Fuel System
134 Fuel Delivery System
Common Rail Fuel Injection System (CRDI)
Fuel
temperature
sensor
Rail pressure
sensor
Water in fuel
sensor
Feed
pump
Injector
Common rail
High
pressure
pump
Main
fuel
filter
Pump
pressure
regulator
valve
Rail
pressure
regulator
valve
Fuel tank
Fuel feed (low)
Fuel feed (high)
Fuel return
return
return
return
return
Fuel
temperature
sensor
Rail pressure
sensor
Water in fuel
sensor
Feed
pump
Injector
Common rail
High
pressure
pump
Main
fuel
filter
Pump
pressure
regulator
valve
Rail
pressure
regulator
valve
Fuel tank
Fuel feed (low)
Fuel feed (high)
Fuel return
return
return
return
return
Low Pressure Fuel Circuit
Low Pressure Fuel Pump
The low pressure fuel pump is either an electric fuel
pump with pre-filter, or a gear-type fuel pump. The
pump draws the fuel from the fuel tank and continually
delivers the required quantity of fuel in the direction of
the high pressure fuel pump (via fuel filter).
Fuel Filter
The fuel filter is located in between the low pressure
fuel pump and the high pressure fuel pump and filters
the fuel delivered from the fuel tank.
High Pressure Fuel Circuit
High Pressure Fuel Pump
The high pressure fuel pump compresses fuel up to
1,600 bar and delivers the compressed fuel to the
common rail
Common Rail
The two common rails are installed on bank 1 and 2
and are connected with the high pressure fuel pump
and the injectors by the high pressure fuel pipes. This
rail stores the fuel compressed in the high pressure fuel
pump. So that the two rails have same fuel pressure,
the high pressure fuel pipe connects the two rails. The
ECM controls the fuel pressure of the common rail by
using the rail pressure sensor and the rail pressure
regulator valve installed on the common rail (Bank 1)
and (Bank 2) respectively.
Injector
The injector injects the high pressure fuel stored in the
common rail into the cylinder by the ECM control signal.
High Pressure Fuel Pump
The high pressure fuel pipe is a channel in high
pressure fuel circuit consisting of the high pressure fuel
pump, common rails, and injectors. It is a steel tube
which can withstand high frequency generated when
the fuel pressure reaches the maximum pressure or
fuel injection stops.
The differences in length between the common rail and
the individual injectors are compensated for by using
slight or pronounced bends in the individual lengths of
tubing. Nevertheless, the injection lines should be kept
as short as possible.
Содержание S220P
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Страница 5: ...Engine Mechanical System 4 General Information Specifications ...
Страница 10: ...Engine Mechanical System 9 Cooling System Special Service Tools ...
Страница 11: ...Engine Mechanical System 10 Cooling System Special Service Tools ...
Страница 18: ...Engine Mechanical System 17 Cooling System ...
Страница 19: ...Engine Mechanical System 18 Cooling System Thermostat ...
Страница 55: ...Engine Mechanical System 54 Lubrication System ...
Страница 73: ...Engine Electrical System 72 General Information Troubleshooting Charging system ...
Страница 74: ...Engine Electrical System 73 General Information Starting system Special service tools ...
Страница 75: ...Engine Electrical System 74 Charging System Charging system Alternator ...
Страница 80: ...Engine Electrical System 79 Starting System Components ...
Страница 91: ...Fuel System 90 General Information Special Service Tools ...
Страница 112: ...Fuel System 111 Diesel Control System EOI Engine Operating Indicator System Circuit Diagram 1 ...
Страница 117: ...Fuel System 116 Diesel Control System Specification Circuit Diagram ...