New to forum / Custom WI system for AUDI

[simple]

Hello Richard,

Re: test, I can test as per your instructions ? no problem.
However I did not order accumulator with you when ordered goods. As far as I know all what coming is:
1) 3 x 0.3 nozzles (threaded type) 4mm
2) 1 x 0.6 nozzle thereded type 806-309
3) 2 x Filter: 6mm hose. #806-257
4) 2 x Flow valve (not HSV): part number 806-234
5) 2 x Tank fitting: #806-270
6) 2 x HSV (806-244)
7) 4 x Nozzle adaptor with blanking plug 806-357
Please clarify!

I do not use Shurflo pump, instead I run China made (same as Shurflo) copy of Shurflo. Therefore operating parameters as well as results can be slightly different.
I can test 0.3 or 0.6 nozzle for you on my pump with or without accumulator for water delivery and voltage/current ratio when I will receive the goods. Please remember that I feed pump via Switch Mode Power Supply (SMPS) not PWM during my test. However I do not think PWM will perform any different to SMPS (according to my knowledge).

Please explain more detailed meaning of ?cam angle of the pump?.

Your set up as per posted picture of the pump and accumulator look very good as you have accumulator as close to the pump as possible using maximum diameter fitting.

[Richard L]

I will send you an accumulator if you like - in return or the test you are performing for me.

If you can stick to the same nozzle as your used before, it will be fine.
Shurflo as three cam profiles, cam angle dictates the flow and pressure. 2 deg, 2.5 and 3 deg.

If you detatch the motor from the pump head (three bolts), the cam angle is cast on the pump head part. This is very impotant as using the wrong motor may cause premature thermal cutout sensed by the internal thermal switch. All these information is based on the original shurflo specification, not sure if this applies to the copy.

Switch mode PSU is great, if you could test in 1 volt increments, it will be great, If you also record the current drain, you only need to do the test once. All I need is the pressure, I can calculate the flow from pressure.

Thanks.

Richard


Richard

[simple]

Richard,
Test is easy; I will get it done for you.
My current test was based on ceramic nozzle (0.3) flowing about 400cc @150PSI (as per graph in earlier post).
As for pump, this is the picture of internals after aggressive test we performed using acid:



Vendor incorrectly stated that pump suitable for acidic environment, so ? we tested it in solution of HCL. Pump lasted about 10 minutes. I have not seen any indication of cam angle, but can tell you that pump run cool and barely warms up during the test. So far I did not manage to get it over 30-40 degree C. I will search for cam ange one more.

Pump specs 5.5L/160PSI (12VDC/10.6Amp)

Please let me know if hardware is sutable to perform the test you want....

[Richard L]

WOW, specular !

This pump is not a copy of the Shurflo pump but a copy of a flojet pump. Shurflo has a three chambers and flojet has four. This is a flojet copy.

The cam angle is normally on the face of the head, between the motor and the light tan part.

Could you take a picture of the other side of the light tan part?

I would still like to test to go ahead if possible.

Richard

[simple]

Richard,
All parts just come in - thank you. Can you email me copy of origional invoice as i need to brake down the cost?
I will follow up with vendor about cam angle.
I will do the test for you as soon as i will get accomulator, unless you want me to test it with my home-made accomulator

[Richard L]

The test has to be done without an accumulator.

Your invoice should follow a few days on. We always send it separately.

Richard

[simple]

Sorry Richard, my English is pretty bad and I misunderstood your offer.
You offering to send me an accumulator as a gift for a test I will perform for you, am I correct?
I will do the test as per your request ether way. I found you been helpful and will return the favor.


Please check test summary:
Current pump I have (160PSI max)
0.3 Aquamist nozzle or my original ceramic nozzle?
No surge arrestor.


Data needed:
Relationship- Voltage VS Amperage VS Flow/m

[Richard L]

Yes, an accumulation for your work. Advice is free for all, only on topics I know.

Please use the ceramic nozzle. This is because I have read all the previous test already so I have the basics.

your summary is absolutly correct:
Please check test summary:
- Current pump I have (160PSI max)
- my original ceramic nozzle
- No surge arrestor.
- pressure vs volt/current
- in one volt steps will be fine.

[simple]

Richard,

This is how I set all up:



Those are results:


Volt Amps.....PSI.........Water delivery cc

1.5.....3.6......40-50..........180
2........5.7.....50-65...........220
2.6.....6.8.....70-90...........280
3........7.5.....80-100.........300
4........8.3.....100-130.......335
4.5.....8.3......120-150.......350
5........9.2......125-160.......370
5.5.....9 ........135-170.......380
6........9 .......140-170........390
7........9 ........140-180.......390

System variables:
Voltage accuracy 0.1V
Amperage accuracy 0.1A
Pressure accuracy (non-calibrated gauge, suspect 10%)
SMPS used ? High power 70Amp/24VDC supply
Water capacity measurement accuracy 10cc
Water loss thry mist expected 1-2%
Nozle used 0.3 ceramic type

Comments:
Over all I am not happy with the test and will perform second test in 3-4 days to confirm all figures. My problem is that during low voltage range 1-2VDC pump was producing non-repetitive results and figures used to ?float? if I repeat the test.
Second problem is that at almost full pressure 6-7VDC there are no increase in pressure instead there is increase in pressure variation!

I will perform more accurate test with repetitive data collection and will do few changes in hydraulics system to double check results. As at this stage this is all I got.

[simple]

Richard,
We are now looking on driver circuitry for HSV. It is way more involved than I have expected. I was advised to have it done with current sensing feedback and controllable feed not to mention special discharge circuit which create ?dead short? across the HSV coil to reduce 2mS delay. In order for us to do it properly I need to know "hold" voltage for HSV! We plan to ?spike? 12-13VDC and then reduce the voltage for ?hold? time. What voltage is recommended for ?hold?? Or it is matter of testing?