Just a thought, but what about putting a 'dial what you want' type of pressure regulator on the line from the pump and thus lowering the flow rate on each injector pulse to lean the one you have?
You might need one with a 'return line to the tank' shunt depending on the type of pump you have.
Or maybe one with a relay trigger to pulse the pump off once the right low pressure is reached?
As I say, just a thought or two, all the small engines I play with have carbs...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
rahul nair wrote:
> Hi
>
> I am working on fuel injection (port injection) of a four stroke > engine .
>
> The problem is that we are not able to find injectors and fuel pumps
> that are suitable for this engine.
> The specifications of the engine are:
> 109.2cc,Single-cylinder, air-cooled, four-stroke,petrol
> 8.1bhp at 7250rpm,
> 0.83kgm at 5500rpm
>
> On the internet we found a formula for calculating the flow rate of
> the ideal injector ie (HORSE POWER x BSFC)/ (No. OF INJECTORS x 0.8).
> They say to take BSFC approximately 0.5 for naturally aspirated
> engines and the "0.8" is for the injector duty cycle. According to the
> above formula the flow rate for the ideal injector is 5.0625 lbs/hour.
> Is this formula correct?
> This flow rate is very low and we have not been able to find such low > flow injectors.
> We are presently using a BOSCH EV10 injector which is too big and
> floods the engine.The fuel pump is also from BOSCH, but it draws too > much current.
> Does anyone know where I can find such small injectors and a fuel pump > for it?
>
>
> Thanking You
> Rahul Nair