Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
  • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
  • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/65—Constructional details of EGR valves
  • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/65—Constructional details of EGR valves
  • F02M26/72—Housings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
  • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
  • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves

Definitions

• the invention relates to an exhaust gas circulation valve in an engine and to a motor and a motor vehicle comprising such a valve.
• the current engines include an exhaust gas recirculation pollution control system which consists of a pipe for passing the exhaust gas to the intake, together with a heat exchanger for cooling the exhaust gases. burnt gas and a valve, commonly called Exhaust Gas Recirculation (EGR) valve, whose opening is controlled by an engine control computer to regulate the flow of burnt gas reintroduced towards the admission.
• EGR Exhaust Gas Recirculation
• the operating principle of this type of valve is thus based on the controlled rotation of a flap, which can pass from a full open position to let the exhaust gas, to a closed position to block the passage .
• FIGS. 1 and 2 show an exhaust gas recirculation valve 10 according to the prior art.
• This valve 10 comprises a body 12 defining a main conduit 14 for the flow of exhaust gases towards the outside of the vehicle via an exhaust pipe and an auxiliary duct 16 called exhaust gas recirculation.
• the engine control valve 10 has a flap 18, which is pivotally mounted on an axis 20 intended to rotate about an axis of rotation 21, so that said axis 20 separates the flap 18 into a first part 18a and into a second part 18b.
• the axis 20 has a substantially cylindrical shape, a first end 22 and a second end 24 are engaged in plain bearings 26 of the body 12 of the valve 10.
• the first end 22 is connected to actuating means (not shown) , such as an electric motor for example, the rotation of the axis 20 between its open and closed positions, controlled by the aforementioned motor control computer.
• the flap 18 comprises two flanges 28, 30 each provided with an insertion hole of the axis 20.
• the axis 20 and the flap 18 are secured in rotation by suitable coupling means.
• a shim 30 between the flange 28 and the valve body 10. This spacer 30 forms an abutment limiting the displacement of the flap 18 in the direction of the valve body 10 during the insertion of the axis 20.
• the use of a shim 30 for adjusting the axial positioning flap 18 is difficult to achieve and complicates the mounting of the EGR valve in the engine.
• the invention aims in particular to provide an economical and effective solution to these problems.
• a valve in particular for recirculating the exhaust gas from an engine for a motor vehicle, comprising a valve body, a flap and means for coupling the shutter in rotation with an axis so as to the shutter can be moved in rotation between an open position of the flow of a fluid through the flap and a closed position of the flap for stopping the flow of fluid through the flap, characterized in that the flap comprises at least one flap extending substantially perpendicular to the axis and having a notch housing the axis.
• the integration of at least one notch in a tab of the flap makes it possible to mount the flap on the axis by a perpendicular displacement of the flap with respect to the axis.
• the coupling in rotation of the shutter with the axis can be achieved in many ways.
• the notch has a substantially U-shaped, the two parallel faces vis-à-vis each comprise a flat surface applied to a flat corresponding to the axis.
• the rotational coupling is thus achieved simply and effectively by means of flats.
• the flats of the axis are formed on a bottom face of an annular groove.
• the lateral faces serve as stop for axial positioning of the flap on the axis.
• the valve comprises two tabs of the aforementioned type.
• Each leg thus comprises a notch with two parallel flats facing each other.
• the invention also relates to a motor vehicle, comprising a motor incorporating a valve as described above.
• the invention also relates to a motor vehicle, characterized in that it is equipped with a device of the aforementioned type.
• the invention also covers a method of assembling the valve described above, characterized in that it comprises the steps of successively: inserting the axis of rotation into the valve body, then engaging said axis at least a tab of the shutter on the flap so that the axis is housed in the notch of said tab.
• FIG. 1 is a schematic perspective view of a valve according to the prior art wherein the flap is in the open position or recirculation of the exhaust gas;
• FIG. 2 is a schematic perspective view and in a sectional plane perpendicular to the axis of the valve of Figure 1;
• FIG. 3 is a schematic view of a valve of Figures 1 and 2 and in a section plane containing the axis of rotation;
• FIG. 4 is a schematic view along a sectional plane parallel to the axis of rotation of a valve according to the invention.
• FIG. 5 is a view along a section plane perpendicular to the axis and passing through a groove of the axis;
• FIG. 6 is a schematic perspective view of the connection of a flap and the axis in a valve according to the invention.
• axis designates the mechanical part 20, 120 on which the flap 18, 1 18 is fixed and the term “axis of rotation” designates a virtual line around which the axis rotates and consequently the flap .
• the valve (1 10 comprises a body (1 12) of valve (1 10), a flap (1 18) and means for coupling in rotation of the flap (1 18) with an axis (120 ) so that the flap (1 18) is movable in rotation between an open position of the flow of a fluid at through the shutter (1 18) and a closed position of the shutter (1 18) to stop the flow of fluid through the shutter (1 18).
• the shutter 1 18 comprises a support 134 formed of two tabs 136, 138 extending substantially perpendicular to the axis 120.
• the tabs 136, 138 are spaced apart from each other in the direction of the rotation axis 121.
• Each tab 136, 138 forms a fork having a notch 140 in which is engaged the axis 120.
• the axis 120 comprises two annular grooves 140 spaced apart from each other and each receiving a tab 136, 138 of the shutter 1 18.
• Each notch 140 of shutter 1 18 has a U-shape and comprises two internal lateral faces facing each other connected by a bottom face 144.
• the internal lateral faces each comprise a 142.
• the flats 142 of a notch are parallel to each other.
• Each groove 140 of the axis 120 comprises a bottom wall 146 having two flats 148, 150 parallel and diametrically opposite to each other.
• the flats 148, 150 of the bottom wall 146 of the groove 140 are thus configured to cooperate with the flats 142 of the notch 140 of the support 134 so as to couple in rotation around the axis of rotation 121 the flap 1 18 and its support 134 with the axis 120.
• the axis 120 is first inserted into the body 1 12 of the valve 1 10 and the tabs 136, 138 of the shutter 1 18 are engaged in the grooves 140 in order to position the flap 1 axially 18 relative to the axis and rotatably couple the shutter 1 18 with the axis 120.
• the support 134 of the shutter 1 18 comprises a web 152 connecting the tabs 136, 128 of the shutter 1 18.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Exhaust-Gas Circulating Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52345367

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2014
  • 2014-11-06 FR FR1460713A patent/FR3028302B1/fr active Active
• 2015
  • 2015-11-05 EP EP15804882.7A patent/EP3215767A1/de not_active Withdrawn
  • 2015-11-05 WO PCT/FR2015/052993 patent/WO2016071641A1/fr active Application Filing

Non-Patent Citations (2)

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