Ask the master to point out the ignition sequence of the V12 marine engine

1-12-5-8-3-10-6-7-2-11-4-9 can be used as a reference.

Or a1-b5-a5-b3-a3-b6-a6-b2-a2-b4-a4-b1

To explain, looking from the flywheel end to the free end, A1--A6 (1--6 cylinders) refers to the six cylinders on the left, close to the flywheel is A1 (or No. 1 cylinder), B1--B6 (12--7 cylinders) is the six cylinders on the right, and close to the flywheel is B1 (or No. 12 cylinder).

Addendum: If you look closely, you can find that the firing order of the above V12 model is actually overlapping with the firing order (153624) of the L6. Theoretically, all possible firing sequences of the L6 engine could be applied to the V12.

At present, the most common firing sequence used in the world's L6 four-stroke engine is still 153624, which is the best firing sequence after considering the torsional vibration of the shafting and the vibration balance of the whole machine, so the best firing sequence of V12 is what I talked about above.

Again, 142635 can be seen as a 426351, which is exactly the same as the principle of the 153624 firing sequence. It can be understood that if an engine itself can be reversed, and the firing order of the main car is 153624, then the reversing firing order is 426351.

To put it in layman's terms, it is the firing sequence of the 153624, one output shaft rotates clockwise, and the other rotates counterclockwise. This one has no effect.

The engine firing order of V8 and V10 can be set according to the firing order of L4 and L5.

The structure of the V12 engine is not much different from the ordinary V6 engine, the V-shaped arrangement of 6 cylinders on each side, the cylinder angle is 60 °, the double overhead camshaft (DOHC), 4 valves per cylinder, the crankshaft is fixed by 7 bearings, the 12 cylinders are numbered, the left side is 1-6 from front to rear, the right side is 7-12 from front to rear, and a connecting rod on each side is installed on the same crankshaft pin corresponding to the position of the other side, that is, -8....6-12, the ignition sequence adopts the sequence of 1-12-5-8-3-10-6-7-2-11-4-9-1, the biggest advantage of this is to reduce the mutual interference of the intake and exhaust of the cylinder on the same side firstly, can increase the intake and exhaust efficiency, and secondly, the ignition sequence can minimize the vibration of the engine, and at the same time has certain benefits to the smoothness of the engine. Due to the installation of the engine connecting rod, the crankshaft motion characteristics of the V12 engine are similar to those of the L6, so the vibration of the V12 engine is low and the ride is good.

Looking back from the fan end, on the left is the 1-2-3-4-5-6 cylinder; On the right is the 7-8-9-10-11-12 cylinder.

The firing sequence is: 1-12-5-8-3-10-6-7-2-11-4-9

1R-6L-5R-2L-3R-4L-6R-1L-2R-5L-4R-cylinder?

Take a 12V135 diesel engine as an example.

Looking back from the fan end, on the left is the 1-2-3-4-5-6 cylinder; On the right is the 7-8-9-10-11-12 cylinder. The order of ignition is: 1-12-5-8-3-10-6-7-2-11-4-9.

The 4-stroke engine rotates two times in one working cycle, i.e. 720 degrees. In order to maintain the working balance, the ignition interval angle of each cylinder is required to be equal, the ignition interval angle of each cylinder is 180 degrees for 4 cylinders, and 120 degrees for 6 cylinders. There is a sequence in which each cylinder works in a multi-cylinder engine, which is called the ignition order of the engine.

Upstairs says left turn, right turn is

The pinion driven by the starter motor rotates, the pinion drives the flywheel transmission, and the flywheel drives the crankshaft to rotate. The crankshaft is equipped with a connecting rod with cylinder, and the piston movement completes the suction, compression, and gas combustion under high pressure, which pushes the piston to move, and in turn drives the crankshaft to rotate at high speed to transmit external power.

Looking back from the fan end, on the left is the 1-2-3-4-5-6 cylinder; On the right is the 7-8-9-10-11-12 cylinder.

The firing sequence is: 1-12-5-8-3-10-6-7-2-11-4-9

Useful to give good reviews, thank you.

Divide all cylinders into two groups, arrange adjacent cylinders together at a certain angle, make the two groups of cylinders form two planes with an angle, and the cylinders are V-shaped when viewed from the side, so it is called V-shaped engine. The V-engine's small height and length make it easier to arrange on a car. In particular, modern automobiles pay more attention to aerodynamics, requiring the car to have as small a windward side as possible, that is, the lower the engine cover, the better.

Common V-engines are V6, V8, V10, and V12. There are also V3, V5 and V16 (not to be confused with some in-line engines that represent valve counts). As the name suggests, V stands for engine cylinders arranged in a V-shape, generally 90 degrees, which can counteract the vibration during operation and be more stable.

There are also 75 degrees and 72 degrees. Renault even uses a wide-angle V10 engine with more than 90 degrees. Pros:

Stable operation (for V6, V8, V12) and space-saving. Disadvantages: The structure is more complex, which is not conducive to maintenance and repair, and the cost is high.

At the same time, V3, V5 and V10 are not very stable due to their structure or displacement, especially the V10 3L engine as an F1 engine, which needs to invest a lot of energy and money to ensure its stability. Representative models: Audi A6, Ferrari 360, Porsche Carrear GT, Mercedes-Benz S600.

V6, V8, V10, V12 engines are used. While the V3 is mainly seen on some motorcycles, the V5 is said to have been used on the previous generation of Volkswagen Golf. And the V16 can be found on some luxury classic cars.

There are two types of V-type engines: first of all, we must figure out the cylinder sequence, because the arrangement method of the cylinder serial number of the V-type engine is not uniform. Generally speaking, if a person sits in the cab, if the cylinder sequence is right from front to back, it is : and left from front to back. The firing order is generally: 1 4 5 2 3 6.

If the right side is backward from the front, the left side is from the back of the front. The order of the dots is generally as follows:

The ignition sequence of the engine is not the same, and it depends on what engine it is, because the V-type engine is complex to manufacture and has high cost, so it is now basically used in more than 8 cylinders!

In the case of Lamborghini's 12-cylinder gasoline engine, his ignition sequence is 1-7-4-10-2-8-6-12-3-9-5-11