four-stroke engine

四衝程[動力]機（中國用語：四衝程發動機）

學術名詞

• 四行程引擎：電機工程
• 四衝程引擎：機械工程
• 四衝程[動力]機：機械工程

英文釋義

1. an internal-combustion engine in which an explosive mixture is drawn into the cylinder on the first stroke and is compressed and ignited on the second stroke; work is done on the third stroke and the products of combustion are exhausted on the fourth stroke