1、BSI Standards Publication BS ISO 7967-11:2014 Reciprocating internal combustion engines Vocabulary of components and systems Part 11: Fuel systemsBS ISO 7967-11:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 7967-11:2014. The UK participation in its pre
2、paration was entrusted to Technical Committee MCE/14, RIC engines. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applica
3、tion. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 80805 0 ICS 01.040.27; 27.020 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Str
4、ategy Committee on 31 December 2014. Amendments issued since publication Date Text affectedBS ISO 7967-11:2014 ISO 2014 Reciprocating internal combustion engines Vocabulary of components and systems Part 11: Fuel systems Moteurs alternatifs combustion interne Vocabulaire des composants et des systme
5、s Partie 11: Systmes de carburant INTERNATIONAL STANDARD ISO 7967-11 First edition 2014-12-15 Reference number ISO 7967-11:2014(E)BS ISO 7967-11:2014ISO 7967-11:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of th
6、is publication may be reproduced or 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 t
7、he country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 7967-11:2014ISO 7967-11:2014(E)Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T er
8、ms and definitions . 1 3.1 Fuel supply system 1 3.2 Carburetor . 2 3.3 Fuel injection system . 9 Bibliography .22 ISO 2014 All rights reserved iiiBS ISO 7967-11:2014ISO 7967-11:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards b
9、odies (ISO member bodies). The work of preparing International 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 organizati
10、ons, governmental and non-governmental, in liaison with 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 furth
11、er maintenance are described in the ISO/IEC Directives, 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/directive
12、s). Attention is drawn to the possibility that some of 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 Int
13、roduction and/or on the ISO list of patent declarations 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 t
14、o conformity assessment, as well as information about ISOs 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
15、the following parts, under the general title Reciprocating 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
16、systems Part 5: Cooling systems Part 6: Lubricating systems 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 7967-11:2014Reciprocati
17、ng internal combustion engines Vocabulary of components and systems Part 11: Fuel systems 1 Scope This 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: fue
18、l supply system (3.1); carburetor (3.2); fuel injection system (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 references The following documents, in whole or in p
19、art, are normatively referenced in this document and are indispensable 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 Vocabu
20、lary Part 1: Fuel injection pumps ISO 7876-3:1993, Fuel injection equipment Vocabulary Part 3: Unit injectors ISO 7876-5, Fuel injection equipment Vocabulary Part 5: Common rail fuel injection system 3 T erms a nd definiti ons 3.1 Fuel supply system 3.1.1 fuel supply system system which consists of
21、low pressure fuel equipment for delivering fuel from the fuel tank to the high pressure unit for fuel injection to the engine 3.1.2 fuel feed pump low pressure pump delivering fuel from the tank through one or several filters, to the high-pressure- generating components SOURCE: ISO 7876-5:2004, 2.2
22、3.1.3 f u el f i lt er filter to eliminate contamination in the fuel INTERNATIONAL ST ANDARD ISO 7967-11:2014(E) ISO 2014 All rights reserved 1BS ISO 7967-11:2014ISO 7967-11:2014(E) 3.1.4 priming pump pump to fill the fuel pipe at starting 3.2 Carburetor 3.2.1 carburetor device which vaporizes fuel
23、into charge air and also controls air-fuel ratio of the mixture 3.2.2 elementary carburetor carburetor (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) 3.2.3 f lo at c a r bu r e t or carburetor (3.2.1) in wh
24、ich the fuel level is maintained at the constant level by the float (3.2.47) and the fuel is absorbed in the air by the vacuum pressure at the venturi (3.2.34) 3.2.4 electronic controlled carburetor carburetor (3.2.1) which controls air-fuel ratio by the electronic circuit 3.2.5 air-fuel ratio feedb
25、ack controlled carburetor carburetor (3.2.1) which is equipped with the device for feedback control of air-fuel ratio 3.2.6 f i xe d- ve nt u r i c a r bu r e t or carburetor (3.2.1) with fixed area venturi 3.2.7 variable venturi carburetor carburetor (3.2.1) with variable area venturi 3.2.8 updraft
26、 carburetor carburetor (3.2.1) with upward exit of air-fuel mixture 3.2.9 downdraft carburetor carburetor (3.2.1) with downward exit of air-fuel mixture 3.2.10 horizontal carburetor sidedraft carburetor carburetor (3.2.1) with horizontal exit of air-fuel mixture 3.2.11 single-barrel carburetor carbu
27、retor (3.2.1) with one set of venturi (3.2.34) 3.2.12 multi-barrel carburetor carburetor (3.2.1) with more than two sets of venturi (3.2.34) 3.2.13 two-barrel carburetor carburetor (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) 3.2.14 co
28、mpound carburetor multiple carburetor multi-carburetor carburetor system with more than two sets of independent carburetors (3.2.1) in which throttle valves (3.2.42) are linked so as to work simultaneously or in sequence Note 1 to entry: The unit with two carburetors is called twin-carburetor. 3.2.1
29、5 two-stage carburetor carburetor system with two carburetors (3.2.1) with different characteristics in which each throttle valve (3.2.42) works in sequence Note 1 to entry: The carburetor which works first is called the primary carburetor and another is called the secondary carburetor. 3.2.16 f l o
30、 a t c i r c u i t float system mechanism which maintains the level of fuel in the carburetor (3.2.1) 3.2.17 main metering system main circuit high-speed system high-speed circuit circuit in the carburetor (3.2.1) where fuel flows continuously during normal engine operation, except idling 3.2.18 slo
31、w speed system idle system idle circuit circuit in the carburetor (3.2.1) where fuel flows at idling 3.2.19 secondary idle system secondary low speed system circuit of the secondary carburetor (3.2.1) where fuel flows from the main fuel circuit when the opening of the throttle valve (3.2.42) is smal
32、l 3.2.20 power system full-power circuit power enrichment system circuit where additional fuel flows for the enrichment of air-fuel mixture at high power operation of the engine 3.2.21 starting system choke system system or a series of parts in the carburetor (3.2.1) which restricts the air flow in
33、the venturi (3.2.34) at the starting of the engine 3.2.22 accelerating system accelerator-pump system circuit of additional fuel for the enrichment of air-fuel mixture at the sudden acceleration of the engine ISO 2014 All rights reserved 3BS ISO 7967-11:2014ISO 7967-11:2014(E) 3.2.23 compensating de
34、vice device which adjusts air-fuel ratio in accordance with the requirement from the engine using a procedure such as air bleed (3.2.53) method 3.2.24 b o r e s i z e o f t h r o t t l e - b o d y f l a n g e throttle-diameter diameter of the exit of the carburetor (3.2.1) which indicates the size o
35、f the carburetor Note 1 to entry: When the carburetor has two or more exits, the size is usually indicated by plural diameters. 3.2.25 carburetor body main body of carburetor body including main parts of the carburetor (3.2.1) such as venturi (3.2.34) and float chamber (3.2.44) 3.2.26 air intake bod
36、y body which forms air intake (3.2.28) passage with the choke valve (3.2.31) 3.2.27 f l a n g e b o d y throttle body body which forms the exit of air passage with throttle valve (3.2.42) 3.2.28 air horn air intake air intake portion of the carburetor (3.2.1) 3.2.30 choke choking means to enrich the
37、 air-fuel mixture by choking the inlet of charge air to the carburetor (3.2.1) 3.2.31 choke valve strangler valve air shutter valve for choking (3.2.30) the air inlet in the carburetor (3.2.1) 3.2.32 choke relief valve valve equipped in the choke valve (3.2.31) which relieves charge air when air-fue
38、l ratio exceeds the limit due to excessive negative pressure at the venturi (3.2.34) 3.2.33 automatic choke device which operates choke valve (3.2.31) automatically depending on the temperature of the engine 3.2.34 venturi venturi tube nozzle (3.2.64) with throat which produces low pressure of charg
39、e air for fuel injection 3.2.35 venturi diameter diameter of throat of venturi (3.2.34)4 ISO 2014 All rights reservedBS ISO 7967-11:2014ISO 7967-11:2014(E) 3.2.36 single venturi venturi (3.2.34) of one part 3.2.37 double venturi unified venturi (3.2.34) from two venturis 3.2.38 triple venturi unifie
40、d venturi (3.2.34) from three venturis 3.2.39 primary venturi smallest venturi (3.2.34) of double venturi (3.2.37) or triple venturi (3.2.38) 3.2.40 secondary venturi venturi (3.2.34) larger than primary venturi (3.2.39) in double venturi (3.2.37) or triple venturi (3.2.38) 3.2.41 third venturi larg
41、est venturi (3.2.34) of triple venturi (3.2.38) 3.2.42 throttle valve throttle butterfly part included in the carburetor (3.2.1) which controls the flow rate of air-fuel mixture into the engine 3.2.43 air valve air damper damper which is equipped in the second stage of two-barrel carburetor (3.2.13)
42、 for the control of air-fuel mixture 3.2.44 f l o a t c h a m b e r float bowl chamber containing fuel with the float (3.2.47) which maintains the fuel level 3.2.45 f l o a t c h a m b e r v e n t pipe or hole (3.2.67) to introduce air pressure into the upper space of the float chamber (3.2.44) 3.2.
43、46 outer vent float chamber vent (3.2.45) connected to the atmosphere 3.2.47 f lo at pontoon part to maintain the level of fuel in the float chamber (3.2.44) 3.2.48 f l o a t v a l v e float needle valve valve which detects the movement of the float (3.2.47) and controls the level of fuel in the flo
44、at chamber (3.2.44) ISO 2014 All rights reserved 5BS ISO 7967-11:2014ISO 7967-11:2014(E) 3.2.49 f lo at -leve l he i g ht distance of upper or lower surface of the float (3.2.47) from a certain reference surface of the float chamber (3.2.44) 3.2.50 fuel-level height level of fuel measured from a cer
45、tain reference surface of the float chamber (3.2.44) 3.2.51 jet metering jet metering orificeorifice used in the carburetor (3.2.1) which controls fuel flow or air flow 3.2.52 fuel jet petrol jet fuel metering jet jet (3.2.51) which controls the fuel flow 3.2.53 air jet air bleed well vent jet jet (
46、3.2.51) which controls bleed air flow 3.2.54 needle jet jet (3.2.51) with jet needle (3.2.55) 3.2.55 jet needle fine bar installed in the hole (3.2.67) of a jet (3.2.51) to control the passage area of the fluid 3.2.56 main jet main-metering jet jet (3.2.51) for the main metering system (3.2.17) 3.2.
47、57 slow running jet slow speed jet idling jet jet (3.2.51) for slow speed system (3.2.18) 3.2.58 secondary slow jet jet (3.2.51) for secondary idle system (3.2.19) 3.2.59 power by-pass jet power jet jet (3.2.51) for power system (3.2.20) 3.2.60 power valve power jet valve valve to control the fuel f
48、low of the power system (3.2.20)6 ISO 2014 All rights reservedBS ISO 7967-11:2014ISO 7967-11:2014(E) 3.2.61 pump jet accelerating pump jet jet (3.2.51) in the accelerating system (3.2.22) 3.2.62 starting petrol jet jet (3.2.51) for starting system (3.2.21) 3.2.63 main air bleed main air jet jet (3.2
49、.51) which bleeds air from the main metering system (3.2.17) 3.2.64 nozzle discharge jet discharge tube nozzle to discharge fuel into charge air flow 3.2.65 main nozzle main discharge nozzle nozzle (3.2.64) in the main metering system 3.2.66 pump discharge nozzle nozzle (3.2.64) in the accelerating system (3.2.22) 3.2.67 port hole hole (3.2.67) for injecting fuel on the air passage of carburetor (3.2.1) 3.2.68 idle port idle discharge hole port (3.2.67) for slow speed system (3.2.18)
