What are the differences between a three-cylinder engine and a four-cylinder engine?
1 Answers
The differences between a three-cylinder and a four-cylinder car: different balance and different ignition intervals. The three-cylinder engine uses a three-throw crankshaft. Without balancing measures, it can only achieve static balance but not dynamic balance. The four-cylinder engine uses a four-throw flat crankshaft, where not only the resultant centrifugal inertial force is zero, but the centrifugal inertial moment is also zero, achieving dynamic balance by itself. Here are the relevant details: 1. Different balance: For a four-stroke engine, the main difference between a three-cylinder and a four-cylinder engine is the balance. The balance of a three-cylinder engine is not as good as that of a four-cylinder engine. 2. Different ignition intervals: The ignition sequence of a three-cylinder engine is generally 1-3-2, with an ignition interval angle of 240 degrees. The crankshaft rotation angle for one stroke of the engine is 180 degrees, meaning that within the adjacent ignition intervals, there is a 60-degree crankshaft rotation where all three cylinders consume power simultaneously. The ignition sequence of a four-cylinder engine is generally 1-3-4-2, with an ignition interval angle of 180 degrees. The power strokes of each cylinder are tightly connected without any intervals.
