An injector, ejector, steam ejector or steam injector is a pump-like device that uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy which creates a low pressure zone that draws in and entrains a suction fluid. After passing through the throat of the injector, the mixed fluid expands and the velocity is reduced which results in recompressing the mixed fluids by converting velocity energy back into pressure energy. The motive fluid may be a liquid, steam or any other gas. The entrained suction fluid may be a gas, a liquid, a slurry, or a dust-laden gas stream.[1][2]
The adjacent diagram depicts a typical modern ejector or injector. It consists of a motive fluid inlet nozzle and a converging-diverging outlet nozzle. Water, air, steam, or any other fluid at high pressure provides the motive force at the inlet.
The Venturi effect, a particular case of Bernoulli's principle, applies to the operation of this device. Fluid under high pressure is converted into a high-velocity jet at the throat of the convergent-divergent nozzle which creates a low pressure at that point. The low pressure draws the suction fluid into the convergent-divergent nozzle where it mixes with the motive fluid.
In essence, the pressure energy of the inlet motive fluid is converted to kinetic energy in the form of velocity head at the throat of the convergent-divergent nozzle. As the mixed fluid then expands in the divergent diffuser, the kinetic energy is converted back to pressure energy at the diffuser outlet in accordance with Bernoulli's principle.
Depending on the specific application, an injector is commonly also called an Eductor-jet pump, a water eductor, a vacuum ejector, a steam-jet ejector, or an aspirator.
~Berbalik kepada kereta aku... engine bernadi 4g92p telah dibekalkan oleh Proton dengan injector berkapasiti 182cc... utk meningkatkan keupayaan engine kereta aku telah menukarkan kepada daya pancutan yang lebih tggi... lebih bnyk minyak masuk lebih daya pembakaran... TETAPI peningkatan kadar kapasiti pancutan yang terlalu tinggi akan menyebabkan kereta anda kurang daya saing nyer akibat lebihan minyak serta tekanan yang berkurangan... kerana modifikasi yg terbaik adalah kadar campuran bahan api dan udara menepati sasaran penggunaan engine yang optimum....
~~Semula nya dari 182cc, sy telah meningkatkan keupayaannya kepada 240cc a.k.a injector dari jantung MIVEC.... setelah beberapa ketika sy menyedari akan ketidak sesuaian injector 240cc mivec terhadap engine sy pada masa itu... (Anda bole menggunakan injector yg tggi dengan syarat modifikasi terhadap engine anda juga tggi).... Apabila rpm kereta sy melebihi 5k RPM... satu perasan dimana kereta sy tidak lagi menerjah seperti yg sebelum nya...
~~~Walhal demikian akhirnya sy menukarkan injector yg berkapasiti 240cc kepada 210cc... prestasi kereta sy kembali pada tahap lama... (so ape guna tukar mende ni kalu prestasi sama?)... utk yg demikian... mungkin berlaku kekurangan tekanan atau sebagainya kepada engine sy ini... sy memilih utk menambahkan mekanisme baru kepada injector tersebut utk mengoptimumkan lagi keupayaanya.... mekanisme itu disebut FUEL PRESSURE REGULATOR a.k.a FR or FPR ( sy akan terangkan mekanisme ini dalam topik yg seterusnya)....
~~~~Namun, berdasarkan projek terbaru sy skrg ini... Injector 240cc mivec akan kembali kepada jantung kereta sy ini.... modifikasi yg ekstrem kali ni memerlukan pancutan minyak yg lebih bnyk bg memastikan kadar campuran angin dan minyak akan sama...
"HOPING MY PROJECT RUNNING WELL"
*182cc
*210cc
*credited to wikipedia
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