DIESEL PARTICULATE FILTER CLEANING

The advances that have resulted in the record yields and disease and drought resistance you enjoy on your farm today come at the expense of complexity. Similarly, efforts to reduce diesel emissions take many systems and service procedures to understand. In a profit-sensitive industry such as agriculture, it is critical that you do not allow emission controls to cause costly downtime or failure.

Depending on the application, hp and year of construction, modern diesel engines bear little resemblance to the past due to the integration of exhaust gas reduction devices. These systems are identified by acronyms such as EGR (Exhaust Gas Recirculation), DOC (Diesel Oxidation Catalyst), dpf emulator (Diesel Particulate Filter) and SCR (Selective Catalytic Reduction).

Egr dpf , SCR, DOC AND DPF STATEMENTS

EGR is an engine design feature that introduces inert exhaust gases into the combustion chamber to act as filler. This reduces the pressure and heat of combustion to reduce nitrogen oxide (NOx) emissions.

SCR further reduces NOx by injecting DEF (Diesel Exhaust Fluid), which is a special mixture of urea and water.

DOC is used to reduce carbon monoxide and hydrocarbon emissions along with sulfur-based particulates from exhaust gases. In simple terms, this is called diesel soot. The soot then enters the DPF where it is stored and burned at high temperatures. This turns the soot into ashes. Conversion occurs in the DPF, with heat generated in the DOC during a process called regeneration. Cleaning the DPF means emptying the filter (DPF is often referred to in the literature as a soot filter) because of the large amount of ash it can hold.