Tesi etd-02022011-154106 |
Link copiato negli appunti
Tipo di tesi
Tesi di laurea specialistica
Autore
LANEVE, BIAGIO
URN
etd-02022011-154106
Titolo
Sistema Elettronico di Accensione con Moltiplicatore di Tensione per Motori ad Accensione Comandata
Dipartimento
INGEGNERIA
Corso di studi
INGEGNERIA ELETTRONICA
Relatori
relatore Baronti, Federico
relatore Prof. Roncella, Roberto
relatore Prof. Roncella, Roberto
Parole chiave
- accensione
- breakdown
- candela
- Cockroft
- combustione
- full wave
- half wave
- kicad
- labview
- matlab
- modelli
- moltiplicatore
- motori
- multiplier
- ottimizzazione
- scarica
- scintilla
- simulazioni
- spark ignition
- sperimentali
- spice
- Walton
Data inizio appello
25/02/2011
Consultabilità
Parziale
Data di rilascio
25/02/2051
Riassunto
The purpose of this thesis is to design and implement an innovative electronic ignition system for Spark Ignition Engines to reduce pollutant emissions.
The system uses a Cockroft-Walton voltage multiplier to generate the high voltage needed to trigger a discharge between the electrodes in the combustion chamber.
The goal is to provide just the energy required to phase of the breakdown (0.3 ÷ 1 mJ), thus avoiding the phases of arc and glow discharge that are mainly responsible for the consumption of the spark plug electrodes.
It was possible to achieve an optimized version of the multiplier from the study of voltage multiplier through simulations and simplified models, capable of reducing the rise time of the output voltage and increase the maximum value by reducing the voltage drop caused by the junction capacitance of the diodes in reverse bias. This allows the system to trigger a second spark and increase the probability that combustion process starts correctly, reducing emissions. A control logic, based on microcontroller and Labview interface for communication with the PC, allows to manage the generation of discharges according to the trigger signal sent from the electronic control unit. In addition, through a feedback path, created by a compensated voltage divider between the output of the multiplier and the ADC the microcontroller, it is possible to determine accurately whether the combustion was successfully initiated and at what discharge.
The system uses a Cockroft-Walton voltage multiplier to generate the high voltage needed to trigger a discharge between the electrodes in the combustion chamber.
The goal is to provide just the energy required to phase of the breakdown (0.3 ÷ 1 mJ), thus avoiding the phases of arc and glow discharge that are mainly responsible for the consumption of the spark plug electrodes.
It was possible to achieve an optimized version of the multiplier from the study of voltage multiplier through simulations and simplified models, capable of reducing the rise time of the output voltage and increase the maximum value by reducing the voltage drop caused by the junction capacitance of the diodes in reverse bias. This allows the system to trigger a second spark and increase the probability that combustion process starts correctly, reducing emissions. A control logic, based on microcontroller and Labview interface for communication with the PC, allows to manage the generation of discharges according to the trigger signal sent from the electronic control unit. In addition, through a feedback path, created by a compensated voltage divider between the output of the multiplier and the ADC the microcontroller, it is possible to determine accurately whether the combustion was successfully initiated and at what discharge.
File
Nome file | Dimensione |
---|---|
01capitolo1.pdf | 257.39 Kb |
02capitolo2.pdf | 352.29 Kb |
03capitolo3.pdf | 1.27 Mb |
04Capitolo4.pdf | 391.65 Kb |
05capitolo5.pdf | 255.64 Kb |
06capitolo6.pdf | 679.08 Kb |
07capitolo7.pdf | 772.25 Kb |
08capitolo8.pdf | 800.55 Kb |
09Conclusioni.pdf | 63.98 Kb |
10bibliografia.pdf | 24.82 Kb |
INDICE.pdf | 44.80 Kb |
Introduzione.pdf | 19.13 Kb |
1 file non consultabili su richiesta dell’autore. |