| 摘要 |
To improve the performance of a cooling system for an engine which includes a cylinder bore and a water jacket formed in an engine body, and in which a thermostat is attached to the engine body so that it projects from the engine body as little as possible, and is protected against hunting regardless of abrupt variations in cooling water temperature. A cylindrical thermostat includes a sliding space therein. Furthermore, the thermostat includes a housing having an inlet and an outlet facing each other. A wax case is slidably fitted in the sliding space in order to enable or disable communication between the inlet and the outlet in response to the expansion or contraction of the wax. An axis of the sliding space is parallel to an axis of a cylinder bore. The housing is directly attached to a body of the engine.
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