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Anonymous users2024-02-05The relative angular position of the intake and exhaust cams of the same cylinder is the relative angular position of the cam with the same name, which is determined by the timing of the gas distribution and the camshaft.
Direction of rotation. The angle between the exhaust cam and the intake cam of the same cylinder is slightly greater than 90 degrees, and the analysis is as follows:
1. One working cycle crankshaft rotates 720 degrees, and the camshaft rotates 360 degrees.
2. Theoretically, the cam angle is 90 degrees, because the exhaust advance angle is 40-80 degrees, and the intake advance angle is 0-30 degrees. Therefore, from the opening of the exhaust valve to the opening of the intake valve, the corresponding crankshaft angle is greater than 180 degrees.
3. Therefore, the angle between the exhaust cam and the intake cam of the same cylinder on the camshaft is slightly greater than 90 degrees.
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Anonymous users2024-02-04The angle of the cam with the same cylinder and the same name = 90 ° + (e1 - e2 + i2 - i1) 4
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Anonymous users2024-02-03All intake cams are called cams of the same name, all exhaust cams are also called cams of the same name, and the number of cam clamp angles of the same name is divided by 360 by the number of cylinders. The relative angular position of each cam with the same name (each intake cam or each exhaust cam) on the camshaft is related to the direction of rotation of the cam shaft, the engine working sequence, and the number of cylinders or the angle of work interval. If the camshaft rotates counterclockwise from the fan end of the engine, the angle between the cams of the same name is 60° for a six-cylinder engine with a working sequence of 1-5-3-6-2-4
The relative angular position of the intake and exhaust cams of the same cylinder is the relative angular position of the cam with the same name, which is determined by the timing of the gas distribution and the direction of rotation of the camshaft.
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Anonymous users2024-02-02First of all, the relative angular position of the intake and exhaust cams of the same Lixun cylinder is the relative angular position of the cam with the same name, which is determined by the timing of the gas distribution and the direction of rotation of the camshaft.
Let's take a look at "Camshaft Construction" and "Camshaft Working".
The camshaft is supported in the camshaft bearing bore by the camshaft journal, so the number of camshaft journals is an important factor affecting the camshaft support stiffness. If the camshaft stiffness is insufficient, bending deformation will occur during operation, which will affect the timing of the gas distribution. The undermounted camshaft is provided with a camshaft journal every 1 2 cylinders.
How camshafts work.
The timing and duration of opening and closing of the intake and exhaust valves, as well as the speed at which they open and close, are controlled by the intake and exhaust cams on the camshaft, respectively. The cam profile of the lower speed of the engine excavator is composed of several arc segments, which is called the arc cam. High-revving engines use a function cam whose profile is formed by a kind of functional curve.
The point o is the center of rotation of the camshaft, the AB and DE segments on the cam profile are the buffer sections, and the BCD segments are the working sections. The tappet starts to rise at point A, stops moving at point E, the cam turns to a point within the AB segment, the valve clearance is eliminated, and the valve begins to open. After that, as the cam continues to rotate, the valve gradually opens and widens, reaching the maximum valve opening at point C.
The valves then close gradually, at some point in the DE segment the valves are completely closed, and then the valve clearance is restored. The valve opens at point B at the latest, and closes completely at the earliest at point D. Since the valve opens and closes when the seat is seated at the beginning of the opening and closing of the seat, the speed of movement is small, which prevents strong shocks.
The relative angular position of each cam of the same name (each intake cam or each exhaust cam) on the camshaft is related to the direction of rotation of the camshaft, the working sequence of the engine and the number of cylinders or the angle of work interval. If the camshaft rotates counterclockwise from the engine fan end, then the four-cylinder engine of the working sequence of 1-3-4-2 has its work interval angle of 720 ° 4 180 ° crankshaft angle, which is equivalent to 90 ° camshaft angle, that is, the angle between each cam of the same name is 90 °. For a six-cylinder engine with a working sequence of 1-5-3-6-2-4, the angle between the wheels of the same name is 60°.
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