在风扇的空气人口处,通常装有活动的百叶窗,它受恒温器控制能自动地开闭,以保持气缸温度尽可能稳定。当发动机加大负荷工作时,进来的空气就多些,而在发动机空转时,进来的空气就少些。

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问题 在风扇的空气人口处,通常装有活动的百叶窗,它受恒温器控制能自动地开闭,以保持气缸温度尽可能稳定。当发动机加大负荷工作时,进来的空气就多些,而在发动机空转时,进来的空气就少些。

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答案The fans are often fitted with movable shutters to their air intakes which open and close automatically under the control of thermostats to keep the cylinder temperatures as even as possible, admitting more air when the engine is working hard and less when it is idling.

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