Theres a reason inline four-cylinder engines are rarely bigger than 2.5 liters, and that has to do with the second-order vibrations they give off due to their inherent secondary imbalance.

The article takes a closer look at 4-cylinder vs 6-cylinder engines ... Both four and six-cylinder engines are typically four-stroke, and operate in the same way, albeit just with different ...

In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder. The sequence shown on the next page represents this behavior for a Mitsubishi direct ...