Transit Bus

Overview: Reduce Diesel Emissions from TRANSIT BUSES

Transit bus emission control system

Global populations experience diesel exhaust exposure every day through urban buses. Diesel retrofit emission mandates for the mass transit industry revolve around reducing toxic exhaust emissions that harm passengers and pedestrians.

An emission control system for the transit industry must also provide an effective solution with easy installation and optimization of vehicle uptime, while within a tight and fixed budget.


To find options for your diesel retrofit, browse the clean diesel technology listed below.

 

Diesel Retrofit Options for Transit

AZ Purifier Diesel Oxidation CatalystAZ Purifier Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
Diesel Oxidation Catalyst
Manufacturer: Engine Control Systems (ECS)

DOCs utilize a chemical process in order to break down pollutants from diesel engines in the exhaust stream, turning them into less harmful components. In this diesel retrofit, an AZ Purifier is installed upstream of the vehicle's original muffler, into a single integrated package, to reduce diesel emissions by an industry-leading, verified 20-40% (40% when paired with the Racor CCV).

AZ Purifier Specifications



AZ Purimuffler Diesel Oxidation CatalystAZ Purimuffler Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
Diesel Oxidation Catalyst
Manufacturer: Engine Control Systems (ECS)

The AZ Purimuffler utilizes the same DOC technology as the AZ Purifier, combining the AZ Purifier's catalyst and a silencer solution. The AZ Purimuffler can be designed as a direct fit replacement for the manufacturer's original muffler, meaning less down time & less invasive installation. The AZ Purimuffler can reduce diesel emissions by an industry-leading 20-40% (40% when paired with a Racor CCV).

AZ Purimuffler Specifications



Purifilter Diesel Particulate FilterPurifilter Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
Diesel Particulate Filter (Passive DPF)
Manufacturer: Engine Control Systems (ECS)

The Purifilter was the first passively regenerating DPF to attain an industry-leading 90% emissions reduction credit value. With a honeycomb design and Silicon Carbide filter substrate, it has a higher thermal conductivity than other traditional ceramics, higher temperature toleration, and superior noise attenuation comparable to high grade mufflers. The most efficient, durable, and quiet diesel retrofit.

Purifilter Specifications



MINE-X Diesel Particulate FilterMINE-X Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
Diesel Particulate Filter (Passive DPF)
Manufacturer: DCL International, Inc.

The MINE-X is a flow-through particulate filter that can reduce diesel emissions and lower backpressure more effectively than conventional wall-flow diesel particulate filters. This DPF removes up to 60% DPM and requires diesel fuel with sulfur content less than 500 ppm and works best with sulfur content less than 15 ppm (ULSD).

MINE-X Specifications



Purifilter Plus Diesel diesel particulate filterPurifilter Plus Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit
Emission Control System:
Diesel Particulate Filter (Passive/Active DPF)
Manufacturer: Engine Control Systems

The Purifilter Plus employs a passive Purifilter DPF to allow extended periods of passive operation, with periodic active regeneration at an optimal interval determined for your equipment. This combination eliminates the need to remove DPFs other than for de-ashing at 1500 engine hour intervals. This is the perfect diesel retrofit for high utilization fleets or rental construction fleets.

Purifilter Plus Specifications



HUSS MK Diesel Particulate FilterMK System Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
Diesel Particulate Filter (Active DPF)
Manufacturer: Huss

The MK System's active regeneration is executed by a powerful diesel burner, which works independently from the exhaust gas temperature. Depending on filter size, dpf regeneration takes between 5 and 45 minutes, supervised by the HUSS control. The high-tech LPS-SiC removes a verified 99.9% of the harmful soot particles from the exhaust gases, providing you with a dependable diesel retrofit.

MK-System Specifications



OEM Replacement DPF FiltersOEM Replacement Filters Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit
Emission Control System:
DPF Filters for Maintenance
Manufacturer: DCL International, Inc.

Our aftermarket filters are brand new (not reconditioned), built as direct replacements of OEM parts for easy installation, tested to produce the same emission reductions and same backpressure as original units, and can be cleaned in the same manner as an OEM part. Purchasing a spare filter will minimize vehicle downtime, optimizing the benefits of your diesel retrofit.

OEM Filter Specifications



Closed Crankcase Ventilation SystemClosed Crankcase Ventilation System Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit
Emission Control System:
Closed Crankcase Ventilation
Manufacturer: Racor

Unlike exhaust emissions, crankcase gases normally escape into the environment through the crankcase vent tube. The Racor CCV effectively eliminates 100% of crankcase emissions at all times, improving passenger compartment air quality, as well as air quality for personnel working in the vicinity of the operating equipment. Pair it with a DPF or DOC for the best combined clean diesel technology.

CCV Specifications




Thermo Top Webasto HeatersAir Heaters Stationary Engine Diesel Retrofit Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit Material Handling Diesel Retrofit
Emission Control System:
Idle Reduction Technology
Manufacturer: Webasto

Air heaters draw in ambient air, heat it, and blow it throughout the interior of the bus, providing a fast and efficient way of keeping drivers and passengers comfortable without idling. Webasto heaters include different Air Top heater models for small, medium, and large buses, that feature Eco, Boost, and Altitude modes, to provide more efficient operation.

Air Heaters & Specifications



Thermo Top Webasto HeatersCoolant Heaters Stationary Engine Diesel Retrofit Transit Diesel Retrofit Municipality Diesel Retrofit School Bus Diesel Retrofit Mining Diesel Retrofit Construction Diesel Retrofit Material Handling Diesel Retrofit
Emission Control System:
Idle Reduction Technology
Manufacturer: Webasto

Webasto coolant heating systems heat the cold coolant from the engine’s block, then pump it back to the bus’s engine and heat exchangers. Without idling, the preheated engine starts easily, consumes less fuel, and emits fewer pollutants. Webasto heaters for idle reduction include the Thermo Top C, Thermo 50, Thermo 90 ST, Thermo 230/300/350, DBW 2010, DBW 2020/300, and Scholastic Heater.

Coolant Heaters & Specifications