1、BSI Standards PublicationBS ISO 7967-11:2014Reciprocating internalcombustion engines Vocabulary of components andsystemsPart 11: Fuel systemsBS ISO 7967-11:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 7967-11:2014.The UK participation in its preparation
2、 was entrusted to TechnicalCommittee MCE/14, RIC engines.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The Brit
3、ish Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 80805 0ICS 01.040.27; 27.020Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31
4、 December 2014.Amendments issued since publicationDate Text affectedBS ISO 7967-11:2014 ISO 2014Reciprocating internal combustion engines Vocabulary of components and systems Part 11: Fuel systemsMoteurs alternatifs combustion interne Vocabulaire des composants et des systmes Partie 11: Systmes de c
5、arburantINTERNATIONAL STANDARDISO7967-11First edition2014-12-15Reference numberISO 7967-11:2014(E)BS ISO 7967-11:2014ISO 7967-11:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced o
6、r utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO co
7、pyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 7967-11:2014ISO 7967-11:2014(E)Contents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 13.1 Fuel supply system 1
8、3.2 Carburetor . 23.3 Fuel injection system . 9Bibliography .22 ISO 2014 All rights reserved iiiBS ISO 7967-11:2014ISO 7967-11:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Int
9、ernational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison w
10、ith ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directive
11、s, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of
12、 the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declaration
13、s received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about IS
14、Os adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information .The committee responsible for this document is ISO/TC 70, Internal combustion engines.ISO 7967 consists of the following parts, under the general title Reciprocatin
15、g internal combustion engines Vocabulary of components and systems: Part 1: Structure and external covers Part 2: Main running gear Part 3: Valves, camshaft drives and actuating mechanisms Part 4: Pressure charging and air/exhaust gas ducting systems Part 5: Cooling systems Part 6: Lubricating syste
16、ms Part 7: Governing systems Part 8: Starting systems Part 9: Control and monitoring systems Part 10: Ignition systems Part 11: Fuel systems Part 12: Exhaust emission control systemsiv ISO 2014 All rights reservedBS ISO 7967-11:2014Reciprocating internal combustion engines Vocabulary of components a
17、nd systems Part 11: Fuel systems1 ScopeThis part of ISO 7967 establishes a vocabulary for fuel systems of reciprocating internal combustion engines. Also, in this part of ISO 7967, the terms and the definitions are classified as follows: fuel supply system (3.1); carburetor (3.2); fuel injection sys
18、tem (3.3).ISO 2710-1 gives a classification of reciprocating internal combustion engines and denotes the basic terms and definitions of such engines and their characteristics.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indis
19、pensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7876-1:1990, Fuel injection equipment Vocabulary Part 1: Fuel injection pumpsISO 7876-3:1993, Fuel injectio
20、n equipment Vocabulary Part 3: Unit injectorsISO 7876-5, Fuel injection equipment Vocabulary Part 5: Common rail fuel injection system3 Terms and definitions3.1 Fuel supply system3.1.1fuel supply systemsystem which consists of low pressure fuel equipment for delivering fuel from the fuel tank to the
21、 high pressure unit for fuel injection to the engine3.1.2fuel feed pumplow pressure pump delivering fuel from the tank through one or several filters, to the high-pressure-generating componentsSOURCE: ISO 7876-5:2004, 2.23.1.3fuel filterfilter to eliminate contamination in the fuelINTERNATIONAL STAN
22、DARD ISO 7967-11:2014(E) ISO 2014 All rights reserved 1BS ISO 7967-11:2014ISO 7967-11:2014(E)3.1.4priming pumppump to fill the fuel pipe at starting3.2 Carburetor3.2.1carburetordevice which vaporizes fuel into charge air and also controls air-fuel ratio of the mixture3.2.2elementary carburetorcarbur
23、etor (3.2.1) without compensation device which consists of the main system, the float unit, the venturi (3.2.34), and the throttle valve (3.2.42)3.2.3float carburetorcarburetor (3.2.1) in which the fuel level is maintained at the constant level by the float (3.2.47) and the fuel is absorbed in the a
24、ir by the vacuum pressure at the venturi (3.2.34)3.2.4electronic controlled carburetorcarburetor (3.2.1) which controls air-fuel ratio by the electronic circuit3.2.5air-fuel ratio feedback controlled carburetorcarburetor (3.2.1) which is equipped with the device for feedback control of air-fuel rati
25、o3.2.6fixed-venturi carburetorcarburetor (3.2.1) with fixed area venturi3.2.7variable venturi carburetorcarburetor (3.2.1) with variable area venturi3.2.8updraft carburetorcarburetor (3.2.1) with upward exit of air-fuel mixture3.2.9downdraft carburetorcarburetor (3.2.1) with downward exit of air-fue
26、l mixture3.2.10horizontal carburetorsidedraft carburetorcarburetor (3.2.1) with horizontal exit of air-fuel mixture3.2.11single-barrel carburetorcarburetor (3.2.1) with one set of venturi (3.2.34)3.2.12multi-barrel carburetorcarburetor (3.2.1) with more than two sets of venturi (3.2.34)3.2.13two-bar
27、rel carburetorcarburetor (3.2.1) with two sets of venturi (3.2.34)2 ISO 2014 All rights reservedBS ISO 7967-11:2014ISO 7967-11:2014(E)3.2.14compound carburetormultiple carburetormulti-carburetorcarburetor system with more than two sets of independent carburetors (3.2.1) in which throttle valves (3.2
28、.42) are linked so as to work simultaneously or in sequenceNote 1 to entry: The unit with two carburetors is called twin-carburetor.3.2.15two-stage carburetorcarburetor system with two carburetors (3.2.1) with different characteristics in which each throttle valve (3.2.42) works in sequenceNote 1 to
29、 entry: The carburetor which works first is called the primary carburetor and another is called the secondary carburetor.3.2.16float circuitfloat systemmechanism which maintains the level of fuel in the carburetor (3.2.1)3.2.17main metering systemmain circuithigh-speed systemhigh-speed circuitcircui
30、t in the carburetor (3.2.1) where fuel flows continuously during normal engine operation, except idling3.2.18slow speed systemidle systemidle circuitcircuit in the carburetor (3.2.1) where fuel flows at idling3.2.19secondary idle systemsecondary low speed systemcircuit of the secondary carburetor (3
31、.2.1) where fuel flows from the main fuel circuit when the opening of the throttle valve (3.2.42) is small3.2.20power systemfull-power circuitpower enrichment systemcircuit where additional fuel flows for the enrichment of air-fuel mixture at high power operation of the engine3.2.21starting systemch
32、oke systemsystem or a series of parts in the carburetor (3.2.1) which restricts the air flow in the venturi (3.2.34) at the starting of the engine3.2.22accelerating systemaccelerator-pump systemcircuit of additional fuel for the enrichment of air-fuel mixture at the sudden acceleration of the engine
33、 ISO 2014 All rights reserved 3BS ISO 7967-11:2014ISO 7967-11:2014(E)3.2.23compensating devicedevice which adjusts air-fuel ratio in accordance with the requirement from the engine using a procedure such as air bleed (3.2.53) method3.2.24bore size of throttle-body flangethrottle-diameterdiameter of
34、the exit of the carburetor (3.2.1) which indicates the size of the carburetorNote 1 to entry: When the carburetor has two or more exits, the size is usually indicated by plural diameters.3.2.25carburetor bodymain body of carburetorbody including main parts of the carburetor (3.2.1) such as venturi (
35、3.2.34) and float chamber (3.2.44)3.2.26air intake bodybody which forms air intake (3.2.28) passage with the choke valve (3.2.31)3.2.27flange bodythrottle bodybody which forms the exit of air passage with throttle valve (3.2.42)3.2.28air hornair intakeair intake portion of the carburetor (3.2.1)3.2.
36、30chokechokingmeans to enrich the air-fuel mixture by choking the inlet of charge air to the carburetor (3.2.1)3.2.31choke valvestrangler valveair shuttervalve for choking (3.2.30) the air inlet in the carburetor (3.2.1)3.2.32choke relief valvevalve equipped in the choke valve (3.2.31) which relieve
37、s charge air when air-fuel ratio exceeds the limit due to excessive negative pressure at the venturi (3.2.34)3.2.33automatic chokedevice which operates choke valve (3.2.31) automatically depending on the temperature of the engine3.2.34venturiventuri tubenozzle (3.2.64) with throat which produces low
38、 pressure of charge air for fuel injection3.2.35venturi diameterdiameter of throat of venturi (3.2.34)4 ISO 2014 All rights reservedBS ISO 7967-11:2014ISO 7967-11:2014(E)3.2.36single venturiventuri (3.2.34) of one part3.2.37double venturiunified venturi (3.2.34) from two venturis3.2.38triple venturi
39、unified venturi (3.2.34) from three venturis3.2.39primary venturismallest venturi (3.2.34) of double venturi (3.2.37) or triple venturi (3.2.38)3.2.40secondary venturiventuri (3.2.34) larger than primary venturi (3.2.39) in double venturi (3.2.37) or triple venturi (3.2.38)3.2.41third venturilargest
40、 venturi (3.2.34) of triple venturi (3.2.38)3.2.42throttle valvethrottle butterflypart included in the carburetor (3.2.1) which controls the flow rate of air-fuel mixture into the engine3.2.43air valveair damperdamper which is equipped in the second stage of two-barrel carburetor (3.2.13) for the co
41、ntrol of air-fuel mixture3.2.44float chamberfloat bowlchamber containing fuel with the float (3.2.47) which maintains the fuel level3.2.45float chamber ventpipe or hole (3.2.67) to introduce air pressure into the upper space of the float chamber (3.2.44)3.2.46outer ventfloat chamber vent (3.2.45) co
42、nnected to the atmosphere3.2.47floatpontoonpart to maintain the level of fuel in the float chamber (3.2.44)3.2.48float valvefloat needle valvevalve which detects the movement of the float (3.2.47) and controls the level of fuel in the float chamber (3.2.44) ISO 2014 All rights reserved 5BS ISO 7967-
43、11:2014ISO 7967-11:2014(E)3.2.49float-level heightdistance of upper or lower surface of the float (3.2.47) from a certain reference surface of the float chamber (3.2.44)3.2.50fuel-level heightlevel of fuel measured from a certain reference surface of the float chamber (3.2.44)3.2.51jetmetering jetme
44、tering orificeorifice used in the carburetor (3.2.1) which controls fuel flow or air flow3.2.52fuel jetpetrol jetfuel metering jetjet (3.2.51) which controls the fuel flow3.2.53air jetair bleedwell vent jetjet (3.2.51) which controls bleed air flow3.2.54needle jetjet (3.2.51) with jet needle (3.2.55
45、)3.2.55jet needlefine bar installed in the hole (3.2.67) of a jet (3.2.51) to control the passage area of the fluid3.2.56main jetmain-metering jetjet (3.2.51) for the main metering system (3.2.17)3.2.57slow running jetslow speed jetidling jetjet (3.2.51) for slow speed system (3.2.18)3.2.58secondary
46、 slow jetjet (3.2.51) for secondary idle system (3.2.19)3.2.59power by-pass jetpower jetjet (3.2.51) for power system (3.2.20)3.2.60power valvepower jet valvevalve to control the fuel flow of the power system (3.2.20)6 ISO 2014 All rights reservedBS ISO 7967-11:2014ISO 7967-11:2014(E)3.2.61pump jeta
47、ccelerating pump jetjet (3.2.51) in the accelerating system (3.2.22)3.2.62starting petrol jetjet (3.2.51) for starting system (3.2.21)3.2.63main air bleedmain air jetjet (3.2.51) which bleeds air from the main metering system (3.2.17)3.2.64nozzledischarge jetdischarge tubenozzle to discharge fuel in
48、to charge air flow3.2.65main nozzlemain discharge nozzlenozzle (3.2.64) in the main metering system3.2.66pump discharge nozzlenozzle (3.2.64) in the accelerating system (3.2.22)3.2.67portholehole (3.2.67) for injecting fuel on the air passage of carburetor (3.2.1)3.2.68idle portidle discharge holepo
49、rt (3.2.67) for slow speed system (3.2.18)3.2.69progression holesecondary idle orificetwo-hole type idle port (3.2.68) located on the upper side of the air passage3.2.70primary idle orificeidle discharge holetwo-hole type idle port (3.2.68) located on the lower side of the air passage3.2.71secondary throttle barrel by-pass holeport (3.2.67) for secondary idle system (3.2.19)3.2.72starting mixture supply portoutlet for starting mixtureport (3.2.67) for starting system (3.2.21)3.2.73starting valvevalve which o
