techenthusiast
- Apr 7, 2017
- 2
- Joined
- Apr 7, 2017
- Messages
- 2
This is my first post here, I'll try to make my question as easy and simple as possible
So I made a crude drawing uploaded of my task and here's a crude explanation first followed by background and detail if you're interested/if it helps
Basically one end of the circuit sees a potentiometer voltage. I need to switch it off at a certain point and substitute it with a different voltage while the other end of the circuit still sees potentiometer voltage. This needs to happen constantly over and over again depending on how I press the throttle pedal
Throttle position sensor sends a signal to ECU, potentiometer type, sending .5-4.5 volts from closed pedal to wide open throttle
I have a fuel controller tapped into the circuit, my fuel controller reads throttle voltage but doesn't intercept and change it - it just uses it as reference when I make changes in fueling
I want to wire in a grounded pressure switch that activates at a certain pressure. The ground will run a relay that pulls battery voltage, with a voltage regulator to drop it to 4.5 volts. That needs to be sent ONLY to the ECU side of the circuit while the fuel controller side still reads normal potentiometer voltage at the same time
So I basically want the ECU to see wide open throttle earlier than the circuit is designed to, while the fuel controller part of the circuit still and always will see a normally operating throttle position
I want the ECU to see only the wide open throttle (4.5v) when the switch is activated, the fuel controller part of the circuit to still see normal potentiometer voltage, and I need it to be able to happen back and forth instantly depending on how much gas I give it
(ecu must jump into normal operating mode, jump into WOT mode, back to normal operating mode, and so forth)
The only experience I have with automotive circuit modification like this is adding diodes for other purposes. But I can't see how diodes will make this work. Is there a different type of hardware like a diode to do something like this?
Thanks
So I made a crude drawing uploaded of my task and here's a crude explanation first followed by background and detail if you're interested/if it helps
Basically one end of the circuit sees a potentiometer voltage. I need to switch it off at a certain point and substitute it with a different voltage while the other end of the circuit still sees potentiometer voltage. This needs to happen constantly over and over again depending on how I press the throttle pedal
Throttle position sensor sends a signal to ECU, potentiometer type, sending .5-4.5 volts from closed pedal to wide open throttle
I have a fuel controller tapped into the circuit, my fuel controller reads throttle voltage but doesn't intercept and change it - it just uses it as reference when I make changes in fueling
I want to wire in a grounded pressure switch that activates at a certain pressure. The ground will run a relay that pulls battery voltage, with a voltage regulator to drop it to 4.5 volts. That needs to be sent ONLY to the ECU side of the circuit while the fuel controller side still reads normal potentiometer voltage at the same time
So I basically want the ECU to see wide open throttle earlier than the circuit is designed to, while the fuel controller part of the circuit still and always will see a normally operating throttle position
I want the ECU to see only the wide open throttle (4.5v) when the switch is activated, the fuel controller part of the circuit to still see normal potentiometer voltage, and I need it to be able to happen back and forth instantly depending on how much gas I give it
(ecu must jump into normal operating mode, jump into WOT mode, back to normal operating mode, and so forth)
The only experience I have with automotive circuit modification like this is adding diodes for other purposes. But I can't see how diodes will make this work. Is there a different type of hardware like a diode to do something like this?
Thanks