| 摘要 |
<p>A four-stroke engine without a crankshaft and valves comprises: a base including a gas groove, a first cylinder, a second cylinder, two gas flowing holes, a first inlet, a first outlet, and a holder; a gas valve including a connecting rod, a second inlet, and a second outlet; a driving device including two pushing posts, a rotating arm, a rotary shaft; a gear set including a panel, an upper gear, and a bottom gear, wherein the drive gear has a second tilted bar and the second tilted bar has a second opening arranged thereon, and a second rotatable bearing; and a seat including a peripheral side coupling with a top rim of the holder, a fixated pole axially connecting with the holder and the base, wherein a top end of the rotary shaft extends out of the seat.</p> |
