Sentences with phrase «during the expansion strokes»

The higher compression ratio in diesels means they are harder to start, but once they are running the energy expended in compressing air is regained during the expansion stroke when the compressed air is allowed to «spring» back, so the higher compression ratio causes negligible engine braking via energy being lost as friction and heat of compressed air to engine block.

Because of uneven levels of torque during the expansion strokes divided among the five cylinders, there are increased second - order vibrations.