1、 flIL-PRF-6259LA 9 0b 20333b 083 9 IINc“DI MIL-PRF-6254 1 A 28 Arill997 SUPERSEDING 24 February 1988 MIL-E-6254 1 (AT) PERFORMANCE SPECIFICATION ENGINE, DIESEL, 6-CYLINDER, V-TYPE, 275 H.P., TURBOCHARGED This specification is approved for use by all Departments and Agencies of the Department of Defe
2、nse. 1. SCOPE 1.1 ScoPe. This specification covers a commercial, 6-cylinder, V-type, liquid-cooled, 2-stroke-cycle, crosshead-piston, turbocharged, by-pass blower, internal-combustion, compression-ignition (diesel) engine for use in military vehicles M730A2 and M113A3. 2. APPLICABLE DOCUMENTS 2.1 Ge
3、neral. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the complete
4、ness of this list, document users are cautioned that they must meet ali specified requirement documents cited in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving
5、 this document should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-EBLUE, Warren, MI 48397-5000, by using the Standardization Document Improvement Proposal D Form 1426) appearing at the end of this document. or bv letter. AMSC NfA FSC 28 15 DISTRIBUTION STATEMENT
6、A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesMIL-PRF-625YLA W 9999906 2033397 TIT W MIL-PRF-6254 1A 2.2 Government documents. 2.2.1 SDecifications. standards. and handbooks. The following specifications, standards, and handbooks form a part of t
7、his document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL A-A-525
8、5 7 - Fuel Oil, Diesel: For Posts, Camps and Stations. DEPARTMENT OF DEFENSE MIL-PRF-2 1 O4 MLF-46162 MLT-83 133 - Lubricating Oil, Internal Combustion Engine, Combat/Tactical Service. - Fuel, Diesel, Referee Grade. - Turbine Fuel, Aviation, Kerosene Types, NATO F-34 (JP-8) and NATO F-35 (Unless oth
9、erwise indicated, copies of above specifications, standards, handbooks are . available fiorn Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 11-5094.) 2.2.2 other Government documents. drawings. and publications. The following other Government documents, dr
10、awings, and publications form a part of this document to the extent specifled herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS ARMY 11650200 11650249 - Engine, Diesel, for the M730A2 Carrier (Interface). - Engine, Diesel, for the M113A3 Carrier (Inteditce)
11、. (Copies of these drawings are available fiorn the U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-EBLUE, Warren, MI 48397-5000.) 2 Licensed by Information Handling ServicesMIL-PRF-62541A = 999990b 2033398 95b m MIL-PRF-6254 1 A 2.3 Non-Government publications. The following documen
12、ts form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the is
13、sues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARD INSTITUTE (ANSI) ANSUASQC 21.4 - Sampling Procedures and Tables for Inspection by Attributes OD Adopted). (Application for the copies should be addressed to the American National Standards Institute, 11 West 42nd S
14、treet, New York, NY 10036.) 2.4 Order of urecedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption. ha
15、s been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a first article sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Materials shall be in accordance with the manufacturers materiais specifications for diesel engines. The material
16、s shall be capable of meeting all the operational and environmental requirements specified herein (see 4.5.1). 3.3 Design and construction. 3.3.1 Construction. All interface and envelope dimensions shall conform to drawings 11650200 and 11650249 (see 4.5.2). 3.3.2 Interchangeability. Component assem
17、blies and parts shall be so constructed that any part, except those frnished in matched sets or for which a selective fit is specified, may be installed, replaced, and adjusted with no modification required (see 4.5.2). 3.3.3 Accessories and equipment. Unless otherwise specified herein, all accessor
18、ies and equipment shall be installed on the engine and properly adjusted (see 4.5.2). 3.3.4 Speed range. The engine shall be designed to operate satisfactorily under all loads and conditions as specified herein throughout the specified speeds (see 4.5.2). 3 Licensed by Information Handling ServicesM
19、IL-PRF-62541A 3.3.5 M. Fuel shall be No. 2D of A-A-52557 or JI?-8 of MIL-T-83 133. 3.3.6 Coolant. Engine coolant shall be protected against freezing down to -25 degrees Fahrenheit (OF). Operation at full load throughout the speed range in ambient temperatures of +125“F shall not cause overheating or
20、 boiling ofthe coolant (see 3.4.10 and 4.5.3.8). 3.3.7 m. Lubricating oil shall conform to MIL-PRF-2104. 3.4 Performance. Except as otherwise specified herein, the engine shall meet all performance requirements as specified in 3.4.1 through 3.4.14. 3.4.1 Limiting operating temDeratures. Oil sump and
21、 engine coolant temperatures when operating at full load throughout the speed range under any of the conditions specified herein shall not exceed 235F and 190F respectively (see 4.5.3). 3.4.2 Exhaust. The engine shall operate at all conditions with an exhaust back pressure less than 3.0 inches of me
22、rcury (in. Hg) (see 4.5.3). 3.4.3 Idle speed. The engine shall maintain an idle speed of 650 to 700 revolutions per minute (rpm) (see 4.5.3.1). 3.4.4 Governor. The governor shall limit maximum engine speed at full load and no load operation to 2775 to 2825 rpm, and 2940 to 2990 rpm respectively (see
23、 4.5.3.2). 3.4.5 Dynamometer performance. The engine at the full rack setting shall meet the performance specified in 3.4.5.1 through 3.4.5.3 when corrected to standard conditions (see 4.5.3.3 and 6.3). 3.4.5.1 Torque. Torque at the flywheel shall be not less than 595 pound-feet (lb-ft) at an engine
24、 speed of 1600 rpm (see 4.5.3.3). 3.4.5.2 Brake horsepower. The engine shall develop at least 264 gross brake horsepower (hp) at a speed of 2800 rpm (see 4.5.3.3). 3.4.5.3 Fuel consumption. Fuel consumption shall not exceed 0.365 and 0.381 pounds per brake horsepower-hour at 2200 and 2800 rpm respec
25、tively (see 4.5.3.3). 3.4.6 Exhaust smoke density. Exhaust smoke density at fill rack position, through the speed range of 2000 to 2800 rpm when measured within 3 feet (fi) ofthe turbocharger outlet, shall not exceed a number 3 (light gray) smoke condition as defined in 4.5.3.4. 4 Licensed by Inform
26、ation Handling ServicesMIL-PRF-62541A 9999906 2033400 334 MIL-PRF-6254 1 A 3.4.7 Oil consumption. After 25 hours (hr) of operation, the engine shaii have consumed not more than 0.0035 lb of lubricating oil per brake horsepower-hour, when operating at fidi rack throughout the power check phase with a
27、n oil sump temperature of 200 to 230F measured at the oil cooler outlet of the main gallery (see 4.5.3.5). 3.4.8 Oil pressure. Under all performance conditions specified herein (icluding a 1 quart low sump condition), with an oil sump temperature range f-om 200 to 230F, gaiiery oil pressure shall no
28、t be more than 80 pounds per square inch (psi) and not less than 40 psi, when the engine is operating at 2800 rpm. Gallery oil pressure shali not be less than 5 psi when the engine is idling as specified in 3.4.3, with the oil sump temperature range from 180 to 230F (see 4.5.3.6). 3.4.9 Endurance (4
29、00 hr test). The engine shall operate as specified in 4.5.3.7 for a period of 400 hr. During the test, the engine shall require only minor repairs, such as replacement of belts and filters. At the conclusion of this test, the engine shall conform to the performance requirements specified in 3.4.3 to
30、 3.4.7, with the exception that the engine shall not develop less than 90% of its initial power output with a maximum exhaust smoke density as specified in 3.4.6 without adjustments to the engine and shall develop 95% of full rated power burning of valves or pistons; sticking of valves or piston rin
31、gs; leakage of gaskets or seals; imminent failure of components; or other malfunction. 3.4.10 Extreme temperature starting conditions. The engine shall start within 2 minutes under any of the following conditions or possible combination of conditions: a. b. With integral cold starting aid, without e
32、xternal aids after being cold-soaked for a 24 hr period, without benefit of solar radiation, in an ambient temperature of -25“F, and with the engine cranking speed not less than 120 rpm and the voltage to the air pump at 16 volts (V) (see 4.5.3.8). Without external aids, and when operated at the fol
33、lowiiig temperature with exposure to maximum solar radiation (see 4.5.3.8): Ambient air temperature 125F Intake air temperature (at air cleaner inlet) 125F Coolant outlet temperature 230F Outlet sump temperature attainable Maximum temperature up to 275F 3.4.1 1 Low-pressure conditions. At an atmosph
34、ere pressure equivalent to 8000 fi, the observed power output of the engine shall be not less than 90% of rated power (see 4.5.3.9). 5 Licensed by Information Handling Services. MIL-PRF-6254LA = 9999906 2033401 270 t I c MILPRF-6254 1 A 3.4.12 Humidity conditions. The engine shall perform as specifi
35、ed herein under relative humidity conditions as low as 5% at a temperature of 125F and as hidi as 100% at all temperatures fiom -25 to +85F (see 4.5.3.10). 3.4.13 Steam and water iet cleaning. Engine and components shall withstand cleaning specified in 4.5.3.1 1 without deterioration of seals or hos
36、e, leakage past seals or gaskets, or other defects. Paint removal shall not be considered a deficiency (see 4.5.3.1 i). 3.4.14 Enaine interchangeability. Engine shail install with no modifications to the engine vehicle or vehicle components (see 4.5.3.12). 3.5 Exterior surface treatment. All exposed
37、 exterior surfaces of the engine and its components shall be cleaned, and painted or treated for corrosion resistance as specified on the applicable drawings or equivalent, or if not so specified, in accordance with the manufacturers standard practice (see 4.5.2). 3.6 Identification marking. Engine
38、shall be marked with permanent, legible characters and shall be suitable to withstand the environmental requirements specified herein. The engine shall be marked with the National Stock Number (NSN), the manufacturers name and part number (see 4.5.2). 3.7 Workmanship. The workmanship shall be such q
39、uality as to assure that engines procured under contract meet all requirements specified herein. The engines produced shall be fiee of any defects or safkty hazards which affect its perormance or serviceability (see 4.5.2). 4. VEFUFICATION 4.1 Classification of inspections. The inspection requiremen
40、ts specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspections (see 4.3). 4.2 First article inspection. When specified (see 6.2) first article inspections shall be performed on preproduction or initial production samples as specified when a rst artic
41、le sample is required (see 3.1). This inspection shall include the examinations of 4.4 (see table I) and the applicable tests of 4.5.3.1 through 4.5.3.12 (see table II). 4.2.1 Preproduction inspection. When specified (see 6.2), first article preproduction inspection shaii be performed on 2 engines.
42、This inspection shall include the examinations of 4.4 (see table I) and the applicable tests of 4.5.3.1 through 4.5.3.12 (see table II). 6 Licensed by Information Handling Servicescategosr MIL-PRF-bZ54LA m 9999906 2033402 LO7 m Defect Maior: 101 102 103 104 Minor: 20 1 202 203 SIE Il = Construction
43、- Not in accordance with drawings (see 3.3.1). Interchangeability - Adjustment or modification required (see 3.3.2). Accessories and equipment - Not as specified (see 3.3.3). Speed range - Operation not satisfactory (see 3.3.4). Painting improper (see 3.5). Identification - Not in accordance with dr
44、awing (see 3.6). Workmanship - Defects, safety hazards or insucient quality (see 3.7). Standard Inspection Equipment. Methoof examination Visual & SIE A/ Visual Visual SIE Visual Visual Visual & SIE 4.2.2 Initial production insuection. Unless otherwise specified (see 6.2), the Government shall selec
45、t 2 fiom the fist 10 engines produced under the production contract for initiai production inspection. Initial production units shall be inspected as specified in table II. TABLE IT Classification of i Title Materials Defects (see table I) Limiting operating Exhaust Idle speed Governor Dynamometer p
46、erformance Torque Brake horsepower Fuel consumption Exhaust smoke density Oil consumption Oil pressure Endurance test Extreme temperature starting conditions Low pressure conditions Humidity conditions Steam and water jet cleaning Engme interchangeability temperatures Reauiremmt 3.2 3.3.1 thru 3.3.4
47、 & 3.5 thni 3.7 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.5.1 3.4.5.2 3.4.5.3 3.4.6 3.4.7 3.4.8 3.4.9 3.4.10 3.4.11 3.4.12 3.4.13 3.4.14 pections. Inspection 4.5.1 1.5.2 4.5.3 4.5.3 4.5.3.1 4.5.3.2 4.5.3.3 4.5.3.3 4.5.3.3 4.5.3.3 4.5.3.4 4.5.3.5 4.5.3.6 4.5.3.7 4.5.3.8 4.5.3.9 4.5.3.10 4.5.3.11 4.5.3.12 art
48、icle x X X X X X X X X X X X X X X X X X X conform- a.nce X X X X X X X 7 Licensed by Information Handling Services MIL-PRF-62541A 999990b 2033403 043 . MIL-PRF-62541A 4.3 Conformance inmection. Conformance inspection shall include the examinations of 4.4 (see table I) and the tests of 4.5.3.1 throu
49、gh 4.5.3.12 (see table II). 4.4 Examination. 4.4.1 Sampling. Samples from an inspection lot for examination shall be selected in accordance with ANSUASQC 21.4. Any redesign or modification of tlie contractors standard to comply with specified requirements shail receive particular attention for adequacy and suitability. This element of inspection shall encompass all Msual examinations and dimensional measurements of requirements as listed in table I. Noncompliance with any specified requirement or presence of one or more defects preventing or lesseni
