Emissions and Exhaust Exhaust Emissions

Exhaust After treatment

Diesel Exhaust Fluid Injection

If required by the engine manufacturer to meet NOx level requirements specified by EPA, a DEF injection system will be provided. The DEF system will minimally include a tank, an injector, a pump, an ECM and a selective catalytic converter. The tanks shall be designed to store DEF in the operating environment described in the “Operating Environment” section.

DEFAULT

The DEF filler shall accommodate a standard nozzle. The nozzle shall automatically shut off when the tank is essentially full. The DEF filler cap shall be a screw-on cap and located curbside.

The DEF filler shall accommodate a nozzle that forms a locked and sealed connection during the refueling process to eliminate spills. DEF shall not be allowed to flow into the tank unless the nozzle has been properly coupled, locked and sealed to the filler. With the nozzle open, DEF shall enter the tank at a fill rate of not less than 5 gal per minute without causing the nozzle to shut off before the tank is 85 percent full. The nozzle shall automatically shut off when the tank is essentially 85 percent full. Once disconnected, fluid shall not be allowed to flow through the nozzle at any time. The filler cap shall be installed on the receiver.

The DEF fluid lines shall be designed to prevent the DEF from freezing. The DEF injection system shall not be damaged from a cold soak at 10 °F.

The DEF fluid lines shall be designed with heated lines for temperatures up to -20 °F.

An audible signal shall indicate when the tank is essentially full.

Particulate After treatment

If required by the engine manufacturer to meet particulate level requirements specified by EPA, a particulate trap will be provided. The particulate trap shall regenerate itself automatically if it senses clogging. Regeneration cycles and conditions will be defined by the engine manufacturer.

STRUCTURE

General

Design

The structure of the bus shall be designed to withstand the transit service conditions typical of an urban or intercity duty cycle throughout its service life. The vehicle structural frame shall be designed to operate with minimal maintenance throughout the 12-year design operating profile. The design operating profile specified by the Agency shall be considered for this purpose.

Altoona Testing

Prior to acceptance of first bus, the vehicle must have completed any FTA-required Altoona testing. Any items that required repeated repairs or replacement must undergo the corrective action with supporting test and analysis. A report clearly describing and explaining the failures and corrective actions taken to ensure that any and all such failures will not occur shall be submitted to the Agency.

Default

If available, the Altoona Test Report shall be provided to the Agency with the Proposal submittal. If not available, then the report shall be provided prior to first acceptance of bus.

Alternative

Altoona Test Report Provided to Agency Prior to Start of Bus Production

Prior to the start of any bus manufacturing or assembly processes, the structure of the proposed bus model shall have undergone appropriate structural testing and/or analysis, including the complete regimen of FTA-required Altoona tests. Prior to assembly of the first bus, the OEM shall provide the Agency with a completed report of Altoona testing for the proposed bus model, along with a plan of corrective action to address deficiencies, breakdowns and other issues identified during Altoona testing. The bus model tested shall match the bus model proposed for procurement, including structure, axles and drivetrain. Base model and partial Altoona test reports are acceptable when the combination of these tests adequately represents the proposed bus model.

Structural Validation

Default

Baseline Structural Analysis

The structure of the bus shall have undergone appropriate structural testing and/or analysis. At minimum, appropriate structural testing and analysis shall include Altoona testing or finite element analysis (FEA).
Alternative

Detailed Structural Analysis

The structure of the proposed bus model shall have undergone structural testing prior to assembly of the first bus. The OEM shall provide the Agency with completed reports of other structural tests as specified by the Agency.

Distortion

The bus, loaded to GVWR and under static conditions, shall not exhibit deflection or deformation that impairs the operation of the steering mechanism, doors, windows, passenger escape mechanisms or service doors. Static conditions shall include the vehicle at rest with any one wheel or dual set of wheels on a 6 in. curb or in a 6 in. deep hole.

Directory: resources
resources -> General text for tender (recommendations) for Pilkington Profilit™ Contents Page
resources -> North Carolina Inclusion Initiative Mapping Where Children with ieps are Being Served Purpose
resources -> Practice learning
resources -> The Rise of Video Games Section “Word” Matt Spencer
resources -> Request for Proposal [insert date]
resources -> The University of York 13th 16th April 2004
resources -> Biological and Biomedical Sciences Program Community Education Initiative
resources -> Region III standing regional response team (rrt) meeting williamsburg, Virginia Thursday, January 12, 2012
resources -> Efca eastern District and TouchGlobal, the crisis response ministry of efca
resources -> World Map 4 (1)-Global Warming

Download 1.87 Mb.

Share with your friends: