# US 11,905,810 B2 · Transmission shaft brake for engine auto restart > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,905,810 B2 - Document ID: US11905810B2 - Status: Granted - Kind: B2 - Application number: 17/453,916 - Filed: 2021-11-08 - Published: 2023-05-11 - Granted: 2024-02-20 - Earliest claimed: 2021-11-08 - Assignees: Eku Power Drives Inc. - Applicants: EKU Power Drives Inc. - Inventors: Lothar Bloschies - Web page: https://patentgrep.com/patent/US11905810B2 ## CPC - E21B 43/2607: {Surface equipment specially adapted for fracturing operations} - F02D 41/021: {Introducing corrections for particular conditions exterior to the engine (conjoint control of vehicle sub-units for propelling the vehicle B60W30/18)} - F02D 41/042: {for stopping the engine} - F02N 7/00: Starting apparatus having fluid-driven auxiliary engines or apparatus - F04B 17/05: driven by internal-combustion engines - F04B 17/06: Mobile combinations - F04B 23/02: having reservoirs - F04B 23/04: Combinations of two or more pumps - F16D 65/18: adapted for drawing members together {, e.g. for disc brakes} - F02D 41/062: {for starting (F02D41/061 takes precedence)} - F16D 2121/02: Fluid pressure - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A system and method for controlling a hydraulic fracturing pumping system is described herein. The method can include stopping an engine coupled to a hydraulic fracturing pumping system including at least one pump by supplying pressure from an accumulator to a hydraulic braking system including a brake. The method can also include starting the engine coupled to the hydraulic fracturing pumping system and releasing the brake. ## Claims ### Claim 1 A method for controlling a hydraulic fracturing pumping system, comprising: stopping an engine coupled to the hydraulic fracturing pumping system, wherein the hydraulic fracturing pumping system comprises a transmission coupled to the engine, the transmission comprising a transmission oil; pressurizing the transmission oil and introducing the pressurized transmission oil into an accumulator; supplying a pressure from the accumulator to a hydraulic braking system comprising a brake; starting the engine coupled to the hydraulic fracturing pumping system comprising at least one pump; and releasing the brake. ### Claim 2 (depends on 1) The method of claim 1, wherein the engine is a diesel engine. ### Claim 3 (depends on 1) The method of claim 1, wherein the engine is stopped by placing the engine in a standby mode. ### Claim 4 A method for controlling a hydraulic fracturing pumping system, comprising: stopping an engine coupled to the hydraulic fracturing pumping system; supplying a pressure from an accumulator to a hydraulic braking system comprising a brake, wherein the pressure from the accumulator is supplied to the hydraulic braking system upon input from a brake signal that opens a solenoid valve in fluid communication with the accumulator to allow transfer of transmission oil from the accumulator to brake under a pressure sufficient to actuate the brake; starting the engine coupled to the hydraulic fracturing pumping system comprising at least one pump; and releasing the brake. ### Claim 5 (depends on 1) The method of claim 1, wherein the brake is a disc brake that is disposed on a shaft coupled to the transmission, the engine, and the at least one pump. ### Claim 6 (depends on 4) The method of claim 4, wherein when the solenoid valve is closed the transmission oil from the accumulator is introduced to a reservoir. ### Claim 7 (depends on 6) The method of claim 6, wherein the solenoid valve is a three-way solenoid valve. ### Claim 8 A hydraulic fracturing pumping system, comprising: a first pump coupled to an engine via a transmission; a second pump coupled to the transmission, wherein the second pump is a hydraulic pump; an accumulator coupled to the hydraulic pump, the accumulator configured to store hydraulic pressure generated via the hydraulic pump; and a hydraulic brake system coupled to the accumulator. ### Claim 9 (depends on 8) The system of claim 8, wherein the engine comprises a diesel engine. ### Claim 10 (depends on 8) The system of claim 8, wherein the accumulator comprises a vessel configured to hold transmission oil under a preset pressure and to release the transmission oil under the preset pressure upon input from a signal. ### Claim 11 (depends on 8) The system of claim 8, further comprising a check valve disposed on a fluid line between the hydraulic pump and the accumulator, the check valve being configured to allow transmission oil to pass one-way therethrough, from the hydraulic pump to the accumulator. ### Claim 12 (depends on 8) The system of claim 8, wherein the accumulator is coupled to a safety block comprising: a first valve; a second valve; an overflow valve: and a two-way solenoid valve, wherein the first valve and the second valve are manually operated valves, and wherein the first valve, the second valve, the overflow valve, and the two-way solenoid valve are arranged parallel to each other. ### Claim 13 (depends on 8) The system of claim 8, further comprising a pressure sensor configured to detect a pressure of the transmission oil in the accumulator. ### Claim 14 (depends on 13) The system of claim 13, further comprising an ESC coupled to the engine and configured to receive a signal from the pressure sensor. ### Claim 15 (depends on 8) The system of claim 8, wherein the hydraulic brake system comprises a three-way solenoid valve in fluid communication with the accumulator, a transmission oil reservoir, and a brake, wherein the brake is disposed on a shaft disposed between the engine and the first pump. ### Claim 16 (depends on 8) The system of claim 8, wherein the first pump is a reciprocating plunger pump. ### Claim 17 (depends on 14) The system of claim 14, wherein the first pump, the second pump, the engine, the transmission, the accumulator, and the ESC are all disposed onto a single trailer. ### Claim 18 A hydraulic fracturing pumping system disposed on a trailer, comprising: a diesel engine; a transmission; a hydraulic pump coupled to the transmission; a transmission oil reservoir coupled to the transmission; a reciprocating plunger pump; a shaft mechanically linking the transmission to the reciprocating plunger pump; an accumulator in fluid communication hydraulic pump, the accumulator configured to store hydraulic pressure generated via the hydraulic pump; and a hydraulic brake system coupled to the accumulator.