Systems question for my exam on Monday
Hi all wonder if I could get some opinions please. I am going through some feedback for my systems on Monday and the following question has me wondering......
After the power stroke on a piston engine the poppet valve sequence is ?
A Exhaust open, inlet valvue open, exhaust valve close
C inlet valve opens, exhaust valve closes, inlet valve closes
answer says: A
Now if you think about theoretical otto cycle A is correct, but with the practical cycle as the exhaust valve opens before BDC of the power stroke the next lot of sequencing is option C.
so my question I suppose is, when does the power stroke end ? when it reaches BDC or when the exhaust valve is opens ?
I can't clearly find in my notes if the exhaust valve opening is part of power stroke or after power stroke.
Thanks in advance for any help