List and Brief Description of Variables

The data file DATABASE.DBF contains the vehicles used to generate average emission levels used to determine the exhaust running and engine start emission fractions (except for motorcycles) found in Tables 1 and 2 in the report, "Basic Exhaust Emission Rates of Open Loop Vehicles for MOBILE6." (M6.EXH.005). Below is a brief description of the meaning of the fields available in the data file.

Name	Description

SITE_A	Location where the vehicle was tested.

VEH_NO_A	Number assigned to the vehicle during testing.

PROGRAM_A	Label for testing program.

VTYPE	Vehicle class

LDV : Vehicles certified as passenger cars.

LDT1 : Light duty trucks 0 - 6,000 pounds GVWR.

LDT2 : Light duty trucks 6,001 - 8,500 pounds GVWR.

PROC	Recruitment procedure type

ETYPE	Engine type

MFG	Manufacturer

MODEL_YR	Model year (last two digits)

MAKE	Make

ENG_DISP	Engine displacement (cubic inches)

CARB_V	Number of carburetor venturis

TURBO	Turbocharging (Yes/No)

VAR_VENT	Variable venturi carburetor (Yes/No)

CYLNDR	Number of compression cylinders

FUEL_INJ	Fuel delivery type

NO : Carbureted vehicle

PFI : Ported fuel injection system

TBI : Throttle body fuel injection system

CATALYST	Exhaust catalytic convertor type

NONE : Not originally equipped with a catalytic convertor

OXID : Originally equipped with an oxidation catalytic convertor.

3WAY : Originally equipped with a 3-way catalytic convertor.

OX3W: Originally equipped with both an oxidation and 3-way catalytic convertor.

VIN	Vehicle identification number

HCSTD	Applicable EPA emission certification total hydrocarbon standard

COSTD	Applicable EPA emission certification carbon monoxide standard

NOSTD	Applicable EPA emission certification oxides of nitrogen standard

PB_FUEL	Lead content in the fuel as received (parts per million).

PLUMB_TEST	Test for lead deposits in the exhaust tailpipe.

PASS : Lead deposits not detected in the tailpipe.

FAIL : Lead deposits detected in the tailpipe.

NECK_OK	Check for the fuel nozzle restriction in the fuel inlet.

NO : Not originally equipped with restriction or the restriction is present.

YES : The fuel inlet restriction has been removed or disabled.

ENG_FAM	EPA emission certification engine family designation.

TASK	Testing program task designation.

EVAP_FAM	EPA emission certification evaporative family designation.

CAT_CONF	Fuel delivery control system.

OPLP : Open-loop (non-feedback) system.

CLLP : Closed-loop feedback system.

SIZE	Vehicle interior size classification.

ENG_MTG	This field was not used.

SITE_B	Location where the vehicle was tested (repeat for matching).

VEH_NO_B	Number assigned to the vehicle during testing (repeat for matching).

PROGRAM_B	Label for testing program (repeat for matching).

TEST_SEQ	Label used in testing to indicate type of testing done.

HCFTP	Composite weighted Federal Test Procedure results for total hydrocarbons in grams per mile.

COFTP	Composite weighted Federal Test Procedure results for carbon monoxide in grams per mile.

CO2FTP	Composite weighted Federal Test Procedure results for carbon dioxide in grams per mile.

NOFTP	Composite weighted Federal Test Procedure results for oxides of nitrogen in grams per mile.

MPGFTP	Composite weighted Federal Test Procedure results for fuel economy in miles per gallon.

FE1	Federal Test Procedure results for bag 1 for fuel economy in miles per gallon.

HC1	Federal Test Procedure results for bag 1 for total hydrocarbons in grams per mile.

CO1	Federal Test Procedure results for bag 1 for carbon monoxide in grams per mile.

CO21	Federal Test Procedure results for bag 1 for carbon dioxide in grams per mile.

NO1	Federal Test Procedure results for bag 1 for oxides of nitrogen in grams per mile.

MTH1	Federal Test Procedure results for bag 1 for methane hydrocarbons in grams per mile.

FE2	Federal Test Procedure results for bag 2 for fuel economy in miles per gallon.

HC2	Federal Test Procedure results for bag 2 for total hydrocarbons in grams per mile.

CO2	Federal Test Procedure results for bag 2 for carbon monoxide in grams per mile.

CO22	Federal Test Procedure results for bag 2 for carbon dioxide in grams per mile.

NO2	Federal Test Procedure results for bag 2 for oxides of nitrogen in grams per mile.

MTH2	Federal Test Procedure results for bag 2 for methane hydrocarbons in grams per mile.

FE3	Federal Test Procedure results for bag 2 for fuel economy in miles per gallon.

HC3	Federal Test Procedure results for bag 2 for total hydrocarbons in grams per mile.

CO3	Federal Test Procedure results for bag 2 for carbon monoxide in grams per mile.

CO23	Federal Test Procedure results for bag 2 for carbon dioxide in grams per mile.

NO3	Federal Test Procedure results for bag 2 for oxides of nitrogen in grams per mile.

MTH3	Federal Test Procedure results for bag 2 for methane hydrocarbons in grams per mile.

AC_SIM	Indicates whether air conditioning load was simulated during testing.

YES : Extra load added to simulate air conditioning was used.

NO : No extra load was used.

MFG : Extra load added to simulate air conditioning was used.

MTHFTP	Composite weighted Federal Test Procedure results for methane hydrocarbons in grams per mile.

MILEAGE	Odometer mileage recorded at the time of vehicle testing. (miles)