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That is what Cruts advised, but can I just say to connect a separate 47R resistor to each MOSFET gate. 10K Ohms is way too high, especially for a single resistor.Thank you for advise!
You mean to change the circuit like this:
Wow- thanks for your kind words.Hi Spec!
Like always wise and perfect advise thanks!
I think that I realized your recommendations right:
I cannot comment on the design as others here know FAR more than me, but I do have a question for you. If this is just for cleaning and testing injectors, why not just use a battery and momentary switch? When I have to test an injector I just hook it up to a fixture that I put WD40 into, add some pressure, and put the juice to the injector and look at the spray pattern. Not criticizing just wondering.Hi all,
I've decided to build a device for testing and cleaning a car fuel injectors (petrol).
I've made a simple circuit to manage a four injectors.
My question is - Is this circuit will work properly?
Hi TS,I cannot comment on the design as others here know FAR more than me, but I do have a question for you. If this is just for cleaning and testing injectors, why not just use a battery and momentary switch? When I have to test an injector I just hook it up to a fixture that I put WD40 into, add some pressure, and put the juice to the injector and look at the spray pattern. Not criticizing just wondering.
Thank you
Tom
Thank you.Hi TS,
The spray pattern of an injector is vital, as you imply. Another important characteristic is cut off- does the injector seal completely when de-energized.
But the dynamics of an injector also need to be tested so you need to exercise the injectors at high speed.
Also, if you are cleaning an injector with a suitable solvent, the injector needs to be exercised for quite a while and it would be rather tiresome to have to keep switching the injector on and off with a switch.
spec
Hmm, interesting observation.I still can't understand why people don't use one of the many injector driver chips that are available along with a 555 to do this. Over time there have been many questions asked about doing this same thing. But when using high value mosfets in a "test" fixture, is that really going to tell you what will happen in a real world environment? Where using a real injector driver should be closer to real world, and in the end faster and easier.
Nice piece of information SBYes the chips are available. Take your pick. https://www.google.com/search?q=fuel+injector+driver&ie=utf-8&oe=utf-8#q=fuel+injector+driver+ic