1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 11 18 N-STATUS No known use. No replacement named D. DiGregorio, NA 2003 08 07 Activated M. Bumbaroska Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, Inc. Page 1 of 2 COMPRESSED NATURAL GAS (CNG), U.S. DEVELOPME
2、NT WSS-M99C129-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a compressed natural gas representing United States market quality. 2. APPLICATION This specification was released originally as a recommendation for minimum fuel requirements for CNG vehicles. Sect
3、ions titled QUALITY SYSTEM REQUIREMENTS, SUPPLIERS RESPONSIBILITY, and APPROVAL OF MATERIALS in specification WSS-M99P1111-A (see para 3.1) apply only to engine oils supplied directly to Ford Motor Company and its affiliates. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Materia
4、l suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 PERFORMANCE Shall meet all the requirements of SAE J1616, plus the following: 3.3 PHYSICAL/CHEMICAL PROPERTIES 3.3.1 Sulfur, ppm max 16 (ASTM D 6228 or any agreed method)
5、3.3.2 Composition 3.3.2.1 Hydrocarbons, vol.% (ASTM D 1945) Methane, min 88.0 Ethane, max 6.0 C3 and higher, max. 3.0 C6 and higher 0.2 3.3.2.2 Hydrogen, % max 0.1 3.3.2.3 Oxygen, % max 1.0 3.3.2.4 Carbon Monoxide, % max 0.1 ENGINEERING MATERIAL SPECIFICATIONWSS-M99C129-A Printed copies are uncontro
6、lled Copyright 2009, Ford Global Technologies, Inc. Page 2 of 2 3.3.3 Contaminants Oil Carryover, ppm 10 - 80 (GTI Method) 3.4 QUALIFICATION It is the suppliers responsibility to have the technical evidence and documentation certifying that a given formulation (base oil/additive combination) meets all requirements described in this specification. The affected Ford Fuels and Lubricants Engineering activity reserves the right to request certification documentation from any company claiming to meet this specification.
