Hello everyone. Sorry if this is the wrong topic to post in, but hopefully some automotive people could help me on some information.
I have done an extensive amount of research on the topic of automotive fuel pumps. I have an application that is limited to very low current ~1500mAh in which a fuel pump type system should be used. We are exploring various options at the moment, but I need some clarification.
I have read on several sites that when a standard fuel pump turns on by a person putting an ignition key into the car, the pump runs for say 5 seconds then "shuts off". This is essentially the pump building pressure in the system. However in a return type pump system, I would assume the pump runs continuously, thus drawing a massive current.
In a return less type system, the fuel will not be recirculated, instead the pump should accumulate the fuel and pressure in a fuel line via a check valve. So my understanding is that once the pressure is built up, the pump could then be shut off entirely thus drawing little or no current. Is this the case? We essentially want to build a system that draws as little current as possible by only running a massive fuel pump when we need the pressure to the system to be maintained. A standard fuel pump can draw say 10 amps. I assume this means when the pump is on and not in the 'regulating' state of maintaining the pressure in a return less system. Is this assumption correct?
We can buy or build a pressure regulator with a controller. This is to be integrated into a fuel injection system. However, in order to save current, since the pressure should only decrease when a fuel injector is opened, the pump should run during these times to 'fill the pressure back up'. Do you think this is possible by pwming or turning the pump on and off dynamically?
Any help is appreciated. Thanks.
I have done an extensive amount of research on the topic of automotive fuel pumps. I have an application that is limited to very low current ~1500mAh in which a fuel pump type system should be used. We are exploring various options at the moment, but I need some clarification.
I have read on several sites that when a standard fuel pump turns on by a person putting an ignition key into the car, the pump runs for say 5 seconds then "shuts off". This is essentially the pump building pressure in the system. However in a return type pump system, I would assume the pump runs continuously, thus drawing a massive current.
In a return less type system, the fuel will not be recirculated, instead the pump should accumulate the fuel and pressure in a fuel line via a check valve. So my understanding is that once the pressure is built up, the pump could then be shut off entirely thus drawing little or no current. Is this the case? We essentially want to build a system that draws as little current as possible by only running a massive fuel pump when we need the pressure to the system to be maintained. A standard fuel pump can draw say 10 amps. I assume this means when the pump is on and not in the 'regulating' state of maintaining the pressure in a return less system. Is this assumption correct?
We can buy or build a pressure regulator with a controller. This is to be integrated into a fuel injection system. However, in order to save current, since the pressure should only decrease when a fuel injector is opened, the pump should run during these times to 'fill the pressure back up'. Do you think this is possible by pwming or turning the pump on and off dynamically?
Any help is appreciated. Thanks.