WO2022185294A1 - Rapid flame controller with continuously variable response - Google Patents
Rapid flame controller with continuously variable response Download PDFInfo
- Publication number
- WO2022185294A1 WO2022185294A1 PCT/IB2022/052542 IB2022052542W WO2022185294A1 WO 2022185294 A1 WO2022185294 A1 WO 2022185294A1 IB 2022052542 W IB2022052542 W IB 2022052542W WO 2022185294 A1 WO2022185294 A1 WO 2022185294A1
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- Prior art keywords
- fuel
- continuously variable
- valves
- control
- variable response
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/005—Regulating fuel supply using electrical or electromechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
- F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/18—Groups of two or more valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/04—Gaseous fuels
Definitions
- the present invention is a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, capable of allowing greater assertiveness, repeatability and refinement in process control.
- the innovation is directed to the area of regulation and control of gaseous fuel.
- Equipment with direct or indirect heating is used for the current heating, drying and roasting processes of food products, which have electrical devices or apparatus for burning gaseous fuels as a source of heat.
- mechanical valves are used to control the flow of gas, as a metering resource for the intensity of the flame, capable of controlling the introduction of energy into the process and indirectly adjusting the temperature.
- mechanical valves of the ball, needle, gate or cylinder type with mechanical or electromechanical rotary and linear actuators are used to restrict the flow of gas and control the flow. These devices have limited actuation speed and sometimes with high hysteresis and reduced repeatability and stability. In an attempt to minimize these inconveniences, the market uses valves with constructive refinement and high costs.
- valves are sometimes equipped with mechanical flow linearization through the profile of the seat and actuator set and with stepper or servo motor actuation systems.
- Patent EP2923057_B1 entitled “Fuel injector calibration and trimming” uses a control of the volume of gas to be injected, correcting the quantity according to a previous calibration that indicates losses and differences between nominal and effectively injected quantity.
- Patent US6244525_B1 entitled “Fuel injector for an internal combustion engine” adds rotation to the injection and modifies the injector profile to improve nozzle response speed and avoid dead time.
- the present invention uses the concept of patent US10158347-B2, entitled “Device and method for providing a signal having and adjustable pulse duty factor", to control the flow of gaseous fuel in heating systems.
- This invention aims to provide a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, allowing for more assertive, repetitive and refined control of the processes.
- This controller is made up of one or a set of electromagnetic or piezoelectric fuel injectors/valves (3), whose quantity is adapted to the demand for fuel consumed by the systems, which allow, through electro-electronic actuation, refined control of the flow of fuel to be burned and consequent indirect control of the main source of energy introduced in the process for which it is being used.
- These fuel injectors/valves (3) comprise: an injection valve provided with a movable needle; a support body; and an electromagnetic or piezoelectric actuator.
- the apparatus uses one or more processors and circuits for electrical supply, process sensing and power amplification (1) composing an electronic system to control the fuel flow through the adjustment of injection times, frequency of drives and lag (Modulation by Pulse Width - PWM) of the fuel injectors/valves (3), which results in an instantaneous and repeatable control of the flame intensity with a wide linear working range, also allowing compensation for the characteristics of the fuels and operating conditions, taking advantage of injection phases, when multiple injectors are used, in order to reduce flame pulsation and increase its stability.
- processors and circuits for electrical supply, process sensing and power amplification
- this system is efficient for the control of the flow of fuel gas, guaranteeing a fast and precise actuation in the intensity of the flame (dosing of the energy source), with reduced pulsation, all this at a low cost and adequate to the conditions operation, safety and durability.
- Block diagram of fast flame controller with continuously variable response Opening delay for 2 injectors/valves. Opening delay for 3 injectors/valves. [Fig. 4] Opening delay for 4 injectors/valves.
- the product to be patented consists of one or more processors and circuits for electrical supply, process sensing and power amplification (1) which, through command lines (2) control the amount of gas (4), through of one or a set of gaseous fuel injectors/valves (3), providing an adequate gas outlet (5) to meet the demand for fuel consumed by the heating, drying and roasting system of food products (figure 1).
- Each of these fuel injectors/valves (3) is characterized by having: an injection valve provided with a movable needle to regulate the flow of fuel through an injection nozzle; a support body, having a supply channel that ends in the injection valve; and an electromagnetic or piezoelectric actuator, comprising a spring, which tends to keep the needle in the closed position, an electromagnet or piezoelectric crystal and a retainer, arranged inside the supporting body, against the spring's propensity, mechanically connected to the needle. .
- Such fuel injectors/valves (3) allow, through electro-electronic actuation, refined control of the flow of fuel to be burned and consequent indirect control of the main source of energy introduced in the process for which it is being used.
- the processors and circuits for electrical supply, process sensing and power amplification (1) make up an electronic system for controlling the flow of fuel by adjusting injection times, frequency of drives and lag (Pulse Width Modulation - PWM ) of the fuel injectors/valves (3), which results in an instantaneous and repetitive control of the flame intensity with a wide linear working range, also allowing compensation for the characteristics of the fuels and operating conditions, using injection phases , when multiple injectors are used, in order to reduce flame pulsation and increase its stability.
- the number of fuel injectors/valves (3) will depend on the functional characteristic of the fuel injectors/valves (3), flow, linearity curve and the demand of the system where they will be used.
- a lag strategy is also used between the fuel injections of each of the injectors, for example: in the case of 2 injectors, 180o valve opening lag (figure 2), in the case of 3 120o lag injectors (figure 3), in the case of 4 90o lag injectors (figure 4) and so on, the lag being inversely proportional to the number of injectors.
- This invention aims to provide a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, allowing for more assertive, repetitive and refined control of the processes.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
Controlador rapido de Chamas com Resposta Continuamente VariavelFast Flame Controller with Continuously Variable Response
A presente invenção trata-se de um controlador rápido de chamas com resposta continuamente variável a ser adotado em sistemas de aquecimento, de secagem e de torras de produtos alimentícios apto a permitir maior assertividade, repetitividade e refinamento no controle dos processos.
A inovação está direcionada à área de regulação e controle de combustível gasoso.The present invention is a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, capable of allowing greater assertiveness, repeatability and refinement in process control.
The innovation is directed to the area of regulation and control of gaseous fuel.
Equipamentos com aquecimento direto ou indireto são utilizados para os atuais processos de aquecimento, de secagem e de torra de produtos alimentícios, os quais possuem como fonte de calor dispositivos elétricos ou aparatos para queima de combustíveis gasosos.
Para os sistemas que utilizam combustíveis gasosos são empregadas válvulas mecânicas para controle do fluxo de gás, como recurso dosador da intensidade da chama, capazes de controlar a introdução de energia no processo e de ajustar, de modo indireto, a temperatura.
Como estado da técnica, são utilizadas válvulas mecânicas do tipo esfera, agulha, gaveta ou cilindros com atuadores mecânicos ou eletromecânicos rotativos e lineares para restrição do fluxo de gás e controle da vazão. Esses dispositivos possuem velocidade de atuação limitada e por vezes com elevada histerese e reduzidas repetitividade e estabilidade.
Na tentativa de minimizar esses inconvenientes, o mercado utiliza válvulas com refinamento construtivo e custos elevados. Tais válvulas são dotadas, algumas vezes, de linearização mecânica do fluxo através do perfil do conjunto sede e atuador e de sistemas de atuação por motores de passo ou servo motores.
Tendo em vista esse cenário, buscou-se a confecção/elaboração de um sistema para controle do fluxo de gás combustível eficaz, isto é, com atuação rápida e precisa, que garanta a segurança dos processos, que seja susceptível a controles elétrico-eletrônicos para assegurar, concomitantemente, as resistências mecânica e elétrica demandadas para a operação do restante da máquina; e, ainda, que não possua inconvenientes como histerese e complexidade construtiva.
A patente EP2923057_B1, intitulada "Fuel injector calibration and trimming", utiliza um controle do volume de gás a ser injetado, corrigindo a quantidade de acordo com calibração prévia que indica perdas e diferenças entre quantidade nominal e efetivamente injetada. A patente US6244525_B1, intitulada "Fuel injector for an internal combustion engine", adiciona rotação à injeção e modifica perfil do injetor para melhorar a velocidade de resposta do bico e evitar o tempo morto.
Visando evitar mudança de ferramental ou serviço de calibração, a presente invenção utiliza o conceito da patente US10158347-B2, intitulada “Device and method for providing a signal having and ajustable pulse duty factor”, para controlar o fluxo de combustível gasoso em sistemas de aquecimento, de secagem e de torras de produtos alimentícios, fazendo uso de um ou de um conjunto de injetores (válvula) de combustível gasoso controlados por processadores através do ajuste dos tempos de injeção, frequência dos acionamentos e defasagem (Modulação por Largura do Pulso - PWM) dos injetores/válvulas de combustíveis (3), que resulta em um controle instantâneo e repetitivo da intensidade da chama com ampla faixa linear de trabalho, permitindo compensações pelas características dos combustíveis e pelas condições de operação, valendo-se de fases de injeção, quando utilizados múltiplos injetores, para reduzir a pulsação da chama e para aumentar a sua estabilidade.Equipment with direct or indirect heating is used for the current heating, drying and roasting processes of food products, which have electrical devices or apparatus for burning gaseous fuels as a source of heat.
For systems that use gaseous fuels, mechanical valves are used to control the flow of gas, as a metering resource for the intensity of the flame, capable of controlling the introduction of energy into the process and indirectly adjusting the temperature.
As a state of the art, mechanical valves of the ball, needle, gate or cylinder type with mechanical or electromechanical rotary and linear actuators are used to restrict the flow of gas and control the flow. These devices have limited actuation speed and sometimes with high hysteresis and reduced repeatability and stability.
In an attempt to minimize these inconveniences, the market uses valves with constructive refinement and high costs. Such valves are sometimes equipped with mechanical flow linearization through the profile of the seat and actuator set and with stepper or servo motor actuation systems.
In view of this scenario, we sought to design/elaborate a system to control the flow of effective fuel gas, that is, with fast and precise action, which guarantees the safety of the processes, which is susceptible to electrical-electronic controls for ensure, at the same time, the mechanical and electrical resistance required for the operation of the rest of the machine; and also that it does not have drawbacks such as hysteresis and constructive complexity.
The patent EP2923057_B1, entitled "Fuel injector calibration and trimming", uses a control of the volume of gas to be injected, correcting the quantity according to a previous calibration that indicates losses and differences between nominal and effectively injected quantity. Patent US6244525_B1 entitled "Fuel injector for an internal combustion engine" adds rotation to the injection and modifies the injector profile to improve nozzle response speed and avoid dead time.
In order to avoid tooling change or calibration service, the present invention uses the concept of patent US10158347-B2, entitled "Device and method for providing a signal having and adjustable pulse duty factor", to control the flow of gaseous fuel in heating systems. , drying and roasting of food products, making use of one or a set of gaseous fuel injectors (valve) controlled by processors through the adjustment of injection times, frequency of drives and lag (Pulse Width Modulation - PWM ) of the fuel injectors/valves (3), which results in an instantaneous and repetitive control of the flame intensity with a wide linear working range, allowing compensation for the characteristics of the fuels and for the operating conditions, making use of injection phases, when multiple injectors are used, to reduce flame pulsation and to increase its stability.
Prover um controlador rápido de chamas com resposta continuamente variável a ser adotado em sistemas de aquecimento, de secagem e de torras de produtos alimentícios permitindo controle mais assertivo, repetitivo e refinado dos processos.Provide a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, allowing for more assertive, repetitive and refined control of the processes.
Esta invenção tem como objetivo prover um controlador rápido de chamas com resposta continuamente variável a ser adotado em sistemas de aquecimento, de secagem e de torras de produtos alimentícios permitindo controle mais assertivo, repetitivo e refinado dos processos.This invention aims to provide a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, allowing for more assertive, repetitive and refined control of the processes.
Este controlador é constituído de um ou de um conjunto de injetores/válvulas de combustíveis (3) eletromagnéticos ou piezoelétricos, cuja quantidade se adequa à demanda de combustível consumido pelos sistemas, que permitem, através de atuação eletroeletrônica, controle refinado do fluxo de combustível a ser queimado e consequente controle indireto da principal fonte de energia introduzida no processo para o qual está sendo empregado. Esses injetores/válvulas de combustíveis (3) compreendem: uma válvula de injeção provida de uma agulha móvel; um corpo de suporte; e um atuador eletromagnético ou piezoelétrico.
O aparato utiliza um ou mais processadores e circuitos para alimentação elétrica, sensoriamento do processo e amplificação de potência (1) compondo um sistema eletrônico para o controle do fluxo de combustível através do ajuste dos tempos de injeção, frequência dos acionamentos e defasagem (Modulação por Largura do Pulso - PWM) dos injetores/válvulas de combustíveis (3), que resulta em um controle instantâneo e repetitivo da intensidade da chama com ampla faixa linear de trabalho, permitindo ainda compensações pelas características dos combustíveis e das condições de operação, valendo-se de fases de injeção, quando utilizados múltiplos injetores, visando reduzir a pulsação da chama e aumento de sua estabilidade.This controller is made up of one or a set of electromagnetic or piezoelectric fuel injectors/valves (3), whose quantity is adapted to the demand for fuel consumed by the systems, which allow, through electro-electronic actuation, refined control of the flow of fuel to be burned and consequent indirect control of the main source of energy introduced in the process for which it is being used. These fuel injectors/valves (3) comprise: an injection valve provided with a movable needle; a support body; and an electromagnetic or piezoelectric actuator.
The apparatus uses one or more processors and circuits for electrical supply, process sensing and power amplification (1) composing an electronic system to control the fuel flow through the adjustment of injection times, frequency of drives and lag (Modulation by Pulse Width - PWM) of the fuel injectors/valves (3), which results in an instantaneous and repeatable control of the flame intensity with a wide linear working range, also allowing compensation for the characteristics of the fuels and operating conditions, taking advantage of injection phases, when multiple injectors are used, in order to reduce flame pulsation and increase its stability.
Assim, fica evidente que este sistema é eficiente para o controle de fluxo de gás combustível, garantindo uma rápida e precisa atuação na intensidade da chama (dosabilidade da fonte de energia), com pulsação reduzida, tudo isso a um custo baixo e adequados às condições de operação, segurança e de durabilidade.Thus, it is evident that this system is efficient for the control of the flow of fuel gas, guaranteeing a fast and precise actuation in the intensity of the flame (dosing of the energy source), with reduced pulsation, all this at a low cost and adequate to the conditions operation, safety and durability.
[Fig. 4] Defasagem da abertura para 4 injetores/válvulas.
[Fig. 4] Opening delay for 4 injectors/valves.
O produto a ser patenteado constitui-se em um ou mais processadores e circuitos para alimentação elétrica, sensoriamento do processo e amplificação de potência (1) que, por meio de linhas de comando (2) controlam a quantidade de gás (4), através de um ou um conjunto de injetores/válvulas de combustíveis (3) gasoso, propiciando uma saída de gás (5) adequada para atender à demanda de combustível consumido pelo sistema de aquecimento, de secagem e de torras de produtos alimentícios (figura 1).
Cada um desses injetores/válvulas de combustíveis (3) é caracterizado por possuir: uma válvula de injeção provida de uma agulha móvel para regular o fluxo de combustível através de um bico injetor; um corpo de suporte, apresentando um canal de alimentação que termina na válvula de injeção; e um atuador eletromagnético ou piezoelétrico, que compreende uma mola, a qual tende a manter a agulha na posição de fechamento, um eletroímã ou cristal piezoelétrico e um retentor, disposto dentro do corpo de suporte, contra a propensão da mola, mecanicamente conectados à agulha. Tais injetores/válvulas de combustíveis (3) permitem, através de atuação eletroeletrônica, controle refinado do fluxo de combustível a ser queimado e consequente controle indireto da principal fonte de energia introduzida no processo para o qual está sendo empregado.
Os processadores e circuitos para alimentação elétrica, sensoriamento do processo e amplificação de potência (1) compõem um sistema eletrônico para o controle do fluxo de combustível através do ajuste dos tempos de injeção, frequência dos acionamentos e defasagem (Modulação por Largura do Pulso - PWM) dos injetores/válvulas de combustíveis (3), que resulta em um controle instantâneo e repetitivo da intensidade da chama com ampla faixa linear de trabalho, permitindo ainda compensações pelas características dos combustíveis e das condições de operação, valendo-se de fases de injeção, quando utilizados múltiplos injetores, visando reduzir a pulsação da chama e aumento de sua estabilidade.
A quantidade de injetores/válvulas de combustíveis (3) vai depender da característica funcional dos injetores/válvulas de combustíveis (3), vazão, curva de linearidade e da demanda do sistema onde serão empregados. Deve-se ter uma quantidade de injetores/válvulas de combustíveis (3) de tal forma a garantir o melhor compromisso entre o mínimo e o máximo de chama no sistema de queimador empregado. Deve-se evitar também que os injetores/válvulas de combustíveis (3) trabalhem na região não linear ajustando o tempo de abertura para injeção (T). A conjugação da quantidade de injetores/válvulas de combustíveis (3) e o ajuste do tempo de abertura destes irá garantir o controle da chama.The product to be patented consists of one or more processors and circuits for electrical supply, process sensing and power amplification (1) which, through command lines (2) control the amount of gas (4), through of one or a set of gaseous fuel injectors/valves (3), providing an adequate gas outlet (5) to meet the demand for fuel consumed by the heating, drying and roasting system of food products (figure 1).
Each of these fuel injectors/valves (3) is characterized by having: an injection valve provided with a movable needle to regulate the flow of fuel through an injection nozzle; a support body, having a supply channel that ends in the injection valve; and an electromagnetic or piezoelectric actuator, comprising a spring, which tends to keep the needle in the closed position, an electromagnet or piezoelectric crystal and a retainer, arranged inside the supporting body, against the spring's propensity, mechanically connected to the needle. . Such fuel injectors/valves (3) allow, through electro-electronic actuation, refined control of the flow of fuel to be burned and consequent indirect control of the main source of energy introduced in the process for which it is being used.
The processors and circuits for electrical supply, process sensing and power amplification (1) make up an electronic system for controlling the flow of fuel by adjusting injection times, frequency of drives and lag (Pulse Width Modulation - PWM ) of the fuel injectors/valves (3), which results in an instantaneous and repetitive control of the flame intensity with a wide linear working range, also allowing compensation for the characteristics of the fuels and operating conditions, using injection phases , when multiple injectors are used, in order to reduce flame pulsation and increase its stability.
The number of fuel injectors/valves (3) will depend on the functional characteristic of the fuel injectors/valves (3), flow, linearity curve and the demand of the system where they will be used. There must be a number of fuel injectors/valves (3) in such a way as to guarantee the best compromise between minimum and maximum flame in the burner system used. It should also be avoided that the fuel injectors/valves (3) work in the non-linear region by adjusting the opening time for injection (T). The combination of the number of fuel injectors/valves (3) and the adjustment of their opening time will ensure flame control.
ExemplosExamples
Visando a garantia da estabilidade da chama, é empregada também estratégia de defasagem entre as injeções de combustível de cada um dos injetores, como por exemplo: no caso de 2 injetores defasagem da abertura da válvula de 180º (figura 2), no caso de 3 injetores defasagem de 120º (figura 3), no caso de 4 injetores defasagem de 90º (figura 4) e assim sucessivamente, sendo a defasagem inversamente proporcional à quantidade de injetores.In order to guarantee flame stability, a lag strategy is also used between the fuel injections of each of the injectors, for example: in the case of 2 injectors, 180º valve opening lag (figure 2), in the case of 3 120º lag injectors (figure 3), in the case of 4 90º lag injectors (figure 4) and so on, the lag being inversely proportional to the number of injectors.
Esta invenção tem como objetivo prover um controlador rápido de chamas com resposta continuamente variável a ser adotado em sistemas de aquecimento, de secagem e de torras de produtos alimentícios permitindo controle mais assertivo, repetitivo e refinado dos processos.This invention aims to provide a fast flame controller with a continuously variable response to be adopted in heating, drying and roasting systems for food products, allowing for more assertive, repetitive and refined control of the processes.
EP2923057_B1; US6244525_B1; US10148347_B2EP2923057_B1; US6244525_B1; US10148347_B2
patcit1: patcit1:
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Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22762724.7A EP4303493A1 (en) | 2021-03-02 | 2022-03-21 | Rapid flame controller with continuously variable response |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR2021039375 | 2021-03-02 | ||
| BRPCT/BR2021/039375 | 2021-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2022185294A1 true WO2022185294A1 (en) | 2022-09-09 |
| WO2022185294A4 WO2022185294A4 (en) | 2022-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2022/052542 Ceased WO2022185294A1 (en) | 2021-03-02 | 2022-03-21 | Rapid flame controller with continuously variable response |
Country Status (2)
| Country | Link |
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| EP (1) | EP4303493A1 (en) |
| WO (1) | WO2022185294A1 (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590642A (en) * | 1995-01-26 | 1997-01-07 | Gas Research Institute | Control methods and apparatus for gas-fired combustors |
| EP1058060A1 (en) * | 1999-06-02 | 2000-12-06 | Sit la Precisa S.p.a. | A valve unit for modulating the delivery pressure of a gas |
| US6244525B1 (en) | 1998-01-20 | 2001-06-12 | Sagem S.A. | Fuel injector for an internal combustion engine |
| US6918757B2 (en) * | 2002-08-29 | 2005-07-19 | Noritz Corporation | Combustion apparatus |
| EP1222429B1 (en) * | 1999-10-18 | 2008-09-03 | Pierre Repper | Electronic gas cooktop control with simmer system |
| WO2013017346A1 (en) * | 2011-08-03 | 2013-02-07 | Sit La Precisa S.P.A. Con Socio Unico | A method and a system for controlling a modulating valve unit including an electromagnet |
| EP2923057A1 (en) | 2012-11-21 | 2015-09-30 | Westport Power Inc. | Fuel injector calibration and trimming |
| US10158347B2 (en) | 2014-09-09 | 2018-12-18 | Robert Bosch Gmbh | Device and method for providing a signal having an adjustable pulse duty factor |
| US10240785B2 (en) * | 2010-01-28 | 2019-03-26 | Noritz Corporation | Driving method for solenoid valve, solenoid valve driving apparatus, and combustion apparatus including same |
| KR102057972B1 (en) * | 2018-10-29 | 2019-12-20 | 린나이코리아 주식회사 | Electronic valve control method for gas range |
| CN110657458A (en) * | 2018-06-28 | 2020-01-07 | 三美电机株式会社 | Electronic control device, semiconductor integrated circuit device for electronic control, and gas range |
-
2022
- 2022-03-21 WO PCT/IB2022/052542 patent/WO2022185294A1/en not_active Ceased
- 2022-03-21 EP EP22762724.7A patent/EP4303493A1/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590642A (en) * | 1995-01-26 | 1997-01-07 | Gas Research Institute | Control methods and apparatus for gas-fired combustors |
| US6244525B1 (en) | 1998-01-20 | 2001-06-12 | Sagem S.A. | Fuel injector for an internal combustion engine |
| EP1058060A1 (en) * | 1999-06-02 | 2000-12-06 | Sit la Precisa S.p.a. | A valve unit for modulating the delivery pressure of a gas |
| EP1222429B1 (en) * | 1999-10-18 | 2008-09-03 | Pierre Repper | Electronic gas cooktop control with simmer system |
| US6918757B2 (en) * | 2002-08-29 | 2005-07-19 | Noritz Corporation | Combustion apparatus |
| US10240785B2 (en) * | 2010-01-28 | 2019-03-26 | Noritz Corporation | Driving method for solenoid valve, solenoid valve driving apparatus, and combustion apparatus including same |
| WO2013017346A1 (en) * | 2011-08-03 | 2013-02-07 | Sit La Precisa S.P.A. Con Socio Unico | A method and a system for controlling a modulating valve unit including an electromagnet |
| EP2923057A1 (en) | 2012-11-21 | 2015-09-30 | Westport Power Inc. | Fuel injector calibration and trimming |
| US10158347B2 (en) | 2014-09-09 | 2018-12-18 | Robert Bosch Gmbh | Device and method for providing a signal having an adjustable pulse duty factor |
| CN110657458A (en) * | 2018-06-28 | 2020-01-07 | 三美电机株式会社 | Electronic control device, semiconductor integrated circuit device for electronic control, and gas range |
| KR102057972B1 (en) * | 2018-10-29 | 2019-12-20 | 린나이코리아 주식회사 | Electronic valve control method for gas range |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022185294A4 (en) | 2022-10-20 |
| EP4303493A1 (en) | 2024-01-10 |
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