A New Feul useage control method!?!

[Roland Jacques]

Changing pump voltage will lower pressure below that which the regulator is designed to operate. Therefore disabling the fuel pressure regulator.
Normally fuel pump generates a higher pressure than is required and the fuel pressure regulator lowers the pressure to the required amount.
Adjustment can also be made with an adjustable fuel pressure regulator.

Yes, i also believe you are correct. the "Pressure regulator" is actually a pressure relief valve. Not truly a regulator but Press Reg is what they call it so... Anyway it seems one big con to lowering the pump voltage is that also lowers the ability to deliver enough volume of fuel in high demand times.

If we could simple lower the pressure by changing the PSI of the pressure regulator this could be better than playing with the pump voltage because the at least it would always have enough fuel. It seems like an adjustable pressure reg would worth trying.(If that is even doable?)



Thinking out loud here
If lower pressure equals lower volume of fuel & less atomization/larger droplets.
Larger droplets equals longer burn time.
Since HHO equals a faster burn time, and lower pressure, equals longer burn time, they could be a good match for our use.

[Madsceintist]

Summit Racing sells adjustable regulators, as well as any import performance shop. Problem with that is that a regulator is spring set and or spring set/vacuum controlled, which puts a major limit on your range. Springs have a certain range they work within, depending on the force applied. Vacuum assist gives some benefit as that the vacuum increases pressure by demand. Regardless if you eliminate a regulator in the system designed for one you don't get enough fuel when needed, thus to lean and starving for fuel. Also, its easier to adjust the voltage to the pump(which has a check valve to hold a minimal pressure), then to have a fully adjustable regulator on demand. Your not limiting the supply of fuel by reducing the pressure, just reducing the pressure, however you do limit the supply if there is no fuel!

Weapon_R
Because you reduce what the regulator can regulate, doesn't mean it's not working. A pressure regulator holds pressure UP TO a determined amount, then releases at that point to keep a specified pressure.
Unless you can program the ecm, cpu, cars computer then you can't stop the injectors from opening. If there's is fuel present under pressure or not it will enter through the injectors due to slight pressure that's inherent to a pumped system. I.E. back to the to lean and being starved condition.

[Madsceintist]

The adjustable pressure regulators are for race applications and such. Mostly for significantly raising the pressure for increasing power in performance cars.

[myoldyourgold]

How to regulate the fuel supply electronically has already been figured out. It is adjusting it to meet the changing load with a set volume of HHO that makes the electronics expensive and more complicated but methods that bring the cost down and complexity are being worked on. You have to remember that you have a constant given supply of HHO that does not vary and you have to keep the ratio of fuel to HHO the same, or at an optimum ratio, over most of the different load demands to make things work efficiently and effectively. If you had a reserve tank of HHO this would solve a number of problems but safety is the issue there making it impossible at the moment. I am working on electronic solutions coupled with other mechanical solutions and hopefully will eventually have a solution that will not cost an arm or leg and your first born. The first stage is ready for testing and even though it is only part of the total needed solution it will be able to give you above normal gains with little to no loss in performance and all done electronically with you driving normally with no need for you to adjust anything once set. The same type of electronics would be needed if adjusting the fuel pressure/volume, if this is a viable option, but in my understanding of things it is just adding another problem to the solution and upping the cost and possibly reducing the reliability of the whole system. In tank fuel pumps are not cheap!! Any extra stress on them and their life expectancy goes down. Some require removing the gas tank to change or service adding to the long term cost of things.

[myoldyourgold]

Here is a patent that should give you some information and describes some of the things you need to deal with.

http://www.google.com/patents/US5237975


Patent US5237975...
'Inventors'...Randal A. Betki
Thomas E. Wiseman
Brian C. Prodin
Stephen T. Kempfer
Michael R. Tinskey

A returnless fuel delivery control system is disclosed which regulates fuel rail pressure at the level needed for precise control of the fuel mass flow to the fuel injectors at both normal and elevated engine temperatures. This regulation is accomplished by precisely controlling the speed of the fuel pump motor as a function of the projected fuel demand based on engine rpm and injector pulse width. The projection is modified as a function of differetnial pressure error. The differential pressure error responds to a fuel temperature strategy which increases the the target differential pressure as a function of fuel temperature.

[Weapon_R]

Just to clarify. Fuel demand changes with load and rpm etc. Fuel pressure is adjusted to lean fuel within a small range for testing purpose only. So I may lower fuel pressure and drive or rev car to 1500 rpm not above. Above that and the engine will starve. Not very practical for daily driving but do able.
Best approach it to adjust fuel pressure based on demand. As demand increases so does fuel. As myoldyourgold has already said currently the is a costly venture but there may be a away around this. The technology is already available.

[Weapon_R]

The adjustable pressure regulators are for race applications and such. Mostly for significantly raising the pressure for increasing power in performance cars.

They can also be used to lower pressure. Most stock cars run fuel pressure 35 to 45 psi. Adjustable regulators can go as low as 1psi up to 140 psi. However and pwm on the fuel pump may be better for lowering fuel pressure. This will require constant manual adjustment if you operating at varying rpms and load.
You can also use map sensor voltage to control pwm but that is another story.

[Weapon_R]

Here is a patent that should give you some information and describes some of the things you need to deal with.

http://www.google.com/patents/US5237975


Patent US5237975...
'Inventors'...Randal A. Betki
Thomas E. Wiseman
Brian C. Prodin
Stephen T. Kempfer
Michael R. Tinskey

A returnless fuel delivery control system is disclosed which regulates fuel rail pressure at the level needed for precise control of the fuel mass flow to the fuel injectors at both normal and elevated engine temperatures. This regulation is accomplished by precisely controlling the speed of the fuel pump motor as a function of the projected fuel demand based on engine rpm and injector pulse width. The projection is modified as a function of differetnial pressure error. The differential pressure error responds to a fuel temperature strategy which increases the the target differential pressure as a function of fuel temperature.

This type of system is already in use by some major car manufacturers.

[Weapon_R]

Summit Racing sells adjustable regulators, as well as any import performance shop. Problem with that is that a regulator is spring set and or spring set/vacuum controlled, which puts a major limit on your range. Springs have a certain range they work within, depending on the force applied. Vacuum assist gives some benefit as that the vacuum increases pressure by demand. Regardless if you eliminate a regulator in the system designed for one you don't get enough fuel when needed, thus to lean and starving for fuel. Also, its easier to adjust the voltage to the pump(which has a check valve to hold a minimal pressure), then to have a fully adjustable regulator on demand. Your not limiting the supply of fuel by reducing the pressure, just reducing the pressure, however you do limit the supply if there is no fuel!

Weapon_R
Because you reduce what the regulator can regulate, doesn't mean it's not working. A pressure regulator holds pressure UP TO a determined amount, then releases at that point to keep a specified pressure.
Unless you can program the ecm, cpu, cars computer then you can't stop the injectors from opening. If there's is fuel present under pressure or not it will enter through the injectors due to slight pressure that's inherent to a pumped system. I.E. back to the to lean and being starved condition.

What I meant was that the pressure if below the cracking pressure of the regulator, then there will be no pressure to regulate.

[myoldyourgold]

This type of system is already in use by some major car manufacturers.

The patent I posted is owned by Ford.