fuel injectors, pressure, power, and tuning
#22
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,040
Total Cats: 6,607
As RPM increases, cycle time decreases. So for a constant injector duration, duty cycle will increase proportional to RPM. Even if injector duration decreases slightly after peak torque, duty cycle will still continue to rise as duration will be decreasing by a relative small amount compared to the decrease in cycle time.
#23
No, max duration will typically be at peak torque. But think about what duty cycle is- it's duration / cycle time (the time elapsed for one full rotation of the crank, assuming two squirts per otto cycle.)
As RPM increases, cycle time decreases. So for a constant injector duration, duty cycle will increase proportional to RPM. Even if injector duration decreases slightly after peak torque, duty cycle will still continue to rise as duration will be decreasing by a relative small amount compared to the decrease in cycle time.
As RPM increases, cycle time decreases. So for a constant injector duration, duty cycle will increase proportional to RPM. Even if injector duration decreases slightly after peak torque, duty cycle will still continue to rise as duration will be decreasing by a relative small amount compared to the decrease in cycle time.
Thread
Thread Starter
Forum
Replies
Last Post