Yanmar Engine; Diesel Particulate Filter (Dpf) - Toro Groundsmaster 4300-D Service Manual

Yanmar Engine

Diesel Particulate Filter (DPF)

Regeneration
Groundsmaster ® 4300-D
16226SL Rev C
g188100
The engine used on your Groundsmaster 4300-D machine is a Yanmar TNV
Series, turbocharged, diesel engine that complies with EPA Tier 4F emission
regulations. The engine features include an electronic control unit (ECU) that
controls a common rail fuel injection system with direct injection, water-cooled
exhaust gas recirculation (EGR), an electronic governor, an exhaust system
diesel oxidation catalyst (DOC), an exhaust diesel-particulate filter (DPF) with
active regeneration, and a turbocharger to pressurize the air which flows into
the engine (the turbocharger is driven by a turbine that is energized by exhaust
gases). Glow plugs are used to assist starting the engine. Numerous engine
sensors are used to allow the engine ECU to monitor and control the engine
operation for optimum engine performance.
The engine ECU, combined with numerous engine sensors, monitor and control
the engine operation for optimum performance. During the operation of the
engine, if conditions warrant, the engine ECU may generate an engine fault. Use
the machine InfoCenter to identify the engine fault; refer to
(page 5–34), the Yanmar Troubleshooting Manual, or contact an Authorized
Toro Distributor for assistance.
The diesel particulate filter (DPF) used on Yanmar Tier 4F compliant engines is
designed to breakdown the hazardous elements in the exhaust and prevent the
discharge of unburnt fuel or oil known as particulate matter or soot. The DPF
includes a Diesel Oxidation Catalyst (DOC), a Soot Filter (SF), 2 temperature
sensors, and a pressure differential sensor. Additional information regarding the
Diesel Particulate Filter (DPF) can be found in the Yanmar Operation Manual -
Industrial Engines TNV supplied with your machine.
The engine ECU monitors the exhaust pressure before and after the soot filter
in the DPF to determine if soot is accumulating. If soot is accumulating during
normal engine operation, the pressure differential will increase. The increase
in pressure will signal the engine to begin a process called Regeneration.
Regeneration increases the exhaust temperature and the length of time the
engine operates at a higher than normal exhaust temperature, incinerating the
Figure 8
Page 3–5
Starting Problems
Diesel Engine: General Information