obanion
Automotive
- Jan 1, 2004
- 101
Do modern champ car and/or F1 engines use a throttle?
I noticed they seem to be either in full power mode, or on some some of rev limiter. Coming out of the pits, they are bouncing off a rev limiter to stay under pit speed, rather than just having less power output from a mostly closed throttle butterfly. Also, they don't seem to idle steady either, seems like a rev limiter is used to keep idle speed.
Also lack of any blow off valve (never heard any anyway) on the champ car turbo engines leads me to think maybe they don't have a throttle.
Is this perhaps a suitable way to run throttleless, on a drag strip car? Obviously not very feasible for driving to work.
The idea is like this. Fuel injection events are set to full or slightly leaner than stoich. Throttle input (electronic), would incrementally control a soft fuel rev limiter. At 0% throttle, 60-70% of the fuel injection "squits" would be skipped, keeping the engine at a idle speed. As you increase throttle input, the % of skipped squirts would go down, increasing power output. By 100% throttle, there would be no skipped squirts.
Would operating a engine this way damage it from the unbalanced operation? Or would it be ok as the skipped squirts will move around between cylinders constantly?
I noticed they seem to be either in full power mode, or on some some of rev limiter. Coming out of the pits, they are bouncing off a rev limiter to stay under pit speed, rather than just having less power output from a mostly closed throttle butterfly. Also, they don't seem to idle steady either, seems like a rev limiter is used to keep idle speed.
Also lack of any blow off valve (never heard any anyway) on the champ car turbo engines leads me to think maybe they don't have a throttle.
Is this perhaps a suitable way to run throttleless, on a drag strip car? Obviously not very feasible for driving to work.
The idea is like this. Fuel injection events are set to full or slightly leaner than stoich. Throttle input (electronic), would incrementally control a soft fuel rev limiter. At 0% throttle, 60-70% of the fuel injection "squits" would be skipped, keeping the engine at a idle speed. As you increase throttle input, the % of skipped squirts would go down, increasing power output. By 100% throttle, there would be no skipped squirts.
Would operating a engine this way damage it from the unbalanced operation? Or would it be ok as the skipped squirts will move around between cylinders constantly?