﻿ "Valves" related terms, short phrases and links
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  Encyclopedia of Keywords > Intake > Valves   Michael Charnine

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    This Review contains major "Valves"- related terms, short phrases and links grouped together in the form of Encyclopedia article.


  1. Valves are flaps of tissue that stop blood flowing backwards and so control the direction of blood flow in the heart. (Web site)
  2. Valves are provided in a cylinder head to open and close the ports. (Web site)
  3. The valves are timed so the intake valve opens slightly before the piston reaches top dead center (TDC) on the exhaust stroke. (Web site)
  5. Valves (refer to figure 8) are mechanically opened and closed to admit or exhaust the gasses as needed.

Valvular Heart Disease

  1. Valvular heart disease is a disease that affects the valves of the heart. (Web site)


  1. Endocarditis can involve the heart muscle, heart valves, or lining of the heart. (Web site)
  2. Endocarditis is inflammation of the inside lining of the heart chambers and heart valves. (Web site)
  3. Regurgitation also increases the risk of infective endocarditis, an infection of the lining of the valves. (Web site)

Bacterial Endocarditis

  1. Bacterial endocarditis is an infection of the lining of the heart, valves, or arteries.
  2. Bacterial endocarditis (BE) is an infection of the valves and inner lining of the heart (called the endocardium).
  3. Some heart defects and their repairs can increase the risk of bacterial endocarditis, a serious infection of the heart valves or lining of the heart. (Web site)


  1. FIG. 16 shows the expander piston moving downwards with all valves closed while the compressor piston is moving downwards with the intake valve open. (Web site)
  2. The side that is in position for adjustment will have both valves closed. (Web site)


  1. Typically, the actuation of the engine valves is timed to coincide with the reciprocating movement of a series of pistons. (Web site)
  2. This invention relates to actuation of engine valves capable of independent control of their opening and closing points. (Web site)
  3. In this manner, the shape and orientation of cam 60 controls the timing of the actuation of intake valves 32. (Web site)


  1. The heart has four valves - the aortic, mitral, pulmonary and tricuspid valves - that open and close to direct blood flow through your heart. (Web site)
  2. Blood flows from your right and left atria into your ventricles through the open mitral and tricuspid valves. (Web site)
  3. Echocardiography demonstrated thickened aortic, mitral and tricuspid valves with regurgitation. (Web site)

Lower Chambers

  1. Also, the tricuspid and mitral valves that normally separate the heart's upper and lower chambers aren't formed as individual valves.

Closed Positions

  1. The camshaft turns in time with the crankshaft and actuates the valves into opened and closed positions. (Web site)
  2. The intake valves 43 are urged to their closed positions by means of coil compression springs 51 (FIG. 1) which act against tappet-type actuators 52. (Web site)
  3. A coil compression spring 37 cooperates with a keeper retainer assembly for urging the intake valves 34 to their closed positions. (Web site)

Closed Position

  1. Springs return the valves to their closed position. (Web site)
  2. When the intake valve is operated from a closed position to an open position, the intake and exhaust valves move together.
  3. Valve clearance is measured when the engine is at Top Dead Centre (TDC). At Top Dead Centre, both valves are in the closed position.


  1. Spring return valves are about the most commonly-used and most basic type of valvetrain in engines today. (Web site)
  2. Basically, as the camshaft rotates in the engine, the lobes lift the valvetrain and actuate the valves accordingly. (Web site)
  3. A valvetrain with a total of four valves in the combustion chamber, typically two intakes and two exhausts.

Valve Springs

  1. If an engine spins too quickly, valve springs cannot act quickly enough to close the valves. (Web site)
  2. Distributor of engine valves, racing valves, valve seats, valve guides, valve springs, oil pumps, new water pumps and expansion plugs.
  3. By the time the action of the cam lobe has ceased, the valve springs will have closed the valves. (Web site)

Exhaust Port

  2. Intake and exhaust valves move between an opening position and a closing position of the intake port and the exhaust port, respectively. (Web site)
  3. Flow of combusted gases through each exhaust port is controlled by actuation of one or more exhaust valves 24. (Web site)

Exhaust Ports

  1. Meanwhile, the sides of the piston are acting like valves, covering and uncovering the intake and exhaust ports drilled into the side of the cylinder wall. (Web site)
  2. This requires inlet and exhaust ports at either end of the cylinder (see the animated expansion engine below) with steam flow being controlled by valves. (Web site)
  3. Poppet valves are used in most piston engines to open and close the intake and exhaust ports in the cylinder head. (Web site)

Low Rpm

  1. The reason for this is that the valves are now open too long at low RPM and the cylinder is bleeding off pressure it uses to build torque. (Web site)
  2. In addition, PZEV variants also idle one of the two exhaust valves in each cylinder at low rpm for enhanced emissions performance. (Web site)
  3. Only Stage 1 and Stage 3 are used: one intake valves open at low RPM, both intake valves open taller and for longer duration at high RPM.

Valve Overlap

  1. VALVE OVERLAP is the term used when the piston is at top dead center and both the intake and exhaust valves are off their seats the same amount. (Web site)
  2. Valve overlap could thusbe properly maintained by changing the timing of both VVT controlled valves 8,9. (Web site)
  3. Thus, the valve overlap between the intake and exhaust valves becomes small and the intake valve closes late. (Web site)

Valve Trains

  2. Then there's the complexity of valves and valve trains, timing belts, tappets, springs, fuel delivery systems etc.etc. (Web site)
  3. The intake valves and exhaust valves are operated through valve trains 20.

Valve Train

  1. As a result, the valve train becomes more difficult to control as well as the clearances between intake and exhaust valves or intake valve and piston. (Web site)
  2. The intake and the exhaust valves are opened and closed in a timed sequence by the valve train. (Web site)
  3. The valve train comprises first and second rockers, and three valves. (Web site)

Exhaust Gases

  1. As a result, the piston pulls from the intake and exhaust valves simultaneously causing the exhaust gases to flow in a reverse direction. (Web site)
  2. Therefore, collisions between the valves and the piston crown surface are avoided while scavenging flow of exhaust gases is enhanced. (Web site)
  3. Fuel injection valves inject fuel for each cylinder and oxygen concentration of exhaust gases is detected. (Web site)

Injection Valves

  1. The injection valves inject the fuel allocated by the fuel distributor into the intake ports directly in front of the intake valves of the cylinders. (Web site)
  2. The injection valves are controlled by an electronic control unit (ECU) and the amount of fuel injected depends upon the length of time that they stay open. (Web site)
  3. With hydrogen being injected into the intake manifold as late as possible, the injection valves have to meet very demanding requirements. (Web site)

Spark Plug

  1. Spark plug valves. (Web site)
  2. Combustion stroke: With the valves still closed, the fuel is ignited by the spark plug.
  3. The air is then compressed by the piston while all the valves are closed and ignited by the spark plug. (Web site)
  4. The spark plug is in the center of the four valves in each cylinder. (Web site)

Three Valves

  1. For instance, the engine can be a gasoline engine, or the number of valves per cylinder can be changed (such as three valves). (Web site)
  2. The three valves are preferably circular and spaced around the cylinder centerline in said cylinder head. (Web site)
  3. A central, fourth, spark plug may be located substantially on the cylinder axis, surrounded by the three valves. (Web site)


  2. Inlet valves open to allow fuel to enter the combustion chambers. (Web site)
  3. It is a further object to provide a deep well pump having one or more inlet valves which has a very low pressure drop through the inlet valve. (Web site)

Outlet Valves

  1. This cycle includes the opening and closing of the two inlet and outlet valves of the right and left ventricles of your heart.
  2. Then, during diastole, the blood flows out, into the aorta, through one or more outlet valves along the cannula downstream from the inlet valve. (Web site)
  3. FIG. 3 illustrates schematically an alternative construction of outlet valves 30, in accordance with another preferred embodiment of the present invention. (Web site)

Combustion Chambers

  1. The combustion chambers are integrated within the cylinder head, which is where the valves and spark plugs are located.
  2. They house the spark plugs, combustion chambers, valves and valvetrain.
  3. Two bottles should have them spotless and will clean the valves, ports, and the combustion chambers. (Web site)

Combustion Chamber

  1. The gas may also be exposed to heat from the cylinder head porting, piston, valves, and walls of a combustion chamber during the intake stroke. (Web site)
  2. Combustion chamber 3 of each cylinder has a spark plug 4, and intake and exhaust valves 5 and 6 of an electromagnetic drive type. (Web site)
  3. Cylinder head consists of a platform containing most part of the combustion chamber and the location of the valves and spark plugs.


  1. Like veins, the lymphatic tributaries have thin walls and have valves to prevent backflow of blood. (Web site)
  2. Lymph flows from small lymph capillaries into lymph vessels that are similar to veins in having valves that prevent backflow. (Web site)
  3. The lymphatic vessels, like veins, have one-way valves that prevent backflow. (Web site)

One-Way Valves

  1. Superficial and perforator veins have one-way valves within them that allow blood to flow only in the direction of the heart when the veins are squeezed. (Web site)
  2. Normally, one-way valves in your veins keep blood flowing from your legs up toward your heart. (Web site)
  3. Your heart valves keep blood flowing in one direction through your heart, just like the one-way valves in your home's plumbing. (Web site)

Timing Belt

  2. If a timing belt breaks, the cam will stop spinning and the piston could hit the open valves. (Web site)
  3. The timing belt is what coordinates the opening and closing of the intake and exhaust valves. (Web site)


  2. On this stroke, all of the valves remain closed as the piston is driven up the cylinder wall by the crankshaft. (Web site)
  3. The timing of both valves, likewise that of the pistons, iscontrolled by the rotational phase of the crankshaft. (Web site)

Blood Clots

  1. Emboli can originate from blood clots that form at the site of artificial heart valves in 4 - 5% of patients. (Web site)
  2. However, they can cause blood clots, so patients with mechanical valves must take anticoagulants for the rest of their lives. (Web site)
  3. Pregnant women with mechanical prosthetic (artificial) heart valves may be at higher risk for blood clots. (Web site)

Artificial Heart Valves

  1. Prothrombin times are also kept at longer times for people with artificial heart valves, because these valves have a high chance of causing clots to form.
  2. He or she also can look for abscesses inside the heart and for signs of damage to natural or artificial heart valves. (Web site)
  3. For instance, a patient with artificial heart valves or a history of infection of the lining of the heart may need to take antibiotics to prevent infection. (Web site)

Rheumatic Fever

  1. Permanent damage to the valves of the heart usually caused by repeated attacks of rheumatic fever. (Web site)
  2. Rheumatic fever causes inflammation of the valves of the heart, as well as other complications.
  3. Rheumatic fever can cause permanent damage to the heart that may result in serious harm to the heart valves and heart failure. (Web site)


  1. Causes Endocarditis is an inflammation of the endocardium, the inner lining of the heart chambers and valves. (Web site)
  3. Following heart surgery, extreme care must be followed to prevent endocarditis (inflammation of the lining of the heart cavity and valves). (Web site)


  1. The longer the valves are open, the higher the rpm at which the cam is effective. (Web site)
  2. Valve lift is how far the cam opens the valves. (Web site)
  3. In a single overhead cam engine (SOHC), one cam has enough lobes to drive both the intake and exhaust valves.


  1. The valves are typically operated by a camshaft, which is a rod with a series of oblong protrusions called lobes or cams. (Web site)
  2. Camshafts, Valve Springs and Valves When it comes to cams in the B-series engine, you can swap them back and forth without problems.
  3. Most engines use overhead cams, or even dual overhead cams, as in the illustration, in which cams directly actuate valves through a flat tappet.

Blood Flowing

  1. Innocent heart murmurs are caused by blood flowing through the chambers and valves of the heart or the blood vessels near the heart. (Web site)
  2. Valves within the heart keep the blood flowing in the correct direction. (Web site)
  3. Venous reflux disease develops when the valves that keep blood flowing out of the legs and back to the heart become damaged or diseased. (Web site)

Four Valves

  1. The inside of your heart contains four chambers and four valves lined by a thin membrane called the endocardium. (Web site)
  2. Many vehicles, including all current Toyota vehicles, have four valves per cylinder: two intake and two exhaust.
  3. By having four valves in a cylinder instead of two, a larger portion of the area can be used to let air in and exhaust out. (Web site)


  1. The valves are opened by a system of rotating cams and pushrods driven by a camshaft which in turn is timed and driven from the crankshaft. (Web site)
  3. In pushrod engines the size and shape of the intake ports as well as the position of the valves are limited by the pushrods.


  1. It is usually caused by narrowing of the mitral or tricuspid valve (the valves between the atria and the ventricles). (Web site)
  2. The ventricles, atria, septa, valves, veins and outflow tracts become identifiable. (Web site)
  3. Carcinoid heart disease results from deposition of plaques on the endocardium of the valves and atria; this usually occurs on the right side of the heart. (Web site)

Heart Chambers

  1. Echocardiogram provides information about the size and shape of your heart and how well your heart chambers and valves are functioning. (Web site)

Rocker Arm

  1. In later developments, overhead camshafts eliminated the pushrod and, occasionally, the rocker arm for a more direct actuation of the valves. (Web site)
  2. The valves are opened and closed either directly with a shim between the cam lobe and the valve stem, or via a rocker arm.
  3. Each set of two valves are controlled by one rocker arm, which is operated by the camshaft.

Rocker Arms

  1. The camshaft in the block pushes directly on the valve stems to open the valves, eliminating the need for pushrods and rocker arms.
  2. Some methods include advancing or retarding the cams or valves or activating additional camshafts or rocker arms.
  3. With overhead-cam designs camshafts are disposed over the valves above the head, and valve deflection is accomplished without push rods or rocker arms. (Web site)


  1. For a four-stroke engine, key parts of the engine include the crankshaft, one or more camshafts (magenta and blue) and valves. (Web site)
  2. VANOS varies the timing of the valves by moving the position of the camshafts in relation to the drive gear. (Web site)
  3. Pulleys, cylinder heads, camshafts, connecting rods, oil pumps, piston and cylinder kits, and valves are available. (Web site)


  1. In most such designs the camshaft remained relatively near the crankshaft and the valves were operated through pushrods and rocker arms.
  2. The position of the valves is determined by the camshaft; the position of the piston is determined by the crankshaft. (Web site)
  3. Depending on the location of the camshaft, the cams operate the valves either directly or through a linkage of pushrods and rockers. (Web site)


  1. Region 34 contains liquid oil for lubricating the crankshaft and the slide valves to be described. (Web site)
  3. The modern slide trumpet is a B-flat trumpet that has a slide instead of valves.


  1. I'm tempted to get all new valves and seats (& springs?) if I have to take the head back off. (Web site)
  2. When valves and seats are ground or cut, the valves sit deeper in the head than before. (Web site)
  3. Do NOT lap the valves, period, if you want the seats and valve faces to last any length of time. (Web site)


  1. Intake
  2. Encyclopedia of Keywords > Society > Humans > Heart
  3. Cylinder
  4. Encyclopedia of Finance. > Technology > Engines > Piston
  5. Timing


Valve Timing

    Related Keywords

      * Air * Blood * Cam Lobes * Chamber * Chambers * Close * Closing * Closure * Combustion * Compression * Control * Cylinder * Cylinders * Cylinder Head * Damage * Duration * Engines * Exhaust * Exhaust Valves * Fuel * Heart * Heart Valves * Intake * Intake Valves * Lift * Lifter * Lifters * Opening * Piston * Pistons * Piston Valves * Ports * Pump * Pumps * Time * Timing * Valve * Valves Close * Vein * Veins * Ventricle * Ventricles
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      Short phrases about "Valves"
      Originally created: August 01, 2010.
      Links checked: February 23, 2013.
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