| 摘要 |
PURPOSE: A radiator cap of a vehicle is provided to prevent the bursting due to freezing in winter by making a driver directly check the density of an anti-freeze coolant and the amount of cooling water through an observation window. CONSTITUTION: A radiator cap includes a cap part(10) and a pressure sensor. The cap part has a transparent window(10a). An internal pressure gauge(10b) is installed in the transparent window. Preferably, a hollow hole is formed in the cap part. Litmus paper for checking the density of an anti-freeze coolant is mounted in the hollow hole. The pressure sensor measures the internal pressure of a radiator.
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