydirectional arrows 36, continue through the remainder offluid circuit 28 through tooil sump 32. As a result, the pressurized oil bypassingfan motor 14, only a small amount of hydraulic oil reachesfan motor 14, so thatfan motor 14 operates at a reduced rotational speed, thereby reducing cooling capacity of hydraulic oil contained influid circuit 28 by fan 16, while forcing flow of hydraulic oil offluid circuit 28 to bypass the majority of the system flow at an elevated pressure back tooil sump 32. The combination of flow of the hydraulic oil at increased pressure, as well as the reduced cooling capacity of fan 16 more quickly results in raising the fluid temperature of the hydraulic oil. In other words, the arrangement of thecontrol device 12 reduces the amount of time required to reach a nominal hydraulic oil operating temperature, while requiring no continuous interaction from the operator, such as initial operator interaction of an optional manually operatedcontrol 42. In one embodiment,fluid heating system 10 operates substantially independent of or substantially without input from an operator. In another embodiment, operation offluid heating system 10 may be automatic, i.e., not requiring interaction from the operator. - As shown in the figures,
fluid circuit 28 includes one ofcomponent module 38 orcomponent module 40, depending upon which ofcomponent modules component modules - An
optional heat exchanger 44 may be utilized byfluid circuit 28, such as for purposes of thermal exchange with other system(s) and/or subsystem(s) such as discussed in more detail below. The location ofexchanger 44 may be utilized anywhere downstream of thenode 46 ofcomponent module 40, or downstream of thenode 48 ofcomponent module 38, depending on which ofcomponent modules fluid system 28. - It is to be understood that the size of the restriction of
control device 12 andsecond position 22 may be optimized to generate a specific heat load. In one embodiment,control device 12 may have multiple positions with differently sized restrictions. In one embodiment, the restriction ofcontrol device 12 may be variably sized. - It was found in development that this solution could also solve an additional problem discovered on working vehicles, such as diesel burning wheel loaders with Selective Catalytic Reduction (SCR) exhaust treatment. On some of these vehicles, the engine must be periodically warmed above a certain temperature when idling for extended periods of time, such as more than six hours, to prevent damage to the vehicle. The
system 10 described above can be used to increase the temperature of the diesel engine (and in turn the SCR system) by creating a parasitic load on the engine in the manner previously described. By energizing oractuating control device 12 tosecond position 22, it was shown that the temperature of the diesel engine could be elevated above this threshold temperature automatically, again independent of or without any input from the operator. This arrangement has an additional advantage of substantially eliminating external motion such as might be associated might when loading the engine via the ground drive or implement hydraulic cylinders. Substantially eliminating such external motion of the work vehicle reduces danger and risk to objects and personnel near the work vehicle while permitting a process that can be automatically performed. It is to be understood that thesystem 10 would be operated at predetermined time intervals less than those resulting in damage to the vehicle. -
Control device 12 operation can also be utilized to warm a frozen urea tank (not shown) more quickly, reducing the time to operation of the work vehicle in cold temperatures, the urea used as a reductant within the SCR system. - There are at least four different uses of the fluid heating system of the present disclosure:
-
- 1. Heating the air temperature inside the cab more quickly
- 2. Periodically elevating the engine temperature to combat hydrocarbon build-up in SCR system
- 3. More rapidly warming the urea tank
- 4. More rapidly warming the hydraulic oil.
- In one embodiment, feedback signals received from various sensors provided to the control module may include the following operating parameters:
- Fan Reverser state
Auto Fan state
However, in other embodiments, other combinations of feedback signals, possibly including additional parameters may be utilized, such as air cabin temperature. - One embodiment relates to heating the air temperature inside the operator cab more quickly. For example, to turn ON the feature (i.e., energize the control valve or control device 12) all of the following conditions must be met for a predetermined period of time, such as 20 consecutive seconds, although in other embodiments other time periods of different duration and/or different parameters may be used:
- Fan Reverser state=Not Active
- In this embodiment, once the valve or
control device 12 is energized (ON), auto fan control is be disabled and fan speed should be set to maximum fan speed. - In this embodiment, once the valve or
control device 12 is energized, any of the following conditions may be used to turn the valve OFF, although in other embodiments, the number and amount of conditions may be different: - In this embodiment, if any parameter for entry or exit condition of this routine is not present or out of range, then the feature is disabled.
- In one embodiment, to periodically elevate the engine temperature to combat hydrocarbon build-up in the SCR system:
- To turn ON the feature (i.e., energized the valve or control device 12) the following conditions are to be met for X1 consecutive seconds:
-
- Coolant Temperature<Y1° C.
Once the valve orcontrol device 12 is energized, auto fan control is to be disabled and fan speed is to be set to maximum fan speed.
Once the valve orcontrol device 12 is energized, the following conditions may be used to turn the valve OFF: - Temperature>YY1° C. for Z1 consecutive seconds (YY1≧Y1)
If the Coolant Temperature signal is not present or out of range, then the feature is to be disabled.
- Coolant Temperature<Y1° C.
- In one embodiment, to more rapidly warm the urea tank:
- To turn ON the feature (i.e., energize the valve or control device 12) the following conditions are to be met for X2 consecutive seconds:
-
- Urea Temperature<Y2° C.
Once the valve orcontrol device 12 is energized, auto fan control is to be disabled and fan speed set to maximum fan speed.
Once the valve orcontrol device 12 is energized, the following conditions may be used to turn the valve OFF: - Urea Temperature>YY2° C. for Z2 consecutive seconds (YY2≧Y2)
If the: Urea Temperature signal is not present or out of range, then the feature is to be disabled.
- Urea Temperature<Y2° C.
- In one embodiment, to more rapidly warm the hydraulic oil:
- To turn ON the feature (i.e., energize the valve or control device 12) the following conditions are to be met for X3 consecutive seconds:
-
- Hydraulic Oil Temperature<Y3° C.
Once the valve orcontrol device 12 is energized, auto fan control is to be disabled and fan speed set to maximum fan speed.
Once the valve orcontrol device 12 is energized, the following conditions are to turn the valve OFF: - Hydraulic Oil Temperature>YY3° C. for Z3 consecutive seconds (YY3≧Y3)
If the: temperature signal is not present or out of range, then the feature is to be disabled.
- Hydraulic Oil Temperature<Y3° C.
- While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (20)
1. A fluid heating system for a work vehicle comprising:
a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit, pressurized fluid of the fluid circuit provided to the fan resulting in fan operation, a speed of the fan corresponding to a flow rate of pressurized fluid of the fluid circuit provided to the fan; and
a control device in fluid communication with the fluid circuit, the control device operable between a first position and a second position;
wherein the first position of the control device resulting in substantially all of the pressurized fluid of the fluid circuit being provided to the fan, the second position of the control device resulting in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
2. The fluid heating system of claim 1 , wherein the fluid circuit operates independent of external movement of an implement.
3. The fluid heating system of claim 1 , wherein the second position of the control device restricts fluid flow of the fluid circuit therethrough.
4. The fluid heating system of claim 1 , wherein the fluid circuit operates substantially independent of input from an operator.
5. The fluid heating system of claim 1 , wherein the fluid circuit operates independent of input from an operator.
6. The fluid heating system of claim 1 , comprising a heat exchanger in thermal communication between the fluid circuit and a system and/or subsystem of the work vehicle.
7. The fluid heating system of claim 6 , wherein the heat exchanger increases a temperature interior of a cab of the work vehicle.
8. The fluid heating system of claim 6 , wherein the heat exchanger selectably increases an engine temperature.
9. The fluid heating system of claim 8 , wherein the heat exchanger selectably increases the engine temperature at predetermined time intervals.
10. The fluid heating system of claim 6 , wherein the fluid circuit operates independent of external movement of an implement.
11. A fluid heating system for a work vehicle comprising:
a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit, pressurized fluid of the fluid circuit provided to the fan resulting in fan operation, the fluid circuit operating independent of external movement of an implement, a speed of the fan corresponding to a flow rate of pressurized fluid of the fluid circuit provided to the fan;
and
a control device in fluid communication with the fluid circuit, the control device operable between a first position and a second position;
wherein the first position of the control device resulting in substantially all of the pressurized fluid of the fluid circuit being provided to the fan, the second position of the control device resulting in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system.
12. The fluid heating system of claim 11 , wherein the fluid circuit operates independent of continuous input from an operator.
13. The fluid heating system of claim 11 , wherein the fluid circuit operates substantially independent of input from an operator.
14. The fluid heating system of claim 11 , wherein the fluid circuit operates independent of input from an operator.
15. The fluid heating system of claim 11 , comprising a heat exchanger in thermal communication between the fluid circuit and a system and/or subsystem of the work vehicle.
16. A method for heating a work vehicle comprising:
providing a pressurized fluid circuit having a pump and a fan for cooling pressurized fluid of the fluid circuit, pressurized fluid of the fluid circuit provided to the fan resulting in fan operation, a speed of the fan corresponding to a flow rate of pressurized fluid of the fluid circuit provided to the fan, a control device in fluid communication with the fluid circuit, the control device operable between a first position and a second position, wherein the first position of the control device resulting in substantially all of the pressurized fluid of the fluid circuit being provided to the fan, the second position of the control device resulting in at least a portion of the pressurized fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude of and increasing a temperature of the fluid system; and
selectably actuating the control device between the first position and the second position.
17. The method of claim 16 , wherein the fluid circuit operates independent of external movement of an implement.
18. The method of claim 16 , wherein the fluid circuit operates substantially independent of input from an operator.
19. The method of claim 16 , wherein the fluid circuit operates independent of input from an operator.
20. The method of claim 16 , comprising a heat exchanger in thermal communication between the fluid circuit and a system and/or subsystem of the work vehicle.
Priority Applications (1)
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US13/710,810 US20130168073A1 (en) | 2011-12-30 | 2012-12-11 | Work vehicle fluid heating system |
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US201161581698P | 2011-12-30 | 2011-12-30 | |
US13/710,810 US20130168073A1 (en) | 2011-12-30 | 2012-12-11 | Work vehicle fluid heating system |
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US13/710,810 Abandoned US20130168073A1 (en) | 2011-12-30 | 2012-12-11 | Work vehicle fluid heating system |
US13/710,850 Active 2033-07-31 US9115736B2 (en) | 2011-12-30 | 2012-12-11 | Work vehicle fluid heating system |
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US13/710,850 Active 2033-07-31 US9115736B2 (en) | 2011-12-30 | 2012-12-11 | Work vehicle fluid heating system |
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US20130167823A1 (en) | 2013-07-04 |
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