# US 11,306,674 B2 · Systems and methods for adjusting fueling in a cylinder with a pre-chamber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,674 B2 - Document ID: US11306674B2 - Status: Granted - Kind: B2 - Application number: 17/207,475 - Filed: 2021-03-19 - Published: 2021-07-08 - Granted: 2022-04-19 - Earliest claimed: 2019-12-18 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Chris Paul Glugla - Web page: https://patentgrep.com/patent/US11306674B2 ## CPC - F02D 41/182: {for the control of a fuel injection device} - F02B 19/108: {with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber} - F02B 19/12: with positive ignition (engines with non-timed positive ignition, and with incandescent chambers F02B9/08) - F02D 37/02: one of the functions being ignition - F02D 41/0002: {Controlling intake air} - F02D 41/008: {Controlling each cylinder individually} - F02D 41/3836: {Controlling the fuel pressure} - F02D 41/40: with means for controlling injection timing or duration - F02F 1/22: characterised by having ports in cylinder wall for scavenging or charging - F02F 7/0002: {Cylinder arrangements} - F02F 11/00: Arrangements of sealings in combustion engines {(piston rings or ring sealings of similar construction F16J9/00)} - F02P 5/045: {combined with electronic control of other engine functions, e.g. fuel injection (in general F02D37/02)} - F02D 41/3094: {the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder} - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - 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) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Methods and systems are provided for operating a cylinder of an engine including a pre-chamber ignition system. In one example, a method may include determining amounts of pre-chamber gases in the cylinder prior to combustion, and adjusting an amount of fuel injected into the cylinder based on the amounts of pre-chamber gases in the cylinder. In this way, cylinder fueling may be compensated for additional air and/or fuel from the pre-chamber gases, which may increase an accuracy of the cylinder fueling and increase cylinder efficiency. ## Claims ### Claim 1 A system, comprising: an engine including a plurality of cylinders, each cylinder including a cylinder fuel injector and a pre-chamber of a pre-chamber ignition system; and a controller storing executable instructions in non-transitory memory that, when executed, cause the controller to: purge gases from the pre-chamber to the corresponding cylinder; and adjust a fuel injection amount of the cylinder fuel injector based on an amount and composition of the gases purged from the pre-chamber. ### Claim 2 (depends on 1) The system of claim 1, wherein the pre-chamber includes an air injector, a pre-chamber fuel injector, and a spark plug, and wherein the composition of the gases purged from the pre-chamber includes at least one of air, fuel, and exhaust gas from a previous combustion in the pre-chamber. ### Claim 3 (depends on 2) The system of claim 2, wherein to adjust the fuel injection amount of the cylinder fuel injector based on the amount and composition of the gases, the controller includes further instructions stored in non-transitory memory that, when executed, cause the controller to: increase the fuel injection amount of the cylinder fuel injector as a proportion of air in the gases purged from the pre-chamber increases; decrease the fuel injection amount of the cylinder fuel injector as a proportion of fuel in the gases purged from the pre-chamber increases; and decrease the fuel injection amount of the cylinder fuel injector as a proportion of exhaust gas from the previous combustion in the pre-chamber in the gases purged from the pre-chamber increases. ### Claim 4 (depends on 2) The system of claim 2, wherein to purge gases from the pre-chamber to the corresponding cylinder, the controller includes further instructions stored in non-transitory memory that, when executed, cause the controller to: actuate the air injector during a compression stroke of the cylinder at an injection pressure at or above a peak pressure of the cylinder. ### Claim 5 (depends on 4) The system of claim 4, wherein the controller includes further instructions stored in non-transitory memory that, when executed, cause the controller to: determine the peak pressure of the cylinder based on at least a temperature of the engine and engine load.