EP4499998A1 - Steuervorrichtung für eine dual-fuel-brennkraftmaschine - Google Patents
Steuervorrichtung für eine dual-fuel-brennkraftmaschineInfo
- Publication number
- EP4499998A1 EP4499998A1 EP23716442.1A EP23716442A EP4499998A1 EP 4499998 A1 EP4499998 A1 EP 4499998A1 EP 23716442 A EP23716442 A EP 23716442A EP 4499998 A1 EP4499998 A1 EP 4499998A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- control device
- dual
- mode
- mono
- 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- Withdrawn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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
- F02D19/105—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2422—Selective use of one or more tables
Definitions
- the invention relates to a control device for a dual-fuel internal combustion engine, a method for controlling a dual-fuel internal combustion engine, which is carried out by the control device, and a vehicle, in particular a watercraft, or a stationary application comprising a dual-fuel Internal combustion engine and the control device.
- Diesel engines are widely used in shipping due to their operational safety and the high energy content of diesel fuel.
- Fossil fuels in the shipping sector can hardly be replaced with electric drives.
- the amounts of energy required are usually too high and the energy storage densities are too low.
- Pure hydrogen-based solutions e.g. B. fuel cells or combustion engines are seen as disruptive in the traditional shipping sector because there is a lack of long-term experience.
- the lack of hydrogen infrastructure also creates high risks for the operation of pure hydrogen drives in ships.
- Another problem is the greater space and weight requirement of the tank systems for hydrogen as an energy source compared to the common diesel fuel. This means that only smaller amounts of hydrogen can be stored on board. As a result, the duration of the operation is inevitably limited. For example, in the event of unplanned changes in the operational profile (e.g. extreme weather conditions, route changes, relief operations such as firefighting or rescue) this could have fatal consequences and lead to the fuel being used up and thus the failure of all drives.
- Dual-fuel internal combustion engines are known as an “intermediate solution”, in which part of the liquid fuel, usually diesel, is replaced by a gaseous fuel such as hydrogen is substituted.
- a gaseous fuel such as hydrogen
- dual-fuel internal combustion engines can be operated exclusively with liquid fuel.
- the dual-fuel internal combustion engines therefore offer the possibility of sizing large, expensive and heavy hydrogen tanks to a size that is required in normal conditions.
- Fuel reserves can be stored to the usual extent in the form of diesel. Both in the event of errors and when hydrogen is used up, the full drive power is still available in pure and tested diesel operation.
- a control device for a dual-fuel internal combustion engine which, in particular optionally, operates in a mono-fuel mode with a liquid fuel, preferably a diesel fuel, or in a dual-fuel mode dus is operable with the liquid fuel and a gaseous fuel, preferably a hydrogen fuel, provided.
- the control device comprises a liquid fuel control device for regulating and/or controlling a dosage of the liquid fuel in mono-fuel mode or dual-fuel mode, and a gas fuel control device for regulating and/or controlling a dosage of the gaseous fuel in dual-fuel mode. Fuel mode.
- the liquid fuel control device is designed to check repeatedly, in particular continuously, whether at least one switching condition for switching between the mono-fuel mode and the dual-fuel mode is met. It is also possible that the liquid fuel control device is preferably further designed, e.g. B. to initiate the switchover when the at least one switchover condition is met.
- the liquid fuel control unit and the gas fuel control unit are expediently connected via a communication connection, e.g. B. a CAN bus (“Controller Area Network” bus), connected to each other for signaling purposes.
- a communication connection e.g. B. a CAN bus (“Controller Area Network” bus)
- the liquid fuel control device and the gas fuel control device are designed to communicate with one another via the communication connection and/or to coordinate a switchover between the mono-fuel mode and the dual-fuel mode.
- a switch from the mono-fuel mode to the dual-fuel mode involves activating a metering of the gaseous fuel (e.g. directly or indirectly into a combustion chamber of the dual-fuel internal combustion engine).
- Switching from dual-fuel mode to mono-fuel mode involves deactivating the metering of the gaseous fuel. Activation and deactivation can conveniently be controlled by the gas fuel control unit.
- a (usual) introduction of the liquid fuel (into the combustion chamber of the dual-fuel internal combustion engine) expediently takes place in dual-fuel mode and in mono-fuel mode.
- control device or “control device” can usefully refer to electronics (e.g. with microprocessor(s) and data memory) which, depending on its training, can take on control tasks and/or regulation tasks and/or processing tasks. Even if the term “controls” is used here, it can also appropriately include or mean “rules” or “controls with feedback” and/or “processing”.
- the present disclosure thus provides a control device for a dual-fuel internal combustion engine, which ensures a high level of operational reliability of the dual-fuel internal combustion engine.
- the switchover between the two modes of the dual-fuel internal combustion engine only occurs when certain conditions are met, with the liquid fuel control unit acting as a master control unit. Safety-critical conditions caused by unwanted switching can be prevented in this way.
- the control device thus includes safety logic that can react to possible irregularities and can therefore regulate and control operation in one of the two modes or a switchover between the two modes. In this way, the highest possible operational reliability can be guaranteed, in particular an operational reliability that is essentially also present in conventional internal combustion engines that are designed exclusively for operation with liquid fuel.
- the advantages of the known technology for liquid fuels, e.g. B. diesel technology can be combined with dual fuel technology, which leads to significantly reduced CCh emissions.
- a technology is provided with which a known internal combustion engine, which is designed only for operation with a liquid fuel, can be converted into a dual-fuel internal combustion engine with few modifications.
- the existing (liquid fuel) control unit of the internal combustion engine e.g. B. using at least one adapted data set, whereby only an additional control device, namely the gas fuel control device, is necessary to provide operation in dual-fuel mode.
- the existing control system can only be expanded and does not have to be completely replaced for operation in dual-fuel mode.
- the liquid fuel control device can in particular be an electronic engine control unit (ECU).
- the liquid fuel control device can (by default) be permanently active (i.e. permanently in operation) during operation of the dual-fuel internal combustion engine.
- a control unit can therefore advantageously be installed that is intended for conventional internal combustion engines that are designed only for operation with liquid fuel, with an adapted data set being used.
- the adapted data set enables the internal combustion engine to be operated as usual in mono-fuel mode with an unchanged application.
- the internal combustion engine can also be operated in the dual-fuel mode, with the liquid fuel control device being used both to initiate a switch between the two modes and to monitor or control relevant conditions and parameters that allow the internal combustion engine to operate in one of the two Modes enable is trained.
- the dual-fuel internal combustion engine can, preferably always, be started in mono-fuel mode.
- the liquid fuel control unit can then check, preferably in addition to the self-diagnosis of the liquid fuel control unit, whether the at least one switching condition for switching from mono-fuel mode to dual-fuel mode is fulfilled (and thus metering of the gaseous fuel is permitted ).
- the at least one switching condition for switching from the mono-fuel mode to the dual-fuel mode can be a threshold value exceeding and/or a threshold value falling below the threshold value of at least one predetermined threshold value of at least one physical quantity of the dual-fuel internal combustion engine, preferably a pressure and/or a temperature, error-free operation of the liquid fuel control device and / or error-free operation of the gas fuel control device.
- the control device can therefore check conditions and initiate metering of the gaseous fuel by switching to the dual-fuel mode only when the checked conditions are met and thus the operational safety of the dual-fuel internal combustion engine can be ensured.
- a switch from mono-fuel mode to dual-fuel mode can be initiated by the following sequence if the at least one switching condition (for switching from mono-fuel mode to dual-fuel mode) is met: a) sending a release message by the liquid fuel control device to the gas fuel control device that can be switched to the dual fuel mode, and / or b) sending a request message, preferably in response to the release message, by the gas fuel control device the liquid fuel control device to request a switch from the mono-fuel mode to the dual-fuel mode, and / or c) sending a feedback message, preferably in response to the request message, by the liquid fuel control device to the gas fuel control device, that a switch from mono-fuel mode to dual-fuel mode is initiated.
- the specified sequence and the associated coordination between the two control devices prevent safety-critical states due to an unwanted switching of the operating mode or a switching at a time when operational safety cannot be guaranteed.
- the liquid fuel control device can be designed to carry out a check of a data content of the request message using a checksum check for integrity and using a rolling counter for timeliness, and to send the feedback message if the check is successful. These safety precautions can further increase operational safety in order to prevent miscommunication between the two control devices.
- the liquid fuel control device can also be designed to only send the feedback message (and thus only implement the request to switch to dual-fuel mode) if the at least one switching condition for switching from mono-fuel mode to dual -Fuel mode is met. Otherwise the request may be discarded.
- the feedback message can further include (i.e. a content of the feedback message can include) that the switchover from mono-fuel mode to dual-fuel mode takes place, at least one (combustion-relevant) parameter for a liquid fuel metering device for the dual-fuel Mode is set and / or a metering of the gaseous fuel is to be carried out by the gas fuel control unit.
- the gas fuel control device can be designed to check at least one gas fuel-specific switching condition and/or a content of the release message and to send the request message if the at least one gas fuel-specific switching condition is fulfilled and/or at least the content of the release message meets a specified criterion.
- operational safety can be increased even further, with the gas fuel control unit being given the task of checking the gaseous fuel or components that are provided for guiding and/or metering the gaseous fuel.
- the gas fuel control unit can therefore check components and/or functions that are not present in a conventional internal combustion engine and are therefore usually not taken into account by the liquid fuel control unit.
- Switching from mono-fuel mode to dual-fuel mode can be done with a shake hand.
- the liquid fuel control device and/or the gas fuel control device may be designed to initiate a switch from dual-fuel mode to mono-fuel mode (or to remain in mono-fuel mode) if and/or or as soon as at least one of the following switching conditions (for switching from dual-fuel mode to mono-fuel mode) exists: a faulty and/or interrupted communication connection between the liquid fuel control unit and the gas fuel control unit, incorrect operation of the liquid fuel control unit, e.g. B. a faulty liquid fuel control unit sensor, incorrect operation of the gas fuel control unit, e.g. B.
- a faulty sensor of the gas fuel control unit a limit violation of at least one predetermined limit value of at least one physical quantity of the dual-fuel internal combustion engine, preferably a pressure and / or a temperature, e.g. B. a boost pressure of a charge air below a predetermined limit boost pressure and / or a pressure in a gas fuel metering device outside a predetermined pressure range, an insufficient amount of gaseous fuel in a gas fuel tank, a leak through which the gaseous fuel escapes , and/or a faulty sensor system for detecting a leak through which the gaseous fuel escapes.
- a pressure and / or a temperature e.g. B. a boost pressure of a charge air below a predetermined limit boost pressure and / or a pressure in a gas fuel metering device outside a predetermined pressure range, an insufficient amount of gaseous fuel in a gas fuel tank, a leak through which the gaseous fuel escapes , and/or a faulty sensor system for
- the switching conditions, e.g. B. the limit value violation can each be monitored by a suitable sensor device, which is connected to the control device, in particular to the liquid fuel control device and / or the gas fuel control device, in terms of signals.
- the switch from dual-fuel mode to mono-fuel mode can occur (essentially immediately) and/or can be initiated as soon as one of the switching conditions (for a switch from dual-fuel mode to mono-fuel mode) dus) is present and/or as soon as the liquid fuel control unit and/or the gas fuel control unit signals the switchover and/or the existence of one of the switchover conditions.
- the switch from dual-fuel mode to mono-fuel mode can be initiated by: a) withdrawing at least one of the release message, the request message and/or the feedback message, preferably directly and/or without another message, b) one same sequence as the sequence for switching from mono-fuel mode to dual-fuel mode, and/or c) a withdrawal of the release message, the request message and the feedback message in a different sequence to the sequence for switching from mono-fuel mode to dual-fuel mode.
- the control device can be connected via signaling to a display device for warning that at least one switching condition exists.
- the dual-fuel internal combustion engine can be operated in a speed-controlled manner in mono-fuel mode and in dual-fuel mode.
- a speed and/or a torque of the dual-fuel internal combustion engine can be regulated and/or controllable by the liquid fuel control unit in the mono-fuel mode and in the dual-fuel mode.
- the control of the speed and/or the torque can e.g. B. by the metered (and preferably injected) amount of liquid fuel.
- the liquid fuel control device can be designed to provide a target torque for, in particular optionally, operating the dual-fuel internal combustion engine in mono-fuel mode and in dual-fuel mode for a predetermined (and/or received) target speed and / or to determine a predetermined (and/or received) pedal value (of a pedal and/or a control computer of a vehicle driven by the dual-fuel internal combustion engine, preferably a watercraft, or a stationary application), e.g. B. to calculate. Because the liquid fuel control unit has the tasks of speed monitoring or control and determining a target torque in both modes, an existing safety concept of the liquid fuel control unit for continuous speed monitoring can advantageously remain in place.
- the liquid fuel control device can be designed to receive the predetermined target speed from an external (marine) electronic system and / or a control computer, e.g. B. via the CAN bus and/or a 4-20 mA input.
- the specified target speed and/or a target torque can, for. B. by a user via an input device, e.g. B. a drive lever or a pedal and / or an input and display device of the control computer can be requested.
- the liquid fuel control device can be designed to provide a target torque and/or the predetermined pedal value, e.g. B. a relative pedal value between 0% and 100%, received from the external (marine) electronic system and/or the command computer.
- the liquid fuel control device can further be designed to determine the target torque depending on the received pedal value.
- the liquid fuel control device can be connected via signaling to a liquid fuel metering device of the dual-fuel internal combustion engine, preferably a common rail injection system, for metering the liquid fuel.
- the liquid fuel metering device can have nozzles and/or injectors for metering and preferably injecting the liquid fuel, in particular into a combustion chamber of the dual-fuel internal combustion engine.
- the nozzles and/or injectors of the liquid fuel metering device can be controllable (directly or indirectly) by the liquid fuel control unit.
- the gas fuel control unit can be connected in terms of signals to a gas fuel metering device of the dual-fuel internal combustion engine for metering the gaseous fuel.
- the gas fuel metering device can have nozzles and/or injectors for metering and preferably injecting the gaseous fuel, in particular directly or indirectly into a combustion chamber of the dual-fuel internal combustion engine.
- the nozzles and/or injectors of the gas fuel metering device can be regulated and/or controllable (directly or indirectly) by the gas fuel control device.
- the gas fuel control device can be designed to activate the gas fuel metering device, in particular the nozzles and/or injectors, when switching from mono-fuel mode to dual-fuel mode (and to leave it activated in dual-fuel mode ).
- the gas fuel control device can further be designed to deactivate the gas fuel metering device, in particular the nozzles and / or injectors, when switching from dual fuel mode to mono fuel mode (and deactivated in mono fuel mode let).
- the liquid fuel control device can be designed to regulate and/or control at least one parameter of the liquid fuel metering device.
- the at least one parameter can preferably include at least a dosing start time, a dosing duration, a dosing pressure, a dosing number and/or a dosing quantity of the liquid fuel to be dosed.
- the at least one parameter can thus be set as optimally as possible in accordance with, among other things, the desired speed and/or the desired torque and the mode of the dual-fuel internal combustion engine.
- the gas fuel control device can be designed to regulate and/or control at least one parameter of the gas fuel metering device.
- the at least one parameter can preferably include at least a dosing start time, a dosing duration, a dosing pressure, a dosing number and/or a dosing quantity of the gaseous fuel to be dosed.
- the at least one parameter can be set as optimally as possible in accordance with, among other things, the desired speed and/or the desired torque.
- At least one (combustion-relevant) parameter of the liquid fuel metering device can be dependent on at least one stored map, preferably dependent on an engine operating point of the dual-fuel internal combustion engine, and preferably an actual speed, an actual torque and/or an actual -Dosing quantity can be determined, regulated and/or controlled by the liquid fuel control unit.
- the at least one map can z. B. be stored in a memory of the liquid fuel control unit.
- the at least one stored map can include at least one map for the mono-fuel mode and at least one map for the dual-fuel mode. Specific settings of the at least one parameter can therefore advantageously be stored for both modes. This means that you can either operate in mono-fuel mode or dual-fuel mode with e.g. B. essentially identical performance of the dual-fuel internal combustion engine can be provided while ensuring operational safety.
- the liquid fuel control device can be designed to regulate and/or control the at least one parameter of the liquid fuel metering device in order to ensure heat release of the metered, gaseous fuel during combustion of the metered, liquid fuel and the metered, gaseous fuel Achievement of a predetermined target speed and / or a predetermined torque in dual-fuel mode to increase or limit, preferably that during combustion a lower amount of nitrogen oxide, NO X , is produced than in mono-fuel mode and / or a knocking combustion is avoided.
- the gas fuel control device can be designed to regulate and/or control the at least one parameter of the gas fuel metering device in dual-fuel mode as a function of an engine operating point of the dual-fuel internal combustion engine.
- the gas fuel control device can further be designed to receive at least one message, which includes the engine operating point, from the liquid fuel control device.
- the at least one parameter of the gas fuel metering device can depend on stored data, e.g. B. at least one stored gas fuel map, and the engine operating point of the dual-fuel internal combustion engine can be determined, regulated and / or controlled by the gas fuel control unit.
- the stored data can e.g. B. be stored in a memory of the gas fuel control unit.
- the at least one parameter of the gas fuel metering device can thus be set as optimally as possible in accordance with the engine operating point.
- control device can further be designed to detect a leak through which the gaseous fuel escapes.
- the control device can be connected to a sensor system for detecting the leak in terms of signals.
- a leak can be detectable if a detected leakage gas mass flow, in particular during operation of the dual-fuel internal combustion engine, is above a predetermined threshold.
- the predetermined threshold can e.g. B. between 40 g / min and 60 g / min, preferably 48 g / min, and preferably only about half as high be in known automotive standards.
- the sensor system therefore advantageously detects a leak much earlier than a sensor system, e.g. B. a hydrogen sensor, in a machine room in which the dual-fuel internal combustion engine is arranged, because engine room ventilation required for regular operation would immediately dilute the small amount of hydrogen below a flammable concentration.
- the detection of a leak can be carried out for the dual-fuel internal combustion engine during operation (dynamic leakage test) and when the dual-fuel internal combustion engine is switched off (static leakage test).
- a vehicle in particular a watercraft, or a stationary application, comprising a dual-fuel internal combustion engine which, in particular optionally, operates in a mono-fuel mode with a liquid fuel, preferably a diesel fuel, or operable in a dual fuel mode with the liquid fuel and a gaseous fuel, preferably a hydrogen fuel, and a control device as disclosed herein.
- a liquid fuel preferably a diesel fuel
- a gaseous fuel preferably a hydrogen fuel
- Figure 1 shows schematically the control device 100 for a dual-fuel internal combustion engine, which, in particular optionally, is in a mono-fuel mode with a liquid fuel. preferably a diesel fuel, or in a dual fuel mode with the liquid fuel and a gaseous fuel, preferably a hydrogen fuel.
- a liquid fuel preferably a diesel fuel
- a gaseous fuel preferably a hydrogen fuel.
- the control device 100 includes a liquid fuel control device 10 for regulating and/or controlling a dosage of the liquid fuel in mono-fuel mode or dual-fuel mode, and a gas fuel control device 20 for regulating and/or controlling a dosage of the gaseous fuel in dual fuel mode.
- the liquid fuel control device 10 is designed to repeatedly check whether at least one switching condition for switching between the mono-fuel mode and the dual-fuel mode is met, and preferably to initiate the switch if the at least one switching condition is fulfilled.
- a switch from the mono-fuel mode to the dual-fuel mode involves activating a metering of the gaseous fuel (e.g. directly or indirectly into a combustion chamber of the dual-fuel internal combustion engine).
- Switching from dual-fuel mode to mono-fuel mode involves deactivating the metering of the gaseous fuel.
- the activation and deactivation can expediently be regulated and/or controlled by the gas fuel control device 20.
- the liquid fuel control unit 10 and the gas fuel control unit 20 are connected via a communication link, e.g. B. a CAN bus 4, connected to each other for signaling purposes.
- the liquid fuel control device 10 can comprise a communication interface 11 and the gas fuel control device 20 can have a communication interface 21, with the communication interface 11 and the communication interface 21 communicating with one another via the communication connection.
- the liquid fuel control device 10 can be connected via signaling to a liquid fuel metering device 17 of the dual-fuel internal combustion engine, preferably a common rail injection system, for metering the liquid fuel.
- the liquid fuel metering device 17 may have nozzles and/or injectors for metering and preferably injecting the liquid fuel.
- the nozzles and/or injectors of the liquid fuel metering device 17 can be regulated and/or controlled by the liquid fuel control device 10.
- the liquid fuel control device 10 can be designed to regulate and/or control at least one parameter of the liquid fuel metering device 17.
- the at least one parameter can include at least a dosing start time, a dosing duration, a dosing pressure, a dosing number and/or a dosing quantity of the liquid fuel to be dosed.
- the gas fuel control device 20 can be connected in terms of signals to a gas fuel metering device 24 of the dual-fuel internal combustion engine for metering the gaseous fuel.
- the gas fuel metering device 24 may have nozzles and/or injectors for metering and preferably injecting the gaseous fuel.
- the nozzles and/or injectors of the gas fuel metering device 24 can be regulated and/or controlled by the gas fuel control device 20.
- the liquid fuel metering device 17 and/or the gas fuel metering device 24 can each also be referred to as a final stage.
- the gas fuel control device 20 can be designed to regulate and/or control at least one parameter of the gas fuel metering device 24.
- the at least one parameter can include at least a dosing start time, a dosing duration, a dosing pressure, a dosing number and/or a dosing quantity of the gaseous fuel to be dosed.
- the at least one parameter of the liquid fuel metering device 17 can depend on at least one stored map, preferably dependent on an engine operating point of the dual-fuel internal combustion engine, and preferably an actual speed, an actual torque and/or an actual metering quantity Liquid fuel control device 10 can be determined, regulated and / or controlled.
- the liquid fuel control device 10 can be designed to determine the target torque for operating the dual-fuel internal combustion engine in mono-fuel mode and in dual-fuel mode for a predetermined target speed and/or a predetermined pedal value.
- the specified target speed can e.g. B. from an external (marine) electronic system and / or a control computer 3 via the CAN bus and / or a 4-20 mA input by the liquid fuel control device 10 via its communication interface 11.
- the liquid fuel control device 10 may further include a speed controller module 12.
- the speed controller module 12 can determine, in particular calculate, the necessary torque in order to operate the dual-fuel internal combustion engine at the desired speed.
- the liquid fuel control device 10 can be designed to provide a predetermined target torque and/or the pedal value, e.g. B. a relative pedal value between 0% and 100%, from the external (marine) electronic system and / or the control computer 3 to be received.
- the liquid fuel control device 10 can further be designed to determine the target torque depending on the received pedal value, e.g. B. by means of the communication interface 11.
- the speed controller module 12 can be inactive or not present.
- the at least one stored map can include at least one map for the mono-fuel mode and at least one map for the dual-fuel mode.
- the determination of the target metering quantity and other target parameters such as a target metering start time, a target metering pressure and / or a target metering number of the liquid fuel (i.e. target values of the dosage) can be done, for example.
- target metering quantity and other target parameters such as a target metering start time, a target metering pressure and / or a target metering number of the liquid fuel (i.e. target values of the dosage) can be done, for example.
- the mono-fuel mode by means of a mono-fuel dosing setpoint determination module 13 of the liquid fuel control unit 10 and for the dual fuel mode by means of a dual fuel dosing setpoint determination module 14 of the liquid fuel -Control device 1O depending on the at least one stored map for the mono-fuel mode, preferably dependent on an engine operating point of the dual-fuel internal combustion engine, or the at least one stored map, preferably dependent on an engine operating point of the dual-fuel internal combustion engine for the dual fuel mode and preferably the actual speed, the actual torque and / or the actual metering quantity.
- the liquid fuel control device 10 can also have an implementation module 16 for regulating and / or controlling the at least one further parameter of the liquid fuel metering device 17, e.g. B. the dosing pressure and / or the dosing duration, depending on the setpoint values of the dosage determined by means of the mono-fuel dosing setpoint determination module 13 or the dual-fuel dosing setpoint determination module 14.
- an implementation module 16 for regulating and / or controlling the at least one further parameter of the liquid fuel metering device 17, e.g. B. the dosing pressure and / or the dosing duration, depending on the setpoint values of the dosage determined by means of the mono-fuel dosing setpoint determination module 13 or the dual-fuel dosing setpoint determination module 14.
- the liquid fuel control device 10 can further have a switching module 15 that correspondingly can be switched to mono-fuel mode or dual-fuel mode.
- the gas fuel control device 20 can be designed to regulate and/or control the at least one parameter of the gas fuel metering device in the dual-fuel mode as a function of an engine operating point of the dual-fuel internal combustion engine.
- the gas fuel control device 20 can also be designed to receive at least one message, which includes the engine operating point, from the liquid fuel control device 10.
- the determination of a target metering quantity and other target parameters such as a target metering start time, a target metering pressure and/or a target metering number of the gaseous fuel (i.e. target dosage values) can be used for the dual fuel mode, for example. B. by means of a dosing setpoint determination module 22 of the gas fuel control unit 20 depending on the engine operating point of the dual-fuel internal combustion engine.
- the gas fuel control device 20 can also have an implementation module 23 for regulating and / or controlling the at least one further parameter of the gas fuel metering device 24, e.g. B. the dosing pressure and / or the dosing duration, depending on the setpoint values of the dosage determined by means of the dosing setpoint determination module 22.
- an implementation module 23 for regulating and / or controlling the at least one further parameter of the gas fuel metering device 24, e.g. B. the dosing pressure and / or the dosing duration, depending on the setpoint values of the dosage determined by means of the dosing setpoint determination module 22.
- liquid fuel metering device 17 is a common rail injection system, the ignition and combustion of a mixture from the gaseous fuel and air in the combustion chambers can be optimally designed.
- the self-ignition of the liquid fuel in particular a diesel fuel
- the gaseous fuel in particular a hydrogen fuel
- the metering pressure of the common rail injection system which regulates and/or controls the penetration of the injection jet of liquid fuel and its atomization.
- the self-ignition point can be set specifically in order to achieve the best possible heat release from the combustion of the gaseous fuel. The highest resulting flame temperatures remain below a threshold above which rapid NO x formation occurs. Under the conditions described, smaller amounts of nitrogen oxide are produced in the dual-fuel combustion process than in the mono-fuel combustion of liquid fuel.
- a switch from the mono-fuel mode to the dual-fuel mode can be initiated by the following sequence if the at least one switching condition is fulfilled: a) sending a release message by the liquid fuel control device 10 to the gas fuel control device 20, that in the dual-fuel mode may be switched, b) sending a request message, preferably in response to the release message, by the gas fuel control device 20 to the liquid fuel control device 10 to request a switch from mono-fuel mode to dual-fuel mode, and c) sending a feedback message, preferably in response to the request message, by the liquid fuel control device 10 to the gas fuel control device 20 that a switch from mono-fuel mode to dual-fuel mode is initiated.
- the liquid fuel control device 10 and/or the gas fuel control device 20 can thus coordinate the switchover via the communication connection.
- the at least one switching condition for switching from the mono-fuel mode to the dual-fuel mode can be a threshold value exceeding and/or a threshold value falling below the threshold value of at least one predetermined threshold value of at least one physical quantity of the dual-fuel internal combustion engine, preferably a pressure and/or a temperature, include error-free operation of the liquid fuel control device 10 and/or error-free operation of the gas fuel control device 20.
- the gas fuel control device 20 can check at least one gas fuel-specific switching condition and/or a content of the release message and only send the request message when the at least one gas fuel-specific switching condition is met and/or the content of the release message meets at least one predetermined criterion.
- the liquid fuel control device 10 and/or the gas fuel control device 20 may further be configured to initiate a switch from dual-fuel mode to mono-fuel mode (or to remain in mono-fuel mode) if and/or or as soon as at least one of the following switching conditions exists: a faulty and/or interrupted communication connection between the liquid fuel control device 10 and the gas fuel control device 20, incorrect operation of the liquid fuel control device 10, e.g. B. a faulty sensor of the liquid fuel control unit 10, incorrect operation of the gas fuel control unit 20, e.g. B. a faulty sensor of the liquid fuel control device 20, a limit violation of at least one predetermined limit value of at least one physical quantity of the dual-fuel internal combustion engine, preferably a pressure and / or a temperature, e.g. B.
- a boost pressure of a charge air below a predetermined limit boost pressure and / or a pressure in a gas fuel metering device 24 outside a predetermined pressure range an insufficient amount of gaseous fuel in a gas fuel tank, a leak through which the gaseous fuel escapes before and a faulty sensor system 30 for detecting a leak through which the gaseous fuel escapes.
- further monitoring can be added in dual-fuel mode.
- the liquid fuel control device 10 or the gas fuel control device 20 detects one of the errors or limit value violations listed above, the metering of the gaseous fuel to the dual-fuel internal combustion engine can be stopped.
- the liquid fuel control device 10 or the gas fuel control device 20 can coordinate the immediate switch back to the mono-fuel mode.
- the switch from dual-fuel mode to mono-fuel mode can occur (essentially immediately) as soon as one of the switchover conditions (for a switch from dual-fuel mode to mono-fuel mode) is met and/or as soon as the liquid fuel control device 10 and/or the gas fuel control device 20 signals the switchover and/or the existence of one of the switchover conditions. This can be done by switching e.g. B. can preferably be initiated directly and/or without a further message by withdrawing at least one of the release message, the request message and/or the feedback message.
- the liquid fuel control unit 10 can carry out the necessary diagnoses and error reactions.
- the dual-fuel internal combustion engine shows the same error reactions as a conventional internal combustion engine that is designed exclusively for operation with liquid fuel.
- control device 100 can also be designed to detect a leak through which the gaseous fuel escapes.
- the detection of a leak for the dual-fuel internal combustion engine during operation (dynamic see leakage test) and can be carried out with the dual-fuel internal combustion engine switched off (static leakage test). If a leak is detected, e.g. B. an error flag is set, the metering of the gaseous fuel is stopped and a user is informed.
- control device 100 can be connected to a sensor system 30 for signaling purposes.
- a leak can be detected if a detected leak gas mass flow is above a predetermined threshold.
- a leak may be detectable when a pressure in the gas fuel metering device 24 is below a predetermined pressure threshold value.
- the pressure in the gas fuel metering device 24, in particular at its nozzles and/or injectors, can be monitored repeatedly, in particular continuously, and can also be used to detect low-pressure leaks or deviations in the flow. Should there be a reduced flow of gaseous fuel to the dual-fuel internal combustion engine, the pressure would z. B. drop at the nozzles and/or injectors.
- the control device can do this e.g. B. report with an error flag, whereupon the user is informed and the dual-fuel internal combustion engine can be immediately brought into safe mono-fuel mode.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022107551.6A DE102022107551A1 (de) | 2022-03-30 | 2022-03-30 | Steuervorrichtung für eine Dual-Fuel-Brennkraftmaschine |
| PCT/EP2023/058120 WO2023186972A1 (de) | 2022-03-30 | 2023-03-29 | Steuervorrichtung für eine dual-fuel-brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4499998A1 true EP4499998A1 (de) | 2025-02-05 |
Family
ID=85984966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23716442.1A Withdrawn EP4499998A1 (de) | 2022-03-30 | 2023-03-29 | Steuervorrichtung für eine dual-fuel-brennkraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4499998A1 (de) |
| DE (1) | DE102022107551A1 (de) |
| WO (1) | WO2023186972A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025181818A1 (en) * | 2024-02-29 | 2025-09-04 | Kirloskar Oil Engines Limited | A hydrogen-diesel dual fuel power generating system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011087988A1 (de) * | 2011-12-08 | 2013-06-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Überprüfung einer Funktionsfähigkeit einer von einem Multi-Fuel-System betriebenen Brennkraftmaschine |
| JP6049415B2 (ja) * | 2012-11-14 | 2016-12-21 | 三菱重工業株式会社 | ディーゼルエンジンの制御装置、ディーゼルエンジン、及びディーゼルエンジンの制御方法 |
| US20140182560A1 (en) | 2012-12-30 | 2014-07-03 | General Electric Company | Variable speed dual fueled engine and electrical power management apparatus and methods |
| US10677175B2 (en) * | 2016-01-15 | 2020-06-09 | Cummins Inc. | Ventilation controls for dual-fuel engines |
| DE102016118976A1 (de) * | 2016-10-06 | 2018-04-12 | Man Diesel & Turbo Se | Verfahren zur Startvorbereitung und vorzugsweise zum nachfolgenden Starten einer als Gasmotor oder Dual-Fuel-Motor ausgebildeten Brennkraftmaschine |
| DE102018113330B4 (de) | 2017-06-09 | 2025-01-02 | Steering Solutions Ip Holding Corporation | Computerimplementiertes Verfahren zum Bewerten einer über redundante Kommunikationskanäle empfangenen Netzwerk-Kommunikation und Kommunikationssystem |
| US11035317B2 (en) * | 2019-06-06 | 2021-06-15 | Caterpillar Inc. | Controlling pilot fuel injection in an engine |
-
2022
- 2022-03-30 DE DE102022107551.6A patent/DE102022107551A1/de active Pending
-
2023
- 2023-03-29 EP EP23716442.1A patent/EP4499998A1/de not_active Withdrawn
- 2023-03-29 WO PCT/EP2023/058120 patent/WO2023186972A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022107551A1 (de) | 2023-10-05 |
| WO2023186972A1 (de) | 2023-10-05 |
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