All About Valves

Archive for the ‘Valves’ Category

How do the numbers of cylinders, valves, and cam shafts affect an engine? Also, what effect does the volume have?

The more cylinders, the better the smoothness, torque, less vibration, but worse mpg and cost.
More valves add more high-rev power to an engine due to the more efficient mixture filling.
No. of camshafts depends on engine layout (in-line, V, flat) and on no. of Valves. More camshafts doesn’t necessarily mean better valve control, but it makes the engine more expensive.
The volume (ie, engine displacement) is more important than sheer power. The greater the displacement, the better the power progression, the torque and worse mpg. Current trend is to squeeze ever more power from the low-displacement engines.

I’ve done a lot of electrical work around my house, but I’ve never done any plumbing before. The guy at Home Depot told me that I need to heat the fitting, but not the pipe itself. He also said that Valves (the new ballcock type) are easily destroyed by overheating. How do I know when the pipe and fitting is ready to accept the solder? How do I avoid damaging the valve? How do I know how strong to turn up the flame on the propane torch?

first, get all your tools together. torch, solder, flux and emery cloth or sandpaper. clean the end of the pipe, get it bright and shiny. then clean the inside of the fitting, getting it bright and shiny. now don’t touch the end of the pipe or the inside of the fitting with your fingers. there is oil on your fingers which will keep the solder from sticking. after getting everything shiny clean cover the end of the pipe and the inside of the fitting with flux, or soldering paste. next insert the pipe into the fitting and give it a quarter turn to distribute the flux. next, heat the fitting with the torch, using the tip of the inner blue flame. heat the fitting, not the pipe. when the fitting is hot enough take the torch away from the fitting and touch the solder to the joint. if its hot enough the solder will flow into the joint through capillary action. all you need to next is wipe the joint with a dry cloth and the job is done.

Also, what is the most Valves a cylinder can have?

average is 8, 1 intake and 1 exhaust per cylinder, there are 16 valve, 2 intake and 2 exhaust per cylinder…

I’m doing a project on physics for a cross disciplinary science project. The problem is I’ve never actually taken physics before. Does anyone know how a change of pressure will make the two ball check Valves at the bottom of an oil shaft open and close. Is it because of the moving fluid, and if so how does moving fluid create pressure? Also, how does the oil actually get from the bottom to the top? Is it a change in atmospheric pressure, and if so how do you get rid of the air in the shaft?

Thanks

There is no air used in a pumpjack or bottle jack. It is a pure hydraulic system. The fluid is used by taking two different size pistons and varying the size between them to come up with the amount of pressure you can reasonably apply on one cylinder to make the heavy load cylinder rise.

In other words, most people don’t mind pushing a handle down 100 times with 5 lbs of force as long as that force lifts a car that weighs 1000 lb at the wheel. So the jack lets you multiply a little bit of force times a lot of distance to equal raising a large force for a few inches.
Here is the mechanical principles in e-how. I will try to draw a picture to show you how it works. :

http://www.ehow.com/how-does_5561617_bottle-jack-works.html

The oil is pushed from the bottom to the top by a small cylinder that draws oil from a reservoir of oil. It is drawn by a vacuum caused by when you lift the handle you pull the small cylinder up which pulls a vacuum on the fluid. The vacuum causes the check valve to open from the reservoir and pull fluid from the reservoir. Once your handle is pulled to maximum height, then the vacuum has stopped , and the little spring in front of each check valve pushes the ball close to shut off any more oil from coming in.
Once you push down on the handle, now the pressure builds up in the fluid. The taper on the check value causes it to wedge tightly into the reservoir so no fluid can go in there , but the check valve going into the power cylinder is tapered that direction so the fluid goes into the hydraulic power cylinder. Since the volume of this cylinder is so much bigger than the cylinder with the lever you are pushing, the cylinder only rises a 1/8 inch or so. But if you have on a 1000 lb load, then of course that 1000 lb load lifts 1/8th inch with every stroke.

Once you reach the bottom of your push stroke, then no more fluid is entering the power cylinder, so the load starts pushing pack slightly. This pushes the check valve backwards which closes it off so no more fluid can leak out.

Now it starts all over, you draw on the small cylinder and it pulls a vacuum which opens the reservoir and loads up fresh oil into the lines to be squeezed back up into the power cylinder when you start pushing down on the return stroke.
Here is th e pic of power stroke. This is when you are pushing fluid into power cylinder and closing off reservoir so the oil has to flow into large cylinder:

http://i704.photobucket.com/albums/ww43/biire2u/untitled-1-1-1-1-15.jpg?t=1264715257

In this pic, it is the vacuum draw, where you pull oil from the reservoir so you can have oil to push into the load cylinder on power stroke. Notice I put a return line whith a valve, when you want to let thejack back down. The weight of the load on the jack pushes the fluid from the load clinder right into the reservoir if you open up that valve.

http://i704.photobucket.com/albums/ww43/biire2u/untitled-1-1-1-1-15-1-1.jpg?t=1264716324

With the increase in portable electronic and electric devices, the need for batteries has grown geometrically through the years, with no end in sight. Of these types of batteries, sealed lead batteries are the most common. Let’sa explore them in some detail.

Sealed lead batteries were created around 1975 for the purpose of having a power source that was maintenance free while also being economical for both the manufacturer and consumer. Amongst features beyond the sealing of the lead electrolyte from spillage was the formation of special release Valves to allow dangerous gas build-up to release safely. Further, these sealed lead batteries were often designed to be rechargeable (which is when most of the gasses would form in this type of battery).

Two basic types of lead acid batteries were created that survived the tumults of economic and consumer demands. These were the VRLA and SLA batteries. VRLA stands for valve regulated lead acid, whereas SLA is sealed lead acid. Both types are quite synonymous overall, with little difference between them.

One of the best features of these two sealed batteries, when they are rechargeable, includes an excess voltage safety mechanism which disallows the battery’s explosive gas from becoming too great in quantity. This is effected by a depletion of full potential, should the battery become over-energized. The key here is not to over charge a battery.

A great deal of effort has gone into this aspect of rechargeable batteries specifically. Not only do batteries become dangerous when they are overcharged, but on a more economic note, they lose their overall charge through time via the buildup of crystals or corrosion, which limit the amount of electrolyte storage ability.

While this is somewhat ideal for the makers of such batteries, in that it brings in further income once the recharged battery no longer will take a charge and must be replaced, there is a continual race to make this type of lead batteries more efficient and longer-lived. As well, in a time of speed being almost synonymous with efficiency, it should be noted that sealed lead batteries do not charge so quickly. They trickle chargbe over a longer period of time.

However, with lead, as opposed to lithium ion and other types of batteries, the damage and memory loss is next to nil. However, self discharge is still a fact of life, leading between 35 and 45% loss per year. So recahrgeables are not as great as first thought.

Keith Londrie
http://www.articlesbase.com/technology-articles/a-brief-glimpse-at-sealed-lead-batteries-96339.html

How do you adjust the Valves on a 1987 350 roller engine. After I find zero lash do I turn the adjusting nut a half turn or three quarter turn?

Half turn is plenty

I have new central heating. What do I with the Valves on each radiator? Should I set them to maximum and let the thermostat do the controlling? What happens if I turn down the heat setting on a radiator? will it affect the heat of the radiators down stream? If I switch one off completely does it block the pipes? Please explain…

They are mechanical and if you imagine the whole Central heating system not being like a series electrical circuit,but more like a Parallel one, well that’s pretty close.

Looking at the radiator there are two shut down coks at the bottom end of each Radiator .They may be called Radiator Valves —- In order to balance them through out the house i wish to turn the heat down on a few of them . Which of the two valves facing me should be turned down ? Either seems to do the same thing and I am puzzled ? Can any one throw some light on this please? Thanking you in anticipation.

of the two radiator valves, one of them you should be able to turn manually by hand, the other valve is called the lockshield valve, which tyou control by pulling the plastic cap off, then with apair of pliers, grip the little brass top of the valve and turn clockwise till it stops, valve closed, this action will close the radiator off,open anti clockwise and regulate the flow of water till you reach the desired temp,replace cap job done.people will still be able to turn off the other valve, but you will know when as the radiator will go cold. hope this helps, good luck.

There have been a lot of street legal cars with a potential to be a winning race car and the Enzo Ferrari is on of them. But owners of Enzos know well on how to protect their investment. That is why you could almost never see a Ferrari on race tracks.

For those who want a street legal racecar, then the newest sports car/racecar to hit the U.S. will in no time be their vehicle of choice. Premiering in Sebring, Florida this week, the Deronda promises to be one of the fastest street legal cars in the market.

The British car will be manufactured and sold in the U.S. by Autosport Development which is based in Trenton, Michigan. The Deronda is a two-seater vehicle which is designed to look and perform like Formula One cars.

Autosport Development will be producing a limited number of these rockets in Trenton. The Deronda will be present in Sebring, although not to race them but to only make the heads of the crowd turn towards the direction of the vehicle. It is designed in the UK and as the President of Autosport Development David Moxlow says: “The Deronda is basically a road ready two-seater formula car. You can drive it to the track, race it to your heart’s content, and then drive it home and park it in the garage.”

While the Deronda comes with a hefty price tag, Chris Trapp, the head of production for Autosport pointed out its pluses: “At $70,000, the Deronda Sports Car is not exactly in the toy category, even for rich people. But the car is solid, low maintenance, and built from available componentry, so we think it will attract a whole range of enthusiastic customers who can only dream about owning the Ferrari.”

The Deronda is truly a sports car with the ability to burn rubber on speed tracks. Its powertrain is designed by Audi Cosworth Technology. It is equipped with a 1.8 liter turbocharged engine with five Valves per cylinder. Its gearbox also comes from a renowned car maker. The engine is mated to a Porsche five-speed manual transaxle gearbox. The absence of fenders shows how much the design of the car is based on Formula One cars. Not only has the absence of fenders pointed out to the Formula One heritage of the car though.

Aside from that, the Deronda is equipped with double side-impact protection bars, a steel tube chassis, longitudinally-braced double rollover hoops, and front and rear crash bar structures. All of those safety design features comes straight out of a Formula One racing car.

The aerodynamic design and the precision engineered engine and transmission gives the Deronda great acceleration and to speed. The car can go rocket to 60 miles per hour from a standstill in just under four seconds. This figure makes the Deronda one of the fastest sports cars in the world.

KatieJones
http://www.articlesbase.com/automotive-articles/the-perfect-complement-to-an-enzo-ferrari-116258.html

The timing belt broke and caused the Valves to get bent. I do not know what other damage was done but I do know some of the valves got bent. How much should I expect to spend for the entire job.

if the valves are bent you are possibly looking at a complete motor replacement. bent valves usually means damaged cylinders as well. If your lucky enough to have just the valves damaged and not the whole motor wrecked its definitely not going to be cheap. probably around 1000$