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    • 5. 发明申请
    • TWO-STROKE-CYCLE INTERNAL-COMBUSTION ENGINE WITH UNIFLOW SCAVENGING
    • 两冲程循环内燃机
    • WO2003016693A1
    • 2003-02-27
    • PCT/JP2002/002810
    • 2002-03-22
    • DAIHATSU MOTOR CO.,LTD.FUJIMURA, Ichiro
    • FUJIMURA, Ichiro
    • F02B25/00
    • F02B25/04F02B2075/025F02F1/22
    • A two-stroke-cycle internal-combustion engine with uniflow scavenging includes a cylinder block (2) provided with cylinders (3). An exhaust valve (11) is provided at the top of each cylinder (3). The engine also includes a scavenging port (8) for supplying compressed air into the cylinder. To this end, the scavenging port (8), which is opened to the cylinder (3), uncovers when the piston (7) in the cylinder (3) is brought to the lower dead center. The lower portion of the cylinder located under the scavenging port is surrounded by a first coolant jacket (12) into which the coolant is introduced. Further, the upper portion of the cylinder located above the scavenging port is surrounded by a second coolant jacket (13) into which the coolant is supplied from the first coolant jacket (12). This double-jacket arrangement contributes to effective cooling of the piston (7).
    • 具有单流清扫的二冲程循环内燃机包括具有气缸(3)的气缸体(2)。 在每个气缸(3)的顶部设有排气门(11)。 发动机还包括用于将压缩空气供应到气缸中的扫气口(8)。 为此,当气缸(3)中的活塞(7)被带到下死点时,向气缸(3)开口的扫气口(8)露出。 位于扫气口下方的气缸的下部被引入冷却剂的第一冷却剂套(12)包围。 此外,位于清扫口上方的气缸的上部由第二冷却剂套(13)围绕,冷却剂从第一冷却剂套(12)供应到其中。 这种双夹套布置有助于有效地冷却活塞(7)。