One-Half Rotation

1. A complete circle is divided into 360 degrees; equal to one crankshaft rotation; 180 degrees is one-half rotation.

Terms

1. Like centerline, it is measured in terms of degrees of crankshaft rotation.

Stroke

1. Each stroke consists of 180°, of crankshaft rotation and hence a cycle consists of 720°of crankshaft rotation.
2. Cam events take place in fairly restricted regions of crankshaft rotation, so the stroke need not be specified.

Exhaust

1. Commonly, intake and exhaust occur over approximately 96° of crankshaft rotation.

Pistons

1. The reciprocating motion of the pistons is translated into crankshaft rotation via connecting rods.

Valve Timing

1. By rotating the camshaft relative to crankshaft angle, valve timing is infinitely variable over a 50-degree range of crankshaft rotation.
2. Valve timing is varied over a range of 60 degrees in terms of crankshaft rotation with a wider adjustment range than that of other BMW engines.

Lifter

1. The number of degrees of crankshaft rotation are then counted until the lifter comes back down to within 0.004 inches of the base circle.

Time

1. This translates into about twenty degrees more crankshaft rotation providing much more time for air to be forced into the combustion chamber.

Duration

1. At 7500 rpm the spark of a conventional ignition system, with a duration of 3 milliseconds, will take 135 degrees of crankshaft rotation to finish.

Spark Timing

1. Spark timing happens in degrees of crankshaft rotation and piston location.

Piston

1. After the piston travels three-quarters of its (down) stroke, or 132° ATDC of crankshaft rotation, the piston starts to uncover the inlet ports.
2. From the crankshaft end of things, the operation is very simple: the piston is moving straight up or straight down every 180 degrees of crankshaft rotation.

Crankshaft

1. Therefore, it requires two rotations of the crankshaft, or 720° of crankshaft rotation (360° x 2) to complete one cycle.

Bottom Dead Center

1. Just before the charge is finished combusting, the exhaust valve is opened at approximately twenty degrees of crankshaft rotation before bottom dead center.
2. To this end, the exhaust valve is typically opened at about twenty degrees of crankshaft rotation before bottom dead center.

Degree

1. Degree of Crankshaft Rotation All events that occur in an engine are related to the location of the piston.
2. As a general rule-of-thumb the pressure rise in the combustion chamber during the combustion phase is typically 20-30 PSI per degree of crankshaft rotation.
3. The HotWires spark needs less than one degree of crankshaft rotation to complete.

Degrees

1. Duration is how long the cam holds the valves open, and is specified in degrees of crankshaft rotation.
2. VALVE TIMING is the opening and closing points of the valves measured in relation to the degrees of crankshaft rotation.
3. Ignition timing is the measurement, in degrees of crankshaft rotation, of the point at which the spark plugs fire in each of the cylinders.

Valve

1. Duration is the amount of time that the valve is open in relation to crankshaft rotation.

Valve Seat

1. SEAT DURATION: The total time in degrees of crankshaft rotation that the valve is off of its valve seat from when it opens until when it closes.

Crankshaft Rotation

1. Because the piston is connected to the crankshaft, any location of the piston corresponds directly to a specific number of degrees of crankshaft rotation.
2. DURATION AT.050": The amount of time measured in degrees of crankshaft rotation from when the valve is open.050" far until it is.050" from closing.
3. The time at which valves open and close (valve timing) and the duration of the valve opening in stated in degrees of crankshaft rotation.

Categories

1. Valve Seat
2. Information > Knowledge > Education > Degrees
3. Bottom Dead Center
4. Exhaust Valve
5. Liquids > Water > Valves > Valve Timing
6. Books about "Crankshaft Rotation" in Amazon.com
   

Continue: More Keywords - - - - - - - - - -