| 摘要 |
During operation of an internal combustion engine, structures adjacent the piston top ring turn around position and the exhaust port are exposed to high temperatures. In order to improve cooling around these adjacent structures, the heat transfer coefficient must be increased. In this manner, energy around the top ring turn around position on the cylinder liner and around the exhaust seat can be transferred through a cooling liquid and away from the adjacent structures. The present invention enhances the cooling capability within an engine (10) by utilizing a flow controlling device (60) disposed between a cooling liquid inlet chamber (46) and a cylinder liner (27). The flow controlling device (60) has a plurality of orifices (70) therein. A cooling liquid from a pressurized source is communicated to the inlet chamber (46) and passes through the plurality of orifices (70) to impinge a predetermined peripheral portion of the cylinder liner (27) adjacent an exhaust port (38). Due to the small size of the orifices (70), the velocity of the cooling liquid is increased as it passes therethrough. The increased velocity of the cooling liquid and the subsequent impingement upon a required, selected portion of the cylinder liner (27) increase the overall cooling effectiveness.
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