Long project: ELITE. ELectronical Injection Timing Enhancement.
Long project: ELITE. ELectronical Injection Timing Enhancement.
pretty interesting to see how people made it.Based on our calculation, I concluded together with the technical sales engineer that a sensor with up to 1.5 kHz response would be more than enough, and I ordered a sensor:
http://www.keller-druck.com/home_e/paprod_e/21y_e.asp
It is for sure not cheap, but hey .. everything for the science of STDs
It will take 4 weeks to deliver, but meanwhile I still need to source a bunch of injector lines, let them be modified .. and make a small block for the sensor to attach.
By the way, I am most likely not going to choose a phase, but build one myself. As basis, a Harmonic Drive from http://harmonicdrive.de/en/home/ will be taken
The engineer there is very very helpfull and is going to assist me in choosing the right HD after I will complete the measurements.
If somebody is interested: Harmonic Drive is fascinating
Look very carefully.
The chain-gear-sprocket will be attached to the RING SPLINE (RS)
The pump will be attached to the FLEX SPLINE (FS)
The motor that will control the phasing will be attached to the WAVE GENERATOR (WG)
now, the most important thing comes:
When the WG rotates with the same speed as the RS, there is NO CHANGE in angular position of all the 3 components, but most interesting the RS and the FS, which means timing keeps being the same.
When there is some SPEED DIFFERENCE between WG and RS, there will be speed difference between FS and RS as well, BUT including the ratio!! And there are ratios up to 160 possible. So 160 relative turns of WG to RS will lead to one turn between FS and RS. ( one turn is already too much for us)
The gear ratio also makes the life easier for the electric motor: Torque of the electric motor is multiplied by that factor. This is why the look so tiny: they can be so tiny, probably 1 Nm electric motor is more than enough.
So, in how the car works:
During constant speed/load, the electric motor is rotating with exactly the same speed as the pump chain sprocket. The pump injects fuel at the right timing.
When motor speed and/or load changes, the electric motor will accelerate or break the WG a little bit, causing relative angle change between RS and FS, which means altering the pump timing.
Accelerating and braking will be difficult because of PI-control and stuff ... but hey, the whole life is not easy
Evgeniy1987
09-27-2016, 01:31 PM #19Starynovy, thanks for the table pretty interesting to see how people made it.
Based on our calculation, I concluded together with the technical sales engineer that a sensor with up to 1.5 kHz response would be more than enough, and I ordered a sensor:
http://www.keller-druck.com/home_e/paprod_e/21y_e.asp
It is for sure not cheap, but hey .. everything for the science of STDs
It will take 4 weeks to deliver, but meanwhile I still need to source a bunch of injector lines, let them be modified .. and make a small block for the sensor to attach.
By the way, I am most likely not going to choose a phase, but build one myself. As basis, a Harmonic Drive from http://harmonicdrive.de/en/home/ will be taken
The engineer there is very very helpfull and is going to assist me in choosing the right HD after I will complete the measurements.
If somebody is interested: Harmonic Drive is fascinating
Look very carefully.
The chain-gear-sprocket will be attached to the RING SPLINE (RS)
The pump will be attached to the FLEX SPLINE (FS)
The motor that will control the phasing will be attached to the WAVE GENERATOR (WG)
now, the most important thing comes:
When the WG rotates with the same speed as the RS, there is NO CHANGE in angular position of all the 3 components, but most interesting the RS and the FS, which means timing keeps being the same.
When there is some SPEED DIFFERENCE between WG and RS, there will be speed difference between FS and RS as well, BUT including the ratio!! And there are ratios up to 160 possible. So 160 relative turns of WG to RS will lead to one turn between FS and RS. ( one turn is already too much for us)
The gear ratio also makes the life easier for the electric motor: Torque of the electric motor is multiplied by that factor. This is why the look so tiny: they can be so tiny, probably 1 Nm electric motor is more than enough.
So, in how the car works:
During constant speed/load, the electric motor is rotating with exactly the same speed as the pump chain sprocket. The pump injects fuel at the right timing.
When motor speed and/or load changes, the electric motor will accelerate or break the WG a little bit, causing relative angle change between RS and FS, which means altering the pump timing.
Accelerating and braking will be difficult because of PI-control and stuff ... but hey, the whole life is not easy
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