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fuel injection in small motorcycles

 
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rahul nair

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Since: Sep 12, 2003
Posts: 1



(Msg. 1) Posted: Fri Sep 12, 2003 7:44 am
Post subject: fuel injection in small motorcycles
Archived from groups: rec>motorcycles>tech (more info?)

Hi

I am working on fuel injection (port injection) of a four stroke
motorcycle .

The specifications of the motorcycle are:
109.2cc,Single-cylinder, air-cooled, four-stroke,petrol
8.1bhp at 7250rpm,
0.83kgm at 5500rpm

The problem is that we are not able to find injectors and fuel pumps
that are suitable for this engine.

We need injectors with a flow rate of 78 g/min. 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

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Mark Olson

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Since: Jul 18, 2003
Posts: 1656



(Msg. 2) Posted: Fri Sep 12, 2003 10:28 am
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

rahul nair wrote:

 > I am working on fuel injection (port injection) of a four stroke
 > motorcycle .
 >
 > The specifications of the motorcycle are:
 > 109.2cc,Single-cylinder, air-cooled, four-stroke,petrol
 > 8.1bhp at 7250rpm,
 > 0.83kgm at 5500rpm
 >
 > The problem is that we are not able to find injectors and fuel pumps
 > that are suitable for this engine.
 >
 > We need injectors with a flow rate of 78 g/min. 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?

If any manufacturer builds a fuel injected 400cc four cylinder, you
might try using an injector and pump from that engine. As far as I
know the smallest bike engines with fuel injection are the 600cc
supersports (Honda CBR600F4i, etc.). Perhaps one of the injectors
from one of those 125cc cylinders might be able to meter the tiny
amounts of fuel you need at idle, but it would be a stretch.

--
Mark '01 SV650S '81 CM400T '99 EX250-F13
DoD #959635 RFB #2 (my email domain is net)

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