Gear Cut/Blip on H-Pattern gearbox
Posted: Sun Jan 29, 2012 4:16 pm
All,
I have been thinking of a way to do a VERY simple implementation of Gear Cut/Blip on an H-Pattern gearbox.
At the moment there is a seperate Gear Cut Request and a seperate Gear Blip Request. This all works well on Sequential boxes where you can employ a proper load cell which gives for easy recognition since "Backwards" lever movement is UP a Gear and "Forward" lever movement is DOWN a Gear. However most people do not have such a gearbox and are still racing with H-Pattern Synchromesh gearboxes.
I think the following can be done:
- ADD a combined Gear Cut/Blip Request to the I/O (Keep the original ones for sequential racing gearboxes). The CLUTCH signal should be assigned HERE.
- ADD Code in the Processor which checks TPS/PPS to decide whether to do Gear CUT or BLIP based on settings.
- ADD a selector for TPS or PPS. PPS (DBW) should work nicer but TPS would also be OK on Cable-Throttle cars.
- ADD Gear Cut TPS/PPS Enable threshold (Adjustable). EG set to 10% (which means it is ACTIVE from 10% and higher)
- ADD Gear Blip TPS/PPS Enable threshold (Adjustable). EG set to 10% (which means it is NOT-ACTIVE from 10% and higher).
Now an example:
If you were on the track going into a corner with your foot OFF the throttle and pressed the Clutch ready to downshift you would get a BLIP since PPS/TPS is lower than 10%. When you are ON the throttle with PPS/TPS higher than 10% for example and press the Clutch you would get a Gear Cut.
In my opinion it should be pretty Bombproof. Especially on a DBW car where you can manipulate TPS without affecting PPS.
On Cable-Throttle cars there should be a Mask Time which prevents the Processor from checking TPS after it has made a decision and the Throttle Jacker is active UNTIL the CLUTCH is released which should RESET the mask and check again for current TPS, etc.
Cheers,
Jasper Kopinga
CS Racing
Taiwan.
I have been thinking of a way to do a VERY simple implementation of Gear Cut/Blip on an H-Pattern gearbox.
At the moment there is a seperate Gear Cut Request and a seperate Gear Blip Request. This all works well on Sequential boxes where you can employ a proper load cell which gives for easy recognition since "Backwards" lever movement is UP a Gear and "Forward" lever movement is DOWN a Gear. However most people do not have such a gearbox and are still racing with H-Pattern Synchromesh gearboxes.
I think the following can be done:
- ADD a combined Gear Cut/Blip Request to the I/O (Keep the original ones for sequential racing gearboxes). The CLUTCH signal should be assigned HERE.
- ADD Code in the Processor which checks TPS/PPS to decide whether to do Gear CUT or BLIP based on settings.
- ADD a selector for TPS or PPS. PPS (DBW) should work nicer but TPS would also be OK on Cable-Throttle cars.
- ADD Gear Cut TPS/PPS Enable threshold (Adjustable). EG set to 10% (which means it is ACTIVE from 10% and higher)
- ADD Gear Blip TPS/PPS Enable threshold (Adjustable). EG set to 10% (which means it is NOT-ACTIVE from 10% and higher).
Now an example:
If you were on the track going into a corner with your foot OFF the throttle and pressed the Clutch ready to downshift you would get a BLIP since PPS/TPS is lower than 10%. When you are ON the throttle with PPS/TPS higher than 10% for example and press the Clutch you would get a Gear Cut.
In my opinion it should be pretty Bombproof. Especially on a DBW car where you can manipulate TPS without affecting PPS.
On Cable-Throttle cars there should be a Mask Time which prevents the Processor from checking TPS after it has made a decision and the Throttle Jacker is active UNTIL the CLUTCH is released which should RESET the mask and check again for current TPS, etc.
Cheers,
Jasper Kopinga
CS Racing
Taiwan.