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#1
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
I tried to use a 3½ amp output capacity buck convertor ( with auto
voltage i.e. self adjusts PWM timing ratios if input voltage fluctuates e.g. when starter motor cranks engine & battery voltage drops to 9½v ) & 2 700mAh lithium batteries ( to feed 4v to * when b-c could not, during engine cranking ) to replace my honda F20a 's *' resistors. I fitted 2 1¼" Ø inductor rings & 15000µF to damp b-c's +ve 12-14v input. This engine could start & run, but [i] the usual open loop ( when ECU activates * til O2 sensor produces a voltage of 0.65v ) did not appear [ii] when I step on throttle to accelerate car, ECU could not activate injectors long enough to inject enough fuel ( this inadequacy was visible on my digital voltmeter which receives & reports O2 sensor's output ), so acceleration was less than usual. This ECU ( made by NEC in 1990 ) [i] activates * by connecting *' -ve ground, [ii] seems cannot function as usual if I draw +ve 12-14 v from cigarette lighter socket, I'll try to draw +ve 12-14v from ECU & see if ECU can work as usual. |
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#2
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
If some1 replied during 17th -31st Oct'08, pls repost ; my
ISP 's news server was down & now shows no post in this period. |
#3
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
"TE Chea" > wrote in :
> If some1 replied during 17th -31st Oct'08, pls repost ; my > ISP 's news server was down & now shows no post in this > period. > > go check google to see what you missed. KB -- THUNDERSNAKE #9 Protect your rights or "Lose" them The 2nd Admendment guarantees the others |
#4
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
| go check google to see what you missed. KB
I'm amazed to see many of my posts to newsgroups listed by Google, but cannot find any reply to this thread. Does Google run a newsgroup service like some ISP`s do ? |
#5
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Use a buck convertor to replace fuel *injectors' resistors, hasany1 here succeeded ?
On 2008-11-18, TE Chea > wrote:
>| go check google to see what you missed. KB > > I'm amazed to see many of my posts to newsgroups listed by > Google, but cannot find any reply to this thread. Does Google > run a newsgroup service like some ISP`s do ? no. their newsgroup service is unique! http://groups.google.com most users who post through it use it to send spam, so many people have it filtered. however it's free, easily accessable, and searchable. BTW: looks like you got no replies. what are you hoping to gain by this substitution? |
#6
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
| no. their newsgroup service is unique! http://groups.google.com
| most users who post through it use it to send spam, so many people | have it filtered. however it's free, easily accessable, and | searchable. | BTW: looks like you got no replies. Thanks for reply. | what are you hoping to gain by this substitution? I want to see any reply to this thread ( I thought this wish was obvious ). |
#7
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Use a buck convertor to replace fuel *injectors' resistors, hasany1 here succeeded ?
TE Chea wrote: [i] > I tried to use a 3 amp output capacity buck convertor ( with auto > voltage i.e. self adjusts PWM timing ratios if input voltage > fluctuates e.g. when starter motor cranks engine & battery voltage > drops to 9�v ) & 2 700mAh lithium batteries ( to feed 4v to * > when b-c could not, during engine cranking ) to replace my honda > F20a 's *' resistors. I fitted 2 1�" � inductor rings & 15000�F to > damp b-c's +ve 12-14v input. > This engine could start & run, but [i] the usual open loop ( when > ECU activates * til O2 sensor produces a voltage of 0.65v ) did > not appear [ii] when I step on throttle to accelerate car, ECU > could not activate injectors long enough to inject enough fuel ( > this inadequacy was visible on my digital voltmeter which receives > & reports O2 sensor's output ), so acceleration was less than usual. > This ECU ( made by NEC in 1990 ) activates * by connecting *' > -ve ground, [ii] seems cannot function as usual if I draw +ve 12-14 > v from cigarette lighter socket, I'll try to draw +ve 12-14v from > ECU & see if ECU can work as usual. Have you tried the websites of Motorola, On-Semi, ST Microelectronics, National Semiconductor, and other companies that produce chips for automotive use? Their applications notes have a great deal of practical information about driving solenoid valves. |
#8
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Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?
> I tried to use a 3 amp
Correction : 3½ amp, 42w maximum.. | Have you tried the websites of Motorola, On-Semi, ST Microelectronics, | National Semiconductor, and other companies that produce chips for | automotive use? No | Their applications notes have a great deal of | practical information about driving solenoid valves I'll try to draw 12v from ECU 1st ; my present ISP has server congestion outside 1-7am. |
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