Why haven't solenoids replaced camshafts for valve timing?

Basically the title. Would the transition from mechanical to electrical timing not simplify engine design and lessen problems? Is there a major flaw that I'm missing or is it just the saying of "If it ain't broke, don't fix it"?

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πŸ“°︎ r/cars
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πŸ“…︎ Aug 30 2021
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Did somebody say something about being a truck driver? Driving this far to change a solenoid valve for a restaurant.
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πŸ“°︎ r/HVAC
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πŸ‘€︎ u/Jackbauer1126
πŸ“…︎ Sep 08 2021
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So the engine itself is ready the solenoid valve for the fuel tank has arrived and the load cell is also ready to use the only thing remain is the fuel once that is here we'll test this bad boy up (after making the fuel tank) reddit.com/gallery/q7yhyk
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πŸ“°︎ r/pakistan
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πŸ‘€︎ u/what_the_fuck_1
πŸ“…︎ Oct 14 2021
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CO2 cartridge solenoid valve ???

I want release the pressure of a CO2 (e.g. 16g) cartridge as fast as possible. Can this be done with a solenoid valve? Most solenoids that I have seen are only for 10bar and a CO2 cartridge has 60bar (I think). Has someone made experiences with such high pressure and solenoids or do you have a different idea how I can electrically release high pressure?

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πŸ“°︎ r/diyelectronics
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πŸ‘€︎ u/JaCoSol
πŸ“…︎ Oct 06 2021
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Failed valve solenoid removal... reddit.com/gallery/pwom0q
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πŸ“°︎ r/MechanicAdvice
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πŸ‘€︎ u/mikomatto
πŸ“…︎ Sep 27 2021
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It's time to plumb the the shower. Here are the items needed for the task. I went with a 1.5" electric solenoid valve instead of ball valve due to the lead times, shortages and priceπŸ˜ƒπŸ‘ŒπŸΎ reddit.com/gallery/qgetb9
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πŸ“°︎ r/VanLife
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πŸ“…︎ Oct 26 2021
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Solenoids on valves failing often (greenhouse)

24VDC, fail open valves. I repeat: normally open valves. I replace the solenoids way too often. Some have lasted only a few weeks.

These valves spend most of their time unpowered. When the irrigation system is in use, the pump activates and the solenoids turn ON, closing the valve until the system is ready to spray. This only lasts a few moments at a time.

Then the solenoids turn OFF to open the valves for spraying. At the end of the run the solenoids briefly turn on to avoid overwatering, then the pump shuts down and the solenoids go back to unpowered, letting water drain from the system out the nozzles.

So what would be eating these things? A snubber circuit would protect the relays, not the solenoids, right?

Edit: to be clear, the valves are A-OK. It is the solenoid actuators that are dying on me.

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πŸ‘€︎ u/Windbag1980
πŸ“…︎ Sep 27 2021
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Solenoid valve testing

Hey all, washing machine stopped filling with water the other day and I'm assuming it's due to a faulty solenoid valve.

Took the part out and checked it with a multimeter. Neither of the coils show any resistance or continuity.

Is it normal that both coils go out at the same time or did I somehow test it wrong?

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πŸ“°︎ r/DIY
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πŸ‘€︎ u/Beljo21
πŸ“…︎ Aug 16 2021
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Trying to find a replacement for this solenoid valve but I need it with a manual override. I can’t seem to find a complete one. Is it a separate purchase from the valve itself?
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πŸ“°︎ r/engineering
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πŸ‘€︎ u/vestigial_reasons
πŸ“…︎ Sep 14 2021
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Need help car runs rough and loss power and exhaust sounds choppy on high rpm. I replaced the vanos solenoids and non return valves and spark plugs but car still runs rough
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πŸ“°︎ r/BmwTech
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πŸ“…︎ Aug 28 2021
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Wanting to retrofit 1/2" drip line to already installed solenoid valves. What's the best way to do that?

Trying to help out my mom with a project of turning her old sprinkler system into a drip system since they recently removed all the grass in the front yard. Currently, they have all of these solenoid valves uncovered in the front and hooked up to an irrigation controller. I live in Idaho while my parents live in California so my sprinkler system is rigged up a bit different than this.

At my house, I set up my drip system to a hose faucet with a backflow preventer > pressure regulator > timer > 1/2" tube adapter and it was pretty simple.

What's the best way to do that with these solenoid valves? Looking at these valves, I'm not sure of the best way to take them apart to hook up those additions. I also found a pre-built system like this but not entirely sure how to remove the current system to install these - https://store.ewingirrigation.com/12007630-pgv-1-inch-drip-control-zone-kit-with-25-psi-regulator

Any help or suggestions are appreciated.

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πŸ“°︎ r/NoLawns
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πŸ‘€︎ u/iflanzy
πŸ“…︎ Aug 23 2021
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Can someone with a 2012 TSX or other second gen look at their VTC solenoid valve for me?

https://imgur.com/a/TVouCBO

The head of the bolt sticks all the way out like it isn't screwed all the way in. Is it suppose to look like that?

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πŸ“°︎ r/AcuraTSX
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πŸ‘€︎ u/crazy_eric
πŸ“…︎ Oct 03 2021
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A transistor circuit to activate a 12V solenoid valve

Hi guys,

I'm in need of help concerning this circuit of transistor I made.

The circuit is made to convert a Β΅C command (more precisely a digital output) that varies from of 0V - 5V (whether a PWM or digital high/low signal) to 0V - 12V (which comes from a power supply).

First, the Β΅C signal (identified as "In" in the schematic) drives the first Q1 transistor and through the change in current passing in Q1, that same current drives the base of Q2 therefore applying a voltage that ranges from 0-12V.

The output voltage is then applied to a solenoid valve of 12V (in parallel of the Q2 transistor).

Now the thing is, every time the solenoid is connected in parallel to the Q2 transistor, the voltage drops drastically and the solenoid is not activated.

That maybe explained by the R2 resistor being in series with the solenoid (since the solenoid is connected in parallel to Q2). It makes RL circuit in series which result in charging the inductor and thus reduce the output voltage of the circuit.

But when I remove the connection the voltage goes back to 12V.

I understand that the inductor component (solenoid) is resisting the change in current but I don't understand why the voltage drops drastically?

I added a fly back diode to protect the transistor but still the issue remains.

Can you guys help me out on this one? I'm open to all inputs!

Many thanks to all!

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πŸ‘€︎ u/Weightless-Rock
πŸ“…︎ Sep 16 2021
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Operator-β€œthe solenoid valve should be cycling but it’s stuck on.” Me - β€œI wonder why”
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πŸ‘€︎ u/Logical_Ad2249
πŸ“…︎ Aug 31 2021
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Domestic water 5HP 480v 3 ph booster skid, 510 gallon SS break Tank, Cla-Val solenoid fill valve, Softener loop/bypass and pressure tank install. reddit.com/gallery/pu06ry
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πŸ“°︎ r/Plumbing
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πŸ“…︎ Sep 23 2021
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I was having trouble with the water flow in my gaggia, I descaled and the problem seems to have continued. I took a part the solenoid valve to see if scale had built up in there but it looked completely clean to me. Any ideas as to what could be happening? v.redd.it/qb5xf556dkk71
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πŸ“°︎ r/gaggiaclassic
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πŸ‘€︎ u/habohead
πŸ“…︎ Aug 30 2021
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Leave vacuum line to stuck closed purge valve solenoid disconnected?

My Solenoid is stuck closed on my 2008 type S and cleaning it had no results. My question is should I disconnect my vacuum line so that my engine has the proper airflow? Or is that worse than leaving it connected to a closed valve? My assumption would be to disconnect it but I’m not confident and it’ll be a few days before I get my new part in. Thanks!

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πŸ“°︎ r/Acura
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πŸ“…︎ Sep 07 2021
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Has anyone here ever replaced VTC Oil Control Solenoid valve on a 2012 or other 2nd gen TSX?

CEL came on and went away by itself. Then it idled rough once. Took it to Acura dealership to have them check and they said the VTC Oil Control Solenoid valve needs to be replaced.

  1. I'm trying to figure out where this part is and what it looks like.

  2. Is it easy for a layperson to reach and replace? If it's relatively difficult to access, then I will just have the dealership do it.

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πŸ“°︎ r/Acura
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πŸ‘€︎ u/crazy_eric
πŸ“…︎ Sep 19 2021
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