Intelligent Fuel Trimmer (made by hameed)

[hameeds01]

AoA Guys
i come up with a new device "Intelligent Fuel Trimmer" i dont know if it exist or not but its my own idea very much own.

As we know most of the JDM vehicles dont perform well on our local low grade fuel which leads to poor mileage, knocking & stuff like that. As they are tuned on Japanese fuel & there is no way to adjust the fuel ratio or maps so most of them run rich like hell.

I have made a device "Intelligent Fuel Trimmer" which intelligently controls the amount of Fuel based on Engine Speed, Load & User settings. Thanks to the intelligent Complex Algorithm.

The device is still in Testing phase + its a Prototype version thats y the size is big, once i get satisfied with its performance then i will think further.

The Biggest advantage of this device is that no wire cutting is required, grip to grip wire connections. It can support any EFI Engine 1 to 4 cylinders batch or sequential injector firing. This device intelligently adjusts Stoichiometric ratio for optimal performance. On the other hand it can be used to run the engine richer for racing stuff etc. no need for any piggy back chipping.

Lean mixtures improve the fuel economy but also cause sharp rises in the amount of nitrogen oxides (NOX). If the mixture becomes too lean, the engine may fail to ignite, causing misfire and a large increase in unburned hydrocarbon (HC) emissions. Too much Lean mixtures burn hotter and may cause rough idle, hard starting and stalling, and can even damage the catalytic converter, or burn valves in the engine. The risk of spark knock/engine knocking (detonation) is also increased when the engine is under load. The leaner the air?fuel mixture, the higher the combustion temperature is inside the cylinder. Too high a temperature will destroy an engine ? melting the pistons and valves.

Rich Mixture allows for greater peak engine power when using vapourized liquid fuels, due to the cooling effect of the evaporating fuel. This increases the intake oxygen density, allowing for more fuel to be combusted and more power developed. The engine performance can be lessened by increasing fuelling without increasing air flow into the engine.

Source: Air?€“fuel ratio meter - Wikipedia, the free encyclopedia

[VCheng]

AoA Guys
i come up with a new device "Intelligent Fuel Trimmer" i dont know if it exist or not but its my own idea very much own.

As we know most of the JDM vehicles dont perform well on our local low grade fuel which leads to poor mileage, knocking & stuff like that. As they are tuned on Japanese fuel & there is no way to adjust the fuel ratio or maps so most of them run rich like hell.

I have made a device "Intelligent Fuel Trimmer" which intelligently controls the amount of Fuel based onEngine Speed, Load & User settings. Thanks to the intelligent Complex Algorithm.
..............

That is incorrect. All modern OBD2 engines have oxygen sensors and other means to keep the ratio very close to stoichiometric after the engine has warmed up and the ECU is running in closed loop mode.

Boss @xulfiqar can explain this better I am sure.

[hameeds01]

That is incorrect. All modern OBD2 engines have oxygen sensors and other means to keep the ratio very close to stoichiometric after the engine has warmed up and the ECU is running in closed loop mode.

Boss @Xulfiqar can explain this better I am sure.

Yup i know O2 sensor is there for correction, most of the old vehicles have poor O2 sensor, They give more mileage due to rich burning.
JDM r tuned on Japanese fuel & there is no way to adjust them on Local fuel

O2 sensor jst do lil trimming mostly Injector width depends on Fuel Map table based on MAP/MAF & RPM +Temp reading

[hameeds01]

That is incorrect. All modern OBD2 engines have oxygen sensors and other means to keep the ratio very close to stoichiometric after the engine has warmed up and the ECU is running in closed loop mode.

Boss @Xulfiqar can explain this better I am sure.

If so then how "Unichip" piggy back computer Works?? without manipulating O2 signals or ECU Internal fuel/Ignition maps

Wiring diagram of Unichip jst for reference

https://www.pakwheels.com/forums/performance-modification-tune-up-preventive-maintenance/211365-unichip-installed-corolla-1-3l-gli-2012-huge-enhancement-performance

How MAP/MAF enhancers work without doing any thing to O2 or ECU internal Maps??
https://www.google.com.pk/search?q=map/maf+enhancer&source=lnms&tbm=isch&sa=X&ei=CLA_UpbODuam0wXO8oDwDg&ved=0CAcQ_AUoAQ&biw=1280&bih=661&dpr=1

So it means O2 sensor doesnt make that much solid contribution, its there in feedback loop & do lil trimming once the engine has reached its optimal temp

May be i am wrong . . .

[rustam54]

Yup i know O2 sensor is there for correction, most of the old vehicles have poor O2 sensor, They give more mileage due to rich burning.
JDM r tuned on Japanese fuel & there is no way to adjust them on Local fuel

O2 sensor jst do lil trimming mostly Injector width depends on Fuel Map table based on MAP/MAF & RPM +Temp reading

That is incorrect. All modern OBD2 engines have oxygen sensors and other means to keep the ratio very close to stoichiometric after the engine has warmed up and the ECU is running in closed loop mode.

Boss @Xulfiqar can explain this better I am sure.

If so then how "Unichip" piggy back computer Works?? without manipulating O2 signals or ECU Internal fuel/Ignition maps

Wiring diagram of Unichip jst for reference

https://www.pakwheels.com/forums/performance-modification-tune-up-preventive-maintenance/211365-unichip-installed-corolla-1-3l-gli-2012-huge-enhancement-performance

How MAP/MAF enhancers work without doing any thing to O2 or ECU internal Maps??
https://www.google.com.pk/search?q=map/maf+enhancer&source=lnms&tbm=isch&sa=X&ei=CLA_UpbODuam0wXO8oDwDg&ved=0CAcQ_AUoAQ&biw=1280&bih=661&dpr=1

So it means O2 sensor doesnt make that much solid contribution, its there in feedback loop & do lil trimming once the engine has reached its optimal temp

May be i am wrong . . .

@hameeds01

As always you come up with great ECU electronic ideas.

However I would like to ask a question. Why didnt you manipulated the MAF value to have an increase in fuel??

Vcheng is right. There are other ways to control fuel. The scheme you have adopted is done by E-manage.

Also Modern Vehicle Manufacturers are starting to equip cars with widebands. Especially the EURO4's roaming around these days. In these cars, the primary and most tight closed loop control is based on o2.

Even if we talk about older vehicle with oscillating o2 signal, giving info about lean/rich only and not how much lean and how much rich, even in that case, vehicle keeps adjusting short term fuel trims. When the short term fuel trims fail to correct the Stioch ratio, the long term fuel trims are adjusted. So in total, there is a long correction process before the engine decides it has failed to control the afr any more

Regarding Unichip, its application is based on many combinations depending on connections to a vehicle. In some cars, only connecting MAF, Crank and TPS can do the job. On others, one has to connect O2 as well. Or even better control can be implemented by connecting MAF and MAP. Response (no horsepower) can be increased by Pedal Sensor manipulation (Its differnt than TPS in DBW cars)

[hameeds01]

@hameeds01

As always you come up with great ECU electronic ideas.

However I would like to ask a question. Why didnt you manipulated the MAF value to have an increase in fuel??

Vcheng is right. There are other ways to control fuel. The scheme you have adopted is done by E-manage.

Also Modern Vehicle Manufacturers are starting to equip cars with widebands. Especially the EURO4's roaming around these days. In these cars, the primary and most tight closed loop control is based on o2.

Even if we talk about older vehicle with oscillating o2 signal, giving info about lean/rich only and not how much lean and how much rich, even in that case, vehicle keeps adjusting short term fuel trims. When the short term fuel trims fail to correct the Stioch ratio, the long term fuel trims are adjusted. So in total, there is a long correction process before the engine decides it has failed to control the afr any more

Regarding Unichip, its application is based on many combinations depending on connections to a vehicle. In some cars, only connecting MAF, Crank and TPS can do the job. On others, one has to connect O2 as well. Or even better control can be implemented by connecting MAF and MAP. Response (no horsepower) can be increased by Pedal Sensor manipulation (Its differnt than TPS in DBW cars)

@ rustam54
Dude playing with automotive electronics is my passion & love.

Fuel & Ignition map both depends on MAP/MAF signal, by manipulating MAP/MAF u can also disturb Ignition timing + as an engineer i m against wire cutting stuff. Yup there r other ways but it my own unique idea, i dont want to disturb OEM ECU functionality so far its running perfect in my Vitz.

This device intelligently manipulates or modifies the Injectors width depending on Engine Speed, Load & user setting.

Ok dude i have a Question if O2 sensor running in such a tight feedback loop is so effective then y most of the 3 cylinder JDM vehicles run rich?? Y 3 cylinder JDM vehicles r not capable enough to adjust themselves according to our low grade fuel specifications?? y 660cc JDM cryz 4 poor mileage? Injector width calculation mostly depends on Fuel maps & O2 is there jst for lil fine adjustments.

May be i am wrong "its just my idea"

[SER_GTR]

Nice Experimenttal Stuff

Since The Thing Is Connected To Injectors Directly....I Guess You Are Changing Pulse Width Of Injectors To Make Mixture LEAN RICH??

Am I Right...??

Since Messing With MAf Readouts Will Simply Bring Disaster Upon Driver As ECU Will Gone Possibly Into LIMP Mode Or Simply Start Playing Games Since The Reading Diofference With O2 Sensor Will Simply Bring Back The Maps Or Overwrite Your Changes

The Wideband Is A MUST Since Making These Rich/LEAN Should be monitored ..Narrow Band O2 Sensors (0-1v) Will Only Display Mixture Close To Perfect And Will Not Display Too Much LEAN And Rich Conditions.....!

So A Wideband Is Must....!

Most Of The Issues Based On These Cars Are With Timing And High Compression Running On LOW RON's........I Have Seen Almost Every New Car Knock SOmehow At Certain Revvs ...The Reason To Be Low RON ...Mixture Can Help A BIT Along With Timing Need To Calibrated As Per Fuel.....!!

Nice Thing B.t.w Specially For Those Who Need Quick Fix For Their Car In LIMITED Amout...But A WIDEBAND Is What I Say Should Be A MUST.....! Else Its Not A Game Simply To Move KNOB.....! Too Much LEAN Condition Can Cause You PAY A Big Price In No Time

[hameeds01]

@SER_GTR Sir yup i am modifying the injectors width based on Engine RPM, Load + User settings + i hav limited the lean or rich settings (-25 to +25% only)

I know sir almost all of the cars r equipped with wide band O2 sensor. & they r very expensive to replace

Sir should i continue my hobby Project device "Intelligent Fuel Trimmer" or its worthless ???? i can improve it by adding some more advance features + compact size + waterproof casing etc

Regards
hameed

[SER_GTR]

There's No Harm If You Monitor And Can Adjust It In Desired Range....Some People Need It To Do In Order To Enjoy Quick Response ..But The Point Is.....Curve.......!

Piggybacks Like AFC/Emanage Do It As Per Revv Range....You Can Increase Desired Amount Of Fuel As Per RPMS......!! Its Important As It Should Be Monitored Before Implying It....Diiferent Cars...Different Requirements......!

Increasing It ALL And Decreasing It ALL Will Simply Make It Unstable And Troubleful.....!DOing It Via Injectors Is The Best Thing W.o Messing With Other LOAD Sensors Readout.....

[hameeds01]

@SER_GTR

Yup i understand ur point "Curve" but for economical setting its not a bad idea, this device jst modifies the original Injector width or more precisely u can say it adjusts the gain or provide attenuation.

Sir i come up with another after market device, hav a look at it

Cobra Fi2000 PowrPro- Fuel-Injection Tuner- CW Product Reviews

http://www.cobrausa.com/fuel.php

the product is there in Market

you can say good-bye to old-school EFI mapping mania and O2 sensor hassles.

[rustam54]

@ rustam54
Dude playing with automotive electronics is my passion & love.

Fuel & Ignition map both depends on MAP/MAF signal, by manipulating MAP/MAF u can also disturb Ignition timing + as an engineer i m against wire cutting stuff. Yup there r other ways but it my own unique idea, i dont want to disturb OEM ECU functionality so far its running perfect in my Vitz.

This device intelligently manipulates or modifies the Injectors width depending on Engine Speed, Load & user setting.

Ok dude i have a Question if O2 sensor running in such a tight feedback loop is so effective then y most of the 3 cylinder JDM vehicles run rich?? Y 3 cylinder JDM vehicles r not capable enough to adjust themselves according to our low grade fuel specifications?? y 660cc JDM cryz 4 poor mileage? Injector width calculation mostly depends on Fuel maps & O2 is there jst for lil fine adjustments.

May be i am wrong "its just my idea"

The reason these JDM cars are not able to perform at their best (or vendor claimed mileage) is because of poor fuel. The fuel is a lower RON value and causes engines to knock. To save the engine, the timing is retarded (compared to base map) and thus engine is prevented from running at its optimum. There is difference between running SAFE and Running Optimum

Your engine is in a constant effort to run safe as it tries each time to run optimum on this fuel. It determines (from map/tables) that for any MAF and RPM value, X should be the fuel, and Y should be timing. Afterwards it goes to trims for each. Your O2 readout says fuel is okay, but your Knock sensor tells you have to retard timing.

Hence the overall efficiency and power output for a given load are disturbed. This further implies that you have to push farther on the throttle (thus creating more load) to attain that same level of drive as compared to using fuel with higher RON.

Thus more fuel consumed.

And @SER_GTR is right, to sell this product, you have to have a wideband, and a dyno. so you can fine tune based on statistics and not just hunches. Too lean may increase engine temperature to undesirable levels

[hameeds01]

The reason these JDM cars are not able to perform at their best (or vendor claimed mileage) is because of poor fuel. The fuel is a lower RON value and causes engines to knock. To save the engine, the timing is retarded (compared to base map) and thus engine is prevented from running at its optimum. There is difference between running SAFE and Running Optimum

Your engine is in a constant effort to run safe as it tries each time to run optimum on this fuel

And @SER_GTR is right, to sell this product, you have to have a wideband, and a dyno. so you can fine tune based on statistics and not just hunches. Too lean may increase engine temperature to undesirable levels

you can say good-bye to old-school EFI mapping mania and O2 sensor hassles

CobraUSA | Fuel Management

[fahdlovespak]

Can it be used on reborn civic 2010

[hameeds01]

Can it be used on reborn civic 2010

yeah sure it can be installed in any EFI Vehicle (1 to 4 cylinder), The first prototype is in testing phase

Such a device do exist in market

Cobra Fi2000 PowrPro- Fuel-Injection Tuner- CW Product Reviews

but its for Motorbikes + too expensive + its aim is to increase Performance whereas my focus is on economical settings

[SER_GTR]

Keep Working ..... And Have A Test On Any Needy Vehicle

It Will Surely Aid Many People....!!

[VCheng]

If so then how "Unichip" piggy back computer Works?? without manipulating O2 signals or ECU Internal fuel/Ignition maps

...............

https://www.pakwheels.com/forums/performance-modification-tune-up-preventive-maintenance/211365-unichip-installed-corolla-1-3l-gli-2012-huge-enhancement-performance

How MAP/MAF enhancers work without doing any thing to O2 or ECU internal Maps??
https://www.google.com.pk/search?q=map/maf+enhancer&source=lnms&tbm=isch&sa=X&ei=CLA_UpbODuam0wXO8oDwDg&ved=0CAcQ_AUoAQ&biw=1280&bih=661&dpr=1

So it means O2 sensor doesnt make that much solid contribution, its there in feedback loop & do lil trimming once the engine has reached its optimal temp

May be i am wrong . . .

Aftermarket chips like the Unichip and other claim to work by modifying the fuel trims and timing adjustments to make more power, often at the cost of emissions and fuel economy. The MAF/O2 and other sensors/ECU system as used by OBD2 these days is pretty close to a best possible compromise for emissions, fuel economy and power, and any empirical fiddling will likely deteriorate overall performance, not improve it, for use on the road for which the car was designed.

If you want to make the most power from an engine, and do not care for emissions and fuel economy, for example on a race track, then such chips give the ability to dump more fuel and optimize timing for overly rich AFRs to make more power, but that is a totally different scenario.

[AmeerUsman]

Well this is something new for me but nice work done. Keep it up.

[hameeds01]

@ SER_GTR, VCheng & rustam54

Thank you sir for ur precious inputs, currently there is no way to adjust the air fuel mixture ratio manually, stupid mechanics do Tappet/inlet valves clearance adjustment etc to make the Engine economical.

After installing this device "Intelligent Fuel Trimmer" a qualified person can adjust the Optimum AFR ratio using AFR meter for economical mode.

This device does nothing much with Fuel Curves it just attenuate or provide some extra gain so the actual performance of the Engine remains unchangd. It has lots of safety/fool proof checks.

i m working as a senior Engr in NUST on Robotics Control systems & its my hobby project as i love to play with automotive electronics.

Sir what u say is there any worth of making such device or i m jst wasting my time/energy??

Regards
hameed

[VCheng]

@ SER_GTR, VCheng & rustam54

Thank you sir for ur precious inputs, currently there is no way to adjust the air fuel mixture ratio manually, stupid mechanics do Tappet/inlet valves clearance adjustment etc to make the Engine economical.

After installing this device "Intelligent Fuel Trimmer" a qualified person can adjust the Optimum AFR ratio using AFR meter for economical mode.

This device does nothing much with Fuel Curves it just attenuate or provide some extra gain so the actual performance of the Engine remains unchangd. It has lots of safety/fool proof checks.

i m working as a senior Engr in NUST on Robotics Control systems & its my hobby project as i love to play with automotive electronics.

Sir what u say is there any worth of making such device or i m jst wasting my time/energy??

Regards
hameed

I appreciate your efforts and do wish you the best of luck.

Let us start by asking the purpose of this device. What problem does it propose to resolve, and how do you plan to achieving the solution?

We can talk about the performance and finally the market for such a device later.

[wasay_ahmed]

Nice Jb bro