# US 12,006,140 B2 · Electric power take-off pump control systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,140 B2 - Document ID: US12006140B2 - Status: Granted - Kind: B2 - Application number: 18/202,175 - Filed: 2023-05-25 - Published: 2023-09-21 - Granted: 2024-06-11 - Earliest claimed: 2020-09-28 - Assignees: Oshkosh Corporation - Applicants: Oshkosh Corporation - Inventors: Jeffrey Koga; Emily Davis; Jerrod Kappers; Vince Schad; Robert S. Messina; Christopher K. Yakes; Vincent Hoover; Clinton T. Weckwerth; Zachary L Klein; John Beck; Brendan Chan; Skylar A. Wachter; Nader Nasr; Chad K. Smith; Logan Gary; Derek A. Wente; Shawn Naglik; Mike J. Bolton; Jacob Wallin; Quincy Wittman; Christopher J. Rukas; Dylan Hess; Jason Rice; Zhenyi Wei; Bashar Amin; Catherine Linsmeier; Joshua D. Rocholl - Web page: https://patentgrep.com/patent/US12006140B2 ## CPC - B65F 3/02: with means for discharging refuse receptacles thereinto (conveyor construction B65G; loaders separate from vehicles B66F; fluid power control systems in general F15B) - B65F 3/06: Arrangement and disposition of fluid actuators - B60K 17/28: characterised by arrangement, location, or type of power take-off - B60K 25/00: Auxiliary drives (arrangement of tyre-inflating pumps mounted on vehicles B60C23/10) - F15B 13/026: {Pressure compensating valves} - B60K 1/04: of the electric storage means for propulsion - B60K 2001/0411: {Arrangement in the front part of the vehicle} - B60K 2025/005: {driven by electric motors forming part of the propulsion unit} - B60K 2025/026: {by a hydraulic transmission} - B60Y 2200/144: Garbage trucks, e.g. refuse trucks - B65F 2003/025: {Constructional features relating to actuating means for lifting or tipping containers} - B65F 2003/0279: {the discharging means mounted at the front of the vehicle} - F15B 11/0423: {by controlling pump output or bypass, other than to maintain constant speed} - F15B 21/087: {Control strategy, e.g. with block diagram} - F15B 2211/20515: Electric motor - F15B 2211/20553: with pilot circuit, e.g. for controlling a swash plate - F15B 2211/6309: the pressure being a pressure source supply pressure - F15B 2211/6323: the flow rate being a pressure source flow rate - F15B 2211/6333: representing a state of the pressure source, e.g. swash plate angle - F15B 2211/6651: Control of the prime mover, e.g. control of the output torque or rotational speed - F15B 2211/6652: Control of the pressure source, e.g. control of the swash plate angle - F15B 2211/6653: Pressure control - F15B 2211/6655: Power control, e.g. combined pressure and flow rate control - F15B 2211/85: Control during special operating conditions - F15B 2211/86: Control during or prevention of abnormal conditions - F15B 2211/865: Prevention of failures - B65F: GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE (disinfecting refuse A61L; refuse disintegrators B02C; sorting refuse B03B; B07B; handcarts for transporting refuse receptacles B62B; sack holders B65B67/00; converting refuse into fertilisers C05F; converting refuse into solid fuels C10L; sewers, cesspools E03F; arrangements in buildings for the disposal of refuse E04F17/10; refuse-consuming furnaces F23G; {for surgical articles A61B50/36}) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A refuse vehicle includes a chassis, an energy storage device, a vehicle body, an electric power take-off system, and a hydraulic component. The energy storage device is supported by the chassis and is configured to provide electrical power to a prime mover. Activation of the prime mover selectively drives the refuse vehicle. The vehicle body is supported by the chassis, and includes an on-board receptacle for storing refuse therein. The electric power take-off system is positioned on the vehicle body, and includes an electric motor configured to drive a hydraulic pump to convert electrical power received from the energy storage device into hydraulic power. An amount of electrical power at least one of received by and provided to the electric motor is limited by a controller to control an output characteristic of the hydraulic pump. The hydraulic component is in fluid communication with the hydraulic pump and configured to operate using hydraulic power from the electric power take-off system. ## Claims ### Claim 1 A refuse vehicle comprising: a chassis; an energy storage device supported by the chassis and configured to provide electrical power to a prime mover, wherein activation of the prime mover selectively drives the refuse vehicle; a vehicle body supported by the chassis, the vehicle body including an on-board receptacle for storing refuse therein; an electric power take-off system positioned on the vehicle body, the electric power take-off system including an electric motor configured to drive a hydraulic pump to convert electrical power received from the energy storage device into hydraulic power, wherein an output characteristic of the hydraulic pump is limited by a controller to control an amount of torque produced by the electric motor; and a hydraulic component in fluid communication with the hydraulic pump and configured to operate using hydraulic power from the electric power take-off system, wherein the controller controls the amount of torque produced by the electric motor by activating a control valve to introduce pressurized hydraulic fluid to the hydraulic pump to reduce a hydraulic flow rate of the hydraulic pump. ### Claim 2 (depends on 1) The refuse vehicle of claim 1, wherein the hydraulic pump is a swashplate-style variable displacement pump. ### Claim 3 (depends on 1) The refuse vehicle of claim 1, wherein the controller controls the amount of torque produced by the electric motor such that the product of a hydraulic fluid pressure and the hydraulic flow rate downstream of the hydraulic pump is less than or equal to a threshold torque value. ### Claim 4 (depends on 3) The refuse vehicle of claim 3, further comprising a compactor positioned within the on-board receptacle, wherein the compactor is movable within the on-board receptacle using hydraulic power from the electric power take-off system. ### Claim 5 (depends on 1) The refuse vehicle of claim 1, wherein the control valve is a solenoid valve. ### Claim 6 (depends on 5) The refuse vehicle of claim 5, wherein activating the solenoid valve selectively opens a flow path to introduce pressurized hydraulic fluid toward a moveable control surface of the hydraulic pump to adjust an angle of the moveable control surface to reduce the hydraulic flow rate of the hydraulic pump. ### Claim 7 (depends on 6) The refuse vehicle of claim 6, wherein adjusting the angle of the moveable control surface using pressurized fluid adjusts a discharge pressure of the hydraulic pump, wherein adjusting the discharge pressure of the hydraulic pump reduces an amount of electrical power needed to drive the hydraulic pump. ### Claim 8 (depends on 6) The refuse vehicle of claim 6, wherein the solenoid valve is biased toward a flow blocking position, wherein a flow path between an outlet of the hydraulic pump and the moveable control surface is obstructed by the solenoid valve in the flow blocking position. ### Claim 9 (depends on 6) The refuse vehicle of claim 6, wherein the controller limits a rate of electrical power drawn from the energy storage device by reducing the amount of torque experienced by the hydraulic pump. ### Claim 10 (depends on 6) The refuse vehicle of claim 6, wherein the controller monitors a position of the moveable control surface using a sensor, wherein the controller is configured to calculate a hydraulic fluid flow rate from the hydraulic pump based upon the monitored position of the moveable control surface, and wherein the controller is configured to activate the solenoid valve in response to determining that the hydraulic fluid flow rate exceeds a threshold flow rate. ### Claim 11 (depends on 10) The refuse vehicle of claim 10, wherein the controller monitors a fluid pressure downstream of an outlet of the hydraulic pump using a pressure sensor, and wherein the controller is configured to activate the solenoid valve in response to receiving an indication that a product of the hydraulic fluid flow rate and the fluid pressure exceeds a threshold torque value. ### Claim 12 (depends on 11) The refuse vehicle of claim 11, wherein the controller is programmed with a pump torque curve, and wherein the controller is configured to adjust the position of the moveable control surface to adjust the hydraulic fluid flow rate of the hydraulic pump to remain below the pump torque curve. ### Claim 13 (depends on 1) The refuse vehicle of claim 1, further comprising a disconnect positioned between the energy storage device and the electric power take-off system, wherein the disconnect is configured to selectively decouple the electric power take-off system from the energy storage device to disable the hydraulic pump. ### Claim 14 A refuse vehicle comprising: a chassis; an energy storage device supported by the chassis and configured to provide electrical power to a prime mover, wherein activation of the prime mover selectively drives the refuse vehicle; a vehicle body supported by the chassis, the vehicle body including an on-board receptacle for storing refuse therein; an electric power take-off system positioned on the vehicle body, the electric power take-off system including an electric motor configured to drive a hydraulic pump to convert electrical power received from the energy storage device into hydraulic power, wherein an output characteristic of the hydraulic pump is limited by a controller to control an amount of electrical power provided to the electric motor by the energy storage device; a hydraulic component in fluid communication with the hydraulic pump and configured to operate using hydraulic power from the electric power take-off system, wherein the controller controls the output characteristic of the hydraulic pump by activating a control valve to selectively open a flow path to introduce pressurized hydraulic fluid toward the hydraulic pump to adjust a position of a moveable control surface of the hydraulic pump. ### Claim 15 (depends on 14) The refuse vehicle of claim 14, wherein the control valve is a solenoid valve. ### Claim 16 (depends on 15) The refuse vehicle of claim 15, wherein the hydraulic pump is a swashplate-style variable displacement pump, and wherein adjusting an angle of the swashplate using pressurized fluid adjusts a flow rate of the hydraulic pump, wherein adjusting the flow rate of the hydraulic pump reduces the amount of electrical power needed to drive the hydraulic pump. ### Claim 17 (depends on 16) The refuse vehicle of claim 16, wherein the controller monitors a position of the swashplate using a sensor, wherein the controller is configured to calculate a hydraulic fluid flow rate from the hydraulic pump based upon the monitored position of the swashplate, and wherein the controller is configured to activate the solenoid valve in response to determining that the flow rate exceeds a threshold flow rate. ### Claim 18 (depends on 17) The refuse vehicle of claim 17, wherein the controller monitors a fluid pressure downstream of an outlet of the hydraulic pump using a pressure sensor, and wherein the controller is configured to activate the solenoid valve in response to receiving an indication that a product of the hydraulic fluid flow rate and the fluid pressure exceed a threshold torque value. ### Claim 19 (depends on 14) The refuse vehicle of claim 14, further comprising a high-pressure hydraulic line, a control line, and a low-pressure hydraulic line, wherein the hydraulic component is fluidly coupled to the high-pressure hydraulic line, wherein the hydraulic pump is fluidly coupled to the control line, and wherein the control valve selectively controls flow between high-pressure hydraulic line and the control line to selectively provide the pressurized hydraulic fluid toward the hydraulic pump. ### Claim 20 A refuse vehicle comprising: a chassis; an energy storage device supported by the chassis comprising a total electrical power, and configured to provide a first electrical power to a prime mover, wherein activation of the prime mover selectively drives the refuse vehicle; a vehicle body supported by the chassis, the vehicle body including an on-board receptacle for storing refuse therein; an electric power take-off system positioned on the vehicle body, the electric power take-off system including an electric motor configured to drive a hydraulic pump to convert a second electrical power received from the energy storage device into hydraulic power; a controller configured to monitor a hydraulic fluid flow rate and a hydraulic fluid pressure downstream of the hydraulic pump and adjust an output of the hydraulic pump by selectively introducing pressurized hydraulic fluid toward the hydraulic pump upon detecting that a product of the hydraulic fluid flow rate and the hydraulic fluid pressure exceed a threshold torque value; and a lifting system movable relative to the on-board receptacle using hydraulic power from the electric power take-off system, wherein the controller is further configured to control the second electrical power received by the energy storage device such that the sum of first electrical power and the second electrical power is less than or equal to the total electrical power.