maxx air group's emission reduction technologies

Diesel Emissions Overview Phillip Surma

Bus Retrofit Overview

• Maxx Air Group Introduction

• Diesel Filter Technology Profiles

• Engine Performance Profiles

• DPF Selection

• DPF Tips

Maxx Air Group Introduction

• Maxx Air - West (California)– Sales, Installation, Service, DPF Cleaning

• Maxx Air – Midwest (Illinois)– Sales, Installation, Service

• Emission Control Technologies– R&D, Fleet Consulting & Management Services

• QuickClean – DPF manufacturing


• Consulting and Technical Expertise on All Types of Diesel Particulate Filter Systems

• Grant Application Assistance

• Data Logging and Opacity Testing

• Quality Installations • Maintenance Services • Diesel Particulate Filter Cleaning and

Testing


Product Portfolio

•Hug DPF Filter Systems

•ECS DPF Filter Systems

•KwickClean Filters

•Huss DPF Filter Systems

•CPK Data Loggers

•Diesel Pre-heaters

Diesel Filter Technology Profiles

DPF (substrate) Types•Partial or Flow Through Filters

•15% to 60%

•High Efficiency Wall Flow Filters

•85% to 98%


Regeneration Types

•Passive

•Passive / Active (engine on)

•Active (engine off)

•Off Line


Oxidation Catalysts (DOC)

A diesel oxidation catalyst consists of a stainless steel canister that contains a honeycomb structure called a substrate. The interior surfaces are coated with catalytic metals such as platinum or palladium. It is called an oxidation catalyst because the device converts exhaust gas pollutants into harmless gases by means of chemical oxidation.


Passive DPF

To facilitate decomposition of the soot, a catalyst is used in the form of a coating on the filter. Filters that regenerate in this so-called "passive" fashion cannot be used in all situations. Despite the high efficiency of the catalyst, a layer of ash may build up on the filter requiring replacement or servicing. The ash is made up of inorganic oxides from the fuel or lubricants used in the engine and will not decompose during the regular soot regeneration process.


Passive / Active (engine on)

In some applications or operating cycles, the exhaust never achieves a high enough temperature to completely oxidize the soot even in the presence of a catalyst. In these instances, an "active" regeneration system must be employed. Active regeneration utilizes a fuel injector nozzle upstream of the DOC element to heat the filter and oxidize the soot.


Engine off active regeneration utilizes a fuel burner or a resistively heated electric element to heat the filter and oxidize the soot. Active regeneration can be employed either in-place on the vehicle or externally.

Active (engine off)


Typical Active DPF installation


The filter element of the KwikClean soot filter consists of a ceramic fiber knitted mesh, reinforced with a stainless steel core. This design makes it resistant against high temperatures without losing its flexibility.The filter module is fitted into the filter housing and held by a quick-release clamp for easy change out.

Off-Line (Removable)

Engine Performance Profiles

Data Logging

•Data logging of the exhaust temperature, back pressure, and duty cycle is needed to determine the correct DPF technology for a given vehicle or group of vehicles in your fleet.

Engine Performance Profiles

High Heat & Heavy Duty Cycle

Low Heat & Light Duty Cycle

DPF Selection

Engine

ModelYear

TemperatureProfile

TechnologyType

Operator Interaction

In-UseRegeneration

NoOperator Action

15% - 40% Duty Cycle400-520o F

Engine onRegeneration

NoOperator Action

Engine OffRegeneration

RequiresButton Push

5%-15% ofDuty Cycle>360o F

TemperatureNot A or B “Low Temp”

1994 to 2006

(2012)<1994

RebuildRepowerReplace

EngineA

B

C

Passive

Passive/ Active

Active

CustomFilterSolution

DPF Tips

• Match the correct emission system to the engine/duty cycle

• Use pre-heaters in cold startup conditions – don’t idle for warm-ups

• Perform de-ashing service using manufacturers recommendations

• Correct installation = best system performance

Maxx Air Group

Thank you

maxx air group's emission reduction technologies

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