EP1904732B1 - Vorrichtung zur unterdruckerzeugung in einem kraftfahrzeug - Google Patents

Vorrichtung zur unterdruckerzeugung in einem kraftfahrzeug Download PDF

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Publication number
EP1904732B1
EP1904732B1 EP06754653A EP06754653A EP1904732B1 EP 1904732 B1 EP1904732 B1 EP 1904732B1 EP 06754653 A EP06754653 A EP 06754653A EP 06754653 A EP06754653 A EP 06754653A EP 1904732 B1 EP1904732 B1 EP 1904732B1
Authority
EP
European Patent Office
Prior art keywords
throttle
vacuum
bore
control bore
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06754653A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1904732A1 (de
Inventor
Dietmar Bergbauer
Oliver Kirmess
Bjørn NORDMANN
Helmut Oswald
Uwe Steinmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Publication of EP1904732A1 publication Critical patent/EP1904732A1/de
Application granted granted Critical
Publication of EP1904732B1 publication Critical patent/EP1904732B1/de
Anticipated expiration legal-status Critical
Not-in-force legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/1055—Details of the valve housing having a fluid by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/101—Special flap shapes, ribs, bores or the like
    • F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/024—Increasing intake vacuum

Definitions

  • the invention relates to a device for generating and / or amplifying a negative pressure in a motor vehicle, in particular for operating a vacuum brake booster, comprising a throttle unit, which at least one throttle body and a throttle in a throttle body in an angular range rotatably arranged throttle valve for regulating a fluid flow in the throttle passage, wherein the device further comprises means for generating and / or amplifying a negative pressure, wherein the means are formed as integrated into the throttle body vacuum booster means, which act according to the principle of Bernoulli in the manner of a suction jet pump to an increased negative pressure for at least one To generate brake booster.
  • a generic device for generating negative pressure in a motor vehicle with an internal combustion engine is already versatile application.
  • the provision of the negative pressure in motor vehicles is necessary in particular for the function of vacuum-supplied brake boosters.
  • the difference between the atmospheric pressure and the negative pressure for enhancing the braking force on the brake cylinder is utilized.
  • Safe operation of the brake booster and thus the brake system of the motor vehicle therefore always requires to store a sufficient negative pressure in the vacuum chamber of the brake booster by means of a check valve to ensure sufficient braking force in any driving situation.
  • the quantity control element for the power control of the internal combustion engine generally regulates the intake air flow and thus the power of the internal combustion engine via a rotational adjustment of a throttle valve.
  • an intake air suction jet pump is sometimes provided in parallel with the throttle body.
  • the corresponding part of the intake air flow as a propellant gas can be generated according to the law of Bernoulli as a result of the well-known principle of cross-sectional constriction and the associated increase in speed in a venturi increased negative pressure.
  • a device for generating and / or amplifying the negative pressure in a pneumatic brake booster for the brake system of a motor vehicle driven by an internal combustion engine by means of a suction jet pump is proposed in which the suction jet pump is arranged in the exhaust system of the internal combustion engine and is used as propellant the exhaust gas mass flow of the internal combustion engine. Disadvantageous in this arrangement is the position of the device in the hot exhaust gas of the internal combustion engine, which severely limits the possible uses of various thermally unstable materials.
  • the exhaust gas mass flow is proportional to the throttle position and engine speed dependent, so that at a closed throttle and thus a low charge air flow and the exhaust gas mass flow does not produce sufficient flow in each operating situation of the motor vehicle to ensure a sufficient negative pressure for the operation of the pneumatic brake booster.
  • the DE 195 03 568 A1 relates to a quantity-controlled internal combustion engine having a suction jet pump arranged in a bypass to the quantity control member or throttle valve for generating negative pressure of a servomotor, in particular a brake booster, wherein a blocking and / or throttle valve provided in the bypass upstream of the suction jet pump is arranged.
  • a blocking and / or throttle valve provided in the bypass upstream of the suction jet pump is arranged.
  • a throttle body for an internal combustion engine of a motor vehicle with a throttle valve adjustable in a channel, wherein the region of the channel is bridged by a throttle valve of a bypass channel.
  • a throttle valve of a bypass channel In the bypass channel is seen in the flow direction, first an electrically switchable valve and then a Venturi tube arranged.
  • a vacuum device for a brake booster In the entrance area of the Venturi tube a vacuum device for a brake booster is connected.
  • This arrangement also requires an external structure to the throttle body, which must be integrated in the engine compartment.
  • a valve is required, which must be controlled via an actuator.
  • the invention includes the technical teaching that the means are formed as at least one extending through the throttle body control bore, the control bore opens in the throttle passage in an orifice to generate a negative pressure in the control bore, and that the throttle has a thickening on the control bore side to increase the negative pressure over an enlarged flap opening angle range.
  • This solution has the advantage that the means by integration into the throttle body do not appear as individual parts, and thus need not be separately integrated into the engine compartment. It eliminates the need to provide electrically or via a mechanical coupling to the internal combustion engine driven vacuum generating or amplifying devices.
  • the tap of the negative pressure takes place directly on the integrated in the housing of the throttle flow geometry, which uses the principle of operation of a suction jet pump.
  • a throttle unit in internal combustion engines which are controlled according to the quantity principle (such as the gasoline engine), already exists.
  • the negative pressure within the fluidic laws can be improved for each idling or thrust operating point of the vehicle or the internal combustion engine, in particular to operate a pneumatically operated vacuum brake booster such that at any time an increased brake power assistance is available.
  • the vacuum connection takes place on the housing of the throttle unit, wherein the vacuum supply of the brake booster only a hose or pipe connection with a check valve is necessary, which is easily connected to the vacuum port.
  • This connection can be present either in addition to the existing vacuum supply, or the conventional vacuum supply to the intake manifold can be omitted entirely, if sufficiently large flow cross sections can be displayed. In this case, no additional component is necessary.
  • the overall system of negative pressure generation can thus be characterized in that the generation of the negative pressure takes place exclusively via the control bore in the throttle body and other negative pressure supplies omitted.
  • the means for generating and / or amplifying a negative pressure are designed as throttle valve angle range-dependent negative pressure boosting means in order to generate an increased negative pressure in a certain range of the throttle valve opening.
  • the means for generating negative pressure are such that the negative pressure tap takes place in this throttle angle range in the zone of the highest flow velocity.
  • the means are designed as at least one control bore extending through the throttle body, wherein the control bore opens in the throttle passage in an orifice to generate a negative pressure in the control bore.
  • the arrangement of the control bore is suitably inclined at an angle relative to the flow direction.
  • the angle ⁇ must have a value greater than 0 ° in order to avoid a congestion effect.
  • this control bore opens in the downstream in the flow direction half of the throttle channel. This has the advantage that at idle without additional loads with minimal flap opening of the normal Saugrohrunterdruck applied. Accordingly, under certain circumstances, the previous Saugrohrunterdruckan gleich the brake booster can be replaced by the connection to the control bore.
  • the orifice is to be positioned to extend the brake vacuum boost over a larger angular range of throttle opening.
  • the design criteria are, firstly, the maximum possible flow rate (corresponds to the maximum increase in negative pressure) and, secondly, the throttle valve angle range, via which the negative pressure increase can be used. As near-idle operation of the engine, speeds of approx. 800rpm to 1000rpm.
  • a further measure improving the invention provides that the throttle valve has a thickening on the control bore side in order to achieve an increase in the negative pressure over an enlarged valve opening angle range.
  • the throttle plate has a disc shape in a known manner, wherein the disc on the side of the control bore has a half-sided thickening, which in turn can cause a narrowing of the flow and thus a reduction of the static pressure according to the Bernoulli principle in the area concerned.
  • the control bore preferably opens into the throttle passage in an area at least partially swept by the throttle flap.
  • the means for generating and / or amplifying a negative pressure are designed as at least one throttle bore arranged as a bypass to the throttle channel and in the throttle body, in order to produce an accelerated fluid flow in the throttle bore.
  • the flow of the intake air used as propellant gas is passed through a separate throttle bore, wherein the throttle channel and the throttle bore extend parallel to at least a partial length of the throttle body.
  • this embodiment lies in modified form, a separate Saugstrahlpumpenan extract, wherein this invention is integrated in the throttle body.
  • the throttle bore has a flow restriction in the manner of a Venturi tube in order to accelerate the fluid flow in the throttle bore.
  • the control bore can open in the region of the flow constriction in the throttle bore, to thereby produce a further increase in the negative pressure.
  • illustrated device 1 comprises a throttle unit 2, which has a throttle body 3, through which a throttle channel 4 extends.
  • the throttle unit 2 is arranged in the intake air tract of the internal combustion engine (not shown), wherein the throttle duct 4 forms a connection between the hose or pipe connection of the air filter and the air collector of the internal combustion engine.
  • a throttle valve 5 is rotatably arranged, through which with a rotation of the air mass flow of the intake air can be changed.
  • the throttle valve 5 is shown in the illustrated embodiment in a substantially closed position, so that the air mass flow of the intake air assumes a low value.
  • the throttle body 3 is made in one piece, in this case fittings, mounting areas, mounting holes and the like are formed on the throttle body 3 in addition to other components.
  • a control bore 6 extends, which opens on the one hand in the throttle channel 4 and on the other hand merges into a pipe section to which a vacuum hose is connectable.
  • This - not shown vacuum hose - forms a connection between the arranged in the throttle body means for generating negative pressure and a pneumatic Brake booster or other functional units, which represent a vacuum consumer.
  • On the rear part of the throttle body an electromechanical control 7 is arranged, via which in particular the control of the throttle valve 5 takes place.
  • the electrical connection of the controller 7 via a contact means 8, which allows an electrical connection to the central control electrics of the motor vehicle.
  • FIG. 2 shows a sectional view of a first embodiment of the device 1, comprising a throttle unit 2, wherein the control bore 6 opens into the throttle channel 4.
  • the mouth 9 is arranged directly in the region in which the throttle valve 5 is adjacent to the throttling passage wall 11 when idling.
  • the flow restriction increases the flow rate of the air mass flow of the intake air, which according to the Bernoulli's theorem, the static pressure decreases, so that a negative pressure arises, which continues in the control bore 6. So that the air mass flow moving in the flow direction 12 does not press into the control bore 6, it is employed in the towing direction under an angle of attack ⁇ > 0 ° measured to the cross-sectional plane of the throttle channel 4.
  • FIG. 3 is another embodiment of the device 1 again, which is shown in a sectional view through the throttle unit 2, which has a control bore 6, which opens into a throttle bore 10.
  • the throttle bore 10 is arranged in the throttle channel 4 and extends in the flow direction 12, so that a portion of the intake air is diverted from the throttle channel 4 and the throttle bore 10 flows through.
  • the throttle bore 10 has a flow constriction 13 in the manner of a Venturi tube, whereby at a subcritical pressure ratio across the throttle acceleration the intake air flow in the flow constriction 13 can be reached.
  • the control bore 6 opens in the region of the flow constriction 13 in the throttle bore 10, so that here too a stronger suction effect can be exploited.
  • the throttle valve 5 When the throttle valve 5 is closed or almost closed, the air mass flow through the throttle passage is minimized, and the throttle bore 10 acts as a bypass, in which an increased flow velocity prevails, and an increased negative pressure can be tapped via the control bore 6 in comparison to the intake manifold vacuum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
EP06754653A 2005-07-07 2006-07-01 Vorrichtung zur unterdruckerzeugung in einem kraftfahrzeug Not-in-force EP1904732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005031744A DE102005031744A1 (de) 2005-07-07 2005-07-07 Vorrichtung zur Unterdruckerzeugung in einem Kraftfahrzeug
PCT/EP2006/006427 WO2007006441A1 (de) 2005-07-07 2006-07-01 Vorrichtung zur unterdruckerzeugung in einem kraftfahrzeug

Publications (2)

Publication Number Publication Date
EP1904732A1 EP1904732A1 (de) 2008-04-02
EP1904732B1 true EP1904732B1 (de) 2010-06-02

Family

ID=36930386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754653A Not-in-force EP1904732B1 (de) 2005-07-07 2006-07-01 Vorrichtung zur unterdruckerzeugung in einem kraftfahrzeug

Country Status (8)

Country Link
US (1) US8261716B2 (it)
EP (1) EP1904732B1 (it)
KR (1) KR20080027934A (it)
CN (1) CN101258310B (it)
AT (1) ATE470060T1 (it)
DE (2) DE102005031744A1 (it)
IT (1) ITRM20060351A1 (it)
WO (1) WO2007006441A1 (it)

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* Cited by examiner, † Cited by third party
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DE102008031317A1 (de) 2008-07-02 2010-01-07 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Kompressorsystem mit beschränktem Ansaugladedruck
DE102010003005A1 (de) * 2010-03-18 2011-09-22 Robert Bosch Gmbh Drosseleinrichtung
DE102012002759A1 (de) 2012-02-11 2013-08-14 Volkswagen Aktiengesellschaft Hybridantrieb und Pumpe mit einem solchen Hybridantrieb
US10082092B2 (en) 2014-04-03 2018-09-25 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle
DE102014215004B4 (de) 2014-07-30 2022-01-27 Volkswagen Aktiengesellschaft Brennkraftmaschine mit Bypasskanal zur Verstärkung des Unterdrucks in einem Bremskraftverstärker
US9651004B2 (en) 2015-05-08 2017-05-16 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle comprising a hollow passage
US9885296B2 (en) 2015-11-18 2018-02-06 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle body comprising a slidable throttle valve
US10060365B2 (en) 2015-11-18 2018-08-28 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle body comprising a slidable throttle valve
RU2017106023A (ru) 2016-03-08 2018-08-22 Форд Глобал Текнолоджиз, Ллк Способ и система для создания разрежения с помощью корпуса дросселя, содержащего скользящую дроссельную заслонку
US10119503B2 (en) 2016-03-25 2018-11-06 Ford Global Technologies, Llc Method and system for vacuum generation in an intake
US9964080B2 (en) 2016-08-25 2018-05-08 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle
US9890715B1 (en) * 2016-09-16 2018-02-13 Ford Global Technologies, Llc Vacuum for a vacuum consumption device
US10393031B2 (en) 2017-06-26 2019-08-27 Ford Global Technologies, Llc Methods and system for a throttle
US10590892B2 (en) 2017-12-14 2020-03-17 Ford Global Technologies, Llc Methods and systems for vacuum generation using a throttle

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Also Published As

Publication number Publication date
ATE470060T1 (de) 2010-06-15
US8261716B2 (en) 2012-09-11
KR20080027934A (ko) 2008-03-28
DE102005031744A1 (de) 2007-01-11
US20090095253A1 (en) 2009-04-16
EP1904732A1 (de) 2008-04-02
CN101258310B (zh) 2012-02-01
ITRM20060351A1 (it) 2007-01-08
DE502006007111D1 (de) 2010-07-15
WO2007006441A1 (de) 2007-01-18
CN101258310A (zh) 2008-09-03

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