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ALL PASSENGER CAR MANUFACTURERS ALL LIGHT-DUTY TRUCK MANUFACTURERS ALL MEDIUM-DUTY VEHICLE MANUFACTURERS ALL INTERESTED PARTIES Optional Test Procedure For Certifying Pre-2005 Model-Year Gasoline- Fueled Zero-Evaporative Vehicles And For Offsetting Evapor

By Alan C. Lloyd, Ph. D, Gray Davis, Nmog Emissions, For Such Vehicles and R. B. Summerfield

Abstract

This letter notifies all interested parties that the Alliance of Automobile Manufacturers proposed test procedure for certifying gasoline-fueled zero evaporative vehicles has been approved, with modifications (see Attachment). Beginning with the 2005 modelyear vehicles, however, manufacturers must provide additional supporting data, such as aging all fuel system components to full useful life, to continue using this procedure. Also, included is the recommended exhaust NMOG/evaporative trading factors. The first factor, 0.1 g/test per 0.002 g/mi NMOG, is derived from the allowance in Section 1976(b)(1)(E) of Title 13, California Code of Regulations (13 CCR) for vehicles seeking a partial zero-emission vehicle (PZEV) credit and may be applied to reduce measured fuel evaporative emissions for certification and in-use testing provided that the vehicle’s measured exhaust NMOG certification and in-use emissions are proportionately increased. The second factor, a 0.002 g/mi NMOG credit, is derived from the allowance in 13 CCR Section 1961(a)(11) and may be applied to reduce measured exhaust NMOG certification and in-use emissions for vehicles that are certified to the optional zero-fuel evaporative emission standard but do not seek PZEV credit. If you have any additional questions, please contact Ms. Rhonda Runyon, Staff

Year: 2001
OAI identifier: oai:CiteSeerX.psu:10.1.1.352.9911
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