Fuel
System
The fuel system of the
standard genset includes: fuel tank, fuel supply pump, fuel filter, manual oil
pump, fuel injection pump, fuel injection nozzle and related oil pipeline.
Only fuels that meet the
quality specified in the following standards shall be used. It must be kept
clean during refuelling and fuel system operation. When working on the fuel
system, it must be confirmed that the engine has cooled down. The splash of
fuel on hot surface or electrical components may cause a fire.
Fuel
specification
The composition of the
diesel oil has a very important effect on the operation and service life and
the emission components of the diesel engine. In order to obtain the specified
power, fuel economy and the emission standards specified by the local
environmental protection department, only clean light fuel that meets
international and national standards should be used.
Light diesel oil is used
for fuel in high-speed diesel engines above 1000r/min. The current standard for
light diesel oil products is GB252-2000 "light diesel oil" standard.
The grade of diesel oil is based on the freezing point of diesel. Customers
should choose the appropriate diesel grade according to the temperature of the
workplace. (See Table 5.2)
Attentions
a. The fuel recommended
in the operating manual must be used. For diesel engines, the use of
low-quality fuel can cause the control rod to stick and the engine to rotate at
an excessive speed, resulting in damage to the generating set or even serious
personal injury. Inferior fuel will also shorten the maintenance cycle,
increase maintenance costs, and reduce the normal service life of the gen set.
b. When adding fuel,
there is usually a risk of fire and explosion. No smoking when refueling.
c. Do not allow the fuel
oil to overflow the fuel tank. The fuel tank cover should be sealed safely.
d. Water in the fuel can
cause corrosion of metal parts in the fuel system, and it can easily cause
fungi and microorganisms to grow in the tank, which can block the filter. When
the fuel water content is relatively large, it is recommended that the user
install a oil-water separator for the genset. Make sure that the fuel entering the
body is free of water or other impurities. All models of medium and high units
can be equipped with oil-water separators according to the requirements of
users. The oil-water separators are not part of the standard configuration when
the unit leaves the factory. When users need to order, it should be separately
stated.
Replace
fuel filter
a. Keep it clean and do
not allow any dirt to enter the fuel system.
b. In order to avoid
fuel splashing on hot surface and causing fire, the fuel filter replacement
must be carried out under the condition of cooling machine.
c. Remove the filter and
apply a little oil to the gasket of the new filter. Screw the filter by hand to
bring the gasket into contact with the seat. Then tighten again, do not screw
more, and exhaust the air from the fuel system.
d. Start the unit and
check for leaks.
Fuel
injection pump
a. The fuel injection
pump is driven by a timing gear transmission mechanism in the diesel engine.
The pump setting is measured with a lift meter when the base circle of a
particular crankshaft angle rises.
b. The fuel injection
pumps used in medium and high diesel generator sets are superior in quality and
reliable in performance, which can ensure the long-term normal use of users.
Fuel
spray nozzle
a. Equal distribution of
fuel oil for reliable ignition and combustion.
b. Inject fuel oil
directly into the combustion chamber and provide optimal mixture of fuel oil
and air. The injection pressure can be pre-adjusted by a spring.
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