US 2013 O152904A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2013/0152904 A1 Balsdon et al. (43) Pub. Date: Jun. 20, 2013

(54) TURBO PURGE MODULE FOR (52) U.S. Cl. TURBOCHARGED VEHICLE CPC ...... F02M 27/00 (2013.01) USPC ...... 123/S18 (71) Applicant: Continental Automotive Systems, Inc., Auburn Hills, MI (US) (72) Inventors: David William Balsdon, Chatham (CA); (57) ABSTRACT Brian Gordon Woods, Chatham (CA) (73) Assignee: Continental Automotive Systems, Inc., A turbo purge module includes a purge valve connected Auburn Hills, MI (US) between a vapor collection canister and an intake manifold. A Venturi nozzle receives pressurized air from the turbocharger, (21) Appl. No.: 13/691,884 when the turbocharger is operating, to create a vacuum to draw vapors from the canister through the purge valve to an (22) Filed: Dec. 3, 2012 inlet of the turbocharger and the intake manifold to be purged in the engine. A first check valve prevents pressure from the Related U.S. Application Data intake manifold from reaching the canister when the turbo (60) Provisional application No. 61/577,445, filed on Dec. charger is operating. A second check valve prevents vacuum 19, 2011. pressure from the intake manifold from communicating with s the venturinozzle when the turbocharger is at idle, with vapor Publication Classification from the canister being drawn through the purge valve and the intake manifold to be purged in the engine. The purge valve, (51) Int. Cl. Venturi nozzle, first check valve, and second check valve are F02M 27/00 (2006.01) integrated into a single component.

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Patent Application Publication Jun. 20, 2013 Sheet 1 of 2 US 2013/0152904 A1

12 20 22

CARBON CANISTER

FIG. 1 PRIORART

12 2O 22

INTAKE MANFOLD

C

CARBON CANISTER

FIG.2 PRIORART Patent Application Publication Jun. 20, 2013 Sheet 2 of 2 US 2013/0152904 A1

CARBON CANISTER

26

US 2013/0152904 A1 Jun. 20, 2013

TURBO PURGE MODULE FOR from the canister being drawn through the purge valve and the TURBOCHARGED VEHICLE intake manifold to be purged in the engine. 0008. In accordance with another aspect of an embodi 0001. This application claims the benefit of U.S. Provi ment, a turbo purge module for an emission management sional Application No. 61/577,445, filed on Dec. 19, 2011. system of a turbocharged vehicle is provided. The vehicle includes a vapor collection canister constructed and arranged FIELD to be connected with a fuel tank to receive hydrocarbon 0002 This invention relates to vapor management systems vapors from the fuel tank; an intake manifold for drawing air of vehicles and, more particularly, to dual operation turbo into an internal combustion engine of the vehicle; and a purge module that creates a vacuum when a turbocharger is turbocharger connected with the intake manifold to provide used and uses manifold vacuum when the turbocharger is not pressurized air to the engine. The module includes a purge used. valve having an inlet constructed and arranged to be con nected to the vapor collection canister, and an outlet con BACKGROUND structed and arranged to be connected to the intake manifold; a venturi nozzle constructed and arranged to receive pressur 0003. With reference to FIG. 1, a conventional evaporative ized air from the turbocharger, when the turbocharger is oper vapor management system for a turbocharged vehicle is ating, to create a vacuum to draw vapors from the canister shown, generally indicated at 10. When the turbocharger 12 is through the purge valve to an inlet of the turbocharger and the operating, high pressure air (arrow A) from the turbocharger intake manifold to be purged in the engine; a first check valve 12 is directed through a venturi noZZle 14 to induce a vacuum to prevent pressure from the intake manifold from reaching (arrows B) that draws hydrocarbons from canister 18 through the canister when the turbocharger is operating; and a second the electronically operated purge valve 18, to the inlet of the check valve to prevent vacuum pressure from the intake mani turbocharger 12, through the throttle 20 and intake manifold fold from communicating with the venturi nozzle when the 22, for purging at the engine (not shown). The canister 18 and turbocharger is at idle, with vapor from the canister being fuel tank (not shown) connected therewith is protected from drawn through the purge valve and the intake manifold to be manifold pressure by use of a check valve 22. purged in the engine. The purge valve, Venturi nozzle, first 0004. With reference to FIG. 2, when the turbocharger 12 check valve, and second check valve are integrated into a is idle, manifold vacuum (arrows C) provides conventional single component. purging through the engine. A check valve 24 prevents the 0009. Other objects, features and characteristics of the vacuum from reaching the Venturi nozzle 14. present invention, as well as the methods of operation and the 0005. The system 10 includes many separate components functions of the related elements of the structure, the combi that are interconnected by various low permeability, flexible nation of parts and economics of manufacture will become hoses requiring hose mounting clips. The individual compo more apparent upon consideration of the following detailed nent connections with hoses can be pressure or vacuum leak description and appended claims with reference to the accom age points. Also, the flow in the system 10 is not consistent panying drawings, all of which form a part of this specifica from application to application. tion. 0006 Thus, there is a need to integrate components of the system 10 to reduce packaging size, to reduce the number of BRIEF DESCRIPTION OF THE DRAWINGS hose connections, to reduce cost, and to reduce flow variabil 1ty. 0010. The invention will be better understood from the following detailed description of the preferred embodiments SUMMARY thereof, taken in conjunction with the accompanying draw ings, in which: 0007. An object of the invention is to fulfill the need 0011 FIG. 1 is a schematic view of a conventional evapo referred to above. In accordance with the principles of an rative vapor management system for a turbocharged vehicle, embodiment, this objective is achieved by an evaporative shown purging hydrocarbons when the turbocharger is oper emission management system for a vehicle. The system ating. includes a vapor collection canister constructed and arranged 0012 FIG. 2 is a schematic view of the conventional to be connected with a fuel tank to receive hydrocarbon evaporative vapor management system of FIG. 1, shown vapors from the fuel tank; an intake manifold for drawing air purging hydrocarbons when the turbocharger is idle. into an internal combustion engine of the vehicle; a turbo 0013 FIG. 3 is a schematic view of an evaporative vapor charger connected with the intake manifold to provide pres management system, showing in schematic view, a turbo Surized air to the engine; and a single, integral turbo purge purge module provided in accordance with an embodiment. module. The module includes a purge valve having an inlet 0014 FIG. 4 is a side view of a turbo purge module of an connected to the canister and an outlet connected to the intake embodiment. manifold; a venturi nozzle constructed and arranged to receive pressurized air from the turbocharger, when the tur DETAILED DESCRIPTION OF AN EXEMPLARY bocharger is operating, to create a vacuum to draw vapors EMBODIMENT from the canister through the purge valve to an inlet of the turbocharger and the intake manifold to be purged in the 0015 Referring to FIG. 1, a schematic view of an evapo engine; a first check valve to prevent pressure from the intake rative vapor management system is shown, generally indi manifold from reaching the canister when the turbocharger is cated at 10' having a turbo purge module, generally indicated operating; and a second check valve to prevent vacuum pres at 26, in accordance with an embodiment. The turbo purge Sure from the intake manifold from communicating with the module 26, as shown in FIG. 4, integrates the venturi nozzle venturi nozzle when the turbocharger is at idle, with vapor 14, the check valves 22 and 24' and the purge valve 18' into US 2013/0152904 A1 Jun. 20, 2013 a single component. Thus, the purge valve 18' is coupled a second check valve to prevent vacuum pressure from directly (absent any flexible hoses) with the check valves 22 the intake manifold from communicating with the and 24', with the venturinozzle being coupled directly (absent venturi nozzle when the turbocharger is at idle, with any flexible hose) with the check valve 24'. The canister 16 is vapor from the canister being drawn through the constructed and arranged to be connected with a fuel tank to purge valve and the intake manifold to be purged in receive hydrocarbon vapors therefrom in the conventional the engine. a. 2. The system of claim 1, wherein the purge valve is 0016. When the conventional turbocharger 12 is operat coupled directly with the each of the first and second check ing, high pressure air from the outlet 13 of the turbocharger 12 valves and the venturi nozzle is coupled directly with the is directed through hose 15 to the inlet 27 of the venturinozzle second check valve, without the use of flexible hoses. 14 to induce a vacuum that draws hydrocarbon vapors from 3. The system of claim 1, wherein an axis of the inlet of the canister 18' through hose 17, through the electronically oper purge valve, an axis of the outlet of the purge valve, and an ated purge valve 18, through the outlet 29 of the venturi axis of the venturi nozzle are each in substantially parallel nozzle 14, through hose 19 to the inlet 21 of the turbocharger relation. 12, through the throttle 20 and the intake manifold 22, for 4. The system of claim 2, further comprising: purging at the internal combustion engine 25. The canister 16 a first hose connecting the inlet of the purge valve with the and thus the fuel tankare protected from manifold pressure by canister, use of the check valve 22". a second hose connecting the outlet of the purge valve with 0017. When the turbocharger 12 is at idle, manifold the intake manifold, vacuum draws hydrocarbon vapors from the canister 16 a third hose connecting an outlet of the turbocharger with through the purge valve 18, through hose 23 to the intake an inlet of the venturi nozzle, and manifold 22, to be purged in the engine 25. The check valve a fourth hose connecting an outlet of the Venturi nozzle 24' prevents the manifold vacuum pressure from communi with the inlet of the turbocharger. cating with the venturi nozzle 14. 5. A turbo purge module for an emission management 0018 To reduce under-hood packaging space, an axis D of system of a turbocharged vehicle, the vehicle having a vapor the inlet 28 of the purge valve 18' is substantially parallel with collection canister constructed and arranged to be connected the axis E of the outlet 30 of the purge valve 18 and with the with a fuel tank to receive hydrocarbon vapors from the fuel axis F of the venturi nozzle 14'. The use of the turbo purge tank, an intake manifold for drawing air into an internal module 26 reduces cost for hoses and mounting brackets combustion engine of the vehicle, and a turbocharger con since fewer of these components are required, reduces the nected with the intake manifold to provide pressurized air to number of connections in the system 10", which reduces the the engine, the module comprising: potential leakage points, and reduces flow variability since a purge valve having an inlet constructed and arranged to the module 26 is consistent from application to application. be connected to the vapor collection canister, and an 0019. The foregoing preferred embodiments have been outlet constructed and arranged to be connected to the shown and described for the purposes of illustrating the struc intake manifold, tural and functional principles of the present invention, as a venturi nozzle constructed and arranged to receive pres well as illustrating the methods of employing the preferred surized air from the turbocharger, when the turbocharger embodiments and are subject to change without departing is operating, to create a vacuum to draw vapors from the from such principles. Therefore, this invention includes all canister through the purge valve to an inlet of the turbo modifications encompassed within the spirit of the following charger and the intake manifold to be purged in the claims. engine, What is claimed is: a first check valve to prevent pressure from the intake 1. An evaporative emission management system for a manifold from reaching the canister when the turbo vehicle comprising: charger is operating, and a second check valve to prevent vacuum pressure from the a vapor collection canister constructed and arranged to be intake manifold from communicating with the Venturi connected with a fuel tank to receive hydrocarbon nozzle when the turbocharger is at idle, with vapor from vapors from the fuel tank, the canister being drawn through the purge valve and the an intake manifold for drawing air into an internal com intake manifold to be purged in the engine, bustion engine of the vehicle, wherein the purge valve, venturi nozzle, first check valve, a turbocharger connected with the intake manifold to pro and second check valve are integrated into a single com vide pressurized air to the engine, and ponent. a single, integral turbo purge module comprising: 6. The module of claim 5, wherein the purge valve is a purge valve having an inlet connected to the canister coupled directly with the each of the first and second check and an outlet connected to the intake manifold, valves and the venturi nozzle is coupled directly with the a venturi nozzle constructed and arranged to receive second check valve, without the use of flexible hoses. pressurized air from the turbocharger, when the tur 7. The module of claim 5, wherein an axis of the inlet of the bocharger is operating, to create a vacuum to draw purge valve, an axis of the outlet of the purge valve, and an vapors from the canister through the purge valve to an axis of the venturi nozzle are each in substantially parallel inlet of the turbocharger and the intake manifold to be relation. purged in the engine, 8. A method of providing an evaporative emission manage a first check valve to prevent pressure from the intake ment system for a vehicle, the vehicle having a vapor collec manifold from reaching the canister when the turbo tion canister constructed and arranged to be connected with a charger is operating, and fuel tank to receive hydrocarbon vapors from the fuel tank, an US 2013/0152904 A1 Jun. 20, 2013

intake manifold for drawing air into an internal combustion nozzle when the turbocharger is at idle, with vapor from engine of the vehicle, and a turbocharger connected with the the canister being drawn through the purge valve and the intake manifold to provide pressurized air to the engine, the intake manifold to be purged in the engine, and method comprising the steps of integrating the purge valve, the Venturi nozzle, the first providing a purge valve having an inlet constructed and check valve, and the second check valve into a single arranged to be connected to the vapor collection canister, component. and an outlet constructed and arranged to be connected 9. The method of claim 8, wherein the integrating step to the intake manifold; a venturi nozzle constructed and includes coupling the purge valve directly with the each of the arranged to receive pressurized air from the turbo first and second check valves and coupling the Venturi nozzle charger, when the turbocharger is operating, to create a directly with the second check valve, without the use of vacuum to draw vapors from the canister through the flexible hoses. purge valve to an inlet of the turbocharger and the intake manifold to be purged in the engine; a first check valve to 10. The method of claim 8, wherein the integrating step prevent pressure from the intake manifold from reaching includes ensuring that an axis of the inlet of the purge valve, the canister when the turbocharger is operating; and a an axis of the outlet of the purge valve, and an axis of the second check valve to prevent vacuum pressure from the Venturi nozzle are each in Substantially parallel relation. intake manifold from communicating with the Venturi k k k k k