1、MIL-DTL-52649C INCH-POUND11 May 2009 SUPERSEDING MIL-E-52649B 18 November 1992 DETAIL SPECIFICATION ENGINE COLD STARTING AIDS, ETHER FUEL PRIMERS MIL-E-52649B, dated 18 November 1992, is hereby reactivated and may be used for either new or existing design acquisition.This specification is approved f
2、or use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers primer equipment for adding controlled quantities of engine priming fuel to internal combustion engines of commercial equipment as an aid in starting at low temperatures. 1.2 Part or Id
3、entifying Number (PIN). The PIN to be used for engine cold starting aids acquired to this specification are created as follows: Specification numberCylinder capacity designator (see 1.2.2) Primer equipment type (see 1.2.1) Size/type designator (see 1.2.1) M 52649 - A - III - 2 M prefixComments, sugg
4、estions, or questions on this document should be addressed to: Defense Supply Center, Columbus, Attn: DSCC-VAI, P.O. Box 3990, Columbus OH 43218-3990, or emailed to FluidFlowdla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIS
5、T Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 2910Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-52649C 2 1.2.1 Classification. The primer equipment will be classified as one of the following types and sizes: Size designator D
6、escription 2 2.5 cubic centimeters (cc) discharge, see 3.5.1. 4 4 cc discharge, see 3.5.2. 5 5 cc discharge, see 3.5.3. 6 6 cc discharge, see 3.5.4. 12 12 cc discharge, see 3.5.5. Type designator Description III Gas propellant primer equipment system, 18 ounce (oz) cylinder. Use with capacity design
7、ator A only, see 1.2.2 and 3.5.6. V Gas propellant fully automatic primer equipment system, 18 oz or 21 oz cylinder. Use with capacity designator A or B, see 1.2.2 and 3.5.7. 1.2.2 Capacity designator. The capacity designator is a letter code used to designate the required cylinder capacity as follo
8、ws: Capacity designator Cylinder capacity A 18 oz B 21 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additi
9、onal information or as examples. While every effort had been made to ensure the completeness of the list, document users are cautioned that they must meet all specified requirements documents cited in sections 3, 4, or 5 of this specification, whether or not the are listed. 2.2 Government documents.
10、 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATION O-F-10
11、44 - Fuel, Engine Primer: Cold Starting, in Pressurized and Non-pressurized Containers. FEDERAL STANDARD FED-STD-H28 - Screw-Thread Standards for Federal Services Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-52649C 3 DEPARTMENT OF DEFENSE
12、SPECIFICATIONS MIL-E-199 - Ether, Diethyl, Technical MS39254 - Cylinder, Engine Starting (Engine Cold-Starting Aid) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Markings of U.S. Military Property MIL-STD-889 - Dissimilar Metals (Copies of these documents are available online at http:
13、/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of
14、 these documents are those cited in the solicitation or contract (see 6.2). ASTM INTERNATIONAL ASTM B633 - Electrodeposited Coatings of Zinc on Iron and Steel ASTM D2000 - Standard Classification System for Runner Products in Automotive Application (Copies of these documents are available online at
15、http:/www.astm.org or from the ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted here in or in the contract, in the event of a conflict between the text of this document and the references cited herein, the te
16、xt of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4
17、.5 3.2 Description. The primer equipment shall consist of a permanently mounted frame accepting one of the engine primer fuel containers utilizing bulk primer fuel as specified in O-F-1044, a control device for metering the discharge through safety accessories, a discharge tube, and intake manifold
18、dispensing nozzles. 3.3 Dissimilar metals. Dissimilar metal shall not be used in intimate contact with each other unless protected against galvanic corrosion. Dissimilar metals and methods of protection as specified in MIL-STD-889. Provided by IHSNot for ResaleNo reproduction or networking permitted
19、 without license from IHS-,-,-MIL-DTL-52649C 4 3.4 Materials. Materials shall be as specified herein. Materials not specified shall be selected by the contractor, and shall be subject to all provisions of this specification. Mounting frames and metering devices shall be made from corrosion-resistant
20、 metals, nylon, or steel, zinc-coated in accordance with ASTM B633, Fe/Zn 25 SC 4, type VI. The remote control cables, when applicable, shall be of austenitic stainless steel or lubricated and encased in plastic sleeves. 3.4.1 Material deterioration prevention and control. The primer equipment shall
21、 be fabricated from compatible materials, inherently corrosion resistant or treated to provide protection against the various forms of corrosion and deterioration that may be encountered in any of the applicable operating and storage environments to which the primer equipment may be exposed. 3.4.2 I
22、dentification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use with component and subcomponent, and shall make information available upon request to the contracting officer or designated representative. 3.4.3 Recycled, recovered, or
23、 environmentally preferable materials. Recycled, recovered, or environmentally preferable materials shall be used to the maximum extent possible provided that the material meets operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.5 Design and construc
24、tion. 3.5.1 Size 2. Size 2 primer shall deliver 2.5 0.5 cc of primer fuel at the atomizer during on operation cycle. 3.5.2 Size 4. Size 4 primer shall deliver 4 0.5 cc of primer fuel at the atomizer during one operation cycle. 3.5.3 Size 5. Size 5 primer shall deliver 5 0.5 cc of primer fuel at the
25、atomizer during one operation cycle. 3.5.4 Size 6. Size 6 primer shall deliver 6 0.5 cc of primer fuel at the atomizer during one operation cycle. 3.5.5 Size 12 . Size 12 primer shall deliver 12 1.0 cc of primer fuel at the atomizer during one operation cycle. 3.5.6 Type III gas propellant priming e
26、quipment. Type III primer equipment shall be as follows: a. Utilize an 18 ounce cylinder in accordance with MS39254 charged with engine primer fuel with propellant as specified in O-F-1044, type III. b. The primer equipment shall be attached to the primer container by screw threads in accordance wit
27、h FED-STD-H28 and a rubber gasket in accordance with ASTM D2000 class M3BG614C12EO34F19, shall be provided for a leak-free connection. c. The primer equipment mounting shall fix and support the fuel container vertically and shall prohibit movement horizontally. The mount shall hold the container by
28、friction, over-center type, or screw-type clamping device. d. The clamping device shall permit changing of the fuel container by an operator wearing arctic-mittens. e. Control shall be by mechanical or electro-mechanical linkage. The metering device shall be double acting. Provided by IHSNot for Res
29、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-52649C 5 f. The primary action shall open the chamber in the volume specified by the applicable size. g. The secondary action of the metering valve shall allow the container valve to close to prevent continued flow, and
30、at the same time, the chamber outlet valve open, allowing the accumulated gas to propel the charge of primer fuel through flexible copper or nylon tubing to the atomizer. 3.5.6.1 Type III safety accessories. When specified (see 6.2), thermal controls to protect an engine against ether injection afte
31、r warm-up, and cranking controls to protect against hydraulic block by excessive ether injection prior to cranking shall be furnished. 3.5.6.1.1 Temperature and pressure control combination. When applicable, safety controls shall be furnished separately or in combination. For combination use, utiliz
32、ing the pressure-sensitive valve (see 3.5.3.2), the thermal valve (see 3.5.3.3) shall be placed in the primer line between the metering device and the oil-pressure sensor plug. This combination will inhibit injection of primer fuel when the oil pressure of the engine is below 3 psi and when the bloc
33、k temperature of the engine rises above 50 F (10 C). 3.5.6.1.2 Cranking control. The cranking control shall be a pressure-sensitive valve. The valve shall be normally closed, inhibiting the flow of primer fuel between the metering equipment and the air induction system. The valve shall open at an oi
34、l pressure of 5 psi (34.5 kPa) and above, and will close when oil pressure falls below 3 psi (20.7 kPa). The control design shall be such that primer fuel can only be injected into the manifold when oil pressure due to cranking reaches 5 psi and above. The pressure sensor shall have 1/8-inch pipe th
35、reads in accordance with FED-STD-H28. 3.5.6.1.3 Temperature control. When a thermal control is specified, either of the following types may be furnished. 3.5.6.1.4 Engine coolant temperature control. The temperature control device shall receive thermal energy from the cooling system. The device shal
36、l prevent the flow of ether when the coolant temperature rises above the 100 F (37.7 C). Upon cooling, the device shall open to allow ether flow at 50 F (10 C) or below engine coolant temperature. 3.5.6.1.5 Engine manifold temperature control. The temperature control device shall receive thermal ene
37、rgy from the exhaust manifold. The device shall prevent the flow of ether when the exhaust manifold temperature rises above the 140 F (60 C). Upon cooling, the device shall open to allow ether flow at 50 F (10 C) or below exhaust manifold temperature. Provided by IHSNot for ResaleNo reproduction or
38、networking permitted without license from IHS-,-,-MIL-DTL-52649C 6 3.5.7 Type V gas propellant fully automatic priming equipment. Type V primer equipment shall be as follows: a. Utilize an 18-ounce (.51 kg) or 21-ounce (.60 kg) cylinder, in accordance with MS39254, charged with engine primer fuel wi
39、th propellant as specified in O-F-1044, type III. b. The primer equipment shall be attached to the primer container by screw threads in accordance with FED-STD-H28 and a rubber gasket conforming to ASTM D2000 class M3BG614C12EO34F19, shall be provided for a leak-free connection. c. The primer equipm
40、ent mounting shall fix and support the fuel container vertically and shall prohibit movement horizontally. The mount shall hold the container by friction, over-center type, or screw- type clamping device. d. The clamping device shall permit changing of the fuel container by an operator wearing arcti
41、c-mittens. e. The primer equipment engine temperature sensor switch shall determine when the system shall function. f. When needed, the solenoid valve shall be activated automatically during engine cranking, then the primer fuel shall be released from the pressurized cylinder, flows through the valv
42、e, through the metering orifice at full cylinder pressure, through flexible copper or nylon tubing and, out of an injector nozzle located in the engines air intake system. g. The valve shall have a reservoir that maintains flow of primer fuel after cranking to prevent the just-started engine from fa
43、ltering or dying. h. The primer equipment shall deliver not more than 0.25-cc of primer fuel per 100 cubic inches of engine displacement per second. i. The primer fuel flow shall be continuous throughout the cranking operation. 3.5.7.1 Type V safety accessory. The type V primer equipment shall be wi
44、th a factory-preset interlock engine temperature sensor which shall prevent the primer equipment from supplying primer fuel to a warm engine. 3.6 Performance. 3.6.1 Diethyl ether stability. When tested in accordance with 4.7.2, non-metallic material shall not swell, harden or soften rendering the no
45、n-metallic parts unfit for the endurance test (see 4.7.3). 3.6.2 Endurance. When tested in accordance with 4.7.3, the plastics, rubbers, and fibers utilized in the fabrication of primer equipment shall remain functional. 3.6.3 Thermal stability and discharge volume. When tested in accordance with 4.
46、7.4 the primer equipment shall operate to discharge a repeatable volume of fuel within 0.5 cc of the specified volume, without leakage, in temperatures ranging from -65 to +100 F for 1,000 cycles. 3.6.4 Valve actuation. The solenoid-actuated valve shall activate when voltage is applied to it. 3.6.5
47、Leakage. No leakage shall be observed coming from the primer after the activation of the valve. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-52649C 7 3.7 Treatment and painting. Unless otherwise specified (see 6.2), the painting of the pri
48、mer equipment shall be the suppliers standard. When specified (see 6.2), painting shall be in accordance with the acquisition requirements. 3.8 Identification markings. Identification markings shall be in accordance with MIL-STD-130, method optional, and shall include as a minimum the following: a.
49、The capacity of the metered primer fuel output as specified by the given size. b. Contractors name and model as applicable. 3.9 Workmanship. Components and assemblies of the primer equipment including seals, stampings, and moldings shall be clean and free from fins, sharp edges, pits, or scratches. Each primer assembly shall be complete and function smoothly and to its specified
