[Diy_efi] Measuring Pulse Width/Duty Cycle of an Injector?

[Marcello A. Belloli]

No worries t,
     I will check it out.  I am so glad to her something positive.  I
would love to look at the code.  I'm sure I could take anything for
the 16f and use it will a little modification on the 18f452.  Thanks,
 Marcello



> Marcello
> Sorry for the late post on this.
> Someone inquired as to the accuracy of the posted pulse width meters.
> The one I posted "PWMETER" that used a 16f876 counts 1 us clock pulses,
> so I think it will provide the accuracy you need and then some.
>
>
> t
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> On Behalf Of Marcello A. Belloli
> Sent: Tuesday, May 24, 2005 7:11 AM
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] Measuring Pulse Width/Duty Cycle of an Injector?
>
> 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.
>
> Marcello
>
>
>
>> --- 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
>> injector.
>>
>> 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 |
>>
>>
>>
>> __________________________________
>> Do you Yahoo!?
>> Yahoo! Small Business - Try our new Resources site
>> http://smallbusiness.yahoo.com/resources/
>> _______________________________________________
>> Diy_efi mailing list
>> Diy_efi at diy-efi.org
>> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>
>
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>