• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for detecting the amount of gas (m) which is supplied by means of a gas supply device (4) to an antechamber (3) of an internal combustion engine (1), whereby a targeted disturbance (Δu) of the amount of gas (m) supplied by means of the gas supply device (4) is undertaken and a change (ΔT) resulting from the targeted disturbance (Δu) of an exhaust gas temperature (T) of an exhaust gas formed in a combustion chamber (2) connected to the prechamber (3) is measured, whereby by comparison with a desired value of the change (ΔTSoll) the exhaust gas temperature (T) on the means of the gas supply means (4) supplied gas quantity (m) is inferred.
    公开号:AT518584A1
    申请号:T50434/2016
    申请日:2016-05-11
    公开日:2017-11-15
    发明作者:Gruber Friedrich；Huber Johannes
    申请人:Ge Jenbacher Gmbh & Co Og；
    IPC主号:
    专利说明:

    The present invention relates to a method for detecting the amount of gas which is supplied by means of a gas supply to an antechamber of an internal combustion engine having the features of the preamble of claim 1, a method for detecting the amount of gas which is supplied to at least two antechambers of an internal combustion engine by means of associated gas supply means with the Features of the preamble of claim 4, a method for equalizing the amount of gas which is supplied to at least two antechambers of an internal combustion engine by means of associated gas supply means having the features of the preamble of claim 5 and internal combustion engines having the features of the preamble of claim 9 or 10.
    In the prior art, it is not directly measured which gas quantity is supplied by means of a gas supply device to an antechamber of an internal combustion engine. The monitoring of a functional state of the gas supply means of an individual pre-chamber is therefore not possible. The same problem arises when an equalization of the amount of gas which is supplied to at least two antechambers of an internal combustion engine by means of associated gas supply means to be made.
    The object of the invention is to provide generic methods and internal combustion engines with which the functional state of the gas supply device of an individual pre-chamber can be checked without direct measurement of the gas quantity and / or an equalization of different prechambers can take place.
    This object is achieved by methods having the features of claim 1, 4 or 5 and internal combustion engines having the features of claim 9 or 10. Advantageous embodiments of the invention are defined in the dependent claims.
    In the invention, in a first variant, a comparison of the resulting by the targeted disturbance change in the exhaust gas temperature in one with the
    Prechamber associated combustion chamber resulting exhaust gas with a target value of the change in exhaust gas temperature. By comparing only changes, it is not necessary to know an absolute value of the gas quantity or the exhaust gas temperature. Although the amount of gas supplied via the gas supply means (s) is not measured directly, the invention permits indirect determination of this amount of gas when it is known from a theoretical model or from measurements as to how the exhaust gas temperature is related to the amount of gas. In this case, of course, it is also known how a change in the exhaust gas temperature is related to a change in the amount of gas (by differentiating the exhaust gas temperature as a function of the amount of gas). It can thus be searched in the known context that change in the exhaust gas temperature, which coincides with the measured change. But then it is also known (via the analytically or graphically determined inverse function) at which functional value of the function of the exhaust gas temperature - d. H. at which gas quantity -this change occurs.
    If the gas supply device is actively designed in the sense that it can be selectively controlled by the controller (eg active pre-chamber gas valve), a correction of the supplied gas quantity may be carried out if there is a detected deviation, eg. B. by a change of an opening duration and / or an opening time of the pre-chamber gas valve is carried out by the controller.
    It is preferably provided that, taking into account the change in the gas quantity resulting from the targeted disturbance, a gradient of the exhaust gas temperature with respect to the gas quantity is calculated. Then, for inferring the amount of gas supplied by means of the gas supply device, the calculated gradient can be compared with a desired value of the gradient. For the detection of the amount of gas, which is supplied to at least two chambers of an internal combustion engine by means of associated gas supply means and a possible equality, it is sufficient if in a second variant of the invention, resulting from the disturbances changes of the exhaust gas temperatures of the various combustion chambers are compared. Then, a control of at least one of the at least two prechambers can take place such that a possible difference between the changes in the exhaust gas temperatures disappears. A difference equal to zero means that the gas quantities are equal. The determination of the gas supplied to the individual pre-chambers by the respective gas supply means is therefore not necessary, but can be carried out.
    Of course, as described above, a comparison of the change in the exhaust gas temperature in response to a fault with a desired value could be carried out individually for each pre-chamber and then the gas quantities indirectly determined in this way and adjusted via the respective gas supply means can be matched by the controller.
    Is or are the gas supply (s) formed as connected to a pre-chamber gas (r) channel or channels, the targeted interference - preferably individually for each gas supply - supplied by changing a gas pressure in the pre-chamber gas line and / or by changing one of the pre-chamber gas line Amount of air done.
    If the gas supply device (s) is / are formed as active pre-chamber gas valve (s) connected to a prechamber gas line, the targeted disturbance can be effected by changing an opening duration and / or an opening time of the prechamber gas valve (s).
    It is preferably provided that the targeted disturbance in the direction of a reduced amount of gas is made. Regardless of the selected direction of the disturbance, this should ideally be chosen so small that the operation of the internal combustion engine is not disturbed appreciably.
    All of the above-described methods may be performed during assembly or maintenance of an internal combustion engine. Preferably, however, it is provided that a control of the internal combustion engine control is designed to - make a targeted disturbance of the supplied gas supply means by the gas supply and - measure by means of the temperature sensor resulting from the targeted disturbance change in the exhaust gas temperature and - by comparison with a deposited Set value of the change in the exhaust gas temperature on the gas supplied by the gas supply means back and / or - make for each of the at least two antechambers a targeted disturbance of the gas supply means supplied by the respective gas supply and - by means of the associated temperature sensor resulting from the targeted disturbance change in the exhaust gas temperature to measure the respective combustion chamber and - to determine a difference by comparing the resulting changes in exhaust gas temperatures and possibly - a control of at least one of the at least two prechambers such make the difference disappear.
    Then, the methods described above may be performed automatically during operation of the internal combustion engine after initiation by an operator or according to a predetermined maintenance plan. If the functional state of a gas supply device is questionable, a corresponding message can be sent. Equalization of the gas quantities for all prechambers or combustion chambers of the internal combustion engine can take place automatically.
    The invention can be used preferably in a stationary internal combustion engine, for marine applications or mobile applications such as so-called "Non-Road Mobile Machinery" (NRMM). The internal combustion engine can serve as a mechanical drive, z. B. to operate compressor systems or coupled with a generator to a gene set for generating electrical energy.
    Embodiment 4m of the invention will be discussed with reference to the figures. Show it:
    Fig. 1 shows schematically an internal combustion engine according to the invention. Fig. 2 shows schematically another internal combustion engine according to the invention. Fig. 3 shows a change in the exhaust gas temperature when carrying out a targeted disturbance
    Fig. 4 relationship between Abgastemperafur and Gasmange
    FIG. 1 shows an internal combustion engine 1 with a plurality of combustion lumens 2 which are each connected to an antechamber 3. Each pre-chamber has a gas supply means 4 formed therein in the form of sccmatic vaporizing gas streams B connected to a prechamber gas line 7. A controller S (which will normally be formed in an engine control unit of the internal combustion engine) controls the gas supply to the antechambers. For each cylinder 2, there is a temperature sensor 6 for measuring an exhaust gas temperature T of an exhaust gas formed in the combustion chamber 2, the temperature sensors 6 being in control 5 are connected.
    The control unit 5 is designed to carry out a targeted disturbance Δη of the gas quantity m supplied to the individual prechambers 3 by means of the gas supply units 4 (eg by slightly changing the pressure in the prechamber gas line 7 or changing an opening duration and / or an opening time) Vorkammergasventile 8) and by means of the temperature sensors 6 to measure by the targeted disturbance Au for each combustion chamber 2 resulting change ΔΤ the exhaust gas temperature T. By comparison with a stored Sollwerl the change ΔΤ $ 0 »the exhaust gas temperature T, the controller 5 on the by means of the respective Gaszufuhrelnrlehtung 4 supplied amount of gas m infer.
    It could alternatively or additionally be provided that the controller 5 is designed to determine a difference by comparing the resulting changes .DELTA.Τ the exhaust gas temperatures T and to make a control of at least one of the antechambers 3 such that the difference disappears.
    If the internal combustion engine has a common prechamber gas line 7 and passive gas valves which connect the individual prechambers 3 to the common prechamber gas line 7, the targeted disturbance Au can only be made globally (ie equal to all prechambers 3). In this case, after a detected deviation in the supplied gas amount no individual control can be made in order to achieve equality, but it would be necessary to replace the affected passive gas valve. If active prechamber gas valves are provided, equality can also be achieved in the case of a common prechamber gas line 7 by individual control of at least one of the gas valves.
    2 shows an internal combustion engine 1, which differs from that of FIG. 1 only in that here the gas supply means 4 are formed as closed with a check valve, connected to a pre-chamber gas line 7 channels. The controller 5 may vary the pressure in the prechamber gas line 7 via actuators, not shown.
    FIG. 3 shows a change in the exhaust gas temperature T0 resulting in a targeted disturbance Aui (here in the direction of a smaller amount of gas m) which existed before the disturbance Aui, to a value T-1 which results due to the disturbance Aui, so that the Fault Aui is associated with a change in the exhaust gas temperature ΔΤ.
    In Fig. 4 is a schematically determined by measurements relationship between the exhaust gas temperature T of an associated with the pre-chamber 3 combustion chamber 2 exhaust gas and the amount of gas m, which is supplied by the gas supply means 4 of the prechamber 3, shown.
    The tangent present at a point m with a slope corresponding to the gradient dT / dm can be approximated by the secant drawn with the slope g-1 = (T0-Ti) / (m0-m-1). If one knows the change in the exhaust gas temperature ΔΤ resulting from the fault Aui, then one can calculate the quotient AT / Aui and determine at which point m0 an identical slope or an identical gradient exists. This point m0 corresponds to the amount of gas m, which is supplied by means of the gas supply means 4 of the prechamber 3 of the internal combustion engine 1.
    权利要求:
    Claims (13)
    [1]
    claims:
    1. A method for detecting the amount of gas (m), which by means of a gas supply means (4) an antechamber (3) of an internal combustion engine (1) is supplied, characterized in that a targeted disturbance (Au) of the gas supply means (4) supplied amount of gas (m) is carried out and a by the targeted disturbance (Au) resulting change (ΔΤ) of an exhaust gas temperature (T) of an exhaust chamber formed in a with the antechamber (3) combustion chamber (2) is measured, wherein by comparison with a setpoint the change (ATSoii) of the exhaust gas temperature (T) on the by means of the gas supply means (4) supplied gas quantity (m) is inferred.
    [2]
    2. Method according to the preceding claim, wherein, taking into account the change (Am) of the gas quantity (m) resulting from the targeted disturbance (Au), a gradient (dT / dm) of the exhaust gas temperature (T) with respect to the gas quantity (m) is calculated becomes.
    [3]
    3. The method according to the preceding claim, wherein for the conclusion of the gas supply means (4) supplied amount of gas (m) of the calculated gradient (dT / dm) is compared with a target value of the gradient (dT / dmSoii).
    [4]
    4. A method for detecting the amount of gas (m), which at least two pre-chambers (3) of an internal combustion engine (1) by means of associated gas supply means (4) is supplied, characterized in that a targeted disturbance (Au) of the supplied gas quantity (m) is made and individually for the combustion chambers (2) connected to the at least two prechambers (3), a change (ΔΤ) of an exhaust gas temperature (T) resulting from the targeted disturbance (Au) is measured, whereby the resulting changes (ΔΤ ) of the exhaust gas temperatures (T) on a difference between the means of the different gas supply means (4) supplied gas quantities (m) is inferred.
    [5]
    5. A method for equalizing the amount of gas (m), which at least two pre-chambers (3) of an internal combustion engine (1) by means of associated gas supply means (4) is supplied, characterized in that for each of the at least two pre-chambers (3) a targeted fault (Au ) of the gas supplied by means of the respective gas supply means (4) (m) is made and individually for with the at least two atria (3) connected combustion chambers (2) by the targeted disturbance (Au) resulting change (ΔΤ) an exhaust gas temperature (T ) of a resulting exhaust gas is measured, wherein a difference is determined by comparison of the resulting changes (ΔΤ) of the exhaust gas temperatures (T) and a control of at least one of the at least two pre-chambers (3) takes place such that the difference disappears.
    [6]
    6. The method according to at least one of the preceding claims, wherein the gas supply means (s) (4) connected to a Vorkammergasleitung (7) (r) channel or channels is or are and the targeted interference (Au) - preferably individually for each gas supply device (4) - is made by changing a gas pressure in the pre-chamber gas line (7) and / or by changing one of the pre-chamber gas line (7) supplied amount of air.
    [7]
    7. The method according to at least one of claims 1 to 4, wherein the gas supply means (s) (4) connected to a pre-chamber gas line (s) (s) active (s) Vorkammergasventil (s) (8) is formed and / or targeted disturbance (Au) by changing an opening period and / or an opening time of the or the pre-chamber gas valve (s) (8) is made.
    [8]
    8. The method according to at least one of the preceding claims, wherein the targeted disturbance (Au) in the direction of a reduced amount of gas (m) is made.
    [9]
    9. internal combustion engine (1) with: - at least one combustion chamber (2) - one with the at least one combustion chamber (2) connected prechamber (3) - a gas supply means (4) for the prechamber (3) - a controller (5) for control the gas supply device (4), - a temperature sensor (6) associated with the at least one combustion chamber (2) for measuring an exhaust gas temperature (T) of an exhaust gas formed in the at least one combustion chamber (2), the temperature sensor (6) being connected to the control (5) is connected characterized in that the controller (5) is adapted to - make a targeted disturbance (Au) of the gas supply means (4) supplied amount of gas (m) and - by means of the temperature sensor (6) through the targeted fault ( Au) resulting change (ΔΤ) of the exhaust gas temperature (T) to measure and - by comparison with a stored setpoint of the change (ATSoii) the exhaust gas temperature (T) on the means of the gas supply means (4) supplied amount of gas (m) back close.
    [10]
    10. internal combustion engine (1) with: - at least two combustion chambers (2) - at least two prechambers (3) which are each connected to one of the at least two combustion chambers (2) - a gas supply means (4) for each of the at least two pre-chambers (3 ) - a control (5) for controlling the gas supply means (4), - at least two temperature sensors (6) which are each associated with one of the at least two combustion chambers (2), for measuring an exhaust gas temperature (T) of a combustion chamber (2) resulting exhaust gas, each temperature sensor (6) to the controller (5) is characterized in that the controller (5) is adapted to - for each of the at least two atria (3) a targeted disturbance (Au) by means of the respective Make gas supply (4) supplied amount of gas (m) and - by means of the associated temperature sensor (6) by the targeted disturbance (Au) resulting change (ΔΤ) of the exhaust gas temperature (T) of the respective Brennra To measure (2) and - determine a difference by comparing the resulting changes (ΔΤ) of the exhaust gas temperatures (T).
    [11]
    11. Internal combustion engine (1) according to the preceding claim, wherein the controller (5) is adapted to perform a control of at least one of the at least two atria (3) such that the difference disappears.
    [12]
    12. internal combustion engine (1) according to at least one of claims 9 to 11, wherein the gas supply means (s) (4) is designed as a pre-chamber gas line (7) and the controller (5) is adapted to the targeted interference (Au) by changing a gas pressure in the pre-chamber gas line (7) and / or by changing one of the pre-chamber gas line (7) supplied amount of air.
    [13]
    13. Internal combustion engine (1) according to at least one of claims 9 to 11, wherein the gas supply means (s) (4) as active (s) pre-chamber gas valve (s) (8) is or are and the controller (5) is designed to perform the targeted disturbance (Au) by changing an opening duration and / or an opening time of the prechamber gas valve (s) (8).
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    同族专利:
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    AT518584B1|2018-02-15|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50434/2016A|AT518584B1|2016-05-11|2016-05-11|Method for detecting the amount of gas|ATA50434/2016A| AT518584B1|2016-05-11|2016-05-11|Method for detecting the amount of gas|
    US16/097,768| US10641196B2|2016-05-11|2017-05-11|Method for detecting a gas amount|
    EP17722790.7A| EP3455479B1|2016-05-11|2017-05-11|Method for detecting a gas amount|
    CA3022815A| CA3022815A1|2016-05-11|2017-05-11|Method for detecting a gas amount|
    PCT/EP2017/061292| WO2017194658A1|2016-05-11|2017-05-11|Method for detecting a gas amount|
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