When pistons are closest together on an opposed-piston engine it is known as?

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Multiple Choice

When pistons are closest together on an opposed-piston engine it is known as?

In an opposed-piston engine, two pistons move toward and away from each other inside the same cylinder. The position where they are closest together is the point where their motion momentarily stops and reverses—this is called the inner dead center. It’s the zero-velocity, minimum-gap position between the pistons, not one of the outer extremes. Outer dead center would be the opposite extreme where the pistons are far apart. Upper and lower dead center are terms used for single-piston configurations and don’t fit the two-piston layout.

In an opposed-piston engine, two pistons move toward and away from each other inside the same cylinder. The position where they are closest together is the point where their motion momentarily stops and reverses—this is called the inner dead center. It’s the zero-velocity, minimum-gap position between the pistons, not one of the outer extremes. Outer dead center would be the opposite extreme where the pistons are far apart. Upper and lower dead center are terms used for single-piston configurations and don’t fit the two-piston layout.

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