Request for proposal contract form for the transit industry



Download 1.87 Mb.
Page14/67
Date conversion17.10.2016
Size1.87 Mb.
1   ...   10   11   12   13   14   15   16   17   ...   67

Power Requirements


The propulsion system shall be sized to provide sufficient power to enable the bus to meet the defined acceleration, top speed and gradability requirements, and operate all propulsion-driven accessories using actual road test results and computerized vehicle performance data.

Top Speed


Default

The bus shall be capable of achieving a top speed of 65 mph on a straight, level road at GVWR with all accessories operating. The bus shall be capable of safely maintaining the vehicle speed according to the recommendations by the tire manufacturer.


Alternative

The bus shall be capable of achieving a top speed of 55 mph on a straight, level road at GVWR with all accessories operating. The bus shall be capable of safely maintaining the vehicle speed according to the recommendations by the tire manufacturer.


ALTERNATIVE

Agency to specify top speed limit. The bus shall be capable of safely maintaining the vehicle speed according to the recommendations by the tire manufacturer.



NOTE: Values are assumed to be sustained. Manufacturer shall supply Agency with data if there is a variance between peak performance and sustained vehicle performance.

Gradability


Gradability requirements shall be met on grades with a dry commercial asphalt or concrete pavement at GVWR with all accessories operating.

Default

The propulsion system shall enable the bus to achieve and maintain a speed of 40 mph on a 2½ percent ascending grade and 15 mph on a 10 percent ascending grade continuous.


Alternative

Agency will provide operating profile information to the Contractor.



NOTE: Values are assumed to be sustained. Manufacturer shall supply Agency with data if there is a variance between peak performance and sustained vehicle performance.

Acceleration

Non-Hybrid


The acceleration shall meet the requirements in Table 3below and shall be sufficiently gradual and smooth to prevent throwing standing passengers off-balance. Acceleration measurement shall commence when the accelerator is depressed.

TABLE 3

Maximum Start Acceleration Times on a Level Surface1



Speed (mph)

Maximum time
(seconds)


10

5

20

10

30

18

40

30

50

60

Top speed




1. Vehicle weight = GVWR

Acceleration Hybrid


The propulsion and braking systems shall meet the performance requirements of the Duty Cycle.

Braking application and performance shall remain consistent regardless of hybrid system state of charge (SOC) or other variances related to regenerative braking.

The system shall be programmable to allow optimization of acceleration and deceleration rate. Performance may be affected when reprogramming. The manufacturer shall supply the new performance data.

Acceleration (Commuter Coach)


The Contractor shall provide performance scans to the Agency based on the Agency’s specific drivetrain configuration.

Operating Range


The operating range of the coach shall be designed to meet the operating profile as stated in the “Design Operating Profile” section.

Diesel (Transit Coach)


Default

The operating range of the coach when run on the FTA ABD Cycle shall be at least 350 miles (560 km) or 20 hours with full fuel capacity.


ALTERNATIVE

Agency to designate operating range.



Diesel (Commuter Coach)


Default

A fuel tank with a minimum capacity 165 gallons shall be installed.


Alternative

Agency to designate operating range.


CNG


Default

The operating range of the coach when run on the FTA ABD cycle shall be at least 350 miles or 20 hourswith an initial gas-settled pressure of 3600 psi at 70°F.


Alternative

Agency to designate operating range.


Hybrid


Default

The operating range of the coach when run on the design operating profile “Design Operating Profile” shall be at least 350 miles on a full tank of fuel.


Alternative

Agency to designate operating range.


Fuel Economy (Design Operating Profile)


Test results from the FTA ABD Cycle economy tests or other applicable test procedures shall be provided to the Agency. Results shall include vehicle configuration and test environment information. Fuel economy data shall be provided for each design operating profile. The design operating profile is assumed to be defined by the FTA ABD Cycle.

Fuel economy tests shall be run on these four duty cycles:



  • Manhattan: 6.8 mph

  • Orange County: 12.7 mph

  • UDDS: 19 mph

  • Idle time

The Agency will provide a percentage of each duty cycle that is representative of its service.

POWERPLANT


Engine


The engine shall comply with applicable local, state and/or federal emissions and useful life requirements. The engine shall have a design life of not less than 300,000 miles without replacement or major service. The lifetime estimate is based on the design operating profile.

Note: For commuter coaches, minimum rating horsepower of 400 and minimum torque rating of 1400 ft-lbs shall be installed .

The engine shall be equipped with an electronically controlled management system, compatible with either 12 or 24 Vpower distribution. The engine control system shall be capable of transmitting and receiving electronic inputs and data from other drivetrain components and broadcasting that data to other vehicle systems. Communication between electronic drivetrain components and other vehicle systems shall be made using the communications networks. The engine’s electronic management system shall monitor operating conditions and provide instantaneous adjustments to optimize both engine and bus performance. The system shall be programmable to allow optimization of programmable features.

The engine starting system shall be protected by an interlock that prevents its engagement when the engine is running. Special equipment or procedures may be employed to start the bus when exposed to temperatures less than 30 °F for a minimum of four hours without the engine in operation. All cold weather starting aids, engine heating devices and procedures shall be of the type recommended by the engine manufacturer and approved by the Agency. The integration of all systems on the vehicle relative to engine idle speed shall be the responsibility of the vehicle manufacturer to meet the requirements of the transit property.

The engine control system shall protect the engine against progressive damage. The system shall monitor conditions critical for safe operation and automatically derate power and/or speed and initiate engine shutdown as needed.



Default

Automatic Engine Protection/Shutdown Override Feature

A control shall be available to the operator/driver that when constantly depressed and released will delay the engine shutdown or allow the bus to be moved. Override action shall be recorded. This data shall be retrievable by the Agency.
Alternative

No requirement for an automatic engine protection/shutdown override feature.


1   ...   10   11   12   13   14   15   16   17   ...   67


The database is protected by copyright ©ininet.org 2016
send message

    Main page