公开(公告)号：EP0255054A3

公开(公告)日：1989-05-24

申请号：EP87110710.8

申请日：1987-07-23

申请人： AIR SENSORS, INC.

发明人： Smith, David H.

IPC分类号： F02M69/00

CPC分类号： F02M69/46 ,  F02M69/48 ,  G01F1/6842 ,  G01F1/69 ,  G01F5/00

摘要： A throttle body (10) for an internal-combustion engine having a hollow venturi member (32) positioned within the body. The member has a first portion (33) projecting out of the body at its intake end (20), and a second portion (34) positioned generally centrally within the body air duct upstream from a throttle plate (24). The second portion has an exterior surface (36) spaced inward from the body interior sidewall to form an annular venturi passage (38) therebetween. The first and second portions define an enclosed air channel (40). Circumferentially distributed entry openings (42) in the first portion open exterior of the body duct for entry of air into the channel, and circumferentially distributed exit openings (44) in the second portion communicating with the venturi air passage for the exit of air from the channel. The channel and the entry and exit openings define a sample flow path of air from a location exterior of the duct to a location adjacent to the venturi passage representative of the air mass flow through the duct. An anemometer sensor (46) is positioned in the channel in the sample airflow path. The first portion of the venturi member has a bluff body shape (66) to create a low pressure zone thereabout when air through the body duct is reversed to substantially eliminate airflow through the venturi member as a result of engine backflow pulsations.

公开(公告)号：EP0262259B1

公开(公告)日：1994-07-20

申请号：EP86118025.5

申请日：1986-12-23

申请人： AIR SENSORS, INC.

发明人： Miller, Kenneth E. ,  Smith, David H.

IPC分类号： F02D19/02 ,  F02M21/04

CPC分类号： F02M35/10386 ,  F02B43/00 ,  F02D19/023 ,  F02D19/027 ,  F02D19/0613 ,  F02D19/0628 ,  F02D19/0642 ,  F02M21/0239 ,  F02M21/04 ,  Y02T10/32 ,  Y02T10/36 ,  Y10T137/0363 ,  Y10T137/2529

公开(公告)号：EP0262259A1

公开(公告)日：1988-04-06

申请号：EP86118025.5

申请日：1986-12-23

申请人： AIR SENSORS, INC.

发明人： Miller, Kenneth E. ,  Smith, David H.

IPC分类号： F02D19/02 ,  F02M21/04

CPC分类号： F02M35/10386 ,  F02B43/00 ,  F02D19/023 ,  F02D19/027 ,  F02D19/0613 ,  F02D19/0628 ,  F02D19/0642 ,  F02M21/0239 ,  F02M21/04 ,  Y02T10/32 ,  Y02T10/36 ,  Y10T137/0363 ,  Y10T137/2529

摘要： A control system for internal combustion engines, including a first conduit for the flow of intake air, and a second conduit for the flow of natural gas to be mixed with the air for combustion. The flow of the air is variable over a range of mass flow rates during operation of the engine and an air mass sensor is positioned to sense the mass flow rate in the first conduit and generate a first flow rate signal indicating the mass flow rate. A natural gas mass sensor is positioned to sense the mass flow rate of the gas in the second conduit and to generate a second flow rate signal indicating the mass flow rate of the natural gas. The first and second flow rate signals are compared in an electronic controller that generates a control signal if the first and second flow rates vary from a predetermined ratio. The ratio is selected to provide a substantially stoichiometric ratio of air and natural gas. A valve is provided to adjustably control the flow rate of the natural gas in response to the control signal to maintain the preselected ratio. A sensor and shutoff valve are also provided for terminating the flow of the natural gas when its pressure falls below a predetermined pressure, allowing immediate flow of gasoline to the engine, thus assuring smooth, continued operation of the vehicle. A throttle body has a natural gas distribution ring in the throat of the body and provides a curtain flow of gas.

摘要翻译： 一种用于内燃机的控制系统，包括用于进气的流动的第一导管和用于与空气混合以燃烧的天然气流的第二导管。 在发动机运行期间，空气的流动在质量流量范围内是可变的，并且空气质量传感器被定位成感测第一管道中的质量流量，并产生指示质量流量的第一流量信号。 定位天然气质量传感器以感测第二导管中气体的质量流量，并产生指示天然气质量流量的第二流量信号。 如果第一和第二流量从预定比率变化，则在电子控制器中比较第一和第二流量信号，该电子控制器产生控制信号。 选择该比例以提供基本上化学计量比的空气和天然气。 提供阀以响应于控制信号可调节地控制天然气的流量以维持预选比率。 还提供了传感器和截流阀，用于当其压力低于预定压力时终止天然气的流动，从而允许立即将汽油流入发动机，从而确保车辆的平稳持续运行。 节气门体在身体的喉部具有天然气分配环，并提供气体的帘子流。

公开(公告)号：EP0255054A2

公开(公告)日：1988-02-03

申请号：EP87110710.8

申请日：1987-07-23

申请人： AIR SENSORS, INC.

发明人： Smith, David H.

IPC分类号： F02M69/00

CPC分类号： F02M69/46 ,  F02M69/48 ,  G01F1/6842 ,  G01F1/69 ,  G01F5/00

摘要： A throttle body (10) for an internal-combustion engine having a hollow venturi member (32) positioned within the body. The member has a first portion (33) projecting out of the body at its intake end (20), and a second portion (34) positioned generally centrally within the body air duct upstream from a throttle plate (24). The second portion has an exterior surface (36) spaced inward from the body interior sidewall to form an annular venturi passage (38) therebetween. The first and second portions define an enclosed air channel (40). Circumferentially distributed entry openings (42) in the first portion open exterior of the body duct for entry of air into the channel, and circumferentially distributed exit openings (44) in the second portion communicating with the venturi air passage for the exit of air from the channel. The channel and the entry and exit openings define a sample flow path of air from a location exterior of the duct to a location adjacent to the venturi passage representative of the air mass flow through the duct. An anemometer sensor (46) is positioned in the channel in the sample airflow path. The first portion of the venturi member has a bluff body shape (66) to create a low pressure zone thereabout when air through the body duct is reversed to substantially eliminate airflow through the venturi member as a result of engine backflow pulsations.

摘要翻译： 一种用于内燃机的节流阀体（10），其具有定位在阀体内的中空文氏管元件（32）。 该构件具有在其进气端（20）处突出于主体的第一部分（33）和位于主体空气管道大致中央的第二部分（34），其位于节气门板（24）的上游。 第二部分具有从主体内侧壁向内隔开的外表面（36），以在它们之间形成环形文丘里通道（38）。 第一和第二部分限定了封闭的空气通道（40）。 在身体管道的外部的第一部分中的圆周分布的进入开口（42），用于进入空气进入通道，并且在第二部分中的周向分布的出口（44）与文丘里管空气通道连通，用于从 渠道。 通道和入口和出口开口限定了空气从管道外部的位置到靠近文丘里通道的位置的样品流动路径，代表通过管道的空气质量流量。 风速计传感器（46）位于样品气流路径中的通道中。 文丘里管构件的第一部分具有非流线形体（66），以在空气通过体导管相反时形成低压区域，从而基本上消除由于发动机回流脉动而导致文丘里管构件的气流。