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Gaseous fuel mixer with exhaust gas recirculation

A gas fuel, recirculation technology, used in exhaust gas recirculation, fuel air intake, combustion air/combustion-air treatment, etc.

Active Publication Date: 2017-12-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to meet the needs of many different engines with varying displacement, performance, etc., a large number of specialized parts are required

Method used

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  • Gaseous fuel mixer with exhaust gas recirculation
  • Gaseous fuel mixer with exhaust gas recirculation
  • Gaseous fuel mixer with exhaust gas recirculation

Examples

Experimental program
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Embodiment Construction

[0021] Figure 1-Figure 4 Illustrated is a mixing device 14 for introducing a gaseous fuel (eg, compressed natural gas) into an intake airflow of an internal combustion engine. The mixing device 14 is positioned along an intake of the engine defined at least in part by an intake passage 18 passing through the mixing device 14 . The mixing device 14 includes a body 22 having a generally cylindrical opening extending along a central axis A and which interchangeably accepts various components, as described in further detail below.

[0022] refer to Figure 4 , the body 22 includes a primary gaseous fuel inlet 26 disposed radially outwardly from the intake passage 18 . A throttle body inlet adapter 34 is received by the upstream end of the main body 22 . The main body's main gaseous fuel inlet 26 is connected to a gaseous fuel supply through a fuel inlet stem 30 of a throttle body inlet adapter 34 (eg, through various fittings, fuel lines, etc.). A fuel inlet rod 30 is fluidly...

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PUM

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Abstract

A mixing device for introducing gaseous fuel and recirculated exhaust gas into an intake passage of an engine, the mixing device including a body (322), an annular channel (54), the body (322) defining a fuel inlet opening (170), and a plurality of gaseous fuel injectors (94) fluidly coupled to the fuel inlet opening (170) such that gaseous fuel from the plurality of gaseous fuel injectors (94) is conveyed into the annular channel (54) through the fuel inlet opening (170). The mixing device further includes a diffuser (50) at a position of the annular channel (54) to diffuse gaseous fuel from the annular channel (54) into the intake airflow in the intake passage, an exhaust gas recirculation (EGR) inlet opening (400) defined by the body (322) and in fluid communication with the intake passage, and an exhaust gas recirculation supply pipe (470) coupled to the EGR inlet opening (400) and configured to direct recirculated exhaust gas from the engine into the intake passage.

Description

Background technique [0001] The present invention relates to a gas mixer for introducing gaseous fuel (ie, fuel that exists naturally in a gaseous state rather than a liquid state) and recirculated exhaust gas into the intake passage of an internal combustion engine (eg, in a passenger vehicle). Gaseous fuels include natural gas (mainly methane) and its derivatives (such as butane and propane), but exclude gasoline. [0002] Natural gas can be used to power internal combustion engines. Vehicles running on natural gas are fuel efficient and environmentally friendly compared to conventional engines. They are also capable of delivering good torque and robust performance while outputting less engine noise than conventional diesel-powered engines. However, in order to meet the needs of many different engines with varying displacement, performance, etc., a large number of specialized parts are required. [0003] Modern natural gas engines employ exhaust gas recirculation (EGR) to...

Claims

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Application Information

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IPC IPC(8): F02M21/04F02M35/10F02M26/19
CPCF02M21/04F02M21/042F02M21/047F02M35/10216F02M35/10222F02M26/19F02M21/0278Y02T10/30
Inventor M.埃尔-加马尔T.赫尔泽尔P.W.施瓦克J.克恩
Owner ROBERT BOSCH GMBH