SIMULATOR INJECTOR 90 CC SPARK IGNITION ENGINE DENGAN MENGGUNAKAN METODE PENGATURAN WAKTU PEMBUKAAN INJEKTOR TERHADAP VOLUME INJEKSI BAHAN BAKAR

Merupakan salah satu bagian yang akan memberikan dampak tingkat efektifitas pembakaran terjaga berikut efisiensi pemakaian bahan bakar. Injector bekerja berdasarkan parameter kebutuhan kerja mesin yang tepat. Jumlah volume bahan bakar menjadi acuan dalam menjaga performa dari injektor, simulator Injector akan menginformasikan jumlah volume bahan bakar yang dapat dianalisa, dengan mendapatkan nilai Electronic Pulse Width Injector actual simulator dapat dijalankan, Electronic Pulse Width actual objek penelitian sebesar 2 ms-3 ms, laju bahan bakar Injector objek penelitian sebesar 90 cc/min pada tekanan 2,9 Bar, dengan F error rata-rata 9,44% yang dihasilkan oleh simulator, F Error > 10% simulator tidak dapat diterima, F Error < 10% maka simulator dapat digunakan untuk menganalisa volumetric dari Injector sehingga pada penelitian ini, memberikan solusi ketika kondisi aktual perawatan periodik didapatkan dengan memodelkan kondisi parameter kerja Injector tersebut di dalam kesatuan sistem sehingga pengukuran volume bahan bakar dapat dengan mudah dilakukan.

EQUIPMENT FOR THE STUDY OF DIVISION PROCESSES

This article is devoted to the study of the principles of operation of a pulsed ionization chamber, in which particles emitted from a target create a sequence of well-isolated current pulses (the distance between pulses is several times greater than their width). Firstly, using the Ramo-Shockley theorem, the mechanisms of forming signals on the electrodes of an ionization chamber with Frisch nets are considered, then it is shown how information on energy and spatial orientation of particles can be extracted from such signals using modern electronic pulse digitizers.

Control of the surface electron-beam alloying process by vibration monitoring

The experimental results prove the ability to realize technology of chemical heat treatment of some materials by surface alloying using a wide-aperture low-energy high-current electron beam. Doped hardened layers were produced due to initiating exothermic chemical reactions between the base and the thin film covered on it. Nevertheless, it is quite difficult to control the process of surface electron-beam alloying due to the significant variation in the parameters of the microsecond electron beam pulse and the instability of its interaction with the processed material. It leads to significant random changes that occur spontaneously, regardless of the control system. In this situation, it is proposed to use the method based on monitoring of oscillations and acoustic emission, which has long proved to be an effective tool in the study of phase transformations and plastic deformation. The appearance of a process with high vibroacoustic activity under irradiation of plates made of pre-nitrated steel 08Cr17Ti with a deposited film Nb70Hf22Ti8 in the range of 11–22 kHz 10 ms after the electronic pulse was experimentally shown on this background. The source of this vibroacoustic signal is a change in the microstructure of the alloy, including the appearance of a martensitic component in the near-surface layer of the sample caused by the formation of nitride based on niobium. Tracking changes in the effective value of the vibroacoustic signal allow choosing the rational modes of irradiation with electron-beam surface alloying, involving the supply of maximum power, limited by the possibility of evaporation of the film with alloying components.

Electronic Pulses from Pulsed Field Emission of CNT Cathodes

We presented a demonstration of infrared laser irradiated field emission electronic pulse based on carbon nanotube (CNT) cathodes. Electronic pulses greatly depended on pulsed infrared laser and were almost synchronous with laser pulses. We have designed a pulsed field emission cathode based on CNTs and investigated correlation between electronic pulse and laser pulse, acquiring the shortest width of electronic pulses about 50 ms and turn-on field less than 0.14 V/μm. Besides, we have studied the thermal effect on the pulsed field emission of CNT cathodes caused by laser heating. Interestingly, the thermal effect has caused an enhancement of emission current but resulted in a waveform distortion on short electronic pulses. The application of laser pulses on CNT cathodes would extend conventional electron sources to a pulsed electron source and offered a possibility of pulsed field emission. These results were encouraging us to prepare further studies of ultrafast electronic pulses for high-frequency electron sources.