Diesel engines are different then gas. So running ATDC is common.
Diesel engines run injection timing at ATDC because:
Diesel engines run injection timing at ATDC because:
- The hot, compressed air already exists at that point.
- Injecting after TDC ensures fuel ignites immediately and combustion pushes the piston down effectively.
- It allows for optimal power, efficiency, and control of ignition delay under varying conditions blog.truegeometry.com+2.