公开(公告)号：US11466635B2

公开(公告)日：2022-10-11

申请号：US17473631

申请日：2021-09-13

Applicant: Axel O. zur Loye ,  Christopher Pollitt ,  Timothy O. Lutz

Inventor： Axel O. zur Loye ,  Christopher Pollitt ,  Timothy O. Lutz

IPC: F02D41/14 ,  F02D41/00 ,  F02D19/06 ,  F02D23/00 ,  F02B37/18 ,  F02D41/24 ,  F02D9/04 ,  F02D41/40

Abstract: Methods and systems of controlling a dual fuel engine with at least two banks of cylinders are provided. The method may include sensing at least one of temperatures of exhaust from the at least two banks and a pressure of an intake manifold of the at least two banks, and adjusting at least one of a gas flow, a charge flow, or an air flow to one of the at least two banks to balance one of exhaust temperatures of the at least two banks and intake manifold pressures of the at least two banks.

公开(公告)号：US09151202B2

公开(公告)日：2015-10-06

申请号：US13271626

申请日：2011-10-12

Applicant: Colin L. Norris ,  Richard J. Ancimer ,  Axel O. zur Loye ,  Randy W. Nelson ,  Gary Charles Salemme ,  Ousmane Gueye ,  John Franklin Wright

Inventor： Colin L. Norris ,  Richard J. Ancimer ,  Axel O. zur Loye ,  Randy W. Nelson ,  Gary Charles Salemme ,  Ousmane Gueye ,  John Franklin Wright

IPC: F01N3/00 ,  F01N3/20 ,  F01N9/00 ,  F01N13/00 ,  F01N13/08

CPC classification number: F01N13/011 ,  F01N3/2066 ,  F01N9/00 ,  F01N13/087 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs.

Abstract translation: 用于处理来自内燃机的排气的排气后处理系统及相关方法允许独立地控制通过排气后处理系统的多个排气支路的排气流。 排气流的独立控制是通过基于由沿着至少一个排气支路定位的流量测量装置产生的信号的值来调节位于每个排气支路中的阀来进行的。 可以调整阀门以迫使排气腿中的目标流动，排气腿之间的相对流动，排气腿中的排气温度，排气背压和/或排气腿内的不平衡。

公开(公告)号：US06286482B1

公开(公告)日：2001-09-11

申请号：US08916437

申请日：1997-08-22

Applicant: Patrick F. Flynn ,  Gary L. Hunter ,  Axel O. zur Loye ,  Omowoleoia C. Akinyemi ,  Russ P. Durrett ,  Greg A. Moore ,  Jackie M. Mudd ,  George G. Muntean ,  Julie A. Wagner ,  John F. Wright

Inventor： Patrick F. Flynn ,  Gary L. Hunter ,  Axel O. zur Loye ,  Omowoleoia C. Akinyemi ,  Russ P. Durrett ,  Greg A. Moore ,  Jackie M. Mudd ,  George G. Muntean ,  Julie A. Wagner ,  John F. Wright

IPC: F02M700

CPC classification number: F02D41/3029 ,  F02B1/12 ,  F02B3/06 ,  F02B19/14 ,  F02B2075/025 ,  F02B2275/32 ,  F02D13/0203 ,  F02D13/0215 ,  F02D13/0261 ,  F02D13/0269 ,  F02D15/04 ,  F02D19/0649 ,  F02D35/023 ,  F02D41/0025 ,  F02D41/3035 ,  F02D41/3041 ,  F02D41/38 ,  F02D2013/0292 ,  F02M26/01 ,  F02M26/07 ,  F02M26/08 ,  F02M26/23 ,  F02M26/28 ,  F02M26/33 ,  F02M26/43 ,  F02M31/02 ,  F02M31/20 ,  F02P19/00 ,  Y02T10/12 ,  Y02T10/125 ,  Y02T10/126 ,  Y02T10/128 ,  Y02T10/142 ,  Y02T10/36 ,  Y02T10/42

Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and\or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.

Abstract translation: 提供了预混合充气压缩点火发动机和控制系统，其通过压缩点火有效地启动燃烧并保持稳定的燃烧，同时实现极低的氮氧化物排放，良好的总体效率和可接受的燃烧噪声和气缸压力。 本发动机和控制系统通过控制提供温度控制的某些控制变量的操作来有效地控制燃烧历史，即燃烧发生时间，燃烧速率，燃烧持续时间和/或燃烧完整性 ，压力控制，混合物自燃特性控制和当量比控制。 燃烧控制系统提供对燃烧事件的主动反馈控制，并且包括传感器，例如。 压力传感器，用于检测指示燃烧历史的发动机运行状态，例如， 燃烧开始，并产生相关联的发动机运转状态信号。 处理器接收信号并根据发动机工作条件信号产生控制信号，用于控制各种发动机部件以控制温度，压力，当量比和/或自燃特性，以便可变地控制未来燃烧事件的燃烧历史以达到稳定 ，每个气缸中的低排放燃烧和气缸之间的燃烧平衡。

公开(公告)号：US06684852B2

公开(公告)日：2004-02-03

申请号：US09850405

申请日：2001-05-08

Applicant: John F. Wright ,  Patrick M. Pierz ,  Axel O. zur Loye

Inventor： John F. Wright ,  Patrick M. Pierz ,  Axel O. zur Loye

IPC: F02B700

CPC classification number: F02D13/0203 ,  F01N3/28 ,  F02B1/04 ,  F02B1/12 ,  F02B3/06 ,  F02B17/005 ,  F02B23/0672 ,  F02B29/0406 ,  F02B29/0418 ,  F02B37/18 ,  F02B37/22 ,  F02B69/00 ,  F02B2075/125 ,  F02D9/04 ,  F02D13/0215 ,  F02D13/0234 ,  F02D13/0269 ,  F02D15/04 ,  F02D19/061 ,  F02D19/0631 ,  F02D19/0647 ,  F02D19/0689 ,  F02D19/0692 ,  F02D19/081 ,  F02D19/105 ,  F02D35/02 ,  F02D35/022 ,  F02D35/023 ,  F02D35/025 ,  F02D35/028 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/3035 ,  F02D41/3064 ,  F02D41/3094 ,  F02D41/40 ,  F02D41/401 ,  F02D41/402 ,  F02D41/403 ,  F02D41/405 ,  F02D2041/389 ,  F02D2250/18 ,  F02M26/01 ,  F02M26/05 ,  F02M26/10 ,  F02M43/00 ,  F02M45/02 ,  F02M69/044 ,  F02M69/045 ,  F02M69/046 ,  F02N11/04 ,  Y02T10/123 ,  Y02T10/125 ,  Y02T10/128 ,  Y02T10/142 ,  Y02T10/144 ,  Y02T10/36 ,  Y02T10/42 ,  Y02T10/44

Abstract: A method and internal combustion engine operable in a premixed charge compression ignition mode, comprising a combustion chamber, an intake system for delivering intake air, a mixing device that mixes a first fuel with the intake air to provide a premixed charge of air and the first fuel, a direct fuel injector adapted to directly inject a second fuel into the combustion chamber, and a control system adapted to control the direct fuel injector in a manner to provide a post-ignition injection where the second fuel is directly injected into the combustion chamber after onset of ignition of the premixed charge in the combustion chamber. The second fuel is preferably injected into the combustion chamber during combustion of the premixed charge and/or shortly after combustion of the premixed charge in the combustion chamber.

Abstract translation: 一种以预混合充气压缩点火模式操作的方法和内燃机，包括燃烧室，用于输送进气的进气系统，混合装置，其将第一燃料与进气混合以提供空气预混料，第一 燃料，适于将第二燃料直接喷射到燃烧室中的直​​接燃料喷射器，以及适于以提供点火后喷射的方式控制直接燃料喷射器的控制系统，其中第二燃料直接喷射到燃烧室 在燃烧室中的预混合装料点火之后。 第二燃料优选地在预混合装料的燃烧期间和/或在燃烧室中的预混合燃料燃烧后不久被喷射到燃烧室中。

公开(公告)号：US06276334B1

公开(公告)日：2001-08-21

申请号：US09255780

申请日：1999-02-23

Applicant: Patrick F. Flynn ,  Gary L. Hunter ,  Axel O. zur Loye ,  Omowoleola C. Akinyemi ,  Russ P. Durrett ,  Greg A. Moore ,  George G. Muntean ,  Lester L. Peters ,  Patrick M. Pierz ,  Julie A. Wagner ,  John F. Wright ,  Jackie M. Yeager

Inventor： Patrick F. Flynn ,  Gary L. Hunter ,  Axel O. zur Loye ,  Omowoleola C. Akinyemi ,  Russ P. Durrett ,  Greg A. Moore ,  George G. Muntean ,  Lester L. Peters ,  Patrick M. Pierz ,  Julie A. Wagner ,  John F. Wright ,  Jackie M. Yeager

IPC: F02M700

CPC classification number: F02D13/0215 ,  F01L1/146 ,  F01L1/181 ,  F01L1/352 ,  F01L9/02 ,  F01L2001/34486 ,  F01P2003/021 ,  F01P2060/02 ,  F02B1/12 ,  F02B1/14 ,  F02B3/06 ,  F02B19/14 ,  F02B29/00 ,  F02B29/0412 ,  F02B29/0418 ,  F02B29/0493 ,  F02B33/443 ,  F02B37/04 ,  F02B37/18 ,  F02B75/02 ,  F02B2075/025 ,  F02B2075/027 ,  F02B2275/32 ,  F02D9/04 ,  F02D13/0203 ,  F02D13/0249 ,  F02D13/0257 ,  F02D13/0265 ,  F02D13/0269 ,  F02D13/0273 ,  F02D13/0276 ,  F02D13/028 ,  F02D15/04 ,  F02D19/0605 ,  F02D19/061 ,  F02D19/0647 ,  F02D19/0649 ,  F02D19/0692 ,  F02D19/08 ,  F02D19/12 ,  F02D35/02 ,  F02D35/023 ,  F02D35/028 ,  F02D41/0025 ,  F02D41/008 ,  F02D41/0085 ,  F02D41/3035 ,  F02D41/3041 ,  F02D41/38 ,  F02D41/403 ,  F02D2041/001 ,  F02D2041/389 ,  F02D2200/0414 ,  F02G2243/24 ,  F02G2250/24 ,  F02M25/00 ,  F02M25/0227 ,  F02M25/028 ,  F02M25/03 ,  F02M26/01 ,  F02M26/07 ,  F02M26/08 ,  F02M26/23 ,  F02M26/33 ,  F02M26/615 ,  F02M31/02 ,  F02M31/042 ,  F02P19/00 ,  Y02T10/12 ,  Y02T10/125 ,  Y02T10/126 ,  Y02T10/128 ,  Y02T10/14 ,  Y02T10/142 ,  Y02T10/144 ,  Y02T10/146 ,  Y02T10/36 ,  Y02T10/42

Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and/or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.

Abstract translation: 提供了预混合充气压缩点火发动机和控制系统，其通过压缩点火有效地启动燃烧并保持稳定的燃烧，同时实现极低的氮氧化物排放，良好的总体效率和可接受的燃烧噪声和气缸压力。 本发动机和控制系统通过控制提供温度控制的某些控制变量的操作来有效地控制燃烧历史，即燃烧发生时间，燃烧速率，燃烧持续时间和/或燃烧完整性 ，压力控制，混合物自燃特性控制和当量比控制。 燃烧控制系统提供对燃烧事件的主动反馈控制，并且包括传感器，例如。 压力传感器，用于检测指示燃烧历史的发动机运行状态，例如， 燃烧开始，并产生相关联的发动机运转状态信号。 处理器接收信号并基于发动机运转状态信号产生控制信号，以控制各种发动机部件，以控制温度，压力，当量比和/或自燃特性，以便可变地控制未来燃烧事件的燃烧历史以达到稳定 ，每个气缸中的低排放燃烧和气缸之间的燃烧平衡。

公开(公告)号：US06684849B2

公开(公告)日：2004-02-03

申请号：US10387579

申请日：2003-03-14

Applicant: Axel O. zur Loye ,  Larry J. Brackney ,  Cariappa M. Chenanda ,  Robert M. Hurst ,  Lester L. Peters ,  Patrick M. Pierz ,  John F. Wright

Inventor： Axel O. zur Loye ,  Larry J. Brackney ,  Cariappa M. Chenanda ,  Robert M. Hurst ,  Lester L. Peters ,  Patrick M. Pierz ,  John F. Wright

IPC: F02B1700

CPC classification number: F02D13/0203 ,  F01N3/28 ,  F02B1/04 ,  F02B1/12 ,  F02B3/06 ,  F02B17/005 ,  F02B23/0672 ,  F02B29/0406 ,  F02B29/0418 ,  F02B37/18 ,  F02B37/22 ,  F02B69/00 ,  F02B2075/125 ,  F02D9/04 ,  F02D13/0215 ,  F02D13/0234 ,  F02D13/0269 ,  F02D15/04 ,  F02D19/061 ,  F02D19/0631 ,  F02D19/0647 ,  F02D19/0689 ,  F02D19/0692 ,  F02D19/081 ,  F02D19/105 ,  F02D35/02 ,  F02D35/022 ,  F02D35/023 ,  F02D35/025 ,  F02D35/028 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/3035 ,  F02D41/3064 ,  F02D41/3094 ,  F02D41/40 ,  F02D41/401 ,  F02D41/402 ,  F02D41/403 ,  F02D41/405 ,  F02D2041/389 ,  F02D2250/18 ,  F02M26/01 ,  F02M26/05 ,  F02M26/10 ,  F02M43/00 ,  F02M45/02 ,  F02M69/044 ,  F02M69/045 ,  F02M69/046 ,  F02N11/04 ,  Y02T10/123 ,  Y02T10/125 ,  Y02T10/128 ,  Y02T10/142 ,  Y02T10/144 ,  Y02T10/36 ,  Y02T10/42 ,  Y02T10/44

Abstract: A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.

Abstract translation: 提供多模式内燃机和操作发动机的方法，其能够基于发动机操作条件以各种模式操作，以提高燃料效率并减少排放。 多模式发动机包括用于允许发动机以柴油模式，均质充气双燃料转换模式，火花点火或液体火花点火模式和/或预混充气压缩点火模式操作的燃料输送系统和控制系统。 控制系统和方法允许发动机操作通过控制一个或多个燃料输送装置或其他发动机部件以有效和有效的方式在各种模式之间传递，以便沿着连续输送路径移动，同时将发动机转矩保持在基本恒定 水平。

公开(公告)号：US06230683B1

公开(公告)日：2001-05-15

申请号：US09456382

申请日：1999-12-08

Applicant: Axel O. zur Loye ,  Omowoleola C. Akinyemi ,  Russ P. Durrett ,  Patrick F. Flynn ,  Gary L. Hunter ,  Greg A. Moore ,  Jackie M. Mudd ,  George G. Muntean ,  Julie A. Wagner ,  John F. Wright

Inventor： Axel O. zur Loye ,  Omowoleola C. Akinyemi ,  Russ P. Durrett ,  Patrick F. Flynn ,  Gary L. Hunter ,  Greg A. Moore ,  Jackie M. Mudd ,  George G. Muntean ,  Julie A. Wagner ,  John F. Wright

IPC: F02B306

CPC classification number: F02D13/028 ,  F02B1/12 ,  F02B3/06 ,  F02B19/14 ,  F02B29/0406 ,  F02B37/04 ,  F02B37/18 ,  F02B2075/025 ,  F02B2275/32 ,  F02D13/0203 ,  F02D13/0215 ,  F02D13/0234 ,  F02D13/0265 ,  F02D13/0269 ,  F02D15/04 ,  F02D19/0605 ,  F02D19/0649 ,  F02D19/0665 ,  F02D19/081 ,  F02D35/023 ,  F02D35/028 ,  F02D41/0025 ,  F02D41/0087 ,  F02D41/3029 ,  F02D41/3035 ,  F02D41/3041 ,  F02D41/3076 ,  F02D41/38 ,  F02D2013/0292 ,  F02M26/01 ,  F02M26/04 ,  F02M26/07 ,  F02M26/08 ,  F02M26/23 ,  F02M26/28 ,  F02M26/33 ,  F02M26/43 ,  F02M31/02 ,  F02M31/20 ,  F02P19/00 ,  Y02T10/12 ,  Y02T10/125 ,  Y02T10/126 ,  Y02T10/128 ,  Y02T10/142 ,  Y02T10/36 ,  Y02T10/42

Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and\or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.

Abstract translation: 提供了预混合充气压缩点火发动机和控制系统，其通过压缩点火有效启动燃烧，并保持稳定的燃烧，同时实现极低的一氧化二氮排放，良好的总体效率和可接受的燃烧噪声和气缸压力。 本发动机和控制系统通过控制提供温度控制的某些控制变量的操作来有效地控制燃烧历史，即燃烧发生时间，燃烧速率，燃烧持续时间和/或燃烧完整性 ，压力控制，混合物自燃特性控制和当量比控制。 燃烧控制系统提供对燃烧事件的主动反馈控制，并且包括传感器，例如， 压力传感器，用于检测指示燃烧历史的发动机运行状态，例如， 燃烧开始，并产生相关联的发动机运转状态信号。 处理器接收信号并根据发动机工作条件信号产生控制信号，用于控制各种发动机部件以控制温度，压力，当量比和/或自燃特性，以便可变地控制未来燃烧事件的燃烧历史以达到稳定 ，每个气缸中的低排放燃烧和气缸之间的燃烧平衡。

公开(公告)号：US20210404399A1

公开(公告)日：2021-12-30

申请号：US17473631

申请日：2021-09-13

Applicant: Axel O. zur Loye ,  Christopher Pollitt ,  Timothy O. Lutz

Inventor： Axel O. zur Loye ,  Christopher Pollitt ,  Timothy O. Lutz

IPC: F02D41/14 ,  F02D41/00 ,  F02D23/00 ,  F02D19/06 ,  F02B37/18 ,  F02D41/24

Abstract: Methods and systems of controlling a dual fuel engine with at least two banks of cylinders are provided. The method may include sensing at least one of temperatures of exhaust from the at least two banks and a pressure of an intake manifold of the at least two banks, and adjusting at least one of a gas flow, a charge flow, or an air flow to one of the at least two banks to balance one of exhaust temperatures of the at least two banks and intake manifold pressures of the at least two banks.

公开(公告)号：US20120204542A1

公开(公告)日：2012-08-16

申请号：US13271626

申请日：2011-10-12

Applicant: Colin L. NORRIS ,  Richard J. ANCIMER ,  Axel O. zur LOYE ,  Randy W. NELSON ,  Gary Charles SALEMME ,  Ousmane GUEYE ,  John Franklin WRIGHT

Inventor： Colin L. NORRIS ,  Richard J. ANCIMER ,  Axel O. zur LOYE ,  Randy W. NELSON ,  Gary Charles SALEMME ,  Ousmane GUEYE ,  John Franklin WRIGHT

IPC: F01N3/20

CPC classification number: F01N13/011 ,  F01N3/2066 ,  F01N9/00 ,  F01N13/087 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs.

Abstract translation: 用于处理来自内燃机的排气的排气后处理系统及相关方法允许独立地控制通过排气后处理系统的多个排气支路的排气流。 排气流的独立控制是通过基于由沿着至少一个排气支路定位的流量测量装置产生的信号的值来调节位于每个排气支路中的阀来进行的。 可以调整阀门以迫使排气腿中的目标流动，排气腿之间的相对流动，排气腿中的排气温度，排气背压和/或排气腿内的不平衡。

公开(公告)号：US06243641B1

公开(公告)日：2001-06-05

申请号：US09174548

申请日：1998-10-19

Applicant: Eric B. Andrews ,  Axel O. zur Loye ,  Mark R. Stepper

Inventor： Eric B. Andrews ,  Axel O. zur Loye ,  Mark R. Stepper

IPC: G01M1500

CPC classification number: G01M15/09 ,  F02D41/1448 ,  F02D41/30 ,  F02D2200/021 ,  F02D2200/0614 ,  F02D2200/101 ,  F02D2200/1015 ,  G01M15/08 ,  G01M15/106 ,  G01M15/11

Abstract: A system and method in which the exhaust manifold pressure is measured by a single gauge-type pressure sensor positioned in the exhaust manifold to detect misfires in all cylinders of an internal combustion engine. The pressure sensor detects the exhaust manifold pressure and feeds a signal to a microcomputer via an analog-to-digital converter. A data processing device monitors the pressure waveform created by the data from the sensor to determine if a full or partial misfire occurs. If a cylinder suffers from a partial or complete misfire, the strength of the pressure pulse for that cylinder will be reduced, thus, allowing the data processing device to identify the misfire. The data processing device may determine a misfire by computing an average peak pressure for each combustion cycle, a pressure threshold as a function of engine speed and fuel consumption rate, and a minimum pressure value based on the difference between the average peak pressure and the pressure threshold. The data processing device may alternatively determine a misfire by first computing a coefficient of variation between an observed pressure pulse and the average peak pressure and then comparing the coefficient of variation with a pressure threshold to determine if at least a partial misfire has occurred.

Abstract translation: 一种系统和方法，其中排气歧管压力由位于排气歧管中的单个量规式压力传感器测量，以检测内燃机的所有气缸中的失火。 压力传感器检测排气歧管压力，并通过模数转换器将信号馈送到微型计算机。 数据处理装置监视由传感器的数据产生的压力波形，以确定是否发生全部或部分失火。 如果气缸遭受部分或完全失火，则该气缸的压力脉冲的强度将会降低，从而允许数据处理设备识别失火。 数据处理装置可以通过计算每个燃烧循环的平均峰值压力，作为发动机转速和燃料消耗率的函数的压力阈值以及基于平均峰值压力和压力之间的差的最小压力值来确定失火 阈。 备选地，数据处理装置可以通过首先计算观察到的压力脉冲和平均峰值压力之间的变化系数，然后将变化系数与压力阈值进行比较来确定失火，以确定是否发生了至少部分失火。