1、AEROSPACESTANDARDCopyright 1972 by Society of Automotive Engineers, Inc.All rights reserved.Printed in U.S.AIssued 11-30-62Revised 4-3-72AS 692 ASociety of Automotive Engineers, Inc.TWO PENNSYLVANIA NEW YORK, N.Y. 10001SAETechnicalBoard providethat: “Alltechnicalreports,including standardsapproved a
2、nd practicesrecommended, are advisoryonly.Theiruse byanyone engaged inindustryortrade isentirelyvoluntary.There isnoagreement to adhereto anySAEstandardorrecommended practice, and no commitment to conform to orbe guided byanytechnicalreport. Informulating and approving technicalreports, the boardand
3、 itsCommitteeswillnot investigate orconsiderpatentswhichmayapplyto the subject matter.Prospectiveusersofthe reportare responsibleforprotecting themselvesagainst liabilityforinfringement of patents.”IGNITER, SPARK, AERONAUTICAL ENGINE (HIGH TENSION)1. SCOPE1.1 Scope: This specification establishes th
4、e performance, qualification, acceptance limits, and identification for aeronautical engine high tension spark igniters.1.2 Classification: Spark igniters of the following gap types and outline configurations are covered by this specification.OUTLINE CONFIGURATIONSClass A - Flange mounted, right ang
5、le terminationClass B - Flange mounted, straight terminationClass C - Thread mountedGAP TYPESType I - High voltage, airType II - High voltage, surfaceType III - High voltage, air surface2. APPLICABLE DOCUMENTSThe following SAE documents of the issue in effect on the date of qualification form a part
6、 of this specification.STANDARDS2.1 Aerospace Standards:AS 422 Spark Igniter Outline, Right Angle Flange MountingAS 423 Spark Igniter Outline, Flange Mounting AS 424 Spark Igniter Outline, Threaded MountingAS 453 Gasket AS 475 Gasket - Spark Igniter2.2 Aerospace Recommended Practices:ARP 484 Spark I
7、gniter Gap TypesARP 670 Terminals, Aircraft Ignition3. REQUIREMENTS3.1 Materials: Materials which are not described herein shall be of the best aeronautical quality and suitable for the purpose intended.3.2 Design: This document specifically covers the performance, qualification and acceptance limit
8、s for aeronautical engine high tension spark igniters. Design details shall conform where practicable to SAE Aerospace Standards (AS) and Aerospace Recommended Practices (ARP).AS 692 A- 2 -3.3 Gasket: When specified by the purchaser, a gasket shall be furnished with each igniter. The purchaser shall
9、 also specify the material and construction. Dimensionally, the gasket will be in accordance with AS 453 or AS 475 as applicable, unless specified otherwise by the purchaser.3.4 Performance: The spark igniter shall perform satisfactorily when subjected to the tests described in this specification.3.
10、5 Identification: Each spark igniter shall be permanently and legibly marked with the following information:(a) The manufacturers name, model number and applicable change letter shall appear around thecircumference of the shielding barrel or shell, or on two faces of the wrenching hex, or on themoun
11、ting flange as designated on the applicable drawing.(b) A manufacturing date code or batch designation shall appear near the above identification. Themanufacturer may establish his own dating code when mutually agreed upon by the purchaser.3.5.1 Special Identification - Similar Appearing, Non-Interc
12、hangeable Spark Igniters: When it is physically possible to install the spark igniter in an engine model other than the engine model in which the spark igniter is or will be qualified for use, the purchaser may require that an apparent physical difference from other similar appearing spark igniter m
13、odels be provided in that area of the spark igniter which is external to the engine and accessible for visual inspection as installed. Such special identification may consist of, for example, color coding, knurling, ribbing, banding, etc. and shall be mutually agreed upon by the vendor and purchaser
14、.4. QUALIFICATION4.1 Classification of Tests: The inspection and testing of spark igniters shall be classified as follows:(a) Qualification Tests: Qualification tests are those tests accomplished on samples submitted forqualification as a satisfactory product.(b) Inspection Tests: Inspection tests a
15、re those tests accomplished on spark Igniters manufacturedand submitted for acceptance under contract.4.2 Qualification Tests: Qualification of a spark igniter shall consist of the following two sections:(a) laboratory (bench) tests(h) Engine tests4.2.1 Laboratory Tests: The laboratory tests may be
16、conducted by the manufacturer under witness by the purchaser at his option. Or, the purchaser may optionally conduct the laboratory tests within his own facilities. Tests may also be conducted by a testing agency mutually agreed upon by the manufacturer and the purchaser. At least 10 spark igniters
17、of the qualifying type shall be subjected to the following tests as described in 4.4:(a) Examination of product (b) Gas leakage(c) Insulation breakdown(d) Gap breakdown (optional)AS 692 A- 3 -4.2.2 Engine Tests:4.2.2.1 Ground Tests: Following the laboratory tests, four or more sample spark igniters
18、shall be used to accumulate a minimum of 1000 hrs of engine operation. No individual spark igniter shall be operated fewer hours than are required in the endurance portion of the engine qualification specification. The accumulated engine time shall include at least one endurance test as specified in
19、 the engine model specification. The 1000 hr requirement shall not be applicable for qualification in engines not subject to at least 150 hr model qualification test requirement. Instead, successful operation for three times specified engine endurance life of two engine sets or six spark igniters, w
20、hichever is greater, shall be required. During all ground tests, the spark igniters shall be connected to the engine ignition system and shall be operated in accordance with the applicable engine model specification.4.2.2.2 Flight Tests: Upon satisfactory completion of the laboratory and engine test
21、s, one engine set of spark igniters shall be tested to determine that altitude starting performance of the qualifying igniter meets the altitude performance requirements of the engine model specification.4.3 Inspection Tests: Acceptance of a spark igniter shall consist of satisfactorily meeting the
22、requirements of the following:4.3.1 Certification: Each shipment shall be accompanied by a notarized statement to the effect that parts conform to applicable specifications and drawings.4.3.2 Tests: The acceptance tests shall consist of the following described in 4.4:(a) Examination of product (b) G
23、as leakage(c) Insulation breakdown(d) Gap breakdown (optional)4.4 Test Methods:4.4.1 Examination of Product: Each spark igniter shall be carefully examined to determine conformance with this specification and applicable drawing.4.4.2 Gas Leakage:4.4.2.1 Qualification Test: Each qualifying spark igni
24、ter shall be soaked at 450 F 30 F for a minimum of 30minutes prior to test. Each qualifying spark igniter shall then complete 10 heating cycles from roomtemperature to 450 F 30 F. During each cycle, the spark igniter shall be tested for leakage bypressurizing the firing end at 400 10 psig gas pressu
25、re or at 1.5 times the design pressure requirement of the spark igniter. Gas leakage through the igniter shall not exceed a total of 30 cc during a 5 minute measurement period at 450 F. After the 10 heating cycles have been completed, the sparkigniter shall then be cooled to room temperature and ret
26、ested at 400 10 psig gas pressure or at 1.5times the design pressure requirement of the spark igniter. Gas leakage through the igniter shall notexceed the rate of 6 cc/minute. Variations of the above test conditions may be negotiated by thepurchaser to meet specific requirements.4.4.2.2 Acceptance T
27、est: Each spark igniter shall be tested at room temperature for leakage by pressurizing the firing end at 400 10 psig gas pressure or at 1.5 times the design pressure requirement. Leakageshall not exceed the rate of 6 cc/minute.4.4.3 Insulation Breakdown: There shall be no indication of insulation b
28、reakdown when the assembled spark igniter is tested with the gap(s) extinguished for at least 3 seconds and a minimum potential equivalent of 13, 000 volts (60 cycles rms) is applied to the center electrode.4.4.4 Gap Breakdown (optional): At the option of the purchaser, the qualification test or the
29、 qualification and acceptance tests, may include specific test procedures to determine the breakdown characteristics of thefiring gap of the igniter. Test conditions, procedures and acceptable limits must be negotiated between the purchaser and vendor.AS 692 A- 4 -5. PREVIOUS QUALIFICATIONIgniters w
30、hich are substantially identical in design, material and function with models previously qualified by the same manufacturer and which differ only in installation dimensions may be considered approved at the option of the purchaser.6. NOTES6.1 Marginal Indicia: The phi () symbol is used to indicate where technical changes have been made in this specification over the previous issue.PREPARED BYAIRCRAFT GAS TURBINE, RAMJET AND ROCKET ENGINE IGNITION SUBCOMMITTEE, OF SAE COMMITTEE E-30, IGNITION RESEARCH
