From the summary in section 2.2 in order to achieve combustion of diesel fuel in the PPC engines with compression ignition it. Need to be injected more fuel in advance at about 30 degrees before top dead Center (BTDC CA) so there are diesel fuel atomization the moment on mixing with the air, much much more. To expand the range of ignition which delayed research ever mentioned above. It can be seen that of ethanol fuel, typically a time of ignition long [20,] which is extremely suitable for combustion PPC.Mehrzad & Board [12, 34, 35] to study the impact of strategic changes, the injection of ethanol combustion air preheating PPC which are inward (Pre-heat) for strategic fuel injection (Injection strategy) will be divided into 2 main strategies, that is, the strategy for fuel injection (Single injection) fuel injection and strategies double (Double injection), which tests the burden of low and middle engine (Low and high engine loads of) by the given engine speed constant at the trials. A test engine is engine Scania D13 injections directly into the cylinder. There are 2 liters of displacement by using pure ethanol 99.5% lokwam fuel.From the experiment found that the rate of emission of heat (Heat release rate, HRR) of ethanol fuel injection strategies single range over combustion (Premixed combustion phase) but the quality of burning is controlled by mixing less (controlled Mixing combustion phase) strategies double fuel injection, combustion controlled by this combination is the help engine operating range (Operating conditions) From Figure 2.18 observed that the strategic one-time fuel injection combustion features that are appropriate to the limit during the fuel injection angles between 3 to 12 degrees before top dead Center (BTDC CA) if there is a fuel injection position closer to dead Center (TDC) too much to.The burning feature has a coefficient of variance of average effectiveness indicator (COV of IMEP) which represents stability, but if your engine has a fuel injection position in advance too much will result in a rate of change of pressure in the cylinder is high (pressure raise rate) and will result in interrupting more combustion (Combustion noise).
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