# US 10,119,506 B2 · Method and apparatus for modifying an OEM fuel system for bi-fuel use > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,506 B2 - Document ID: US10119506B2 - Status: Granted - Kind: B2 - Application number: 15/330,975 - Filed: 2015-04-02 - Published: 2018-06-07 - Granted: 2018-11-06 - Earliest claimed: 2014-04-02 - Assignees: Optimus Technologies, Inc. - Applicants: Optimus Technologies, LLC - Inventors: Colin N. Huwyler; Jonathan Ewing; Aaron Sieczkarek - Web page: https://patentgrep.com/patent/US10119506B2 ## CPC - F02M 37/0064: {for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition (controlling engines working with pluralities of fuels F02D19/06)} - F02D 19/00: Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures (the non-fuel substances being gaseous F02D21/00) - F02D 19/066: {Retrofit of secondary fuel supply systems; Conversion of engines to operate on multiple fuels} - F02M 37/44: Filters structurally associated with pumps - F02M 37/48: Filters structurally associated with fuel valves - F02M 43/00: Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive - F02M 43/02: Pumps peculiar thereto - F02D 19/0673: {Valves; Pressure or flow regulators; Mixers} - F02D 19/0697: {Arrangement of fuel supply systems on engines or vehicle bodies; Components of the fuel supply system being combined with another device} - F02M 37/26: with water detection means - F02M 37/30: characterised by heating means - Y02T 10/30: Use of alternative fuels, e.g. biofuels - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present invention is a system and method for adapting and modifying an existing mono-fuel delivery system for an internal combustion engine to run as a bi-fuel system by reusing and repurposing OEM components of the mono-fuel system. The bi-fuel system makes use of an integration plate that may be mounted to the system fuel filter in substantially the same location as the fuel filter is mounted in the mono-fuel configuration. The integration plate also may deliver either fuel types into the existing engine fuel intake port thus the system does not require the creation of a secondary fuel intake port for the secondary fuel. The integration plate may also be situated such that it minimizes the space it must use within the engine compartment and it may use the preexisting engine mounting points designed for the fuel filter in the mono-fuel system. ## Claims ### Claim 1 A fuel delivery system for an internal combustion engine where a plurality of fuels are delivered to the engine comprising: a fuel filter, a fuel selector valve coupled to the fuel filter, a fuel lift pump coupled to the fuel selector valve; and a fuel integration plate coupled to the fuel lift pump wherein the fuel integration plate is adapted to accept a plurality of fuels from the fuel selector valve and transmit the plurality of fuels into one or more engine fuel inlet ports wherein each engine fuel inlet port is a singular entry point for fuel into an engine and the engine fuel inlet port is originally designed for use with a single fuel source. ### Claim 2 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, wherein the fuel filter is mounted to the fuel integration plate such that the fuel filter is located in substantially the same position as in the fuel filter's original position in a single fuel delivery system. ### Claim 3 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, wherein the integration plate contains a pressure relief valve that is coupled to the fuel selector valve. ### Claim 4 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, where the fuel filter is adapted to run entirely under vacuum pressure created by the fuel lift pump. ### Claim 5 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, wherein the fuel integration plate blocks a fuel filter outlet port wherein the fuel filter outlet port is designed to couple to the engine fuel inlet port in a single fuel system. ### Claim 6 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, wherein the integration plate has at least one mounting point, wherein at least one mounting point couples with an engine mounting point, wherein the engine mounting point is adapted to couple with a fuel filter in a single fuel system. ### Claim 7 A method of adapting a fuel system of an internal combustion engine that uses a single fuel source to utilize multiple fuel sources comprising the steps of: reusing an existing fuel system's fuel filter, fuel lines, fuel lift pump and engine fuel inlet port, repurposing an existing systems fuel filter such that the fuel in the fuel filter does not directly flow into the engine fuel inlet port, positioning a fuel selector valve to minimize cross contamination of different fuels wherein the fuel selector valve is coupled between the fuel filter and the engine fuel inlet port, and modifying a fuel integration plate such that the fuel integration plate is coupled to the fuel selector valve and the fuel filter is mounted to the fuel integration plate such that the fuel filter is located in substantially the same position as in the fuel filter's original position in a single fuel delivery system. ### Claim 8 (depends on 7) A method of adapting a fuel system of claim 7, wherein the fuel filter is repurposed by adapting the fuel filter to run entirely under vacuum pressure created by the fuel lift pump. ### Claim 9 (depends on 7) A method of adapting a fuel system of claim 7, wherein the fuel integration is adapted to block a fuel filter outlet port wherein the fuel filter outlet port is designed to couple to the engine fuel inlet port in a single fuel system. ### Claim 10 (depends on 7) A method of adapting a fuel system of claim 7, wherein the fuel system utilizes the engine fuel inlet port such that the engine fuel inlet port is the singular entry point for fuel into an engine. ### Claim 11 (depends on 7) A method of adapting a fuel system of claim 7, wherein the integration plate is adapted to contain a pressure relief valve that is coupled to the fuel selector valve. ### Claim 12 (depends on 7) A method of adapting a fuel system of claim 7, wherein the integration plate is adapted to have at least one mounting point, wherein at least one mounting point couples with an engine mounting point, wherein the engine mounting point is adapted to couple with a fuel filter in a single fuel system. ### Claim 13 A fuel integration plate adapted for use in a multi-fuel delivery system for an internal combustion engine comprising: a fuel exit port disposed on an engine facing side of the fuel integration plate, wherein the fuel exit port is adapted to couple with an engine fuel inlet port, a shared fuel inlet port disposed on the fuel integration plate, where a plurality of fuels flow into the fuel integration plate and flow out of the fuel exit port, and at least one mounting point disposed on the fuel integration plate, wherein at least one mounting point couples with an engine mounting point, wherein the engine mounting point is adapted to couple with a fuel filter in a single fuel system. ### Claim 14 (depends on 13) A fuel integration plate of claim 13, wherein the fuel integration plate is adapted to couple with the fuel filter such that the fuel filter is located in substantially the same position as in the fuel filter's original position in a single fuel delivery system and the fuel filter mounts to at least one mounting point that is coupled with at least one engine mounting point. ### Claim 15 (depends on 13) A fuel integration plate of claim 13 wherein the fuel integration plate blocks a fuel filter outlet port wherein the fuel filter outlet port is designed to couple to the engine fuel inlet port in a single fuel system. ### Claim 16 (depends on 13) A fuel integration plate of claim 13, wherein the integration plate contains a pressure relief valve. ### Claim 17 (depends on 13) A fuel integration plate of claim 13, wherein the engine fuel inlet port is a singular entry point for fuel into an engine and the engine fuel inlet port is originally designed for use with a single fuel source. ### Claim 18 (depends on 13) A fuel integration plate of claim 13, wherein the fuel exit port is a threaded coupling that couples with the engine fuel inlet port. ### Claim 19 (depends on 1) A fuel delivery system for an internal combustion engine of claim 1, wherein the fuel selector valve individually selects one fuel source to be delivered to the engine fuel intake port. ### Claim 20 (depends on 7) A method of adapting a fuel system of claim 7, wherein the fuel selector valve individually selects one fuel source to be delivered to the engine fuel intake port.