# US 10,309,347 B2 · Evaporative emissions control canister purge system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,347 B2 - Document ID: US10309347B2 - Status: Granted - Kind: B2 - Application number: 15/485,953 - Filed: 2017-04-12 - Published: 2018-10-18 - Granted: 2019-06-04 - Earliest claimed: 2017-04-12 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: William L. Villaire; Manoj R. Chaudhari; Edward J. Strzelecki; Philip A. Yaccarino - Web page: https://patentgrep.com/patent/US10309347B2 ## CPC - F02M 25/089: {Layout of the fuel vapour installation} - B60K 15/03: Fuel tanks - B60K 15/03504: {adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems} - F02M 25/0872: {Details of the fuel vapour pipes or conduits} - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - 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 ## Abstract An evaporative emissions control system includes an evaporative emissions control canister, a first fuel vapor return conduit including a first end fluidically connected the evaporative emissions control canister and a second end connectable to an internal combustion (IC) engine. A first valve is fluidically connected to the first fuel vapor return conduit. A second fuel vapor return conduit includes a first end portion fluidically connected to the first fuel vapor return conduit and a second end portion configured to be arranged in a vehicle fuel tank. A second valve is fluidically connected to the second fuel vapor return conduit at the second end portion in the vehicle fuel tank. A vapor return system includes a pump fluidically connected to the second valve in the vehicle fuel tank. ## Claims ### Claim 1 An evaporative emissions control system comprising: an evaporative emissions control canister; a first fuel vapor return conduit including a first end fluidically connected to the evaporative emissions control canister and a second end connectable to an internal combustion (IC) engine; a first valve fluidically connected to the first fuel vapor return conduit; a second fuel vapor return conduit including a first end portion fluidically connected to the first fuel vapor return conduit and a second end portion configured to be arranged in a vehicle fuel tank; a second valve fluidically connected to the second fuel vapor return conduit at the second end portion in the vehicle fuel tank; a vapor return system including a pump fluidically connected to the second valve in the vehicle fuel tank; and a vapor inlet conduit extending from the vehicle fuel tank to the evaporative emissions control canister, the vapor inlet conduit including an outlet valve. ### Claim 2 (depends on 1) The evaporative emissions control system according to claim 1, wherein the pump comprises an eductor pump. ### Claim 3 (depends on 2) The evaporative emissions control system according to claim 2, wherein the eductor pump includes a fuel inlet and a fuel outlet fluidically exposed to the vehicle fuel tank. ### Claim 4 (depends on 3) The evaporative emissions control system according to claim 3, wherein the vapor return system includes a vapor reservoir fluidically connected to the second fuel vapor return conduit, the fuel outlet of the eductor pump being arranged in the vapor reservoir. ### Claim 5 (depends on 4) The evaporative emissions control system according to claim 4, wherein the vapor return system includes a diffuser fluidically connected to the vapor reservoir, the diffuser being arranged downstream of the fuel outlet of the eductor pump. ### Claim 6 (depends on 1) The evaporative emissions control system according to claim 1, wherein the second fuel vapor return conduit is fluidically connected to the first fuel vapor return conduit between the evaporative emissions control canister and the first valve. ### Claim 7 A motor vehicle comprising: an internal combustion (IC) engine; a vehicle fuel tank fluidically connected to the IC engine; and an evaporative emissions control system fluidically connected to the IC engine and the vehicle fuel tank, the evaporative emissions control system comprising: an evaporative emissions control canister; a first fuel vapor return conduit including a first end fluidically connected to the evaporative emissions control canister and a second end fluidically connected to the internal combustion (IC) engine; a first valve fluidically connected to the first fuel vapor return conduit; a second fuel vapor return conduit including a first end portion fluidically connected to the first fuel vapor return conduit and a second end portion arranged in the vehicle fuel tank; a second valve fluidically connected to the second fuel vapor return conduit at the second end portion in the vehicle fuel tank; a vapor return system including a pump fluidically connected to the second valve in the vehicle fuel tank; and a vapor inlet conduit extending from the vehicle fuel tank to the evaporative emissions control canister, the vapor inlet conduit including an outlet valve. ### Claim 8 (depends on 7) The motor vehicle according to claim 7, wherein the pump comprises an eductor pump. ### Claim 9 (depends on 8) The motor vehicle according to claim 8, wherein the eductor pump includes a fuel inlet and a fuel outlet, the fuel outlet being fluidically exposed to the vehicle fuel tank. ### Claim 10 (depends on 9) The motor vehicle according to claim 9, wherein the vapor return system includes a vapor reservoir fluidically connected to the second fuel vapor return conduit, the fuel outlet of the eductor pump being arranged in the vapor reservoir. ### Claim 11 (depends on 10) The motor vehicle according to claim 10, wherein the vapor return system includes a diffuser fluidically connected to the vapor reservoir, the diffuser being arranged downstream of the fuel outlet. ### Claim 12 (depends on 7) The motor vehicle according to claim 7, wherein the second fuel vapor return conduit is fluidically connected to the first fuel vapor return conduit between the evaporative emissions control canister and the first valve. ### Claim 13 (depends on 7) The motor vehicle according to claim 7, wherein the vehicle fuel tank includes a vapor dome. ### Claim 14 (depends on 13) The motor vehicle according to claim 13, wherein the vapor return system is arranged in the vapor dome. ### Claim 15 (depends on 7) The motor vehicle according to claim 7, wherein the vapor return system is arranged in a bottom portion of the vehicle fuel tank.