The utility model relates to a single cylinder internal combustion engine, including a cylinder cover, the cylinder cover is provided with a vent is provided with a valve plate in the radial direction of the exhaust passage on the valve plate which is fixed on a position of a rotatable shaft, wherein the positioning shaft is arranged in the exhaust tract, and its one end into a in an exhaust passage and is connected with the valve, the other end is connected with a valve can change the rotating positioning handle, the valve and the positioning shaft as the center axis asymmetry. In the utility model, a valve plate is arranged in the exhaust passage of the cylinder head, and the valve plate can hold up the warming gas at the starting time, accumulate energy, improve the low temperature starting performance, and automatically open after starting. The utility model has simple structure and can greatly improve the starting performance of the internal combustion engine, and the utility model not only takes into account the energy saving and emission reduction, but also does not influence the starting performance.
【技术实现步骤摘要】
【技术保护点】
１．一种单缸内燃机，包括气缸盖，气缸盖内设有排气道，其特征在于：在所述的排气道的径向方向上设有一阀片，所述的阀片固定在一可旋转的定位轴上，所述的定位轴设置在排气道外，且其一端伸入排气道内并连接所述的阀片，另一端连接一能改变阀片旋转状态的定位手柄，所述的阀片以定位轴为中心轴不对称。
【技术特征摘要】
【专利技术属性】
技术研发人员：袁宜程，陈公一，蒋世晓，韩行，裘海波，罗玉珍，潘农科，
申请(专利权)人：慈溪三环柴油机有限公司，
类型：实用新型
国别省市：33
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