EP3728822A1 - Regelventil für einen verbrennungsmotor und verfahren zur regelung eines regelventils - Google Patents
Regelventil für einen verbrennungsmotor und verfahren zur regelung eines regelventilsInfo
- Publication number
- EP3728822A1 EP3728822A1 EP18826997.1A EP18826997A EP3728822A1 EP 3728822 A1 EP3728822 A1 EP 3728822A1 EP 18826997 A EP18826997 A EP 18826997A EP 3728822 A1 EP3728822 A1 EP 3728822A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- valve
- control valve
- internal combustion
- housing
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
-
- 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
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
-
- 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
- F02M26/66—Lift valves, e.g. poppet valves
- F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
-
- 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
- F02M26/73—Housings with means for heating or cooling the EGR valve
-
- 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
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/002—Electric heating means
Definitions
- the invention relates to a control valve for an internal combustion engine with a housing in which a channel is formed between an inlet and an outlet, a valve body which is fixed to a valve rod and on a valve seat on the housing, which defines a flow cross-section in the channel, lowered and can be lifted from the valve seat, a valve guide member which is arranged in a central opening of the housing and in which the valve rod is guided, an actuator by means of which the valve rod is movable, and a heating element.
- Such control valves are well known from the prior art. They are used for example as exhaust gas recirculation or secondary air valves in the motor vehicle. Usually, these valves are actuated by means of electrical actuators whose rotational movement is converted by a gear in a translational movement of a valve rod on which the corresponding valve seat with the valve body is arranged.
- the installation in particular in the exhaust gas region of a motor vehicle, means that such a control valve is exposed to a wide variety of loads.
- Both the pollutants present in the exhaust gas, as well as the external environmental influences and temperatures affect the function of such a valve.
- dirt or even exhaust particles can lead to a stiffness of the valve up to the setting of the valve due to forming deposits or adhesions.
- extreme weather conditions such as heavy frost can also Freezing of the valve rod in the guide or the valve body on the valve seat occur especially in still cold engine.
- FR 2 944 333 To effectively prevent these disadvantages, it is known from FR 2 944 333 to provide a guide or bearing sleeve around an annular element with heating wires, which either serves directly as a valve guide or at least rests directly on the valve guide. These heating wires heat up by energizing, so that the valve guide is heated. As a result, existing deposits on the valve stem to be dissolved by pyrolysis. Such an embodiment is complicated and therefore expensive in structural design. In which states this pyrolysis is carried out is not disclosed.
- valve guide can also be heated via one or more PTC elements.
- the heating element itself forms the valve guide or is directly installed with this. A heating of these heating elements takes place in particular, if a sticking of the valve stem is detected by frozen water.
- the heating element is annular and is arranged in a corresponding annular axial groove on the housing and surrounding the valve guide member, the heat is delivered to the complete housing and thus both the valve guide and in the direction of the valve seat, whereby deposits on both the valve rod as well as on the valve body can be prevented.
- a heating element is simply insertable into the housing on the actuator side and thus can be installed inexpensively and without damage with little effort.
- the object is achieved by the heating element is energized in operating areas of the internal combustion engine, in which a condensate formation is expected.
- a condensate formation is expected.
- Contaminant water often contains pollutants which form deposits that are difficult to detach by subsequent evaporation of the water, which is prevented by the present process, since significantly fewer deposits form at all.
- Such condensate formations with the following deposits are both in Operating areas of the engine to be expected in which a lot of water vapor is dissolved in the exhaust gas as well as in areas where the exhaust gas temperatures are not so high, such as in low load conditions.
- a particularly simple installation of the heating element results when a return spring is biased axially against the heating element, whereby the heating element is held in the groove.
- a return spring is biased axially against the heating element, whereby the heating element is held in the groove.
- the heating element is pressed into the axial groove. This allows a tight fit of the heating element without the installation of the spring. A release is so reliably prevented. Furthermore, due to the close tolerance, an entire surface of the heating element is produced to the housing, whereby the heat transfer is improved.
- the heating element and the valve seat are arranged concentrically to the valve rod and have a diameter such that viewed in the axial direction at least partially overlapping the valve seat and the heating element is present. Accordingly, a minimum distance between the valve seat and the heating element is achieved, whereby more heat can reach the valve seat.
- the heating element is a PTC heating element, which is inexpensive to produce and requires little space.
- the heating element is arranged at a distance from the valve guide member. This simplifies the assembly by independent from the management body installation.
- the heating element is connected via power lines, which are guided through the housing to the outside, with a plug which is connected to the engine control unit. So no power lines must be passed through the housing, but the heating element can be mounted directly to the plug together and controlled according to the values of the motor control.
- a moisture sensor is arranged in the channel.
- a heating of the heating element can then be carried out, as a result of which condensation can be reliably avoided.
- An arrangement of a temperature sensor in the channel or on the housing additionally improves the control in order to prevent condensation by avoiding this by heating the heating element.
- a continuation of the method is closed on a condensate formation in dependence on engine map data. These are stored in the engine control, so that in operating conditions in which condensation is expected, can be responded by heating the heating element, so that energy consumption occurs only when actually heating is necessary.
- condensate formation is concluded as a function of the measured values of the temperature sensor and / or the moisture sensor, and thus the heating element is heated in order to be able to reliably reduce solid deposits due to condensate formation.
- a further improvement is achieved if the heating element is energized at outside temperatures less than 0 ° C before the engine start, in order to cancel any existing ice formation and so to ensure the functionality of the control valve already at engine start. This can for example be done immediately when opening the vehicle or when pressing the central locking.
- Such a control valve has the advantage of a possible heating of the entire wall surfaces and in particular the surfaces on which a relative movement of the components takes place to each other.
- This is used according to the invention to avoid condensation in the control valve, because it has been shown that in particular solid deposits that limit the functioning of the control valve, caused by impurities dissolved in the water, which form the solid deposits on evaporation of the water.
- the construction of the control valve according to the invention and the method according to the invention for regulating the valve thus ensure the functionality and mobility of the valve over a long service life.
- the energy consumption is reduced because only in the phases is energized, in which the formation of such deposits is expected. By preventing condensation in the valve, the life and controllability of the control valve is so reliably improved as deposits are reduced.
- control valve according to the invention for an internal combustion engine as well as the associated method for regulating this valve will be described below with reference to an exhaust gas recirculation valve shown in FIG.
- the figure shows a side view of a control valve according to the invention in a partially sectioned illustration.
- the control valve shown in the figures which can be used in particular as an exhaust gas recirculation valve in an internal combustion engine, consists of a housing 10 which is inserted into an opening of a flow housing, not shown, through which exhaust gas flows.
- the housing 10 has a radial inlet 12 and an axial outlet 14, which are connected to one another via a channel 16, so that exhaust gas via the inlet 12 into the channel 16 and with open control valve via the outlet 14 again flow out of the housing 10 can.
- a flow cross-section of the housing 10 is surrounded over its circumference by a valve seat 18, which is fastened to the housing 10, but can also be formed directly on the housing 10.
- the flow cross-section can be controlled via a valve body 20, which can be lowered onto the valve seat 18 or lifted off from it.
- the valve body 20 is attached to a valve rod 22, at its opposite end to the valve body 20 a coupling body 24 is fixed, in which a link 26 is formed, in which a pin 28 projects, on which a ball bearing 30 is arranged, which in the backdrop 26 rolls off.
- the Pin 28 is attached to an eccentric 32, which serves as a driven member of a transmission 34 which is driven by an electric motor 36.
- the gear 34 forms with the electric motor 36 an actuator 38 which is arranged in an actuator housing 40.
- valve rod 22 is axially guided in a valve guide member 42 which is fixed in a central, axially extending opening 44 of the housing 10, in which between the valve guide member 42 and the coupling body 24, a seal 46 is arranged, which surrounds the valve rod 22 immediately.
- the valve rod 22 is surrounded by a shielding element 47, which axially adjoins the valve guide member 42 and has only a very small gap to the valve rod 22 at its opposite end, which projects from the opening 44 in the channel 16 , so that deposits on the valve rod 22 are removed when the valve rod 22 is actuated.
- the eccentric 32 is arranged in a gear chamber 48 which, viewed in the direction of the channel 16, is delimited by a wall surface 50.
- an annular axial groove 52 is arranged concentrically to the valve rod 22, in which according to the invention an annular heating element 54 is fixed.
- This heating element 54 is designed as an electric PTC heating element, to which a plug 56 is formed for electrical connection via power lines 55, wherein the power lines 55 protrude from the gear chamber 48 through the housing 10, so that the plug 56 via further lines in the valve outer space with an engine control unit 57 can be connected.
- a return spring 58 is additionally arranged, which surrounds the valve rod 22 and is clamped between the heating element 54 and the coupling body 24, so that the return spring 58, the valve body 20 always loaded in the direction of the valve seat 18. additionally As a result, the heating element 54 is pressed axially into the axial groove 52 and thus fixed. In particular, the heat of the heating element 54 is discharged when energized via a bottom 60 of the heating element 54 to the housing 10, wherein a particularly good heat-conducting contact with the groove bottom of the housing 10 is ensured by the axial bias.
- This contact causes the heat via an axially first housing portion 62, in which the heating element 54 is arranged is particularly well directed to a second axial housing portion 64 in which the valve seat 18 is formed, so that this is sufficiently heated.
- the diameter of the heating element 54 is possibly as large as the diameter of the valve seat 18 in order to overcome the smallest possible distance in the heat transfer. Accordingly, not only the nearby located valve guide member, but also the valve seat and the surrounding walls of the channel 16 is heated, so that condensation in the region of the valve on the cold components can be largely prevented.
- the heating element 54 of the control valve according to the invention is always energized in the phases in which a condensation of water is to be expected from the exhaust gas actually. This is to be expected especially in phases in which a low exhaust gas temperature or low external temperatures are to be expected.
- a corresponding characteristic map in which various operating states of the internal combustion engine and the condensation to be expected in these operating states are stored can then be used to control the heating element 54. This can also be done depending on the respective position of the exhaust gas recirculation valve.
- the measured values of a temperature sensor 68 can also be used for activation, which either measures the outside temperature, as a function of which the heating element is energized or which can be arranged directly in the channel 16 make this energization depending on the actual temperature in the channel 16.
- a temperature sensor 68 can also be used for activation, which either measures the outside temperature, as a function of which the heating element is energized or which can be arranged directly in the channel 16 make this energization depending on the actual temperature in the channel 16.
- a moisture sensor 66 can also be arranged in the channel 16, as a function of which the flow of the Fleizimplantations 54, whereby also reliably a condensation between the relatively movable parts of the control valve can be prevented.
- Such a designed control valve has significantly fewer deposits, as solid residues that arise due to the water present in the exhaust gas and settle on the wall surfaces and moving parts of the valve, are reliably reduced. A burn off the valve rod or the valve seat is thus often no longer necessary.
- the method according to the invention results in that heating takes place only when formation of deposits due to condensation is to be feared. Both in phases in which much water vapor is present in the exhaust gas and at low exhaust gas temperatures or at high temperature differences between the wall surfaces and the exhaust gas there is the possibility of increased condensation, which is largely avoided by the heating of the entire control valve by means of the Fleizettis.
- the heating can be switched on without the control valve To heat constantly, so that the energy consumption is reduced by the formation of deposits, not as in known processes dissolved, but the emergence is prevented. It should be clear that other constructive embodiments of the control valve or arrangements of the heating element are optionally suitable to carry out the inventive method.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017130673.0A DE102017130673A1 (de) | 2017-12-20 | 2017-12-20 | Regelventil für einen Verbrennungsmotor und Verfahren zur Regelung eines Regelventils |
| PCT/EP2018/084681 WO2019121284A1 (de) | 2017-12-20 | 2018-12-13 | Regelventil für einen verbrennungsmotor und verfahren zur regelung eines regelventils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3728822A1 true EP3728822A1 (de) | 2020-10-28 |
Family
ID=64901503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18826997.1A Withdrawn EP3728822A1 (de) | 2017-12-20 | 2018-12-13 | Regelventil für einen verbrennungsmotor und verfahren zur regelung eines regelventils |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3728822A1 (de) |
| CN (1) | CN111492135B (de) |
| DE (1) | DE102017130673A1 (de) |
| WO (1) | WO2019121284A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237100A (zh) * | 2020-03-09 | 2020-06-05 | 广西玉柴机器股份有限公司 | 一种egr阀和混合器加热控制方法及系统 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3068746B2 (ja) * | 1994-06-17 | 2000-07-24 | 三菱電機株式会社 | 電動式流量制御弁 |
| DE19801387A1 (de) * | 1998-01-16 | 1999-07-22 | Pierburg Ag | Abgasrückführventil |
| FR2902470B1 (fr) * | 2006-06-19 | 2010-12-10 | Peugeot Citroen Automobiles Sa | Systeme de rechauffage du siege de soupape d'une vanne egr |
| FR2944333A1 (fr) | 2009-04-09 | 2010-10-15 | Peugeot Citroen Automobiles Sa | Vanne comprenant un element chauffant electrique |
| US9803590B2 (en) * | 2013-02-22 | 2017-10-31 | Ford Global Technologies, Llc | Humidity sensor diagnostics |
| JP2015178777A (ja) * | 2014-03-18 | 2015-10-08 | トヨタ自動車株式会社 | 内燃機関 |
| DE102014109273A1 (de) | 2014-07-02 | 2016-01-07 | Pierburg Gmbh | Regelventil zum Anbau an einen Kfz-Motor |
| CN106795835B (zh) * | 2015-09-11 | 2019-01-04 | 株式会社小松制作所 | 排气再循环阀、排气再循环阀的解冻系统以及发动机 |
| US9926891B2 (en) * | 2015-11-18 | 2018-03-27 | General Electric Company | System and method of exhaust gas recirculation |
-
2017
- 2017-12-20 DE DE102017130673.0A patent/DE102017130673A1/de not_active Withdrawn
-
2018
- 2018-12-13 EP EP18826997.1A patent/EP3728822A1/de not_active Withdrawn
- 2018-12-13 CN CN201880080901.2A patent/CN111492135B/zh not_active Expired - Fee Related
- 2018-12-13 WO PCT/EP2018/084681 patent/WO2019121284A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017130673A1 (de) | 2019-06-27 |
| CN111492135A (zh) | 2020-08-04 |
| CN111492135B (zh) | 2022-06-28 |
| WO2019121284A1 (de) | 2019-06-27 |
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