Smooth Acceleration circuit

[Milan78nis]

Hi.
My name is Milan. My English is not too good but i hope that you will understand me and provide help.
I want to correct accelerator pedal signal. signal voltage range is from 0.98V depressed to 4.5V full

pressed pedal.
input voltage is 5v. when i hard step on the pedal, voltage jump is very instant and car hesitates.

is it possible to make some simple electronics device to correct signal and slow down voltage jump or

reduce rising to some point like 1.5V and than allow exponentially rising of voltage like without a

device. i was attached picture of what i want to accomplish.
Any idea? Using transistor or FET in circuit or something else? Any example? Thanks in advance!

 

[Gryd3]

@Milan78nis , how are you with electronics?

Please note that vehicle modification is a prohibited topic... mind you, this could be for a go-kart or kid's toy so I will give you some tips.

Google RC delay circuits.
A simple resistor and capacitor will create a 'delay'. This delay will slow the rate at which the voltage increases, and also smooth out any sudden changes.

 

[Milan78nis]

Thanks for reply but i already tried that and that is not good solution because that delay is for full range and also delay cause override. If i set rc filter with values that delete jerking from low rpm that values slows down acceleration very much. i just need smooth voltage for very short time just little above rpm and than no influence at all. just like on left picture.

 

[Laplace]

Sounds like you could put the capacitor on a sticky switch. At some threshold on the RC charge curve the capacitor will be switched out of the circuit and quickly discharged. When the throttle has been returned to the idle position the capacitor will be connected again to delay the next acceleration from idle. The capacitor charge & discharge switches could be a relay or power MOSFET.

 

[Milan78nis]

Thanks Laplace for reply. Can you post some simple circuit for what you suggest?

 

[Milan78nis]

is it possible to correct signal voltage depending of how fast is that signal changing?

 

[KrisBlueNZ]

Someone should have caught this thread earlier.

Automotive modifications are a prohibited topic here (and on many other forums) because of the obvious dangers.

I'm closing this thread now.