Long project: ELITE. ELectronical Injection Timing Enhancement.
Long project: ELITE. ELectronical Injection Timing Enhancement.
The system I am doing a research for and already get some help for contains a harmonic drive, which incorporates kind of 3 rotating thingies:
1. A ring that will be connected to the chain gear
2. A ring that will be connected to the pump shaft
3. A shaft which:
- Stationary rotates as fast as 1. does
- When the timing needs to be altered, it rotates slower or faster. because of that, the angular refference between 1 and 2 alters.
Thus, there will be 3 angle sensors in the device. Or let's say 2: for the parts 1. and 2. .. and the electric motor which propels 3. by definition contains a sensor
So, Starynovy, you are right: feedback is necessary and must be done, but because of lack of the needle lift sensor, the angle sensors must be used.
About needle lift sensor:
I have a VW Scirocco mTDI with a 1Z engine, that used to be eTDI of course. And the engine has a needle lift sensor on the 3rd cilinder. The SOI (start of injection) is adjusted in the VE by means of rotating the roll carrier, and rotating happens by means of applying hydraulic pressure against a plunjes, and controlling that pressure happens by modulating a solenoid.
The MSA15 ECU for the 1Z contains a map that can control the modulation depending on the load and RPM ( 3D map of course). (can't find a suitable picture, sorry)
I also know that after for example a timing belt change, one must adjust the SOI in idle RPM with VAG-COM
![[Image: richstimingAug302014-L.jpg]](http://hikerinmaine.smugmug.com/Cars/VagCom-Stuff/i-bnBRSdK/0/L/richstimingAug302014-L.jpg)
Because just like with the line pump, the VE-pump is mounted with slotted holes, and rotating it means altering the angle.
BUT .. guys .. I honestly do not know whether the SOI is checked in a closed loop like Starynovy says. Because it can be.. but it also could be not as long as the engine is a standard engine, which can be an assumption in the factory, as it is forbidden to alter your stuff and blablabla
My idea with the phaser would be: When everything is done, make a map that just does the same as the mechanical centrifugal timing device.
Then, put the engine on a test bench... Let it turn with certain RPM and certain throttle position .. and then adjust the timing for maximum torque...
Evgeniy1987
09-22-2016, 11:31 AM #9About feedback:
The system I am doing a research for and already get some help for contains a harmonic drive, which incorporates kind of 3 rotating thingies:
1. A ring that will be connected to the chain gear
2. A ring that will be connected to the pump shaft
3. A shaft which:
- Stationary rotates as fast as 1. does
- When the timing needs to be altered, it rotates slower or faster. because of that, the angular refference between 1 and 2 alters.
Thus, there will be 3 angle sensors in the device. Or let's say 2: for the parts 1. and 2. .. and the electric motor which propels 3. by definition contains a sensor
So, Starynovy, you are right: feedback is necessary and must be done, but because of lack of the needle lift sensor, the angle sensors must be used.
About needle lift sensor:
I have a VW Scirocco mTDI with a 1Z engine, that used to be eTDI of course. And the engine has a needle lift sensor on the 3rd cilinder. The SOI (start of injection) is adjusted in the VE by means of rotating the roll carrier, and rotating happens by means of applying hydraulic pressure against a plunjes, and controlling that pressure happens by modulating a solenoid.
The MSA15 ECU for the 1Z contains a map that can control the modulation depending on the load and RPM ( 3D map of course). (can't find a suitable picture, sorry)
I also know that after for example a timing belt change, one must adjust the SOI in idle RPM with VAG-COM
Because just like with the line pump, the VE-pump is mounted with slotted holes, and rotating it means altering the angle.
BUT .. guys .. I honestly do not know whether the SOI is checked in a closed loop like Starynovy says. Because it can be.. but it also could be not as long as the engine is a standard engine, which can be an assumption in the factory, as it is forbidden to alter your stuff and blablabla
My idea with the phaser would be: When everything is done, make a map that just does the same as the mechanical centrifugal timing device.
Then, put the engine on a test bench... Let it turn with certain RPM and certain throttle position .. and then adjust the timing for maximum torque...
3 Guest(s)
3 Guest(s)