Hydraulic unit configured as a starter motor

Abstract

A hydraulic device is disclosed. The hydraulic device may include a rotor, a plurality of blades, and a ring. The ring may include a suction chamber and a pressure chamber. The suction chamber and the pressure chamber may be configured for inflow and outflow of hydraulic fluid through the ring. The ring may include a suction port completely defined by the ring and in fluid communication with the suction chamber. The suction port may be configured to receive hydraulic fluid from a first area between the ring and the rotor. The ring may include a pressure port completely defined by the ring and in fluid communication with the pressure chamber. The pressure port may be configured to allow hydraulic fluid to flow from the pressure chamber to a second area between the ring and the rotor.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. application serial number 62 / 945,946 filed on December 10, 2019, which is incorporated herein by reference in its entirety.

[0003] The present application is also related to a number of patent applications, including: International Application No. PCT / IB2010 / 003161 filed on November 19, 2010, entitled “Hydrostatic Torque Converter and Torque Amplifier”; International Application No. PCT / AU2007 / 000772 filed on June 1, 2007, published as WO / 2007 / 140514, entitled “Vane Pump for Pumping Hydraulic Fluid”; International Application No. PCT / AU2006 / 000623 filed on May 12, 2006, published as WO / 2006 / 119574, entitled “Improved Vane Pump ... VanePump)"; International application number PCT / AU2004 / 00951 filed on July 15, 2004, published as WO / 2005 / 005782, entitled "A Hydraulic Machine"; International application number PCT / IB2016 / 000090 filed on January 18, 2016, entitled "Hydro-Mechanical Transmission With Multiple Modes of Operation"; International application number PCT / AU2016 / 000108 filed on March 24, 2016, entitled "Hydraulic The present invention relates to a patent application entitled “Hydraulic Machine with Stepped Roller Vane and Fluid Power System Including Hydraulic Machine with Starter Motor Capability” filed on February 28, 2018, and a patent application entitled “Hydraulic Machine With Stepped Roller Vane and Fluid Power System Including Hydraulic Machine With Starter Motor Capability” filed on February 28, 2018; and a patent application entitled “Hydraulically Controlled Rotator Couple” filed on December 5, 2012, and a patent application entitled “Hydraulically Controlled Rotator Couple” filed on December 5, 2012, and the entire specifications of each of the above patent applications are incorporated herein by reference in their entirety. Technical Field

[0004] The present patent application relates generally to a hydraulic device, and more particularly to a hydraulic device configured as a starter motor. Background Art

[0005] Rotary couplings are used in vehicles, industrial machines and marine applications to transmit rotating mechanical power. For example, they have been used as a replacement for mechanical clutches in automotive transmissions. The use of rotary couplings is also widespread in applications that require variable speed operation of the power transmission system and controlled starting without shock loads. Summary of the invention

[0006] Various apparatuses, systems and methods are disclosed that may employ a hydraulic device or multiple hydraulic devices. The hydraulic device(s) may be configured to be operable as a starter motor. The hydraulic device(s) may also be configured to be operable as a hydrostatic coupler and a vane pump.

[0007] The present inventors have recognized that conventional torque converters slip when subjected to high torque and low or no travel speed, such as when a backhoe is driven forward and using its bucket to plunge into a pile of material. Slippage wastes energy, reduces efficiency, and generates high heat. Conventional hydrostatic drives are designed to provide minimum displacement when operating as a pump and maximum displacement when operating as a motor. Again, such operating characteristics may have lower efficiency.

[0008] Hydraulic devices that employ vanes that are sometimes referred to as vane hydraulic devices, vane pumps, or vane couplers have been developed. For simplicity, such devices with vanes are referred to simply as hydraulic devices in some cases herein. These devices can provide improved power density and service life compared to conventional variable piston pump / motor hydraulic devices and even standard vane pumps. However, such vane hydraulic devices are not as compact as desired in some vehicle applications. This is due to the fact that in the vane hydraulic device the discharge port and the suction port are end openings through the end plate. For balance, the vane hydraulic device has at least one (if not more) discharge port and suction port at the first axial end in the first end plate and at the second axial end in the second end plate. The end plate with ports results in an overall size of the housing for the vane hydraulic device that is larger than that required for applications such as those within an engine compartment where volume is limited and a smaller, more compact device is required.

[0009] In view of these factors, the inventors have recognized a hydraulic device that is ported entirely through its ring and has no ports (suction or pressure) in the end plate (sometimes referred to as the side plate). Thus, using the designs disclosed herein, the presently discussed devices (e.g., vane hydraulic devices that can operate as pumps, couplers, and motors (e.g., starter motors)) can be placed and operated in more compact environments (e.g., engine compartments where space is limited).

[0010] The inventors have recognized a vehicle system that can use excess energy for hydraulic functions and / or store energy for later use / power regeneration, such as for use in a starter motor application of the hydraulic device disclosed herein. The increased efficiency provided by the system can allow the use of lower rated power engines and other benefits. By controlling the torque requirements of the engine, such as using the hydraulic device as a starter motor, the engine management system can have better options for providing fuel efficiency and can reduce fuel use and emissions. For example, starting and stopping torques can be reduced using the hydraulic device disclosed herein to limit high peak torque levels that can damage the machine or cause the machine to operate inefficiently.

[0011] According to some examples, a hydraulic device can be part of the system and can allow the system to operate and operate accessories in various operating modes. These operating modes can include accessory operating modes, vehicle idle / drive modes, regenerative energy storage modes, regenerative energy application modes, vane pumping modes, and starting modes. In some cases, accessories used with the vehicle system can include valves, hydraulic pump motors, accumulators, and various hydraulically operated vehicle auxiliary systems. Other examples take into account the system's fluid-connected internal parts including, for example, multiple hydraulic devices, multiple accessories, and the transmission or transmission can be coated with diamond or diamond-like carbon. This can allow the system to use more environmentally friendly hydraulic fluids, such as ethylene glycol or water-ethylene glycol.

[0012] As used herein, the term “vehicle” refers to virtually all types of vehicles, such as earth-moving equipment (e.g., wheel loaders, compact loaders, backhoes, dump trucks, lift trucks, transport mixer trucks, etc.), waste recovery vehicles, marine vehicles, industrial equipment (e.g., agricultural equipment), personal vehicles, public transportation vehicles, and commercial road vehicles (e.g., heavy-duty highway trucks, semi-trucks, etc.).

[0013] To further illustrate the devices, systems and / or methods disclosed herein, the following non-limiting examples are provided:

[0014] In Example 1, a hydraulic device is disclosed, which may include a rotor, a plurality of blades, and a ring. The rotor may be arranged to rotate about an axis. Each of the plurality of blades may be movable between a retracted position and an extended position relative to the rotor, and the plurality of blades operate a hydraulic fluid introduced adjacent to the rotor at the extended position. The ring may be arranged around at least a portion of the rotor. The ring may include a suction chamber and a pressure chamber. The suction chamber and the pressure chamber may be configured for the inflow and outflow of hydraulic fluid through the ring. The ring may include a suction port that is completely defined by the ring and is in fluid communication with the suction chamber. The suction port may be configured to receive hydraulic fluid from a first region between the ring and the rotor. The ring may include a pressure port that is completely defined by the ring and is in fluid communication with the pressure chamber. The pressure port may be configured to allow hydraulic fluid to flow from the pressure chamber to a second region between the ring and the rotor.

[0015] In Example 2, the hydraulic device as described in Example 1 further optionally includes a first end plate and a second end plate, wherein the first end plate can be connected to a first axial side of the ring and the second end plate can be connected to an opposite second side of the ring, wherein the suction chamber and the pressure chamber can be completely defined by the ring and the suction chamber and the pressure chamber can be separated from the first end plate and the second end plate of the hydraulic device.

[0016] In Example 3, the hydraulic device as described in Example 2 further optionally includes a valve assembly mounted to the ring, located near the first end plate and the second end plate and located between the first end plate and the second end plate, wherein the valve assembly can be in fluid communication with the pressure chamber and can be configured to regulate the hydraulic fluid to the pressure chamber.

[0017] In Example 4, the hydraulic device as described in any one or combination of Examples 1 to 3 further optionally includes: a first thrust bearing, which is arranged near the first axial end of the rotor; and a second thrust bearing, which is arranged near the second axial end of the rotor, and the second axial end is opposite to the first axial end.

[0018] In Example 5, the hydraulic device of any one or combination of Examples 1 to 4, wherein the suction chamber and the pressure chamber are completely defined by the ring.

[0019] In Example 6, a hydraulic device as described in any one of Examples 1 to 5, wherein the suction port may include two suction ports, the two suction ports include a first suction port and a second suction port, wherein the first suction port may be approximately located on the side of the inner diameter surface of the ring opposite to the second suction port, and wherein the pressure port may include two pressure ports spaced apart from the two suction ports, the two pressure ports include a first pressure port and a second pressure port, wherein the first pressure port may be approximately located on the side of the inner diameter surface of the ring opposite to the second pressure port.

[0020] In Example 7, a hydraulic device as described in Example 6, wherein the pressure chamber may have a single inlet defined by a ring and leading to the pressure chamber, and the pressure chamber may be divided into two parts including a first pressure part connected to the first pressure port and a second pressure part connected to the second pressure port, and wherein the suction chamber may have a single outlet defined by a ring and leading to the suction chamber, and the suction chamber may be divided into two parts including a first suction part connected to the first suction port and a second suction part connected to the second suction port.

[0021] In Example 8, the hydraulic device of Example 7, wherein one of the first pressure portion or the first suction portion is branched to bypass the other of the first pressure portion or the first suction portion.

[0022] In Example 9, the hydraulic device as described in any one or combination of Examples 1 to 8 further optionally includes a plurality of rollers, wherein each roller of the plurality of rollers can be coupled to a corresponding one of the plurality of blades at an outer end thereof.

[0023] In Example 10, the hydraulic device of any one or combination of Examples 1 to 9, wherein the plurality of blades can be configured to have one of an internal blade clamp assembly, a push pin assembly, or a stepped blade.

[0024] In Example 11, the hydraulic device of any one or combination of Examples 1 to 10, wherein the ring can be one of a generally square or rectangular shape defined by its outer surface when viewed in cross-section.

[0025] In Example 12, the hydraulic device of Example 11, wherein the ring can have a plurality of ports in the outer surface and located on at least two sides of the outer surface.

[0026] In Example 13, the hydraulic device of any one or combination of Examples 1 to 12, wherein the entire axial length of the ring is between 75 mm and 125 mm.

[0027] In Example 14, a system optionally includes:

[0028] A hydraulic device, comprising:

[0029] a rotor arranged to rotate about an axis;

[0030] a plurality of vanes, each of the plurality of vanes being movable relative to the rotor between a retracted position and an extended position, the plurality of vanes in the extended position operatively engaging hydraulic fluid introduced adjacent the rotor; and

[0031] a ring disposed at least partially around the rotor, the ring comprising:

[0032] a suction chamber and a pressure chamber, wherein the suction chamber and the pressure chamber are configured for inflow and outflow of hydraulic fluid through the ring;

[0033] a suction port completely defined by the ring and in fluid communication with the suction chamber, wherein the suction port is configured to receive hydraulic fluid from a first region between the ring and the rotor; and

[0034] a pressure port completely defined by the ring and in fluid communication with the pressure chamber, wherein the pressure port is configured to allow hydraulic fluid to flow from the pressure chamber to a second region between the ring and the rotor;

[0035] a torque generating device coupled to one of the ring or the rotor; and

[0036] An energy storage device is in fluid communication with the hydraulic device, wherein the hydraulic fluid is selectively operable to a starter motor for the torque-generative device using hydraulic fluid supplied from the energy storage device.

[0037] In Example 15, the system of Example 14, wherein the energy storage device includes an accumulator.

[0038] In Example 16, the system as described in any one or any combination of Examples 14 to 15 further optionally includes a first end plate and a second end plate, wherein the first end plate can be connected to a first axial side of the ring and the second end plate can be connected to an opposite second side of the ring, wherein the suction chamber and the pressure chamber can be completely defined by the ring, and the suction chamber and the pressure chamber can be separated from the first end plate and the second end plate of the hydraulic device.

[0039] In Example 17, the system of any one or any combination of Examples 14 to 16 further optionally includes a valve assembly in fluid communication with the pressure chamber and configured to regulate hydraulic fluid to the pressure chamber.

[0040] In Example 18, the system as described in any one or any combination of Examples 14 to 17 further optionally includes a controller operable to control a system operating mode based on a plurality of vehicle operating parameters.

[0041] In Example 19, a system as described in Example 18, wherein the system operating mode optionally includes: operating the hydraulic device as one of a hydraulic coupler or a vane pump in addition to a starting motor, and wherein the system operating mode includes: controlling the hydraulic device and one or more accessories in one or more of an accessory operating mode, a vehicle idle / drive mode, a regenerative energy storage mode, a regenerative energy application mode, a vane pumping mode and a starting mode, and the one or more accessories may include an energy storage device.

[0042] In Example 20, the system of any one or any combination of Examples 14 to 19, wherein the fluid communicating interior portion of the hydraulic device and the one or more accessories may be coated with diamond or diamond-like carbon, and wherein the hydraulic fluid comprises ethylene glycol or water-ethylene glycol.

[0043] In Example 21, the devices and systems described in any one or any combination of Examples 1 to 21 can optionally be configured so that all of the listed elements or options are available for use or selection.

[0044] These and other examples and features of the present apparatus, system and method will be described in part in the following detailed description. This summary is intended to provide an overview of the subject matter of this patent application. It is not intended to provide an exclusive or exhaustive removal of the present invention. The detailed description is included to provide additional information about this patent application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In addition, in the accompanying drawings that are not necessarily drawn to scale, similar reference numerals may describe similar components in different views. Similar reference numerals with different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments discussed herein by way of example and not limitation.

[0046] Figure 1 is a schematic diagram of a vehicle including a vehicle system having a hydraulic device and one or more accessories according to an example of the present application.

[0047] Figure 2 is a schematic diagram of a second vehicle including a second vehicle system having a hydraulic device and one or more accessories according to an example of the present application.

[0048] Figure 2A According to the example of this application Figure 2 Schematic diagram of the control system of the system.

[0049] Figure 3 is a perspective view of a hydraulic device according to an example of the present application.

[0050] Figure 3A and Figure 3B yes Figure 3 Side views of different sides of the hydraulic device.

[0051] Figure 4 yes Figure 3 A first cross-sectional view of a hydraulic device.

[0052] Figure 4A yes Figure 3 A second cross-sectional view of the hydraulic device.

[0053] Figure 4B and Figure 4C yes Figure 4A An enlarged view of the second cross-sectional view of FIG.

[0054] Figure 5 yes Figure 3 Schematic perspective view of a portion of a rotor and a plurality of blades of a hydraulic device, wherein portions of the rotor are cut away to illustrate other components of a vane hydraulic device according to an example of the present application.

[0055] Fig. 6A yes Figure 3 Schematic perspective view of a ring of a hydraulic device, wherein portions of the ring are cut away to illustrate additional features of the ring according to an example of the present application.

[0056] Figure 6B yes Fig. 6A Schematic side view of a ring. DETAILED DESCRIPTION

[0057] The present application relates to hydraulic devices and systems capable of employing (multiple) hydraulic devices. Examples disclosed herein include the present hydraulic device that can be used as one or more of a starter motor, a hydraulic coupler, a motor, or a vane pump. During a starter motor operating mode, a pilot signal can be sent to a step below the blade to push the blade outward against an annular profile as needed. The hydraulic device can be used as part of a system that can include an accumulator to operate the hydraulic device as a starter motor to start the engine at a higher speed than normal. This high-speed start can prevent or reduce excessive fuel consumption that occurs in normal low-speed starter motor systems.

[0058] U.S. patent application serial number 13 / 510,643 describes a hydraulically controllable coupling configured to couple a rotating input end to an output end for rotation. The hydraulic device can have such a function. In addition, the hydraulic device can also be switched to act as a vane pump and operate between a pumping mode and a mode in which the vane pump is not pumping. U.S. provisional patent application serial number 62 / 104,975 also describes a system and method using multiple hydraulic devices, each of which is configured to be able to operate as a hydraulic coupling and a vane pump. The entire specification of each of U.S. patent application serial number 13 / 510,643 and U.S. provisional patent application serial number 62 / 104,975 is incorporated herein by reference in its entirety.

[0059] The hydraulic devices described herein can be used with various systems (e.g., those described in U.S. Patent Application Serial No. 15 / 544,829). The hydraulic devices described herein can be used with various accessories (including hydraulic pump motors, accumulators) and various vehicle auxiliary systems, and the hydraulic devices described herein can be used as part of a system with various operating modes (including accessory operating mode, vehicle idle / drive mode, regenerative energy storage mode, regenerative energy application mode, vane pumping mode, starting mode, series torque multiplication wheel drive mode, series steady-state wheel drive mode, series vane pumping mode, regenerative energy storage mode, and regenerative energy application mode as described in U.S. Patent Application Serial No. 15 / 544,829). If multiple hydraulic devices are used, the multiple hydraulic devices can provide operational flexibility, selectively inoperable, selectively operate only as a vane pump (e.g., in maximum pump mode), operate only as a hydraulic coupler (e.g., in maximum drive mode), can operate as a vane pump and a hydraulic coupler (e.g., in variable pump and drive mode), and operate as a vane pump with variable displacement (e.g., in variable displacement mode).

[0060] Other examples not specifically discussed herein with reference to the figures may be employed. The disclosed vehicle system is applicable to various types of vehicles, such as, but not limited to, earth moving equipment (e.g., wheel loaders, compact loaders, backhoes, dump trucks, lift trucks, transport mixers, etc.), waste recovery vehicles, marine vessels, industrial equipment (e.g., agricultural equipment), personal transport vehicles, public transportation vehicles, and commercial road vehicles (e.g., heavy highway trucks, semi-trucks, etc.), as well as virtually any type of vehicle.

[0061] Figure 1A highly schematic view of a system 10 on a vehicle is shown. As will be discussed later, the system 10 may include a torque source 12, an input shaft 13, at least one hydraulic device 14, an output shaft 15, a plurality of accessories 16, a controller 18, a transmission 20, and a powertrain 22. The plurality of accessories 16 may include a pump motor 24 and one or more output shafts 26.

[0062] Figure 1 The illustration of represents one possible configuration (e.g., the hydraulic device 14 is disposed before the transmission 20 and the output shaft 15 (including the shaft 26) is coupled to the transmission 20). Other configurations are possible. The torque source 12 may include any source, including but not limited to an engine, a flywheel, an electric motor, etc. The torque source 12 may be coupled to the input shaft 13 of the hydraulic device 14. The torque source 12 may be configured to output torque / power to the hydraulic device 14 according to a variety of operating modes. However, in some cases, the hydraulic device 14 may be used as Figure 2 The starting motor shown is used to input torque / power to the torque source 12 in the starting mode (for example, if the torque source is an engine, the torque source can rotate at a certain speed so that the torque source draws fuel and air into the cylinder and compresses the fuel and air). The hydraulic device 14 can selectively transmit the torque / power of the torque source 12 to the transmission 20 or another powertrain 22 system via the output shaft 15. Although not shown in Figure 1 1, but the hydraulic device 14 can be intelligently controlled by pilot signal(s), valve(s), etc. to selectively transmit power / torque or utilize power / torque to pump hydraulic fluid to or from multiple vehicle accessories 16. The controller 18 (e.g., a vehicle ECU) can be configured to communicate with various systems and components of the system 10 and the vehicle, and can be operated to control the system operating mode based on multiple vehicle operating parameters (e.g., starting, deceleration, acceleration, vehicle speed, the desire or need to operate various auxiliary systems (including hydraulic power systems, etc.)).

[0063] Figure 1 An example is shown in which the hydraulic device 14 is in fluid communication with a plurality of accessories 16 . Figure 1 One of the accessories 16 is shown, namely a pump motor 24, which is coupled to the transmission 20 via an output shaft 26. According to further examples, the plurality of accessories 16 may include, for example, an accumulator and / or one or more auxiliary systems (e.g., a system for cooling a fan drive, a dump tank, a power steering device, a compressor system, an alternator system, a braking system, a fire extinguishing system, a hydraulic device-related system, etc.).

[0064] In one example, the pump motor 24 may include a digitally controlled piston pump. The pump motor 24 may be controlled by various methods, including but not limited to electronically, pressure compensated, levered, or digitally. The pump motor 24 is coupled to the transmission 20 via an output shaft 26 (e.g., a portion of the shaft 15), and may receive torque from the transmission 20 or apply torque to the transmission 20. According to one example, the hydraulic pump motor 24 may include a port that is in fluid communication with the discharge pressure of the hydraulic device 14. According to one mode of system operation, the pump motor 24 may receive hydraulic fluid at discharge pressure from one or more hydraulic devices 14 to propel the transmission 20. In this case, the pump motor 24 may be stroked slightly or fully; because the inlet pressure may be small, the extent of the stroke is insignificant.

[0065] Typically, the hydraulic device 14 may have a rotor body and at least a first blade configured to move relative to the rotor body. The hydraulic device may be adapted to hold the first blade in a blade retracting operating mode and to release (and / or extend) the first blade in a blade extending operating mode, in which the first blade extends to the hydraulic working fluid when the first blade moves relative to the rotor body. If the output shaft 15 is not fixed or has sufficient resistance to the coupling, the input shaft 13 and the output shaft 15 may be coupled to rotate together in the blade extending operating mode (i.e., the hydraulic device operates as a hydraulic coupler). In other operating modes, if the output shaft 15 is fixed or does not produce sufficient resistance to full coupling, the input shaft 13 and the output shaft 15 may rotate freely relative to each other in the blade extending operating mode (i.e., the hydraulic device operates as a vane pump).

[0066] according to Figure 1 In the example of , one or more hydraulic devices 14 can be operated as a hydraulic pump and therefore as part of the hydraulic system of the vehicle. Various intelligent controllers (electronic, pressure compensated, lever and / or digital) of valves, discharge valves, components, etc. can be used to control the direction and amount of hydraulic fluid flowing into and out of multiple accessories 16 and multiple hydraulic devices 14. The present system benefits from precise control. For example, a programmable torque setting affected by adjustment of the pressure relief setting results in a predetermined stall point. Such a programmable stall point can be fixed or can be set remotely by associating the safety valve setting with a remote conventional override safety valve. Another benefit of precise control can be: controlling acceleration or deceleration by changing the safety valve setting to match the required maximum torque. In such an embodiment, starting and stopping torques can be reduced to limit high peak torque levels that can damage the machinery.

[0067] According to other examples, the controller 18 can operate as a remote pressure controller. In some examples, the remote pressure controller is connected to one side of the balance piston, and the pump output end is fluidly connected to the opposite side of the balance piston. The balance piston is used to control whether the hydraulic device can pump hydraulic oil. For example, if the remote pressure controller is set to a pressure, the balance piston allows the connector discharge pressure to increase until the device discharge pressure is higher than the pressure, moving the balance piston to overcome the remote pressure control pressure. As the balance piston moves, it empties the device discharge, for example, to a tank. In this way, the maximum torque transmitted can be remotely controlled by a remote pressure control signal. In some examples, a remote pressure controller is used in addition to a main safety valve that allows the pumping of hydraulic fluid in any case where the torque difference between the input shaft 13 and the output shaft 15 exceeds a predetermined threshold.

[0068] Figure 2 A system 110 is schematically shown having a hydraulic device 114 coupled to a torque source 112 for a starter motor function. The hydraulic device 114 may include any vane hydraulic device previously or subsequently described. Thus, according to some circumstances, the hydraulic device 114 may include a retainer (an example shown in other embodiments) configured to retain and capture a vane forming a working surface that causes hydraulic fluid to run through the coupler in a vane extension mode. In various examples, the pilot signal is used to control the retainer and / or other components of the system 110, as further discussed herein. The system 110 may optionally include two or more devices 116, such as the two hydraulic pump motors 24 described above. The two or more devices 116 may also include any type of starter motor known in the art. According to another example, the two or more devices 116 may be two or more vane hydraulic devices, each of which is configured to operate as a starter motor as further shown and described herein.

[0069] Two or more devices 116 may be coupled in series to an output shaft 118, and the output shaft 118 may be coupled to rotate with a ring 119 of the hydraulic device 114. As previously and subsequently discussed, the hydraulic device 114 may be one or more vane hydraulic devices, such as those known in the art and incorporated herein by reference or disclosed herein. For example, the hydraulic device 114 may be configured to operate as a power split coupling, a hydraulic motor, and / or a starting motor.

[0070] according to Figure 2 In the example of FIG. 1 , the system 110 includes a valve 120 to control fluid communication within the components of the system 10. Optionally, the valve 120 includes a valve 120 to control fluid communication within the components of the system 10. Figure 1One, two or more accumulators 122 of one of the accessories discussed, contemplated herein can store pressurized fluid and can be used in various operating modes, including a starting motor operating mode, an energy capture mode (e.g., capturing energy during engine braking, normal braking, or downhill), a regenerative energy application mode (e.g., a torque boost mode for driving a pile when loaded using a power branch coupler as a pump, etc.), and other modes discussed herein. The regenerative energy application mode can utilize a valve 120 to meter energy from one or more accumulators 120.

[0071] Figure 2A An exemplary schematic diagram of a control system 150 that may be used with the systems 10 and 110 disclosed herein is shown. Additional control systems and devices are also contemplated. Figure 1 and Figure 2 As in the system of FIG. 1 , system 150 shows a pump motor 24 ( Figure 1 ) or two or more devices 116 ( Figure 2 ) (e.g., two or more hydraulic pump motors). For simplicity, although Figure 2A Only a single device numbered 116' is shown, but it should be appreciated that the device 116' may be two or more devices, such as Figure 2 The device 116' may be controlled by various methods, including but not limited to electronically, pressure-compensated, levered, or digitally. The device 116' may include an output shaft 118 coupled to the gearbox 134, and the device 116 may include an inlet 152 in fluid communication with a discharge pressure 154 of the hydraulic device 114 or from one or more accumulators 122. The device 116' may be configured to receive a discharge pressure 154 from the hydraulic device 114 or a fluid 156 from one or more accumulators 122 to push the output shaft or perform other operations.

[0072] According to the various modes previously discussed, the hydraulic device 114 can be configured to operate as a coupler to allow the input shaft 117 to rotate relative to the output shaft 118. This is equivalent to the neutral state of the vehicle. If a problem occurs, the safety valve 158 allows the hydraulic device 114 to slip in a manner that the clutch may slip. In another embodiment, the safety valve 158 can be used to control the torque output amplitude of the hydraulic device 114. As a torque amplifier in the regenerative braking operating mode, the hydraulic device 114 can be engaged or disengaged. The device 116' can be stroked or operated in a pumping mode to guide the fluid generated during vehicle deceleration into the accumulator 122. If the accumulator is full, the hydraulic device 114 or the device 116' can be used to force the fluid to flow through the safety valve, or the hydraulic device 114 or the device 116' can optionally cancel the pumping. In various examples, the wheel brakes are used to assist in stopping. In some other examples, the hydraulic device 114 can be engaged to allow engine braking. According to other operating modes, the energy stored in one or more accumulators 122 (e.g., energy stored during vehicle deceleration) can be used to accelerate the vehicle or perform other operating modes, such as starting the engine. According to one example, valves 120 and 120A can be adjusted, and device 116' (configured as a pump motor) can propel the vehicle. In this mode, hydraulic device 114 can be engaged and can pump fluid until the resistance from fluid 156 reaches a magnitude to substantially lock hydraulic device 114 as a hydraulic coupler. Fluid 156 can reach such a pressure through adjustment of valves 120 and 120A. When device 116' experiences high propulsion resistance (e.g., associated with driving a pile, etc.), fluid 156 can additionally reach such a pressure. According to another example, valves 120 and 120A can be adjusted, and device 116' (configured as a starter motor) can be operated to rotate input shaft 117 while being configured not to operate output shaft 118. In this mode, the hydraulic device 114 can be engaged as a hydraulic coupler to rotate the engine. According to yet another example, the valves 120 and 120A can be adjusted and the hydraulic device 114 (configured as a starter motor) can be operated to rotate the input shaft 117 without requiring operation of the device 116'. Tandem operation of the hydraulic device 114 and the device 116' for the starter motor and other operating modes are also contemplated.

[0073] In one example, a fluid-connected internal portion of at least one of a plurality of hydraulic devices and / or a plurality of accessories may be coated with diamond or diamond-like carbon. According to other examples, the fluid-connected internal portion includes the inner surface of a roller bearing and / or a gear ring of each of the plurality of hydraulic devices. The diamond or diamond-like carbon coating may include a coating as disclosed in U.S. Pat. No. 8,691,063 B2, the entire specification of which is incorporated herein by reference. The use of a diamond or diamond-like coating may reduce or prevent corrosion of steel housings and other steel components that are in fluid communication with the hydraulic fluid. Thus, the diamond or diamond-like carbon coating may allow the use of environmentally friendly hydraulic fluids, such as ethylene glycol, which otherwise may be too corrosive.

[0074] Figure 3 An exemplary vane hydraulic device 210 configured for starter motor operation, hydraulic pumping, etc. is shown. In the remaining figures, the hydraulic device 210 includes a variable vane hydraulic device. More information on the construction and operation of vane hydraulic devices can be found, for example, in U.S. Patent Application Publication 2013 / 0067899A1 and U.S. Patents 7,955,062, 8,597,002, and 8,708,679 owned by the applicant and incorporated herein by reference.

[0075] Figure 3 A perspective view of an assembly 208 is shown, which includes a vane hydraulic device 210 and additionally a motor plate 212 and a gear plate 214. The vane hydraulic device 210 may be mounted between the motor plate 212 and the gear plate 214. Figure 3 Additionally shown is an input shaft 216 which may be part of the assembly 208. The input shaft 216 may be coupled to the vane hydraulics 210. The input shaft 216 passes through the engine plate 212.

[0076] Figure 3A and Figure 3B 208 and the vane hydraulic device 210 are shown in plan view from different sides. Figure 3A As shown, the first outer surface side 217 of the vane hydraulic device 210 may include a valve assembly 218. The valve assembly 218 may be mounted to the vane hydraulic device 210 and may be located between the motor plate 212 and the gear plate 214. The valve assembly 218 may include ports 220A and 220B. Figure 3B The second outer surface side 222 of the vane hydraulic device 210 is shown, and the second outer surface side 222 includes ports 224A, 224B, 224C and 224D. For example, ports 224A, 224B, 224C and 224D are used for exhaust and / or vane capture. Figure 4 (or actually Figures 3 to 3BWhen viewed in cross-section in FIG. 24 , the ring 226 may be one of a generally square or rectangular shape defined by its outer surface. The outer surface 225 may be partially defined by the outer surface side 218 and the second outer surface side 222.

[0077] Figure 4 and Figure 4A 2 shows a cross-sectional view of an assembly 208 including a vane hydraulic device 210. The vane hydraulic device 210 may include a ring 226, a rotor 228, and a plurality of vanes 230 ( Figure 4A ).

[0078] As used herein, the terms "radial" and "axial" refer to axes extending along the input shaft 216. As will be shown in subsequent figures, the rotor 228 may have a plurality of circumferentially spaced slots. The slots may be configured to accommodate a plurality of blades 230.

[0079] like Figure 4 As shown, the assembly 208 may include a first side plate 232 (sometimes referred to as a first end plate) and a second side plate 234 (sometimes referred to as a second end plate). Figure 4 As shown, the first side plate 232 can be coupled to a first axial side of the ring 226, and the second side plate 234 can be coupled to an opposite second side of the ring 226. The input shaft 216 can extend into and through the vane hydraulic device 210, and can extend to be adjacent to the output shaft (not shown). The rotor 228 can be selectively coupled to rotate with the input shaft 216 (or drive the input shaft 216 to rotate). The input shaft 216 can be configured to be coupled to another shaft, for example, by a spline or other mechanical connection. The ring 226 can be at least partially arranged around the rotor 228 (e.g., can be engaged with the rotor 228).

[0080] Go to Figure 4A , the rotor 228 can be arranged to rotate about an axis defined by the input shaft 216. A plurality of blades 230 can be located in the rotor 228. Each of the plurality of blades 230 can be in a retracted position and an extended position relative to the rotor 228 (see Figure 4B and Figure 4C ) between; in the extended position, the plurality of blades operate hydraulic fluid introduced adjacent to the rotor 228. As described above, the ring 226 can be at least partially arranged around the rotor 228.

[0081] In operation, the ring 226 can define a working cavity (also referred to as a chamber, and Fig. 6A and Figure 6B 20 ), the working chamber is in fluid communication with the inlet and discharge pressures (sometimes referred to as suction and pressure) of the hydraulic device 210. Figure 4AIn the example shown, the rotating assembly including the rotor 228 and the input shaft 216 may be configured to rotate about an axis within the working chamber.

[0082] Figure 4B An enlarged view of rotor 228, a portion of ring 226, and a plurality of blades 230 is shown. Figure 4B As shown, the valve assembly 218 can be in fluid communication with the pressure chamber (see Fig. 6A and Figure 6B ), and can be configured to regulate hydraulic fluid to the pressure chamber. Figure 5 A schematic perspective view of a portion of rotor 228 and several of plurality of blades 230 is shown, illustrating the internal components of rotor 228. Figure 4A and Figure 4B As shown, the plurality of blades 230 may be configured as variable position blades. Figures 4C to 5 As shown, blade 230 is shown in the retracted position and is held in that position by a retainer 236, such as a ball 236A configured to be received in a detent and retaining device 236B in blade 230. Retainer 236 can apply a clamping force to lock blade 230 in the retracted position.

[0083] Hydraulic pressure or other actuation force may be configured to move retainer 236 (particularly retainer 236B) and, accordingly, ball 236A out of engagement with blade 230. Actuator 238 (e.g., push pin coupled to the inner radial end of each blade 230) may then be used to position blade 230 as desired (including to a blade extended position where the ring engages the outer radial end). Centrifugal force, hydraulic pressure, or other mechanisms for extending blade 230 are also contemplated.

[0084] In various examples, the hydraulic fluid may include any of oil, glycol, water / glycol, or other hydraulic fluids that enter and leave the hydraulic device. In some examples, the fluid may flow into and / or out of an independent reservoir or source. For example, pressurized fluid from an accumulator may be used to operate the hydraulic device 210 as a starter motor, as described above and below. Alternatively, some examples use a larger housing that can accommodate enough fluid for operation and cooling. In some examples, ports 220A, 220B, 224A, 224B, 224C, and 224D may be used differently to engage and disengage multiple blades 230 from ring 226, and to drive, restrict (via retainer 236 or another locking mechanism), and release multiple blades 230 relative to rotor 228. An example of blade contraction or release is described in U.S. Patent Application Publication No. 2006 / 0133946, which is commonly assigned and incorporated herein by reference. The release of the plurality of stepped blades will result in the operation of the hydraulic device 210 as a coupler, a motor, and / or as a hydraulic pump, as discussed in further detail in one or more of the previously incorporated references. The flow of fluid to the various ports and chambers (in the embodiment of the present invention) may be controlled by pressure regulators, poppet valves, or other known methods. Fig. 6A and Figure 6B The control of the pressure in the hydraulic device 210 can be affected by, for example, controlling a balancing piston, as described in U.S. Patent Application Publication No. 2013 / 00067899.

[0085] The shaft 216 may be provided with torque due to the hydraulic fluid being acted upon in the blade extension mode of operation. For example, the mode of operation may be controlled by a fluid signal transmitted to the hydraulic device 210 via an inlet / port (e.g., one or more of ports 224A, 224B, 224C, and 224D or another port). For example, the input shaft 216 may be coupled to a torque source (e.g., an engine, a motor, etc.) as previously shown and described. During the starter motor mode of operation, the hydraulic fluid from, for example, an accumulator ( Figures 1 to 2A ) energy source pressurized hydraulic fluid can be used to extend the blades 230, thereby causing the torque source to be activated.

[0086] like Figures 4C to 5 As shown, the blade 230 can be configured to receive a roller 240 at its outer radial end. The roller 240 can be configured to contact the ring 226 at the blade extension position. The configuration of the roller 240 is described in, for example, U.S. Patent Application Publication No. 16 / 491,112, the entire contents of which are incorporated herein by reference.

[0087] Blade 230 may also have a different structure than that shown herein and may be configured variously as a stepped blade, such as the stepped blade of U.S. patent application publication No. 16 / 491,112, an internal blade design, or other designs known in the art and previously described in certain of my previous applications, which have been incorporated herein by reference.

[0088] Fig. 6A and Figure 6B Parts of the vane hydraulic device 210 are schematically shown. In particular, Fig. 6A and Figure 6B Ring 226 is shown isolated from other components such as rotor 228 and plurality of blades 230. For example, Fig. 6A and Figure 6B Also shown are the inner radial surface 248 of the ring 226, the first cam ring 250A and the second cam ring 250B, which may be, for example, part of the first and second thrust roller bearings. As described above, the inner radial surface 248 (along the rotor) defines a working chamber 252 for hydraulic fluid between the ring 226 and the rotor 228.

[0089] like Fig. 6A As shown, the ring 226 may include at least one suction chamber 254 and at least one pressure chamber 256. The at least one suction chamber 254 may include a first chamber or first passage of the ring 226 and may be separate from the at least one pressure chamber 256. The at least one pressure chamber 256 may include a second chamber or second passage of the ring 226. The ring 226 may also include a suction port 258 and a pressure port 260. For example, the chambers 254, 256 and the ports 258 and 260 may be as shown in FIG. Figure 4C These ports (suction port 258 and pressure port 260) allow hydraulic fluid to flow into or out of the working chamber 252 as dictated by operating criteria. As discussed above, within the working chamber 252, the hydraulic fluid may be moved by the plurality of vanes 230 ( Figures 4 to 4C )effect.

[0090] The at least one suction chamber 254 and the at least one pressure chamber 256 may be configured for hydraulic fluid to flow in and out through the ring 226. In other words, the at least one suction chamber 254 and the at least one pressure chamber 256 may be configured as channels. Fig. 6A and Figure 6B As shown, at least one suction chamber 254 and at least one pressure chamber 256 may be completely defined by the ring 226 and not communicate with each other, and not be connected by, for example, the previously described Figure 4 In contrast, at least one suction chamber 254 and at least one pressure chamber 256 may be spaced apart from the first side plate and the second side plate.

[0091] The suction port 258 and / or the pressure port 260 may be completely defined by the ring 226. The suction port 258 may be in fluid communication with at least one suction chamber 254. The suction port 258 may be configured to receive fluid from the ring 226 and the rotor 228 ( Figure 4C ) between the ring 226 and the rotor 228 (e.g., the first portion of the working chamber 252). Similarly, the pressure port 260 can be in fluid communication with the at least one pressure chamber 256. The pressure port 260 can be configured to allow hydraulic fluid to flow from the at least one pressure chamber 256 to the ring 226 and the rotor 228 ( Figure 4C ) between the second region (eg, a second portion of the working chamber 252).

[0092] like Figure 4C As shown, the suction port 258 may include at least two suction ports, and the at least two suction ports include a first suction port 258A and a second suction port 258B. The first suction port 258A may be located on a side of the inner radial surface 248 of the ring 226 that is substantially opposite to the second suction port 258B. Similarly, the pressure port 260 may include at least two pressure ports spaced apart from the two suction ports. The at least two pressure ports may include a first pressure port 260A and a second pressure port 260B. The first pressure port 260A may be located on a side of the inner radial surface 248 of the ring 226 that is substantially opposite to the second pressure port 260B.

[0093] like Fig. 6A As shown, at least one pressure chamber 256 may have an inlet 262 defined by the ring 226 leading to the at least one pressure chamber 256. The at least one pressure chamber 256 may be divided into two or more parts, the two or more parts including a first pressure part 256A that may be connected to the first pressure port 260A and a second pressure part 256B that may be connected to the second pressure port 260B. At least one suction chamber 254 may have an outlet 264 defined by the ring 226 leading to the at least one suction chamber 254. The at least one suction chamber 254 may be divided into two or more parts, the two or more parts including a first suction part 254A connected to the first suction port 258A and a second suction part 254B connected to the second suction port 258B.

[0094] like Fig. 6A and Figure 6B As shown, one of the first pressure portion 256A or the first suction portion 254A can be configured to bifurcate or branch to bypass the other of the first pressure portion 256A or the first suction portion 254A.

[0095] The configuration of the vane hydraulic device 210 can reduce the axial length of the vane hydraulic device 210 relative to previously disclosed vane hydraulic devices. Thus, for example, the entire axial length of the ring 226 can be between 75 mm and 125 mm. However, the axial length can be varied based on criteria such as shaft diameter, vehicle operating criteria (torque requirements), etc. The axial length of the vane hydraulic device 210 can be reduced by about 75 mm to about 90 mm relative to these previously disclosed vane hydraulic devices. It should be noted that the width of the ring 226 in the radial direction can remain the same as the width of the previously disclosed vane hydraulic devices.

[0096] As used herein, the terms "substantially," "about," "generally," and the like mean within + / - 10% or + / - 10 degrees of the provided value.

[0097] Despite Figure 1 6 and described in detail above, but other system designs that fall within the scope of the present invention are contemplated. For example, the systems discussed may be combined or operated in a manner slightly different from that shown.

[0098] The above detailed description includes references to the accompanying drawings that form part of the detailed description. The accompanying drawings show specific embodiments in which the present invention can be implemented by way of illustration. These embodiments are also referred to as "examples" herein. Such examples may include elements other than those shown or described. However, the inventors also contemplate examples that only provide those elements shown or described. In addition, the inventors also contemplate examples using any combination or arrangement of those elements shown or described (or one or more aspects of the elements) for a specific example (or one or more aspects of the example) or for other examples (or one or more aspects of the example) shown or described herein.

[0099] If there is an inconsistency in usage between this document and any document incorporated by reference, the usage in this document controls. In this document, as is common in patent documents, the terms "a" or "an" are used to include one or more, regardless of any other instance or usage of "at least one" or "one or more". In this document, unless otherwise stated, the term "or" is used to represent a non-exclusive or, so that "A or B" includes "A but not B", "B but not A", and "A and B". In this document, the terms "including" and "wherein" are used as plain English synonyms for the corresponding terms "comprising" and "wherein".

[0100] The above description is intended to be illustrative rather than limiting. For example, the above examples (or one or more aspects of the examples) may be used in combination with each other. For example, a person of ordinary skill in the art after reading the above description may use other embodiments. The "Abstract" is provided to enable the reader to quickly determine the nature of the technical disclosure text.

Claims

1. A hydraulic device, comprising: a rotor arranged to rotate about an axis; a plurality of vanes, each of the plurality of vanes being movable relative to the rotor between a retracted position and an extended position, the plurality of vanes in the extended position operatively engaging hydraulic fluid introduced adjacent the rotor; as well as a ring disposed around at least a portion of the rotor, the ring comprising: a suction chamber and a pressure chamber, wherein the suction chamber and the pressure chamber are configured for inflow and outflow of hydraulic fluid through the ring, wherein the suction chamber and the pressure chamber are completely defined by the ring; a suction port completely defined by the ring and in fluid communication with the suction chamber, wherein the suction port is configured to receive hydraulic fluid from a first region between the ring and the rotor; and a pressure port completely defined by the ring and in fluid communication with the pressure chamber, wherein the pressure port is configured to allow the hydraulic fluid to flow from the pressure chamber to a second area between the ring and the rotor, The hydraulic device also includes a first end plate and a second end plate, wherein the first end plate is coupled to a first axial side of the ring and the second end plate is coupled to an opposite second side of the ring, and neither the suction port nor the pressure port is disposed in the first end plate or the second end plate.

2. The hydraulic device according to claim 1, wherein: The suction chamber and the pressure chamber are spaced apart from the first end plate and the second end plate of the hydraulic device.

3. The hydraulic device of claim 2, further comprising a valve assembly mounted to the ring and located adjacent to and between the first and second end plates, wherein: The valve assembly is in fluid communication with the pressure chamber and is configured to regulate the hydraulic fluid to the pressure chamber.

4. The hydraulic device according to any one of claims 1 to 3, further comprising: a first thrust bearing disposed proximate a first axial end of the rotor; and A second thrust bearing is disposed proximate a second axial end of the rotor, the second axial end being opposite to the first axial end.

5. The hydraulic device according to any one of claims 1 to 3, wherein: The suction port includes two suction ports, the two suction ports include a first suction port and a second suction port, wherein the first suction port is approximately located on the side of the inner diameter surface of the ring opposite to the second suction port, and wherein the pressure port includes two pressure ports spaced apart from the two suction ports, the two pressure ports include a first pressure port and a second pressure port, wherein the first pressure port is approximately located on the side of the inner diameter surface of the ring opposite to the second pressure port.

6. The hydraulic device according to claim 5, wherein: The pressure chamber has a single inlet defined by the ring and leading to the pressure chamber, and the pressure chamber is divided into two parts including a first pressure part and a second pressure part, the first pressure part is connected to the first pressure port, and the second pressure part is connected to the second pressure port, and wherein the suction chamber has a single outlet defined by the ring and leading to the suction chamber, and the suction chamber is divided into two parts including a first suction part and a second suction part, the first suction part is connected to the first suction port, and the second suction part is connected to the second suction port.

7. The hydraulic device according to claim 6, wherein: One of the first pressure portion or the first suction portion is branched to bypass the other of the first pressure portion or the first suction portion.

8. The hydraulic device according to any one of claims 1 to 3, 6 to 7, further comprising a plurality of rollers, wherein: Each roller of the plurality of rollers is coupled at an outer end thereof to a corresponding one of the plurality of blades.

9. The hydraulic device according to any one of claims 1 to 3, 6 to 7, wherein: The plurality of blades are configured to have one of an internal blade clamp assembly, a push pin assembly, or a stepped blade.

10. The hydraulic device according to any one of claims 1 to 3, 6 to 7, wherein: When viewed in cross-section, the ring has one of a generally square or rectangular shape defined by its outer surface.

11. The hydraulic device according to claim 10, wherein: The ring has a plurality of ports in the outer surface and located on at least two sides of the outer surface.

12. The hydraulic device according to any one of claims 1 to 3, 6 to 7, and 11, wherein: The total axial length of the ring is between 75 mm and 125 mm.

13. A system comprising: A hydraulic device, comprising: a rotor arranged to rotate about an axis; a plurality of vanes, each of the plurality of vanes being movable relative to the rotor between a retracted position and an extended position, the plurality of vanes in the extended position operatively engaging hydraulic fluid introduced adjacent the rotor; and a ring disposed at least partially around the rotor, the ring comprising: a suction chamber and a pressure chamber, wherein the suction chamber and the pressure chamber are configured for inflow and outflow of hydraulic fluid through the ring, wherein the suction chamber and the pressure chamber are completely defined by the ring; a suction port completely defined by the ring and in fluid communication with the suction chamber, wherein the suction port is configured to receive hydraulic fluid from a first region between the ring and the rotor; and a pressure port completely defined by the ring and in fluid communication with the pressure chamber, wherein the pressure port is configured to allow the hydraulic fluid to flow from the pressure chamber to a second area between the ring and the rotor; a torque-producing device coupled to one of the ring or the rotor; and an energy storage device in fluid communication with the hydraulic device, wherein the hydraulic fluid is selectively operable to serve as a starter motor for the torque generating device using the hydraulic fluid supplied from the energy storage device, The hydraulic device also includes a first end plate and a second end plate, wherein the first end plate is coupled to a first axial side of the ring and the second end plate is coupled to an opposite second side of the ring, and neither the suction port nor the pressure port is disposed in the first end plate or the second end plate.

14. The system according to claim 13, wherein: The energy storage device includes an accumulator.

15. The system according to any one of claims 13 to 14, wherein: The suction chamber and the pressure chamber are spaced apart from the first end plate and the second end plate of the hydraulic device.

16. The system of any one of claims 13 to 14, further comprising a valve assembly in fluid communication with the pressure chamber and configured to regulate the hydraulic fluid to the pressure chamber.

17. A system according to any one of claims 13 to 14, further comprising a controller operable to control a system operating mode based on a plurality of vehicle operating parameters.

18. The system of claim 17, wherein: The system operating mode includes: operating the hydraulic device as one of a hydraulic coupler or a vane pump in addition to the starting motor, and wherein the system operating mode includes: controlling the hydraulic device and one or more accessories in one or more of an accessory operating mode, a vehicle idle / drive mode, a regenerative energy storage mode, a regenerative energy application mode, a vane pumping mode and a starting mode, and the one or more accessories may include an energy storage device.

19. The system of claim 18, wherein: The fluid communicating internal portion of the hydraulic device and the one or more accessories are coated with diamond or diamond-like carbon, and wherein the hydraulic fluid comprises ethylene glycol or water-ethylene glycol.

Images