Why are ‘modern’ diesel engines much quieter and easier to start than those of yesteryear?
Pilot injection is a staple on a modern common rail diesel injection (CRDI) engine as it gives us the opportunity to make our diesel engines quieter, in particular at low RPM’s and idle by reducing the knocking sound caused by the compression-ignition process. In this video which is just one module from the Diesel Tuning Fundamentals course, we’re going to look at the audible difference in using a pilot pulse using our MoTeC M150 GPR diesel package ECU and 1KD powered Toyota Hilux.
As Andre notes, aftermarket ECUs are not common in the diesel tuning world, however, the concepts shown here are still the same and will translate over to other software applications.
While not touched on specifically in this lesson it is worth noting that while pilot pulse injection helps get rid of diesel 'knock' it is also responsible for helping diesel engines cold starting abilities equal that of gasoline engines, and can also help reduce harmful NOx (Nitrogen oxides) emissions by lowering peak combustion temperatures
0:00 - Equipment Used and Why
1:28 - The Vehicle
1:42 - Tables we’re working with
1:50 - 1st Pilot Pulse Worksheet
2:17 - Injection Timing
2:39 - 2nd Pilot Pulse Worksheet
3:11 - No Pilot Pulse Injection Example
3:38 - Adding Pilot Pulse
4:34 - Pilot Pulse Injection Example
4:48 - What Is Happening? - Data Analysis
5:57 - Conclusion
6:42 - Outro
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