1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 11 11 Activated L. Benvenutti Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, Inc. Page 1 of 2 COMPRESSED NATURAL GAS (CNG), VENEZUELA FIRST FILL WSS-M17B20-A 1. SCOPE The material defined by this specification i
2、s a compressed natural gas representing Venezuela market quality. 2. APPLICATION This specification was released originally as a recommendation for minimum fuel requirements for CNG vehicles. Sections titled QUALITY SYSTEM REQUIREMENTS, SUPPLIERS RESPONSIBILITY, and APPROVAL OF MATERIALS in specific
3、ation 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 Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materia
4、ls (WSS-M99P1111-A). 3.2 PERFORMANCE 3.2.1 Wobbe Index, MJ/m344.0 55.0 (ISO 6976) 3.3 PHYSICAL/CHEMICAL PROPERTIES 3.3.1 Sulfur (including odorant), ppm max 70 (ASTM D 6326-3) 3.3.2 Composition 3.3.2.1 Hydrocarbons, vol.% (ASTM D 1945) Methane, min 80.0 Ethane, max 12.0 Propane, max. 3.0 C4 and high
5、er, max. 1.5 C6 and higher 0.2 3.3.2.2 Carbon Dioxide, % max 8.5 3.3.2.3 Nitrogen, % max 1.0 3.3.2.4 Hydrogen, % max 0.1 ENGINEERING MATERIAL SPECIFICATIONWSS-M17B20-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, Inc. Page 2 of 2 3.3.2.5 Oxygen, % max 0.1 3.3.2.6 Carbon
6、Monoxide, % max 0.1 3.3.2.7 Water, mg/m3max 112 3.3.3 Contaminants 3.3.3.1 CNG fuel delivered to the vehicle can not have visible solid or liquid particulate matter. 3.3.4 Natural Gas Odorant Natural gas introduced into any CNG fueling station or vehicle shall have a distinctive odor potent enough f
7、or its presence to be detected down to a concentration in air of not over 1/5 of the lower limit of flammability. This is approximately 1.0% gas in air by volume. 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.
