Diesel engine starter torque
Diesel engine starter torque
(OP)
Is there a rule of thumb, or an existing data chart that will help determine the operating torque required, rpm and gear ratio (starter gear to flywheel gear) of pickup and light truck diesel engine starters?
I am particularly interested in the torque and rpm required to start diesel powered Ford, Chevy, GM and Dodge pickup and light truck engines.
I am particularly interested in the torque and rpm required to start diesel powered Ford, Chevy, GM and Dodge pickup and light truck engines.





RE: Diesel engine starter torque
I have them somewhere at the office. If GregL or one of the other actual auto guys doesn't chime in, and I remember, I'll post them next week.
RE: Diesel engine starter torque
RE: Diesel engine starter torque
Modern car engines seem to start at about 150 rpm, for what that is worth. My old Toyota will certainly /run/ at 300 rpm.
All the above is for SI engines, I would have thought diesels would be more complex.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Diesel engine starter torque
indicated horse power = m.e.p x LAN / 33000
where m.e.p is mean effective pressure
m.e.p = 3.534 x P1 x (r^0.283 -1)
and r = P2/P1
pressures are psia
L is piston stroke in feet
A is the piston area in squre inches
N is the number of effective strokes of piston per minute
This should at least get you in the ballpark.