Component Descriptions (Theory Of Operation); Diesel Oxidation Catalyst (Doc); Diesel Particulate Filter (Dpf); Maxxforce ® Dt, 9 And 10 - Navistar MaxxForce DT Diagnostic Manual

DIAGNOSTIC MANUAL

COMPONENT DESCRIPTIONS (THEORY OF OPERATION)

6.1. MAXXFORCE ® DT, 9 AND 10

1. Diesel Oxidation Catalyst (DOC)

Figure 13 DOC and DPF Assembly (MaxxForce® DT, 9 and 10 Engines)
Diesel Oxidation Catalyst (DOC)
The DOC does the following:
• Oxidizes hydrocarbons and carbon monoxide (CO) in exhaust stream
• Provides heat for exhaust system warm-up

Diesel Particulate Filter (DPF)

The DPF does the following:
• Captures and temporarily stores carbon-based particulates in a filter
• Allows for oxidation (regeneration) of stored particulates once loading gets to a particular level (restriction)
• Provides the required exhaust back pressure drop for engine performance
• Stores non-combustible ash
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2. Diesel Particulate Filter (DPF)