Valve Definition and 218 Threads

Hi guys, i am doing some calculations on the valve spring of a 4 stroke, 4 cylinder motor vehicle engine. To my understanding, valve bounce will occur once the valve spring is operated at a speed over their natural frequency (which i calculated to be 5500 rev/min). If i were to push the...

Hi guys, i am doing some calculations on the valve spring of a 4 stroke, 4 cylinder motor vehicle engine. To my understanding, valve bounce will occur once the valve spring is operated at a speed over their natural frequency (which i calculated to be 5500 rev/min). If i were to push the...

Hi! I am working with ball valves and I need to calculate the cv for several sizes. I only knows the pressure drop expressed in terms of the "equivalent feet". Unfortunally, I do not have a lab to measure. thanks a lot!

what's the difference between AC and DC power source for solenoid valve?and what is mainly the power consumed for? for mature products available, what should be taken into consideration for power design? thanks

I am wondering if anyone has a source for the specs on beverage container valves? I am looking for replacement o-rings and I don't have the valves in front of me, so if someone has a source for the specs, that would be great. Thanks!

Please help me in this problem... How to design a valve for gas stream? To be more spicific let's assume that we have aflow rate of 40000 cm3/h of CH4 ?

Consider an apparatus where there are two rigid glass bulbs separated from one another by a valve that is closed initially. Bulb #1 has a pressure of 1.3 atm and a volume of 4.27 L and bulb #2 has a pressure of 6.6 atm and a volume of 7.40L. What is the final pressure (in atm) in the apparatus...

A DOHC engine has the valves controlled by two servo motors, an engine speed encoder controls the valves possitions via electronics, this is an obviuos solution to four stroke ice valve control, what are the reasons why it is not used?

Hi, I'm a newbie :frown: Now,I'm studying about general engineering! And I had difficulty finding materials of EXHAUST VALVE. Everyone,can you help me? Where and how I can get them?

The auto industry will be using this method to contol inlet and exhuast valves, i think 6000 rpm is the limit so far with a 48v (coil), this system has many advantages ie variable valve timing/ dwell, what are the limitations of this idea and could it be retro fitted to cam shaft engines?

I was wondering anyone could help me figure out the type of valve I need. The application is I have two sources of water going into the same reservoir and I want to be able to switch between the two. I am currently looking at Direct-Acting Solenoid Valves 3 way Now I am noticing some...

Hi I’m writing my bachelor thesis about valves, and was wondering if anyone could help me with the following derivation: I need to show the algebraic link between the mechanical energy-equation and the ”valve equation” that is Cv=Q * [Square](Sg/[Delta]p). This can also be called the flow...

Why isn't Ferrari Variable valve timing - they have a 3d cam with variable profile along its length and shift the camshaft to provide variable valve timing, why isn't it popular? Is it because of the cost?

I'm currently part of the propulsions team for a hybrid rocket project here on campus, working on the liquid fuel injector system. Specifically I'm trying to model which injector designs give us the best burn rate over the entire burn. However, I'm a physics major, not an engineering major, so...

Hello May you tell me what is the best theoretical shape around a valve guide for best flowing in an combustion engine ? best regards Philippe

I'd like to put a valve (like the ones on tire tubes) that will connect to a bicycle pump onto a PVC tube (on the side, or at the end). Anyone know how I can do this? What fittings will I need? Thanks.

I am looking for a method of actuating a valve on a musical instrument. This particular valve needs to rotate 90 degrees, but on some instruments, 120 degrees. I will like to actuate via wire control i.e. with a embedded computer. For example, close a switch, the valve rotates 90 degrees and...

a lever is resting on a valve. the valve is located 3 in from the end of the lever. the total length of the lever is 9.5 in. a 4 lb force is present at the opposite end of the lever. the force makes a 28 deg angle with the lever. the lever makes a 20 deg angle with the horizontal. I am supposed...