§ 86.1803-01 Definitions.

f design which senses temperature, vehicle speed, engine RPM, transmission gear, manifold vacuum, or any other parameter for the purpose of activating, modulating, delaying, or deactivating the operation of any part of the emission control system. Averaging for chassis-bases heavy-duty vehicles means the exchange of NO X emission credits among test groups within a given manufacturer's product line. Averaging set means a category or subcategory of vehicles within which test groups can average and trade emission credits with one another. Axle clearance means the vertical distance from the level surface on which an automobile is standing to the lowest point on the axle differential of the automobile. Banking means the retention of emission credits by the manufacturer generating the emission credits, for use in future model year certification programs as permitted by regulation. Basic engine has the meaning given in 40 CFR 600.002. Basic vehicle frontal area means the area enclosed by the geometric projection of the basic vehicle along the longitudinal axis, which includes tires but excludes mirrors and air deflectors, onto a plane perpendicular to the longitudinal axis of the vehicle. Bi-directional control means the capability of a diagnostic tool to send messages on the data bus that temporarily overrides the module's control over a sensor or actuator and gives control to the diagnostic tool operator. Bi-directional controls do not create permanent changes to engine or component calibrations. Bin or emission bin means a set of emission standards applicable to exhaust pollutants measured on the Federal Test Procedure (FTP). A bin is equivalent to a horizontal row of FTP standards in Tables S04-1 and S04-2 shown in this subpart. Manufacturers are generally free to choose the bin of standards that will apply to a certain test group of vehicles, provided that on a sales weighted average of those bins, all of their vehicles meet a specified fleet average standard for a particular pollutant

able emission standard for the vehicles in the family or test group in the context of fleet-average standards or emission credits. Federal Test Procedure has the meaning given in 40 CFR 1066.801(c)(1)(i). Fire truck means a vehicle designed to be used under emergency conditions to transport personnel and equipment and to support the suppression of fires and mitigation of other hazardous situations. Fixed liquid level gauge means a type of liquid level gauge used on liquefied petroleum gas-fueled vehicles which uses a relatively small positive shutoff valve and is designed to indicate when the liquid level in the fuel tank being filled reaches the proper fill level. The venting of fuel vapor and/or liquid fuel to the atmosphere during the refueling event is generally associated with the use of the fixed liquid level gauge. Flexible fuel vehicle means any motor vehicle engineered and designed to be operated on a petroleum fuel and on a methanol or ethanol fuel, or any mixture of the petroleum fuel and methanol or ethanol. Methanol-fueled and ethanol-fueled vehicles that are only marginally functional when using gasoline ( e.g., the engine has a drop in rated horsepower of more than 80 percent) are not flexible fuel vehicles. Fuel cell vehicle means an electric vehicle propelled solely by an electric motor where energy for the motor is supplied by an electrochemical cell that produces electricity via the non-combustion reaction of a consumable fuel, typically hydrogen. Fuel system means the combination of fuel tank(s), fuel pump, fuel lines, and carburetor or fuel injection components, and includes all fuel system vents and fuel evaporative emission control system components. Gaseous fuel means natural gas or liquefied petroleum gas. Good engineering judgment has the meaning given in 40 CFR 1068.30. See 40 CFR 1068.5 for the administrative process we use to evaluate good engineering judgment

ger vehicles. This definition generally applies for model year 2027 and later vehicles. Methanol-fueled vehicle means any motor vehicle or motor vehicle engine that is engineered and designed to be operated using methanol fuel (i.e., a fuel that contains at least 50 percent methanol (CH3OH) by volume) as fuel. Model means a specific combination of car line, body style, and drivetrain configuration. Model type has the meaning given in 40 CFR 600.002 for LDV, LDT, and MDPV. Model year means the manufacturer's annual production period (as determined by the Administrator) which includes January 1 of such calendar year: Provided that if the manufacturer has no annual production period, the term “model year” shall mean the calendar year. Motor vehicle has the meaning given in § 85.1703 of this chapter. Multi-fuel means capable of operating on two or more different fuel types, either separately or simultaneously. Multi-fuel vehicle means any motor vehicle capable of operating on two or more different fuel types, either separately or simultaneously. Natural gas means a fuel whose primary constituent is methane. Nominal fuel tank capacity means the volume of the fuel tank(s), specified by the manufacturer to the nearest tenth of a U.S. gallon, which may be filled with fuel from the fuel tank filler inlet. Non-emission-related maintenance means that maintenance which does not substantially affect emissions and which does not have a lasting effect on the emissions deterioration of the vehicle or engine during normal in-use operation once the maintenance is performed. Non-integrated refueling emission control system means a system where fuel vapors from refueling are stored in a vapor storage unit assigned solely to the function of storing refueling vapors. Non-Methane Hydrocarbon Equivalent means the sum of the carbon mass emissions of non-oxygenated non-methane hydrocarbons, methanol, formaldehyde, or other organic compounds that are separately measured, expressed as gasoline-fueled vehicle hydrocarbons

porative emissions that emanate from a motor vehicle fuel tank(s) during a refueling operation. Refueling emissions canister(s) means any vapor storage unit(s) that is exposed to the vapors generated during refueling. Resting losses means evaporative emissions that may occur continuously, that are not diurnal emissions, hot soak emissions, refueling emissions, running losses, or spitback emissions. Revoke has the meaning given in 40 CFR 1068.30. Round (rounded, rounding) has the meaning given in 40 CFR 1065.1001, unless otherwise specified. Running change means a change to a vehicle or addition of a model which occurs after certification but during vehicle production. Running losses means evaporative emissions that occur during vehicle operation. SC03 means the test cycle, described in § 86.160-00 and listed in appendix I, paragraph (h), of this part, which is designed to represent driving immediately following startup. Scheduled maintenance means any adjustment, repair, removal, disassembly, cleaning, or replacement of vehicle components or systems which is performed on a periodic basis to prevent part failure or vehicle (if the engine were installed in a vehicle) malfunction, or anticipated as necessary from inspection to correct an overt indication of vehicle malfunction or failure for which periodic maintenance is not appropriate. Secondary air injection means a system whereby air (not ingested by the engine) is introduced into the exhaust system in front of a catalyst. Section 177 states means the states that have adopted California's motor vehicle standards for a particular model year under section 177 of the Clean Air Act (42 U.S.C. 7507)