# US 12,760,701 B2 · Fuel injector testing machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,701 B2 - Document ID: US12760701B2 - Status: Granted - Kind: B2 - Application number: 18/352,441 - Filed: 2023-07-14 - Published: 2023-11-09 - Granted: 2026-10-13 - Earliest claimed: 2020-09-03 - Applicants: Paul Arseneau - Inventors: Paul Arseneau - Web page: https://patentgrep.com/patent/US12760701B2 ## CPC - F02M 65/00: Testing fuel-injection apparatus, e.g. testing injection timing {(testing of ignition F02P17/00; measuring fuel consumption G01F9/00); Cleaning of fuel-injection apparatus} - F02M 65/001: {Measuring fuel delivery of a fuel injector} - G01K 13/00: Thermometers specially adapted for specific purposes - F02M 2200/85: Mounting of fuel injection apparatus - F02M 2200/853: involving use of quick-acting mechanism, e.g. clips - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00) ## Abstract A fuel injector testing machine is provided. The machine includes a head unit having a flow meter, and a fuel injector holding assembly. The head unit and/or the fuel injector holding assembly can be moved relative to each other, allowing the head unit to test a subset of fuel injectors held on the fuel injector holding assembly, and subsequently can test another subset of the fuel injectors via movement of the head unit and/or fuel injector holding assembly. ## Claims ### Claim 1 A fuel injector testing machine comprising: a head unit comprising a fluid inlet; and a fuel injector holding assembly connected to the head unit; wherein the fuel injector holding assembly is operable to hold a plurality of fuel injectors; wherein, the fuel injector holding assembly and the head unit are configured to move with respect to each other, between at least a first position and a second position; wherein the head unit is configured to engage with and test a first subset in the plurality of fuel injectors at the first position, and a second subset in the plurality of fuel injectors at the second position. ### Claim 2 (depends on 1) The fuel injector testing machine of claim 1, wherein the first subset of fuel injectors is different from the second subset of fuel injectors. ### Claim 3 (depends on 1) The fuel injector testing machine of claim 1, wherein the fuel injector holding assembly is in a shape of a carousel. ### Claim 4 (depends on 1) The fuel injector testing machine of claim 1, wherein the head unit is configured to engage with and test a smaller number of fuel injectors than a count of the plurality of fuel injectors held by the fuel injector holding assembly. ### Claim 5 (depends on 1) The fuel injector testing machine of claim 1 further comprising a fitting in communication with the fluid inlet. ### Claim 6 (depends on 5) The fuel injector testing machine of claim 5 wherein the fitting forms a fluid outlet from the head unit. ### Claim 7 (depends on 6) The fuel injector testing machine of claim 6 further comprising a flow meter in communication with the fluid outlet. ### Claim 8 (depends on 7) The fuel injector testing machine of claim 7 wherein the flow meter is operable to measure a fluid flow through the fitting. ### Claim 9 A fuel injector testing machine comprising: a head unit comprising a fluid inlet; and a fuel injector holding assembly connected to the head unit; wherein the fuel injector assembly is operable to hold a plurality of fuel injectors; wherein, the fuel injector holding assembly and the head unit are configured to move with respect to each other, between at least a first position and a second position; wherein the head unit is configured to engage with and test a first subset in the plurality of fuel injectors at the first position, and a second subset in the plurality of fuel injectors at the second position. ### Claim 10 (depends on 9) The fuel injector testing machine of claim 9 further comprising a computerized controller in communication with a solenoid valve of a first fuel injector in the plurality of fuel injectors and with a solenoid valve of a second fuel injector in the plurality of fuel injectors. ### Claim 11 (depends on 9) The fuel injector testing machine of claim 9 wherein at least one of the head unit and fuel injector holding assembly are movable in a reciprocating motion towards and away from the other of the fuel injector holding assembly and head unit to allow a plurality of fittings to engage and disengage with the plurality of fuel injectors held on the fuel injector holding assembly. ### Claim 12 (depends on 9) The fuel injector testing machine of claim 9 wherein the fuel injector holding assembly is one of a carousel, a conveyor, or a rack. ### Claim 13 (depends on 9) The fuel injector testing machine of claim 9 further comprising a fluid reservoir in communication with the fluid inlet. ### Claim 14 (depends on 9) The fuel injector testing machine of claim 9, wherein the first subset of fuel injectors is different from the second subset of fuel injectors. ### Claim 15 (depends on 9) The fuel injector testing machine of claim 9, wherein the head unit is configured to engage with and test a smaller number of fuel injectors than a count of the plurality of fuel injectors held by the fuel injector holding assembly. ### Claim 16 (depends on 9) The fuel injector testing machine of claim 9 further comprising a manifold. ### Claim 17 (depends on 16) The fuel injector testing machine of claim 16 further comprising a plurality of fittings in communication with the manifold. ### Claim 18 (depends on 17) The fuel injector testing machine of claim 17 wherein each of the plurality of fittings forms a fluid outlet from the head unit. ### Claim 19 (depends on 18) The fuel injector testing machine of claim 18 further comprising a flow meter in communication with the fluid outlet. ### Claim 20 (depends on 19) The fuel injector testing machine of claim 19 wherein the flow meter is operable to measure a fluid flow through at least one of the plurality of fittings.