5.2.5
Conventional injection valve
The injection valves are installed in the cylinder cover of each cylinder. The injection valves
spray the fuel into the combustion chamber. The injection control unit (ICU) controls the timing
and the quantity of the injected fuel related to the power.
The high pressure of the supplied fuel from the ICU opens the needle in the nozzle body. This
lets the fuel flow through the holes in the nozzle tip (004,
) into the combustion
chamber as a spray. When the pressure from the ICU decreases, a spring closes the needle
again.
The nozzle usually has the Fuel Actuated Sacless Technology (FAST) for better combustion
properties.
A small quantity of fuel flows through the inner part of the valve to lubricate the needle. This fuel
then flows through the return pipe back to the plant fuel system.
Fig 5-11
Injection valve (example)
001
002
003 004
005
Legend
001
Nozzle holder
004
Nozzle tip
002
Coupling nut
005
Fuel inlet
003
Clamping nut
X92DF
AA00-2722-00AAA-043B-A
Operation Manual
Conventional injection valve
Winterthur Gas & Diesel Ltd.
- 166 -
Issue 002 2020-08
Содержание X92DF
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