Diesel Generator Direct Injection Is Better or Electronic Injection
by Starlight Generator dieselgeneratortechDifference between diesel
generator direct injection and electronic injection
Direct injection in the
engine cylinder: The technology of direct injection of fuel into the cylinder
and mixing with the intake air is to directly press the diesel into the
cylinder of high temperature and high pressure, so that the diesel can
spontaneously ignite and push the piston to move, thus achieving the working
operation of the engine. Compared with the EFI engine, the direct injection
engine consumes more fuel, the noise is loud, the combustion is insufficient,
and the exhaust emission pollution is higher.
Engine EFI: The diesel
engine that uses electronically controlled fuel injection and emissions is an
EFI diesel engine. According to the diesel engine status signal, the electric
control calculates the injection quantity and injection timing required for
each cylinder of the engine, and injects the diesel fuel into the cylinder for
atomization through the injector under a certain pressure. It mixes with the
air stream of the intake air and enters the combustion chamber to ensure that
the engine and catalytic converter are always working at their best, but parts
such as the spark plug need to be replaced more frequently.
Direct injection: daily
maintenance cost is low, the engine torque is large, and the power is
sufficient. Disadvantages: Poor diesel can be used. The fuel supply causes the
carbon accumulation in the cylinder to increase, the power and speed is reduced,
and it is not easy to ignite.
EFI (Electronic Fuel
Injection): good matching with the hydraulic system, three more high-pressure
oil injection than direct injection, stable power generation, the disadvantage
is that the diesel oil requirements are high.
Environmental
protection: direct injection engine has strong adaptability to oil products,
but the fuel can not be completely burned, the oil consumption is large, and it
is not environmentally friendly; the electronic injection type has high requirements
on oil products, sufficient fuel, low displacement, energy saving and
environmental protection.
The direct injection
engine is a traditional engine. Its fuel injection to the system depends only
on the system pressure generated by the engine working under different working
conditions. The fuel supply system performs fuel injection on the engine
working under different working conditions according to the working pressure,
that is to say, the fuel supply of the direct injection engine depends only on
the system pressure, so it is easy to cause the fuel which can not be
accurately supplied according to different working conditions, affecting the
normal operation and service life of the engine.
However, the modern EFI
diesel engine just uses the modern computer control technology to solve the
shortcomings of the traditional diesel engine. It makes good use of sensor
detection technology (sensor) to detect the working state of the engine under
different working conditions, such as pressure, temperature, air intake, etc.,
and sets the most reasonable working pressure and the fuel needed of the system
under different working conditions in advance in the computer. In this way, the
computer can monitor various data of engine operation under different working
conditions in real time, and accurately supply fuel according to different
working conditions, and make the system fuel supply not depend on the system
pressure, but depends on the fuel supply time, that is, the engine working
conditions determined by the computer based on the monitoring data are
connected to the electric pulse of the injector. (In the EFI diesel engine, the
injector is not turned on like a traditional pressure, but becomes an
electromagnetic type injector. Depending on the electromagnetic force to turn
on.) This achieves the effect of fuel economy and noise reduction, and also
prolongs its service life.
Customers will choose
different types of fuel injection engines according to their actual needs.
There are many ways of engine fuel electric injection. The most common one is
the electronically controlled high pressure common rail technology.
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Created on Nov 13th 2019 20:58. Viewed 417 times.