公开(公告)号：US3965221A

公开(公告)日：1976-06-22

申请号：US485518

申请日：1974-07-03

Applicant: Robert D. Englert ,  Lester Porter Berriman ,  Kenneth P. Armstrong ,  Douglas A. Roe

Inventor： Robert D. Englert ,  Lester Porter Berriman ,  Kenneth P. Armstrong ,  Douglas A. Roe

IPC: F02M9/12 ,  F02M7/16 ,  F02M9/10 ,  F02M19/04 ,  F23N1/02 ,  F02M7/20

CPC classification number: F02M9/103 ,  F02M7/16 ,  Y10S261/38 ,  Y10S261/56 ,  Y10S261/60 ,  Y10S261/78

Abstract: A combustible air-liquid fuel mixture having a substantially constant air-to-fuel ratio is produced for delivery to the intake manifold of an engine. Air is passed through a fluid flow device having a variable area throat zone to increase the velocity of the air to sonic, and the area of the throat zone is varied in correlation with operating demands imposed upon the engine for which the mixture is produced. Liquid fuel is metered from a supply into the air stream at or before the throat zone in direct proportion to the cross-sectional area of the throat zone. The pressure of the high velocity air stream is sensed at a point where it bears a predictable relationship to atmospheric pressure, and the rate of fuel delivered into the air stream is adjusted in response to changes in the air pressure sensed so that the air-to-fuel ratio of the mixture is maintained substantially constant. Due to the particular design of the fluid flow device, air at sonic velocity passes through the throat zone over substantially the entire operating range of the engine down to low manifold vacuum levels. During the relatively brief subsonic mode of operation when the manifold vacuum levels are quite low, the fluid flow device functions as a metering venturi to introduce the liquid fuel into the varying velocity air stream.

Abstract translation: 产生具有基本上恒定的空气 - 燃料比的可燃空气 - 液体燃料混合物，用于输送到发动机的进气歧管。 空气通过具有可变面积喉部区域的流体流动装置，以将空气的速度增加到声音，并且与产生混合物的发动机的操作要求相关，改变了喉部区域的面积。 液体燃料从喉部区域的横截面积成正比地从喉部区域中或之前的供应流量计量。 感测到高速空气流的压力在其与大气压力具有可预测的关系的点处，并且响应于感测的空气压力的变化来调节输送到空气流中的燃料的速率，使得空气到 - 混合物的燃料比保持基本上恒定。 由于流体流动装置的特殊设计，声速的空气在发动机的基本上整个工作范围内通过喉部区域，直到低的歧管真空度。 在歧管真空度相当低的相对短暂的亚音速操作模式期间，流体流动装置用作计量文丘里管，以将液体燃料引入变速气流中。

公开(公告)号：US3949025A

公开(公告)日：1976-04-06

申请号：US430808

申请日：1974-01-04

Applicant: Robert Dixon Englert ,  Kenneth Ronald Armstrong ,  Lester Porter Berriman

Inventor： Robert Dixon Englert ,  Kenneth Ronald Armstrong ,  Lester Porter Berriman

IPC: F02D33/00 ,  F02B1/04 ,  F02M9/10 ,  F02M9/12 ,  F02M19/08 ,  F02M9/06

CPC classification number: F02M9/103 ,  F02M19/081 ,  F02B1/04 ,  Y10S261/56 ,  Y10S261/58

Abstract: Discharge velocity of the air-fuel mixture being supplied through a variable venturi flow passage device to an internal combustion engine at idle to near idle operation of the engine is optimized by controllably varying the area ratio between the throat and exit planes of the device. Opposite jaw faces of the device define the flow passage that is gradually opened and closed in correlation to demand imposed on the engine between idle and full throttle operation. Area ratio control in one form is achieved by apparatus operative to selectively vary the diffuser angle between the opposing jaw faces. Area ratio control in another form is achieved by apparatus operative to effect a localized passage opening at idle of selectively different aspect ratio than the aspect ratio defined over the full longitudinal extent of the jaw faces.

Abstract translation: 通过可变文丘里流道装置将空气燃料混合物的排出速度通过可控地改变装置的喉部和出口平面之间的面积比来优化，该空燃混合物通过可变文丘里流道装置在怠速到接近怠速运转的情况下被供给到内燃机。 装置的相对的颚面限定了与在空转和全油门操作之间施加在发动机上的需求相关的逐渐打开和关闭的流动通道。 一种形式的面积比控制通过可操作地选择性地改变相对的夹爪面之间的扩散器角度的装置来实现。 另一种形式的面积比率控制是通过可操作地实现与颚面的整个纵向范围限定的纵横比有选择地不同的纵横比的空闲的局部通道开口的装置来实现的。