How does the MS3 make 1600 PSI fuel pressure?

[nocoastgangster]

If memory serves right average fuel pressure on a fuel injected car is 30-60 psi. I might be wrong. I read with the DISI the fuel arrives at the combustion chamber at 1600 psi. I was wondering if anyone can tell me how this is done? Is it a cracked out fuel pump, or some type of restriction in the fuel path?
Thanks,
Tim

 

[BradC]

Its similar to a common-rail diesel. All direct inj cars run this way. They use high pressure pumps and piezo injectors.

 

[benzo]

Second that!!!

 

[nocoastgangster]

Thanks for the information and quick response. Good starting point to go from.

 

[Brian MP5T]

Not really a starting point.. More like a Case Closed situation..

 

[vielster]

High Pressure Pump

The fuel pumps are actually mechanical, usually gear driven from the cam, or even direct from the crankshaft. It takes something like 2lb-ft to turn the pump, which if you do the math out, at speed, it's > 1.5kW, which would be over 100amps at 12VDC!!!

 

[nocoastgangster]

The fuel pumps are actually mechanical, usually gear driven from the cam, or even direct from the crankshaft. It takes something like 2lb-ft to turn the pump, which if you do the math out, at speed, it's > 1.5kW, which would be over 100amps at 12VDC!!!

I wish i'd taken a closer look at the cutaway display of the MZR at Zoom Zoom Live. Thanks for the information.

 

[got_titan]

good info!

 

[TheMAN]

The fuel pumps are actually mechanical, usually gear driven from the cam, or even direct from the crankshaft. It takes something like 2lb-ft to turn the pump, which if you do the math out, at speed, it's > 1.5kW, which would be over 100amps at 12VDC!!!

maybe if it was a big truck diesel with mechanical fuel injection

all of the mazda DISI fuel pumps are in the gas tank and ard electric

 

[vielster]

DI vehicles have two pumps. One is usually in the tank and the other is mechanical and at the engine. The reason there is a need for two pumps is that when the engine isn't spinning there is no way to pressurize the fuel system.

It's actually sorta tricky at startup because it takes a few rev's to actually get up to the 1000+psi of pressure

In order to flow >100lph at 1000+psi takes alot of power. We're talking on order of a kW which is just impossible to generate at 12VDC without a cable the size of your arm and an alternator the size of your spare tire.

maybe if it was a big truck diesel with mechanical fuel injection

all of the mazda DISI fuel pumps are in the gas tank and ard electric

 

[ssinstaller]

maybe if it was a big truck diesel with mechanical fuel injection

all of the mazda DISI fuel pumps are in the gas tank and ard electric

There is an electric intank pump that pressurizes the fuel to ~62 psi and sends it forward. The second (high pressure) fuel pump is driven off the intake camshaft it boosts the fuel pressure to between 435.2 and 1667 psi.

 

[nocoastgangster]

There is an electric intank pump that pressurizes the fuel to ~62 psi and sends it forward. The second (high pressure) fuel pump is driven off the intake camshaft it boosts the fuel pressure to between 435.2 and 1667 psi.

Man the technical detail is ******* great! If you had tits I'd married you yesterday!

 

[Focus]

I guess TheMan doesn't know it all ?

 

[Alejo_NIN]

wouldn't this mean more gas consumption?

 

[SeanMSIII]

Man the technical detail is ******* great! If you had tits I'd married you yesterday!

The breasts can apparently be grown with hormones, but without losing the rest of the package. You sure you want to sign up for that?

 

[nocoastgangster]

No just put some tits on a MS3. I'll send you a check.

 

[SeanMSIII]

No just put some tits on a MS3. I'll send you a check.

Interesting concept. Probably been done. Out of curiosity, where would you want them located?

 

[ForceFed]

I guess TheMan doesn't know it all ?

For once....He gets one wrong....Partially.

The world has come to an end and we will all die a slow horribble painful death now......Oh wait....
We were all doing that anyway.

That is all.