Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Standard</strong> <strong>Bus</strong> <strong>Procurement</strong> <strong>Guidelines</strong><br />
Baseline: <strong>Standard</strong> requirements for a fast<br />
idle device.<br />
The engine shall be equipped with an<br />
operator-controlled fast idle device. The fast<br />
idle control shall be a two-way toggle<br />
mounted on the dash or side console andThe<br />
device shall activate only with the<br />
transmission in neutral and the parking brake<br />
applied. This device may be used to help<br />
meet the requirements of bus cool down in<br />
Section 5.4.8.<br />
Baseline: No requirement for an auxiliary<br />
heater.<br />
Baseline: No<br />
requirement for an<br />
automatic engine<br />
protection feature.<br />
Alternative: Automatically activated fast idle.<br />
The fast idle device shall be activated and<br />
regulated automatically by the engine control<br />
system.<br />
Alternative: Auxiliary heater.<br />
An auxiliary heater fired by diesel fuel shall<br />
be provided to supplement the heat supplied<br />
by the engine and shall have an output of no<br />
less than 104,000 BTUs per hour necessary to<br />
meet the performance criteria specified in<br />
5.4.8.1. The heater shall be equipped with<br />
safety devices to prevent the following:<br />
overfueling, overheating due to loss of<br />
coolant or water pump failure, and operation<br />
during conditions of low battery voltage. The<br />
auxiliary heater shall be equipped with a selfpriming<br />
fuel pump.<br />
Alternative: Automatic engine protection.<br />
The engine control system shall protect the engine against<br />
progressive damage. The system shall monitor conditions critical<br />
for safe operation and automatically derate power and/or speed as<br />
needed. The on-board diagnostic system, as described in Section<br />
5.4.6.1.6, shall trigger a visual and audible alarm to the operator<br />
when the engine control unit detects a malfunction and the engine<br />
protection system is activated.<br />
Baseline: No<br />
requirement for<br />
an automatic<br />
engine<br />
protection<br />
override feature<br />
Alternative: Automatic engine protection<br />
override.<br />
A control shall be available to the<br />
operator, allowing him/her to override the<br />
engine protection system if additional<br />
engine power is required to move the bus<br />
in emergency conditions.<br />
Technical Specifications 134 10/18/07
Change language