[go: up one dir, main page]

WO1997045634A1 - Evaporateurs de carburant - Google Patents

Evaporateurs de carburant Download PDF

Info

Publication number
WO1997045634A1
WO1997045634A1 PCT/GB1997/001416 GB9701416W WO9745634A1 WO 1997045634 A1 WO1997045634 A1 WO 1997045634A1 GB 9701416 W GB9701416 W GB 9701416W WO 9745634 A1 WO9745634 A1 WO 9745634A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
air flow
evaporator
air
evaporation surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1997/001416
Other languages
English (en)
Inventor
John Rendell Conrad Pedersen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU29104/97A priority Critical patent/AU2910497A/en
Publication of WO1997045634A1 publication Critical patent/WO1997045634A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/18—Other surface carburettors
    • F02M17/26—Other surface carburettors with other wetted bodies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • This invention relates to evaporators for vaporisation of fuel into an air flow and
  • oxides (NOx) in engine exhausts is increased by the presence of non-uniformities of fuel
  • Nitrogen oxides are among the unwanted and legally
  • concentration responsible for production of nitrogen oxides can be on a small spatial
  • the mechanism is dependent on the spatial variation of fuel concentration within the
  • reaction zone would be expected to be slightly thicker, since
  • Sauter mean diameter the diameter of a
  • evaporator consisting of a stack of plates which are spaced apart so as to define narrow
  • Figure 1 is a vertical section through an evaporator in accordance with the
  • Figure 2 is a horizontal section through the evaporator of Figure 1;
  • FIG. 3 is a detail of Figure 1
  • Figure 4 is a vertical section through part of a further evaporator in accordance
  • FIGS. 8 and 9 are vertical sections through further evaporators in accordance
  • the evaporator 1 comprises an evaporator matrix
  • fuel metering means 3 for supplying metered fuel to an air flow in the form of fuel droplets, and air flow means in the form of a duct
  • the fuel can be delivered to the air flow
  • the fuel can be boiled to a vapour which is then introduced into the air
  • the gas consists wholly of fuel vapour at the surface of the
  • the gas consists of air with a concentration of
  • stages occupy a finite period of time which depends on the temperature and pressure of
  • the evaporator matrix 2 is designed to capture at least a proportion of
  • the droplets are carried, to undergo an abrupt change, or many abrupt changes, in flow
  • matrix 2 can be made to cause even quite small droplets to impact on the surface of the
  • uniformity of fuel concentration is less at low load.
  • the evaporator matrix In a non-illustrated embodiment of the invention, the evaporator matrix
  • the filter pores are graded so that the pores are of decreasing size
  • the filter can, for
  • reticulated foam pad which may comprise layers of different pore
  • the reticulated foam filter can be produced from a polyurethane foam by passing
  • a metal such as nickel
  • the evaporator matrix 2 comprises, within a flow duct 10, a stack 1 1 of generally parallel
  • metal plates 12 of a typical thickness of 0.25mm spaced apart by spacers (not shown)
  • Inlet portions 15 of the plates 12 are staggered relative to one another and
  • the evaporator 1 of Figures 1 and 2 is shown inco ⁇ orated in a fuel metering
  • the evaporator 1 has a drain point 20
  • Figure 4 shows a variant of such an evaporator matrix for increasing the
  • each passage 22 changes there is an abrupt change in the direction of air flow, and this
  • passages 22 are defined by layers 24 of filter
  • the evaporator matrix comprises a stack of generally parallel
  • secondary vortices 34 are produced in the gas whose axes are streamwise and whose
  • d is the plate spacing
  • v is the mean duct velocity
  • v is the kinematic viscosity
  • FIG. 8 shows a further embodiment of the invention in which the evaporator
  • 1' comprises a rectangular duct 4' which is divided into two air flow conduits 40 and 41
  • air mixing zone 44 is high at low loads but is reduced progressively in the upper part of
  • FIG. 9 shows a further embodiment of the invention in which the evaporator
  • the throttle 52 consists of two pressure-
  • the plates 53 and 54 are hinged near their centre and form variable chambers with
  • vent holes 56 in the duct 55 are vented to upstream pressure by vent holes 56 in the duct 55.
  • variable chamber is closed off by virtue of the fact that the end of each throttle plate 53
  • the matrix 2 1 or 2" may comprise
  • the heater 58 may be provided within a
  • evaporator matrix is chosen so that the time taken for the air to pass through the matrix
  • D is the vapour diffusivity in air (length 2 /time)
  • h is a typical dimension of the matrix transverse to the air flow, such as plate-to-
  • the time is given by (free volume/volume flow rate).
  • the shape and size of the evaporator matrix for any application is a compromise
  • evaporator structure allows less volume or lower temperature, but increases the pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)

Abstract

Un système de dosage de carburateur incorpore un évaporateur (1) servant à vaporiser du carburant dans un flux d'air. Cet évaporateur (1) comprend une matrice d'évaporation (2) possédant une surface d'évaporation allongée, deux gicleurs (6) servant à alimenter la matrice (2) en carburant, de façon à capturer des gouttelettes de carburant au niveau d'une pluralité d'emplacements répartis au-dessus de la surface d'évaporation, ainsi qu'un conduit d'air (4) servant à faire circuler de l'air au-dessus de la surface d'évaporation, ce qui provoque l'évaporation des gouttelettes dans le flux d'air. Quand on l'utilise dans un moteur à essence, ce carburateur provoque l'évaporation d'une quantité suffisante de carburant de manière suffisamment précoce dans le processus d'induction, de sorte que tout reste de variation spatiale de concentration de carburant dans le mélange air-carburant est limité et présente une échelle spatiale suffisante pour ne pas favoriser la génération d'oxyde d'azote, au moins dans des conditions de fonctionnement avec une charge plus élevée.
PCT/GB1997/001416 1996-05-25 1997-05-23 Evaporateurs de carburant Ceased WO1997045634A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29104/97A AU2910497A (en) 1996-05-25 1997-05-23 Fuel evaporators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9611030.9 1996-05-25
GBGB9611030.9A GB9611030D0 (en) 1996-05-25 1996-05-25 Fuel evaporators

Publications (1)

Publication Number Publication Date
WO1997045634A1 true WO1997045634A1 (fr) 1997-12-04

Family

ID=10794347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001416 Ceased WO1997045634A1 (fr) 1996-05-25 1997-05-23 Evaporateurs de carburant

Country Status (3)

Country Link
AU (1) AU2910497A (fr)
GB (1) GB9611030D0 (fr)
WO (1) WO1997045634A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR428672A (fr) * 1911-04-19 1911-09-05 William Riley Mckeen Junior Carburateur
GB319526A (en) * 1928-10-25 1929-09-26 Arno Boerner Improvements in carburettors for internal combustion engines
US4031874A (en) * 1975-10-08 1977-06-28 Alwine John E Carburetor
US4350134A (en) * 1980-04-07 1982-09-21 Sparks William D Method and apparatus for producing an air/fuel vapor mixture
DE4240470A1 (en) * 1991-12-13 1993-06-17 Volkswagen Ag IC engine with improved carburation - has heated insert body with flow-parallel channels, behind each injection valve set at angle to flow direction of valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR428672A (fr) * 1911-04-19 1911-09-05 William Riley Mckeen Junior Carburateur
GB319526A (en) * 1928-10-25 1929-09-26 Arno Boerner Improvements in carburettors for internal combustion engines
US4031874A (en) * 1975-10-08 1977-06-28 Alwine John E Carburetor
US4350134A (en) * 1980-04-07 1982-09-21 Sparks William D Method and apparatus for producing an air/fuel vapor mixture
DE4240470A1 (en) * 1991-12-13 1993-06-17 Volkswagen Ag IC engine with improved carburation - has heated insert body with flow-parallel channels, behind each injection valve set at angle to flow direction of valve

Also Published As

Publication number Publication date
GB9611030D0 (en) 1996-07-31
AU2910497A (en) 1998-01-05

Similar Documents

Publication Publication Date Title
US4327698A (en) Exhaust gas recirculating device
JP4368112B2 (ja) 燃焼室用の、液体燃料を空気流れ中に噴射する装置および方法
US6612293B2 (en) Exhaust gas recirculation cooler
US4318386A (en) Vortex fuel air mixer
US11952931B2 (en) Exhaust emission control device, internal combustion engine equipped therewith and method for exhaust emission control
KR100497635B1 (ko) 연료기화장치, 촉매연소장치
CN100436806C (zh) 在起动期间清洗来自燃料喷射器的燃料的系统和方法
CZ20011398A3 (cs) Zařízení na směšování paliva se vzduchem
CN1279189C (zh) 行进中产品特别是板材的借助化石燃料的间接加热装置
US20150159590A1 (en) Recirculated Exhaust Gases Distribution Device, Corresponding Inlet Manifold And Corresponding Inlet Module
CN108661828A (zh) 具有废气再循环（egr）冷却器的发动机
CN1788147B (zh) 满足二级机车排放规程的气缸内燃烧方法
WO1997045634A1 (fr) Evaporateurs de carburant
CN202328231U (zh) 一种用于裂解炉底部的低氮氧化物排放的气体燃烧器
US3587541A (en) Engine exhaust recirculation
US4318887A (en) Heat exchange afterburner and muffler apparatus for engine exhaust gases
US8555627B2 (en) Exhaust gas line of an internal combustion engine
Woo et al. An experimental study on removal of exhaust gas recirculation cooler fouling using washer fluid steam
GB2428465A (en) A system for dispensing EGR in a reciprocating internal combustion engine
US3524734A (en) Device for promoting perfect combustion of liquefied petroleum gas for use in cars
US3626913A (en) Exhaust velocity control of exhaust recycling
JP3617063B2 (ja) ガス給湯器
US5680839A (en) Apparatus and method of delivering a fuel and air mixture for internal combustion engines
KR101227178B1 (ko) 디젤엔진시스템의 배기가스 재순환장치에서의 응축수 제거구조 및 그 방법
JP2002048307A (ja) 燃焼式加熱装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN YU AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97541831

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase