Systems and methods for pressurizing fluids used to perform operations of a machine

Abstract

Systems, methods, and apparatuses for operating a machine using energy stored in compressed gas are disclosed. Energy stored in compressed gas can be used to pressurize a fluid, such as a transmission fluid, and the pressurized fluid can be used to effect operation of a machine, such as a transmission, and the operation of the machine can include shifting of the transmission. The gas can be compressed with another fluid that is different from the fluid used to operate the machine, and the two fluids can be prevented from mixing together.

Description

Technical Field

[0001] This disclosure generally relates to the operation of vehicle transmissions. Background Technology

[0002] A vehicle transmission is used to transfer power from a power source (such as an engine) to the drive shaft to drive the vehicle. A transmission is operable to change the speed and torque applied to the drive shaft relative to the engine speed and torque. Summary of the Invention

[0003] A first aspect of this disclosure relates to a system for pressurizing a fluid used to perform operation of a transmission. The system may include a source of the pressurized first fluid and an accumulator in fluid communication with the pressurized first fluid. The accumulator may contain a gas capable of being compressed in response to the pressurized first fluid. A second fluid may be capable of flowing from the accumulator to the transmission in response to the compressed gas, thereby facilitating transmission operation.

[0004] A second aspect of this disclosure relates to a method of operating a transmission. The method may include: compressing gas in an accumulator to a selected pressure using a first fluid; pressurizing a second fluid with the compressed gas; applying the pressurized second fluid to the transmission; and operating the transmission using the pressurized second fluid.

[0005] Other features and aspects will become apparent upon consideration of the detailed description and accompanying drawings. Attached Figure Description

[0006] For a detailed description of the accompanying drawings, please refer to the accompanying drawings, in which:

[0007] Figure 1 This is a schematic diagram of an exemplary system for selectively providing hydraulic pressure to operate a machine, according to some embodiments of the present disclosure.

[0008] Figure 2 This is a flowchart of an example method for performing machine operations using an energy storage device, according to some embodiments of this disclosure.

[0009] Figure 3 This is a schematic diagram of another exemplary system for selectively providing hydraulic pressure to operate a machine, according to some embodiments of this disclosure.

[0010] Figure 4 This is a block diagram illustrating an exemplary computer system for providing computational functions associated with the algorithms, methods, functions, processes, flows, and programs described herein, according to some embodiments of the present disclosure. Detailed Implementation

[0011] To facilitate understanding of the principles of this disclosure, reference will now be made to embodiments illustrated in the accompanying drawings, and these embodiments will be described in specific language. However, it will be understood that this is not intended to limit the scope of this disclosure. Any changes and additional modifications to the described apparatus, instruments, and methods, as well as any additional applications of the principles of this disclosure, are fully considered, as would normally occur to those skilled in the art related to this disclosure. In particular, it is fully considered that features, components, and / or steps described with respect to one embodiment may be combined with features, components, and / or steps described with respect to other embodiments of this disclosure.

[0012] This disclosure relates to systems, methods, and apparatus for operating a transmission using energy stored in a compressed gas. Specifically, the energy stored in the compressed gas pressurizes a fluid (such as a transmission fluid), which is used to enable gear shifting in the transmission. The gas is compressed together with another fluid, different from the fluid used to operate the transmission, and the two fluids are prevented from mixing. However, the scope and applicability of this disclosure are not limited to transmissions and their operation. Rather, this disclosure covers the operation of other types of machines (such as braking systems). Therefore, although the following description is made in the context of transmissions and their operation (such as gear shifting), the scope of this disclosure is not limited thereto.

[0013] In particular, this disclosure provides an accumulator (such as a clutch in a transmission) that provides fluid pressure for an actuator to perform gear shifting operations. The accumulator avoids the user operating the pump independently and continuously. Because machine actuation can be intermittent, such a pump leads to inefficient, excessive fuel consumption and heat generation.

[0014] Figure 1 This is a schematic diagram of an exemplary system 100 for operating a transmission. System 100 is a pneumatic-hydraulic system that uses a first fluid to pressurize a second fluid used to operate the transmission. The first fluid may be system hydraulic oil, which is used to operate one or more other systems of a machine, such as one or more hydraulic systems of a vehicle. System hydraulic oil can be used to operate one or more drive systems to perform operations. For example, system hydraulic oil can be used to operate one or more actuators, hydraulic motor pumps, or any other type of hydraulic system of a vehicle (such as an agricultural vehicle, construction vehicle, or forestry vehicle). However, other types of vehicles or machines utilizing transmissions are also within the scope of this disclosure.

[0015] System 100 includes an energy storage device 102. The energy storage device 102 includes a body 104 defining an internal chamber 106. The internal chamber 106 includes a first portion 108 and a second portion 110. The first portion 108 has a first cross-sectional size, and the second portion 110 has a second cross-sectional size larger than the first cross-sectional size. In some embodiments, the internal chamber 106 may be cylindrical. For example, in some embodiments, the cross-sectional shape of the first portion 108, the second portion 110, or both may be circular. In other embodiments, the cross-sectional shape of the first portion 108 or the second portion 110, or both, may be polygonal, elliptical, or any other desired shape. Additionally, in some embodiments, the cross-sectional shapes of the first portion 108 and the second portion 110 may correspond to each other, while in other embodiments, the cross-sectional shapes of the first portion 108 and the second portion 110 may be different.

[0016] A movable piston 112 is disposed within an internal chamber 106. The piston 112 is movable in response to pressure changes within the internal chamber 106. The piston 112 includes a first end portion 114 disposed in a first portion 108 of the internal chamber 106 and a second end portion 116 disposed in a second portion 110 of the internal chamber 106. The first end portion 114 and the second end portion 116 are connected by a connector 118. The connector 118 may be a shaft, rod, or other component that connects the first end portion 114 and the second end portion 116. The end portions 114 and 116 of the piston 112 conform to the inner surfaces 120 and 122 of the first portion 108 and the second portion 110 of the internal chamber 106, respectively, to form a seal. The seal forms a barrier within the internal chamber 106 to prevent mixing of fluids located on opposite sides of each end portion of the first end portion 114 and the second end portion 116. In some embodiments, the sealing member 124 is disposed along the periphery of each of the first end portion 114 and the second end portion 116. The sealing member 124 conforms to the inner surfaces 120 and 122 to prevent mixing of fluids disposed on opposite sides of each of the first end portion 114 and the second end portion 116.

[0017] The cross-sectional size of each end portion in the first end portion 114 and the second end portion 116, the stroke of the piston 112 within the reservoir, and the pressure of the gas within the internal chamber 106 (described in more detail below) can be selected to any desired value to provide, for example, operation at a desired pressure and to provide a selected number of actuations of the accumulator 102. Actuation of the accumulator 102 can result in the operation of a machine, such as a gear shift. In embodiments where the first end portion 114 and the second end portion 116 are circular, for example, the diameter of each end portion in the first end portion 114 and the second end portion 116 can be selected to provide a desired performance level, as explained above.

[0018] Piston 112 divides the internal chamber 106 into three segments. A first segment 121 is formed between the first end portion 114 of piston 112 and the end wall 128 of body 104. A second segment 123 is formed between the first end portion 114 and the second end portion 116 of piston 112. A third segment 125 is formed between the second end portion 116 of piston 112 and the second end wall 178 of body 104. The volume defined by each of segments 121, 123, and 125 changes as piston 112 moves within the internal chamber 106.

[0019] A first opening 126 is formed in the body 104 at the first portion 108 of the internal chamber 106 to allow fluid to flow into and out of the first portion 108. In some embodiments, two openings may be formed in the body 104 at the first portion 108. One of the openings may be used to direct fluid into the first portion 108, and the second opening may be used to direct fluid out of the first portion 108. The first opening 126 (or two openings when multiple openings are used to direct fluid into and out of the first portion 108) is formed in the body 104 at a location for providing fluid communication with the first segment 121 of the internal chamber 106. The location of the first opening 126 is selected such that fluid communication with the first segment 121 is maintained during operation of the system 100, regardless of the position of the piston 112 during operation of the system 100, such as when the piston 112 has been fully displaced in the direction of arrow 130 during operation of the system 100.

[0020] Second opening 132 and third opening 134 are formed in body 104 and provide fluid communication with internal chamber 106. Second opening 132 and third opening 134 provide fluid communication with second segment 123. Second opening 132 and third opening 134 may be formed at a location along the first portion 108 or second portion 110 of internal chamber 106 of body 104, as long as second opening 132 and third opening 134 remain in fluid communication with second segment 123 during operation of system 100. For example, during operation of system 100, the position of second opening 132 and third opening 134 remains in fluid communication with second segment 123 even when piston 112 is in a fully displaced position in the direction of arrow 130 or 136.

[0021] Hydraulic system 138 is fluidly connected to accumulator 102 at first opening 126. Hydraulic system 138 may be a hydraulic system used to operate various components of a vehicle (such as an agricultural vehicle, construction vehicle, or forestry vehicle) or another type of machine. Other types of vehicles are also within the scope of this disclosure. Various components may include hydraulic actuators, motor generators, or other components that operate using hydraulic fluid. In some embodiments, hydraulic system 138 includes pump 140 that draws hydraulic fluid from reservoir 142 and distributes pressurized hydraulic fluid to various hydraulic components 144, 146, and 148. Hydraulic fluid returns from hydraulic components 144, 146, and 148 to reservoir 142. Although three hydraulic components are shown, additional or fewer hydraulic components may be included. Pressurized hydraulic fluid is also directed to first opening 126 formed in body 104.

[0022] The pressurized fluid flows through the feed line 150. A first valve 152 is disposed in the feed line 150. In the illustrated example, the first valve 152 is a two-position solenoid-operated valve. In other embodiments, other types of valves may be used. The first valve 152 has a default closed position and an open position. In the default closed position, the first valve 152 prevents the pressurized hydraulic fluid from passing through, and thus prevents the pressurized hydraulic fluid from entering the first portion 108 of the internal chamber 106. In the open position, the first valve 152 allows the pressurized hydraulic fluid to pass through and enter the first portion 108 of the internal chamber 106. The hydraulic fluid from the hydraulic system 138 is referred to as the "first fluid". The first fluid occupies the first segment 121 of the internal chamber 106. As explained above, the volume of the first segment 121 changes in response to the movement of the piston 112.

[0023] A second valve 154 is disposed in a return line 156 that directs hydraulic fluid back to the reservoir 142. In the illustrated example, the second valve 154 is a solenoid-operated two-position valve. In other embodiments, other types of valves may be used. The second valve 154 has a default closed position and an open position. In the default closed position, hydraulic fluid is prevented from flowing from the first portion 108 of the internal chamber 106 into the return line 156 and back to the reservoir 142. In the open position, the second valve 154 allows hydraulic fluid to pass from the first portion 108 of the internal chamber 106 through and to the return line 156 and back to the reservoir 142.

[0024] The hydraulic fluid occupying the second segment 123 is referred to as the "second fluid". In some embodiments, the second fluid occupying the second segment 123 in the hydraulic system 138 can be hydraulic oil, such as hydraulic transmission fluid. In some embodiments, the first fluid and the second fluid can be different fluids. In other embodiments, the first fluid and the second fluid can be the same type of fluid. However, regardless of the nature of the first fluid and the second fluid, the first end portion 114 of the piston serves as a stop to prevent the first fluid and the second fluid from mixing within the internal chamber 106.

[0025] A third valve 158 is disposed in a line 160 that directs the second fluid from the internal chamber 106 to the transmission 162. In the illustrated example, the third valve 158 is an electromagnetically operated two-position valve. In other embodiments, other types of valves may be used. The third valve 158 has a default closed position and an open position. In the default closed position, the third valve 158 prevents the second fluid from passing through the second segment 123 of the internal chamber 106 and reaching the transmission 162. In the open position, the third valve 158 allows the second fluid to pass through the second segment 123 of the internal chamber 106 and reach the transmission 162. The second fluid delivered to the transmission 162 via line 160 is used to operate the transmission 162. For example, the second fluid may be used to operate the clutch 164, such as during gear shifting in the transmission 162. In other embodiments, the second fluid directed from the second segment 123 of the internal chamber 106 via a second opening 132 may be directed to another type of device to perform device operation.

[0026] In the illustrated example, the second fluid transmitted to clutch 164 is used during clutch operation, and the second fluid is collected in reservoir 166. Line 168 is used to return the second fluid collected in reservoir 166 to the second segment 123 of the inner chamber 106 via third opening 134. A fourth valve 170 is provided along line 168. In the illustrated example, the fourth valve 170 is a solenoid-operated two-position valve. In other embodiments, other types of valves may be used. The fourth valve 170 has a default closed position and an open position. In the default closed position, the fourth valve 170 prevents the second fluid from flowing from reservoir 166 through third opening 134 and via line 168 into the inner chamber 106. In the open position, the fourth valve 170 allows the second fluid to pass from reservoir 166 to the inner chamber 106.

[0027] Although accumulator 102 includes two openings (i.e., openings 132 and 134) for directing fluid to and from transmission 162, in other embodiments, lines 160 and 168 may be in fluid communication with the second section 123 via a single opening. In such an embodiment, valves 158 and 170 may be in communication with the section described above. Figure 1 The accumulator 102 is described in a similar manner to control the fluid flowing into and out of the second section 123.

[0028] Three pressure sensors are used to measure the pressure within the internal chamber 106. A first pressure sensor 172 senses the pressure of a first fluid within the first segment 121. The location of the first pressure sensor 172 in the body 104 is chosen such that the pressure of the first fluid can be detected by the first pressure sensor 172 during operation of the system 100, regardless of the position of the piston 112. For example, the location where the first sensor 172 in the body 104 senses the fluid pressure of the first fluid during operation of the system 100 is chosen such that it is exposed to the first fluid even when the piston 112 is fully displaced in the direction of arrow 130. In the illustrated example, the first pressure sensor 172 is coupled to the body 104 and extends into the first portion 108 of the internal chamber 106. In other embodiments, other configurations may be used. For example, in some embodiments, the first pressure sensor 172 may be flush with the inner surface of the body 104 and therefore not extend into the internal chamber 106.

[0029] The second sensor 174 senses the pressure of the second fluid in the second segment 123. The location where the second pressure sensor 174 in the body 104 senses the pressure of the second fluid is selected such that the second sensor 174 can sense the pressure of the second fluid during operation of the system 100, regardless of the position of the piston 112. In the illustrated example, the second pressure sensor 174 is coupled to the body 104 and extends into the second portion 110 of the internal chamber 106. In other embodiments, other configurations may be used. For example, in some embodiments, the second pressure sensor 174 may be flush with the inner surface of the body 104 and therefore does not extend into the internal chamber 106.

[0030] The third pressure sensor 176 senses the pressure of the gas contained in the third segment 125. In some embodiments, nitrogen may be used. Other dry air may be used. In still other embodiments, other gases or mixtures of gases may be used. The location where the third pressure sensor 176 in the body 104 senses the gas pressure is selected such that the gas pressure is detectable during operation of the system 100, regardless of the position of the piston 112. In the illustrated example, the third pressure sensor 176 is coupled to the body 104 and extends into the third portion 125 of the internal chamber 106. In other embodiments, other configurations may be used. For example, in some embodiments, the third pressure sensor 176 may be flush with the inner surface of the body 104 and therefore not extend into the internal chamber 106. The gas contained in the third segment 125 is introduced into the internal chamber 106 and compressed to a selected pressure. The gas may be compressed by the piston 112 in response to the introduction of a first fluid into the first segment 121.

[0031] Any or all of the first pressure sensor 172, the second pressure sensor 174, or the third pressure sensor 176 may be coupled to the body 104 and may be in contact with the corresponding fluid (liquid or gas). In other embodiments, any or all of the first pressure sensor 172, the second pressure sensor 174, or the third pressure sensor 176 may be located at a distance from the body 104 and coupled to the body via a conduit.

[0032] System 100 also includes a controller 180. In some embodiments, controller 180 is an electronic computer system that operates to control various aspects of system 100 based on received information. Specifically, in the illustrated example, controller 180 receives signals such as those from pressure sensors 172, 174, and 176 and transmits these signals to control components of system 100, such as actuating valves 152, 154, 158, and 170. Controller 180 may be one of the components described below and as follows: Figure 4The figure illustrates a type of computer system 400. Controller 180 includes memory 182 and processor 184. Although memory 182 is shown as being included within controller 180, in some embodiments, memory 182 may be separate from controller 180 and communicatively coupled to controller 180 via a wired or wireless connection. For example, in some embodiments, memory 182 may be located remotely.

[0033] Memory 182 communicates with processor 184 and is used to store software and information (such as information in data form). Processor 184 is operable to execute programs and receive information from memory 182 and send information to memory 182. Although a single memory 182 and a single processor 184 are illustrated, in other embodiments, multiple memories, processors, or both may be used. Display 186 is coupled to controller 180. Display 186 may be used to present information to a user, or the display may include a touchscreen, and display 186 may be used as an input device. Display 186 may include a graphical user interface, described in more detail below, which allows a user to interact with an application executed by processor 184. Input device 188 is also coupled to controller 180. A user can use input device 188 to input information to controller 180. Memory 182 stores programs (such as application 186) and other information 188 (such as information in data form).

[0034] The controller 180 controls the operation of the system 100, such as the actuation of valves 152, 154, 158, and 170, based at least in part on information sensed by pressure sensors 172, 174, and 176. Exemplary operation of the system 100 is described in more detail below.

[0035] Figure 2 This is a flowchart of an exemplary method 200 for performing machine operations using an energy storage device. In this example, method 200 involves using an energy storage device to perform a gear shifting operation of a transmission. In describing method 200, reference may be made to exemplary system 100 and portions thereof. However, the scope of this disclosure is not so limited. Rather, method 200 can be applied to any system within the scope of this disclosure. Thus, system configurations different from those of exemplary system 100 can be used and are within the scope of this disclosure.

[0036] Prior to operation, the gas in the third section 125 is compressed to a selected pre-charge pressure. The pre-charge pressure corresponds to a selected location of the piston 112 along the length of the body 104, such as the location of the second end portion 116. At 202, the gas is compressed to a first selected pressure. This first selected pressure exceeds the pre-charge gas pressure. The selected pressure can be chosen to provide sufficient energy to the second fluid to perform a selected number of gear shifts before the gas needs to be repressurized. For example, the gas can be compressed by the first fluid to the selected pressure to provide 5 to 10 gear shifts. In other embodiments, the selected pressure may provide additional or fewer gear shifts.

[0037] A first fluid is used to compress the gas; in some embodiments, the first fluid may be system hydraulic fluid. In some embodiments, the first fluid may have a pressure ranging from 3000 psi (20.7 MPa) to 3600 psi (24.8 MPa). However, this pressure range is provided by way of example only. Other pressure ranges may be used in other embodiments. Reference Figure 1 First valve 152 is placed in the open position and second valve 154 is held in the closed position. As a result, first fluid enters first segment 121 via first opening 126. Third valve 158 is held in the closed position, and fourth valve 170 is moved to the open position. As a result, piston 116, in response to introducing pressurized first fluid into first segment 121, is displaced in the direction of arrow 136, which causes second fluid to be drawn from reservoir 166 into second segment 123 via the open fourth valve 170 and third opening 134. Piston 112 compresses the gas to a selected pressure. In some embodiments, the gas can be compressed to pressures ranging from 250 psi (1.72 MPa) to 450 psi (3.10 MPa). However, this pressure range is provided only as an example. In other embodiments, the pressure range can be extended to pressures below 250 psi (1.72 MPa) or above 450 psi (3.10 MPa). Furthermore, the pressure to which the gas is compressed can be selected based on, for example, the number of machine operations to be performed using the energy stored in the compressed gas. For instance, where a second fluid is used to perform gear shifting operations in a transmission, a consideration that can be used to determine the first selected pressure to which the gas is compressed could be the number of gear shifts performed by the transmission using the second fluid and the energy stored in the compressed gas before the compressed gas has reached the second selected pressure. The second selected pressure could correspond to a pressure at which the gas's energy is insufficient to achieve further gear shifts, or it could be a pressure level selected to repressurize the gas to the first selected pressure.

[0038] At point 204, gas compression stops when the pressure of the compressed gas reaches the first selected pressure. A third sensor 176 senses the pressure of the compressed gas and sends information to the controller 180. When the pressure sensed by the third sensor 176 reaches the selected pressure, the controller 180 closes the first valve 152 and opens the second valve 154. As a result, the pressure applied to the first fluid contained in the first segment 121 is removed, thereby stopping the movement of the piston 112 in the direction of arrow 136. Additionally, with the second valve 154 open, the first fluid is allowed to be discharged back into the reservoir 142. The controller 180 also closes the fourth valve 170 when the sensed pressure of the compressed gas reaches the selected pressure. Closing the fourth valve 170 prevents the piston 112 from moving in the direction of arrow 130 until a gear shift is desired.

[0039] At 206, the system detects when the operation of the machine will be performed. In this example, the machine is a transmission, and the operation is shifting gears in the transmission. For example, controller 180 may receive a signal from transmission 162 or from another source indicating that a gear shift will be performed. For example, the transmission may be part of a vehicle, and the signal that causes the transmission to shift gears may be received by controller 180 from sensors in the vehicle, another computer in the vehicle, user input (such as to user input in the vehicle), another source on-board to the vehicle, or outside the vehicle.

[0040] At 208, the second fluid is displaced by compressed gas to perform machine operations. In this example, when controller 180 receives an indication that a shift operation is to be performed, controller 180 opens third valve 158, allowing the second fluid to flow through line 160. With third valve 158 in the open position, the compressed gas contained in third section 125 expands, causing piston 112 to shift in the direction of arrow 130, forcing a portion of the second fluid contained in second section 123 into line 160 and to clutch 164, enabling clutch 164 to operate the gears of transmission 162 and shift gears. The amount of second fluid used to operate clutch 164 is collected in reservoir 166 after use. The second fluid contained in reservoir 166 is used to refill second section 123 when the gas is repressurized.

[0041] At 210, when the machine operation is complete, the displacement of the second fluid by the compressed gas is stopped. Thus, in this example, the controller 180 can receive a signal from the transmission 162 or from another source as described above, indicating that a shift in the transmission 162 is complete. In response, the controller 180 sends a signal to the third valve 158 to move the third valve 158 to the closed position. As a result, the expansion of the gas and (correspondingly) the movement of the piston 112 in the direction of arrow 130 are stopped. In some embodiments, the amount of energy in the compressed gas used to shift the transmission is less than the total amount stored in the compressed gas. Therefore, in some embodiments, the energy contained in the compressed gas can be used to perform multiple shifts before the gas is repressurized by the first fluid.

[0042] At 212, it is determined whether any additional operation of the machine will be performed. For example, in the context of the vehicle's transmission, if the vehicle remains in operation, such as if the vehicle's engine continues to operate, additional gear shifts in the transmission may occur. Therefore, if additional operation of the machine will be performed, such as if additional gear shifts in the transmission may occur in the future, method 200 moves to 214. If no additional operation will be performed, method 200 ends.

[0043] At 214, it is determined whether the pressure of the compressed gas has reached the second selected pressure. Within the context of the described example, controller 180 may receive a signal from third pressure sensor 176 indicating the pressure of the gas. In some embodiments, the pressure signal may be continuously sampled or sampled at a selected frequency. Controller 180 compares the received pressure signal with the second selected pressure. When the gas pressure reaches or drops below the second selected pressure, controller 180 operates system 100 to repressurize the compressed gas. If the pressure signal is above the second selected pressure, repressurization of the compressed gas is not necessary. The second selected pressure is less than the first selected pressure. In some embodiments, the second selected pressure is greater than the pre-fill gas pressure.

[0044] If the result of 214 is "No," i.e., the pressure of the compressed gas is not at or below the second selected pressure, then method 200 returns to 206, and method 200 continues as described above. If the result of 214 is "Yes," i.e., the pressure of the compressed gas is at or below the second selected pressure, then the method returns to 202, where the gas is repressurized by the first fluid, as discussed above. Specifically, in the context of this example, to repressurize the gas, controller 180 sends a signal to the second valve 154 to move to the closed position, a signal to the first valve 152 to move to the open position, and a signal to the fourth valve 170 to move to the open position. As described above, the pressurized first fluid is guided via line 150 to the first section 121, causing piston 112 to move in the direction of arrow 136, drawing the second fluid via line 168 into the second section 123, and compressing the gas in the third section 125.

[0045] Figure 3 This is another exemplary system 300 that uses an energy storage device to operate the transmission. Components in system 300 that are identical to those in system 100 are identified with the same markings as those in [the original text]. Figure 1 The same corresponding reference numerals are used in the system 300 and... Figure 1 The system is identical to system 100, except that it includes a second accumulator 302 in fluid communication with line 160. The second accumulator 302 is sized and operated to provide a volume of second fluid to clutch 164 of transmission 162 to perform a shift operation while the gas in the third section 125 of the first accumulator 102 undergoes repressurization. Transmission shifts can be performed when the first accumulator cannot otherwise deliver the second fluid to transmission 162 due to the gas being repressurized by the first fluid. Thus, the second accumulator 302 avoids delays in transmission shifts while the gas in the first accumulator 102 is being repressurized. Furthermore, the second accumulator 302 can be sized to be operable to perform multiple shift operations before being refilled. The second accumulator 302 is refilled by the second fluid displaced from the first accumulator 102 during operation of the first accumulator 102.

[0046] Furthermore, the second accumulator 302 can provide a pressure source for gradually reducing the pressure of the second fluid (referred to as gradual "leakage"). For example, hydraulic components extending between the first accumulator 102 and the transmission 162 (which may include the transmission 162 itself) may cause the fluid pressure to decrease over time. Such a pressure decrease may, for example, be the result of poor sealing (such as a seal formed by an O-ring). Therefore, the second accumulator 302 provides a pressure level maintained within these hydraulic components between shift operations of the transmission 162.

[0047] Figure 4 This is a block diagram of an exemplary computer system 400, according to some embodiments of the present disclosure, for providing computational functionality associated with the algorithms, methods, functions, processes, flows, and programs described herein. The illustrated computer 402 is intended to encompass any computing device, including physical instances and virtual instances or both, such as a server, desktop computer, laptop / notebook computer, wireless data port, smartphone, personal data assistant (PDA), desktop computing device, or one or more processors located within such devices. Computer 402 may include input devices capable of receiving user information, such as a keypad, keyboard, and touchscreen. Furthermore, computer 402 may include output devices capable of transmitting information associated with the operation of computer 402. Information may include digital data, visual data, audio information, or a combination of information. Information may be presented in a graphical user interface (UI) (or GUI).

[0048] Computer 402 may serve as a client, network component, server, database, permanent, or component of a computer system for performing the subjects described in this disclosure. The illustrated computer 402 is communicatively connected to network 430. In some embodiments, one or more components of computer 402 may be configured to operate in different environments, including cloud-based environments, local environments, global environments, and combinations thereof.

[0049] Computer 402 is an electronic computing device capable of receiving, transmitting, processing, storing, and managing data and information associated with the described subject at a high level. According to some embodiments, computer 402 may also include an application server, an email server, a network server, a cache server, a streaming data server, or a combination of such servers, or be communicatively connected to them.

[0050] Computer 402 may receive requests from network 430 from a client application (e.g., executed on another computer 402). Computer 402 may process the received requests and respond to them using software applications. Requests may also be sent from internal users (e.g., from a command console) to computer 402, external parties (or third parties), automated applications, entities, individuals, systems, and computers.

[0051] Each component of computer 402 can communicate using system bus 403. In some implementations, any or all components of computer 402 (including hardware or software components) can interact with each other or with interface 404 (or a combination of both) on system bus 403. The interface can use application programming interface (API) 412, service layer 413, or a combination of API 412 and service layer 413. API 412 may include specifications for routines, data structures, and object classifications. API 412 may be a computer-independent language or a computer-dependent language. API 412 may involve a complete interface, a single function, or a set of APIs.

[0052] Service layer 413 can provide software services to computer 402 and other components (whether illustrated or not) communicatively connected to computer 402. The functionality of computer 402 allows all server users or consumers to access this service layer. Software services (such as those provided by service layer 413) can provide reusable, defined functionality through defined interfaces. For example, the interface can be software written in JAVA, C++, or a language that provides data in Extensible Markup Language (XML) format. Although illustrated as an integrated component of computer 402, in alternative embodiments, API 412 or service layer 413 can be a separate component relative to computer 402 and communicatively connected to other components of computer 402. Furthermore, any or all portions of API 412 or service layer 413 can be implemented as a submodule or sub-module of another software module, enterprise application, or hardware module without departing from the scope of this disclosure.

[0053] Computer 402 includes interface 404. Although in Figure 4 The diagram illustrates a single interface 404, but two or more interfaces 404 may be used depending on specific needs, the desired or particular implementation of the computer 402 and the described functionality. Interface 404 can be used by computer 402 to communicate with other systems connected to network 430 (whether illustrated or not) in a distributed environment. Typically, interface 404 may include, or be implemented using, logic operable to communicate with network 430. More specifically, interface 404 may include software supporting one or more communication protocols associated with the communication. Thus, the hardware of network 430 or the interface may be operable to convey physical signals, either inside or outside the illustrated computer 402.

[0054] Computer 402 includes processor 405. Although in Figure 4The diagram shows a single processor 405, but two or more processors 405 may be used depending on specific needs, the desired or specific implementation of the computer 402 and the described functions. Generally, processor 405 can execute instructions and manipulate data to perform operations of computer 402, including operations using algorithms, methods, functions, processes, flows and programs as described in this disclosure.

[0055] Computer 402 also includes database 406, which can store data for computer 402 and other components (whether illustrated or not) connected to network 430. For example, database 406 can be an in-memory database, a conventional database, or a database storing data consistent with this disclosure. In some embodiments, database 406 can be a combination of two or more different database types (e.g., a mixture of in-memory databases or conventional databases) desired or specific implementations based on particular needs, computer 402, and the described functionality. Although in Figure 4 The illustration shows a single database 406, but two or more databases (of the same type, different types, or combinations thereof) may be used depending on specific needs, the desired or specific implementation of the computer 402 and the described functions. Although database 406 is shown as an internal component of computer 402, in alternative embodiments, database 406 may be external to computer 402.

[0056] Computer 402 also includes memory 407, which can hold data for computer 402 or a combination of components connected to network 430 (whether illustrated or not). Memory 407 can store any data consistent with this disclosure. In some embodiments, memory 407 may be a combination of two or more different types of memory (e.g., a combination of semiconductor and magnetic memory) desired or specific implementations of computer 402 and the described functions, depending on particular needs. Figure 4 The illustration shows a single memory 407, but two or more memories 407 (of the same type, different types, or combinations thereof) may be used depending on specific needs, the desired or specific implementation of the computer 402 and the described functions. Although memory 407 is shown as an internal component of computer 402, in alternative embodiments, memory 407 may be external to computer 402.

[0057] Application 408 may be an algorithmic software engine that provides functionality according to specific needs, the desired or specific implementation of the computer 402 and the described functions. For example, application 408 may be used as one or more components, modules, or applications. Furthermore, although illustrated as a single application 408, application 408 may be implemented as multiple applications 408 on the computer 402. Additionally, although illustrated as being inside the computer 402, in alternative implementations, application 408 may be outside the computer 402.

[0058] Computer 402 may also include a power supply 414. Power supply 414 may include a rechargeable or non-rechargeable battery that can be configured to be user-replaceable or user-non-replaceable. In some embodiments, power supply 414 may include power conversion and management circuitry, including recharging, standby, and power management functions. In some embodiments, power supply 414 may include a power plug that allows computer 402 to be plugged into a wall outlet or power source to, for example, power computer 402 or recharge a rechargeable battery.

[0059] Any number of computers 402 may exist, either associated with or outside the computer system containing computer 402, and each computer 402 may communicate on network 430. Furthermore, the terms "client," "user," and other suitable terms may be used interchangeably as appropriate without departing from the scope of this disclosure. Moreover, this disclosure contemplates that many users may use one computer 402 and that one user may use multiple computers 402.

[0060] The described implementation of the subject matter may include one or more features, either individually or in combination.

[0061] For example, in a first embodiment, the computer-implemented system includes one or more processors and a non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium being coupled to one or more processors and storing programming instructions executed by one or more processors, the programming instructions instructing one or more processors to: compress gas in an accumulator to a selected pressure using a first fluid; pressurize a second fluid using the compressed gas; apply the pressurized second fluid to a transmission; and operate the transmission using the pressurized second fluid.

[0062] Each of the previously described and other embodiments may optionally include one or more of the following features:

[0063] The first feature, in combination with any of the following features, wherein the programming instructions instructing one or more processors to pressurize the gas in the accumulator to a selected pressure with a first fluid include program instructions instructing one or more processors to: introduce the first fluid into a first portion of the accumulator; and displace a piston within the accumulator to pressurize the gas contained in a second portion of the accumulator.

[0064] A second feature in combination with any one or more of the following features, wherein the piston includes a first end disposed in a first portion of the accumulator and a second end disposed in a second portion of the accumulator.

[0065] A third feature in combination with any one or more of the following features, wherein the second fluid is disposed between the first end of the piston and the second end of the piston.

[0066] A fourth feature, combined with one or more of the features, the method includes programming instructions for instructing one or more processors to reduce the pressure of the first fluid when the gas is compressed to a selected pressure.

[0067] A fifth feature, in combination with any one or more of the following features, wherein the programming instructions instructing one or more processors to apply a boosted second fluid to the transmission include programming instructions to cause one or more processors to open a valve and allow the boosted second fluid to flow through the open valve to the transmission in response to piston displacement by compressed gas.

[0068] A sixth feature, in combination with one or more of the following features, wherein the selected pressure is chosen to accommodate the selected number of operations of the transmission before performing gas recompression.

[0069] A seventh feature, in combination with any one or more of the features below, wherein the programming instructions instructing one or more processors to compress the gas in the accumulator to a selected pressure using a first fluid include programming instructions instructing one or more processors to allow a second fluid to flow into the internal chamber of the accumulator when the gas is compressed by the first fluid, in the portion formed between a first end and a second end of a piston disposed in the internal chamber.

[0070] An eighth feature in combination with one or more of the following features, wherein the first fluid is a system hydraulic fluid and wherein the second fluid is a transmission fluid.

[0071] A ninth feature, in combination with any of the above features, wherein the computer programming instructions instructing one or more processors to operate the transmission with a boosted second fluid include programming instructions instructing one or more processors to shift gears in the transmission.

[0072] The embodiments of the subject matter and functional operation described in this specification can be implemented as digital electronic circuits, tangibly embodied computer software or firmware, computer hardware (including the structures disclosed in this specification and their structural equivalents), or one or more combinations thereof. Software embodiments of the described subject matter can be implemented as one or more computer programs. Each computer program may include one or more modules of computer program instructions encoded on a tangible, non-transitory, computer-readable computer storage medium, which are executed by a data processing device or used to control the operation of a data processing device. Alternatively or additionally, the program instructions may be encoded in or on artificially generated propagated signals. For example, the signals may be machine-generated electrical, optical, or electromagnetic signals generated to encode information about the transmission to a suitable receiver device for execution by the data processing device. The computer storage medium may be a machine-readable storage device, a machine-readable storage substrate, a random or serial access storage device, or a combination of computer storage media.

[0073] The terms “data processing apparatus,” “computer,” and “electronic computer equipment” (or equivalents, as understood by one of ordinary skill in the art) refer to data processing hardware. For example, a data processing apparatus can encompass all kinds of devices, apparatuses, and machines for processing data, including, for example, programmable processors, computers, or multiple processors or computers. The apparatus may also include special-purpose logic circuitry, including, for example, a central processing unit (CPU), a field-programmable gate array (FPGA), or an application-specific integrated circuit (ASIC). In some embodiments, the data processing apparatus or special-purpose logic circuitry (or a combination of data processing apparatus or special-purpose logic circuitry) may be hardware-based or software-based (or a combination of both). The apparatus may optionally include code that generates an execution environment for computer programs, such as code that constitutes processor firmware, protocol suites, database management systems, operating systems, or combinations of execution environments. This disclosure contemplates the use of data processing apparatuses with or without conventional operating systems (e.g., LINUX, UNIX, WINDOWS, MAC OS, ANDROID, or IOS).

[0074] Computer programs can be written in any programming language, and a computer program can also refer to or be described as a program, software, software application, module, software module, script, or code. Programming languages ​​can include, for example, compiled languages, interpreted languages, declarative languages, or procedural languages. Programs can be configured in any form, including as standalone programs, modules, components, subroutines, or units used in a computing environment. A computer program may, but does not necessarily, correspond to a file in a file system. A program may be stored as part of a file containing other programs or data (e.g., stored in one or more scripts in a markup language file), in a single file dedicated to the program under discussion, or in multiple coordination files storing one or more modules, subroutines, or code portions. A computer program can be configured to execute on one or more computers located at, for example, a single point, or distributed across multiple points interconnected by a communication network. While the parts of a program illustrated in the various figures may be shown as separate modules implementing various features and functions through various objects, methods, or procedures, programs may alternatively include multiple submodules, third-party services, components, and libraries. Conversely, the features and functions of individual components may be combined into a single component as appropriate. The threshold used for calculation can be determined in a static, dynamic, or a combination of both methods.

[0075] The methods, processes, and logical flows described in this specification can be executed by one or more programmable computers, which execute one or more computer programs to perform functions by manipulating input data and generating inputs. The methods, processes, or logical flows can also be executed by special-purpose logic circuitry (e.g., a CPU, FPGA, or ASIC), and the devices can also be implemented as special-purpose logic circuitry.

[0076] A computer suitable for executing computer programs can be based on one or more general-purpose and special-purpose microprocessors, as well as other types of CPUs. The components of a computer are a CPU for executing or implementing instructions and one or more storage devices for storing instructions and data. Typically, the CPU can receive instructions and data from memory (and write data to memory). A computer can also include or be operatively coupled to one or more mass storage devices for storing data. In some embodiments, the computer can receive data from and transfer data to the mass storage device, which includes, for example, a magnetic disk, magneto-optical disk, or optical disk. Furthermore, the computer can be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device (such as a universal serial bus (USB) flash drive).

[0077] Computer-readable media (temporary or non-temporary, as the case may be) suitable for storing computer program instructions and data can include all forms of permanent / non-permanent and volatile / non-volatile memory, media, and storage devices. Computer-readable media can include, for example, semiconductor memory devices such as random access memory (RAM), read-only memory (ROM), phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices. Computer-readable media can also include, for example, magnetic devices such as magnetic tape, cassette tape, cassette recording tape, and internal / removable disks. Computer-readable media can also include magneto-optical disks and optical storage devices, as well as technologies including, for example, digital video discs (DVDs), CD-ROMs, DVD+ / -R, DVD-RAM, DVD-ROM, HD-DVD, and BLURAY. Memory can store various objects or data, including caches, classes, frames, applications, modules, backup data, jobs, web pages, web page templates, data structures, database tables, repositories, and dynamic information. The various types of objects and data stored in memory can include parameters, variables, algorithms, instructions, rules, constraints, and references. Additionally, memory can include logs, policies, security or access data, and report files. Processors and memory can be supplemented by or integrated into dedicated logic circuitry.

[0078] Embodiments of the subject matter described in this disclosure can be implemented on a computer having a display device for providing interaction with a user, including displaying information to the user (and receiving input from the user) . Various types of display devices may include, for example, cathode ray tubes (CRTs), liquid crystal displays (LCDs), light-emitting diodes (LEDs), and plasma monitors. The display device may include a keyboard and pointing devices, including, for example, a mouse, trackball, or touchpad. User input may also be provided to the computer using a touchscreen, such as a pressure-sensitive tablet computer surface, or a multi-touch screen using capacitive or inductive sensing. Another type of device can be used to provide interaction with the user, including receiving user feedback, including, for example, sensory feedback, which may include visual, auditory, or tactile feedback. Input from the user may be received in the form of sound, speech, or tactile input. Additionally, the computer can interact with the user by sending files to and receiving files from the user's device. For example, the computer may send a webpage to a web browser on a user's client device in response to a request received from a web browser.

[0079] The term "graphical user interface" or "GUI" can be used in the singular or plural to describe one or more graphical user interfaces, and each display for a particular graphical user interface. Therefore, a GUI can represent any graphical user interface, including but not limited to a web browser, a touchscreen, or a command-line interface (GLI) that processes information and efficiently presents the results to the user. Typically, a GUI may include multiple user interface (UI) elements, such as interactive fields, dropdown lists, and buttons, some or all of which are associated with a web browser. These and other UI elements may be related to or represent the functionality of the web browser.

[0080] Implementations of the subject matter described in this specification can be implemented in computing systems that include back-end components (e.g., as a data server) or middleware components (e.g., an application server). Furthermore, the computing system may include front-end components, such as a client computer having one or both of a graphical user interface or a web browser through which a user can interact with the computer. Components of the system can be interconnected via wired or wireless digital data communication (or a combination of data communications) of any form or medium in a communication network. Examples of communication networks include local area networks (LANs), radio access networks (RANs), metropolitan area networks (MANs), wide area networks (WANs), WiMAX, wireless local area networks (WLANs) (e.g., using 802.11a / b / g / n or 802.20, or combinations thereof), all or part of the Internet, or any other one or more communication systems (or combinations thereof) located in one or more locations. The network can communicate with combinations of communication types, such as Network Protocol (IP) packets, Frame Relay frames, Asynchronous Transfer Mode (ATM) cells, voice, video, data, or network addresses.

[0081] A computing system may include clients and servers. Clients and servers can typically be geographically separated and can interact via communication networks. The client-server relationship can be established by computer programs running on their respective computers and having a client-server relationship.

[0082] A clustered file system can be any file system type that can be accessed from multiple servers for reading and updating. Locking or consistency tracking may not be necessary, as locking of the swap file system can be done at the application layer. Furthermore, Unicode data files can differ from non-Unicode data files.

[0083] While this specification contains numerous specific implementation details, these details should not be construed as limiting the scope of possible claims, but rather as descriptions of features that may be specific to particular embodiments. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, individual features described in the context of a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. Furthermore, while previously described features may be described as functioning in certain combinations and even as initially claimed, in some cases, one or more features from the claimed combination may be extracted from the combination, and the claimed combination may be for sub-combinations or variations thereof.

[0084] Specific embodiments of the subject matter have been described. It will be apparent to those skilled in the art that other embodiments, modifications, and substitutions of the described embodiments are within the scope of the appended claims. Although the operations are described in a specific order in the drawings or claims, this should not be construed as requiring that such operations be performed in the specific order shown or in a sequential order, or that all illustrated operations (some operations may be considered optional) be performed to achieve the desired result. In some cases, multitasking or parallel processing (or a combination of multitasking and parallel processing) may be advantageous and performed where deemed appropriate.

[0085] Furthermore, the separation or integration of the various system modules and components in the previously described embodiments should not be construed as requiring such separation or integration in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0086] Without limiting the scope, interpretation, or application of the claims appearing below in any way, the technical effect of one or more exemplary embodiments disclosed herein is to provide actuation of a machine (such as a transmission) while avoiding the energy loss associated with a continuously operating pump (which would otherwise be used to power the drive).

[0087] Furthermore, any claimed implementation is considered to be applicable at least to: a computer-implemented method; a non-transitory computer-readable medium storing computer-readable instructions for performing the computer-implemented method; and a computer system including a computer memory interoperable with a hardware processor configured to perform the computer-implemented method or execute instructions stored on a non-transitory computer-readable medium.

[0088] While exemplary embodiments of this disclosure have been described above, these descriptions should not be construed as limiting. Rather, other changes and modifications may be made without departing from the scope and spirit of this disclosure as defined in the appended claims.

Claims

1. A system (100, 300) for pressurizing fluid used to perform machine operations, the system comprising: The source of the first fluid after pressurization; and An accumulator (102) in fluid communication with the pressurized first fluid, the accumulator comprising a gas compressible in response to the pressurized first fluid, and a second fluid flowing from the accumulator to the machine in response to the compressed gas for operation of the machine, wherein the accumulator includes: A body (104) defining an internal chamber (106) and comprising: First endwall (128); and Second end wall (178); and A piston (112) disposed in and movable within the internal chamber divides the internal chamber into a first segment (121) in fluid communication with the pressurized first fluid, a second segment (123) in fluid communication with the second fluid, and a third segment (125) containing the compressed gas; and The first segment (121) is formed between the first end wall and the first end portion (114) of the piston (112), the second segment (123) is formed between the first end portion of the piston and the second end portion (116) of the piston, and the third segment (125) is formed between the second end wall and the second end portion of the piston.

2. The system (100, 300) according to claim 1, wherein, The internal chamber (106) includes: The first portion (108) that defines the size of the first cross-section; and A second portion (110) that is opposite to the first portion and has a second cross-sectional size that is larger than the first cross-sectional size; in, The first end portion (114) of the piston (112) is disposed in the first portion; and The second end portion (116) of the piston (112) is disposed in the second portion.

3. The system according to claim 1, wherein, The first segment (121) is in communication with the source fluid of the pressurized first fluid.

4. The system according to claim 1, wherein, The second segment (123) is in fluid communication with the second fluid.

5. The system of claim 1, further comprising a first opening (126) formed in the body (104) to provide fluid communication between the first segment (121) and a source of the pressurized first fluid, the first fluid being directed via the first opening into the first segment of the internal chamber (106) to displace the piston (112) in a first direction thereby compressing the gas.

6. The system according to claim 5, wherein, The machine is a transmission (162), and the system further includes: A second opening (132) formed in the body (104) and in fluid communication with a second segment (123) of the internal chamber (106), the second opening being in fluid communication with a reservoir (166) containing the second fluid, the second fluid being able to flow from the reservoir into the second segment through the second opening in response to movement of the piston (112) in response to the pressurized first fluid; and A third opening (134) is formed in the body and in fluid communication with a second segment of the internal chamber. The third opening is in fluid communication with a clutch (164) of the transmission (162). The second fluid, pressurized by the compressed gas, can flow through the third opening to the clutch in response to movement of the piston in a second direction opposite to the first direction, so as to facilitate operation of the clutch.

7. The system according to any one of claims 1 to 6, wherein, The first fluid has a pressure greater than that of the compressed gas, so as to compress the compressed gas to the selected pressure.

8. The system according to claim 1 further includes a piston (112) disposed in and movable within the internal chamber (106) of the accumulator (102). in, The first fluid is delivered through a first opening (126) into a first segment (121) of the internal chamber (106). The first fluid is introduced into the first segment at a pressure greater than that of the compressed gas, such that the first fluid causes the piston to shift in a first direction to compress the compressed gas to a selected pressure. When the piston moves along a second direction opposite to the first direction, the second opening (132) into the internal chamber is in an open configuration, the second fluid is received into the second segment (123) of the internal chamber via the second opening in response to the piston moving along the second direction, and the third opening (134) into the internal chamber is in a closed configuration when the piston moves along the second direction.

9. A method for pressurizing a fluid used to perform machine operations using the system (100, 300) according to any one of claims 1 to 8, wherein, The machine is a transmission (162), and the method includes: The gas in the accumulator (102) is compressed to a selected pressure using a first fluid, wherein the process of pressurizing the gas in the accumulator (102) to the selected pressure using the first fluid includes: The first fluid is introduced into the first section (121) of the accumulator; and The piston (112) is displaced within the accumulator to pressurize the gas contained in the third section (125) of the accumulator; wherein, The piston (112) includes a first end portion (114) disposed in a first part (108) of the accumulator (102) and a second end portion (116) disposed in a second part (110) of the accumulator, wherein, The second fluid is disposed between the first end portion (114) and the second end portion (116) of the piston (112); The second fluid is pressurized using compressed gas; A second fluid pressurized after being applied to the transmission; and The transmission is operated using the pressurized second fluid.

10. The method according to claim 9, wherein, Compressing the gas in the accumulator (102) to a selected pressure using a first fluid includes: when the gas is compressed by the first fluid, causing a second fluid to flow into a second segment (123) formed in the internal chamber (106) of the accumulator between a first end portion (114) of the piston (112) disposed in the internal chamber and a second end portion (116) of the piston.

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