08-037-VEH: OOSC, Parte II, Punto 3. Sistemas de escape, b. Fugas de escape en autobuses

Fecha de registro	15 de agosto de 2008
Número de asunto	08-037-VEH
Nombre	Timothy P. Davis
Agencia	Massachusetts Department of Public Utilities
Dirección	1 South Station - 2nd FloorBoston, MA, 02110United StatesVer en el mapa (se abre en una pestaña nueva)
Teléfono	(617) 305-3773
Fax	(617) 478-2598
Correo electrónico	[email protected]
Comité	Comité de Vehículos
Estado	Cerrado
Resumen del asunto	Es necesario corregir los North American Standard Out-of-Service Criteria para sistemas de escape. En el apartado 3.a. de los OOSC, se permite que los gases de escape de los motores diésel se filtren debajo del área del conductor. El apartado 3.b. permite que los gases de escape de los motores diésel y de gasolina se filtren a menos de 38 cm (15 pulgadas) de la parte trasera del autobús. La norma 49CFR 393.83 ya no establece esto.
Justificación o necesidad	La OOSC no debe estar en conflicto con las regulaciones federales.
Solicitud de acción	La sección sobre el sistema de escape debe reescribirse para que refleje la redacción actual de la normativa. También se podría aprovechar la oportunidad para incorporar las normas canadienses.
Medidas adoptadas por el comité	This issue was sent to the Vehicle Committee (VC) by the Passenger Carrier Committee (PCC) based on revisions previously approved by the PCC. The PCC had already voted to a change to add a diesel exhaust system leak condition to gasoline exhaust leaks to the OOS in 3.b. by removing ?or diesel engine? from the last sentence in the paragraph. The VC was asked to support the change and to consider similar revisions for other vehicles. The VC considered the fact that while there is a much lower level of CO in diesel exhaust, there are still enough toxic substances that a driver who was exposed to the exhaust fumes for any extended period was likely to become impaired due to illness. It was also discussed that this type of leak had been removed from the OOSC approximately 10 years ago based on the fact that a person will not die from CO fumes. The PCC provided information in regard to the dangers of CO fumes and after some discussion, the VC passed a motion to revise the section to address an exhaust leak that is combined with an entry point for all vehicles. The revised wording shown below incorporates the changes approved by the PCC and VC. Revised Wording: a.Any exhaust system leaking at a point forward of or directly below the driver/sleeper compartment and the vehicle has a condition that permits entry of exhaust fumes into the driver/sleeper compartment. (393.83(g)) b. Any bus exhaust system leaking or discharging under the chassis more than 6 inches (15.24cm) forward of the rear most part of the bus when powered by a gasoline engine, or more than 15 inches (38.1cm) forward of the rear most part of the bus when powered by other than a gasoline engine. (393.83(d))

Fecha de registro

15 de agosto de 2008

Número de asunto

08-037-VEH

Nombre

Timothy P. Davis

Agencia

Massachusetts Department of Public Utilities

Dirección

1 South Station - 2nd FloorBoston, MA, 02110United StatesVer en el mapa

Teléfono

(617) 305-3773

Fax

(617) 478-2598

Correo electrónico

[email protected]

Comité

Comité de Vehículos

Estado

Cerrado

Resumen del asunto

Es necesario corregir los North American Standard Out-of-Service Criteria para sistemas de escape. En el apartado 3.a. de los OOSC, se permite que los gases de escape de los motores diésel se filtren debajo del área del conductor. El apartado 3.b. permite que los gases de escape de los motores diésel y de gasolina se filtren a menos de 38 cm (15 pulgadas) de la parte trasera del autobús. La norma 49CFR 393.83 ya no establece esto.

Justificación o necesidad

La OOSC no debe estar en conflicto con las regulaciones federales.

Solicitud de acción

La sección sobre el sistema de escape debe reescribirse para que refleje la redacción actual de la normativa. También se podría aprovechar la oportunidad para incorporar las normas canadienses.

Medidas adoptadas por el comité

This issue was sent to the Vehicle Committee (VC) by the Passenger Carrier Committee (PCC) based on revisions previously approved by the PCC. The PCC had already voted to a change to add a diesel exhaust system leak condition to gasoline exhaust leaks to the OOS in 3.b. by removing ?or diesel engine? from the last sentence in the paragraph. The VC was asked to support the change and to consider similar revisions for other vehicles. The VC considered the fact that while there is a much lower level of CO in diesel exhaust, there are still enough toxic substances that a driver who was exposed to the exhaust fumes for any extended period was likely to become impaired due to illness. It was also discussed that this type of leak had been removed from the OOSC approximately 10 years ago based on the fact that a person will not die from CO fumes. The PCC provided information in regard to the dangers of CO fumes and after some discussion, the VC passed a motion to revise the section to address an exhaust leak that is combined with an entry point for all vehicles. The revised wording shown below incorporates the changes approved by the PCC and VC.

Revised Wording: a.Any exhaust system leaking at a point forward of or directly below the driver/sleeper compartment and the vehicle has a condition that permits entry of exhaust fumes into the driver/sleeper compartment. (393.83(g)) b. Any bus exhaust system leaking or discharging under the chassis more than 6 inches (15.24cm) forward of the rear most part of the bus when powered by a gasoline engine, or more than 15 inches (38.1cm) forward of the rear most part of the bus when powered by other than a gasoline engine. (393.83(d))