Development of Future Technologies for High Thermal Efficiency Internal Combustion Engines

Research Prof. Eiichi Murase

Project name:

Development of Future ignition system

Project leader:

Research Prof. & Prof. Emeritus Eiichi Murase

Ito campus Open learning Plaza No.208
TEL:092-802-6906 FAX:092-802-6906
mail

Research Contents

In internal combustion engines, lean-burn is particularly attractive for minimizing pollutant emissions, in particular NOx, with a concomitant improvement in fuel economy, i.e., thermal efficiency. For combustion in lean fuel-air mixtures, achievement of adequate reliability of ignition and sufficiently high burning rate requires special devices.

Figure 1 shows the combustion initiated by the ordinary spark plug. The flame was slowly propagated spherically in the combustion chamber. The most effective among them is the injection of active radicals by means of PFJ (Pulsed Flame Jet) ignition system as shown in Fig. 2.The combustion test using PFJ was done in a constant combustion chamber or Rapid Compression Machine, using gas fuels such as methane or butane.

But here, the optical access real rotary engine as indicated in Fig. 3 will be used to investigate the ignition and the combustion using PFJ using liquid fuel such as gasoline. Therefore, in the PFJ, gasoline will be injected by the high pressure gasoline injector, and the electric spark occurred by the use of usual spark plug.

Fig.1 Combustion by the use of ordinary spark plug

Fig.1 Combustion by the use of ordinary spark plug

Fig.2 Pulsed Flame Jet Ignition

Fig.2 Pulsed Flame Jet Ignition

Fig.3 Optical access real rotary engine

Fig.3 Optical access real rotary engine

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