[Diy_efi] Measuring Pulse Width/Duty Cycle of an Injector?
Marcello A. Belloli
mbelloli at speedymotorsports.com
Tue May 24 06:10:36 CDT 2005
Honda Acura OBD 0 cars used a system of Peak and pulse width modulate. I
am not sure if this was or is a bosch system. I didn't know I was going
to have to deal with these until I was halfway done with everything else.
All I know is it sucks. The later type used in OBD I cars just reduces
the voltage. And doesn't make my head hurt.
> --- Steve Ravet <Steve.Ravet at arm.com> wrote:
>> I haven't see all driver circuits out there but I
>> think most of them don't duty cycle the injector,
>> they just reduce the voltage applied to the
> The only designs I have seen that do this are Bosch
> systems. The advantage is that the output transistor
> is always driven at 100%, when driven (duty cycle is a
> straight square wave), so heat is greatly reduced over
> a regular P&H setup. The drawback is broadband EMF. :(
> | 82 Honda CX500 Turbo (Cassandra) 90 Kwak Zephyr 550 (Daphne) |
> | "It was like an emergency ward after a great catastrophe; it |
> | didn't matter what race or class the victims belonged to. |
> | They were all given the same miracle drug, which was coffee. |
> | The catastrophe in this case, of course, was that the sun |
> | had come up again." -Kurt Vonnegut |
> | M/C Fuel Inj. Hndbk. @ Amazon.com - http://tinyurl.com/6o3ze |
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