Abstract:
An expansion tank includes a plurality of partition walls separating a storage chamber of the tank main body into a plurality of compartment chambers, each partition wall provided with a lower communicating portion and an upper communicating portion formed in a lower part and an upper part thereof, respectively, to communicate the adjoining compartment chambers to each other, wherein the compartment chambers include an inlet chamber having an inlet, an outlet chamber having an outlet, and intermediate chambers, and wherein one of the compartment chambers other than the outlet chamber is provided with a communication port, and a lower edge of the upper communicating portion of the partition wall defining the compartment chamber provided with the communication port is lower than a lower edge of the upper communicating portion of another one of the partition walls.
Abstract:
A water outlet structure of an internal combustion engine includes a water outlet and a thermostat. The water outlet includes a cooling-water inflow portion, a radiator outflow passage, and a bypass passage. The cooling-water inflow portion is provided to face a cooling-water outlet of a cylinder head. Cooling water is to flow out to a radiator through the radiator outflow passage. The radiator outflow passage linearly extends from the cooling-water inflow portion. The bypass passage linearly and obliquely extends from the cooling-water inflow portion to provide a water flow at an acute angle to a water flow in the radiator outflow passage. The thermostat is provided integrally with the water outlet and includes a thermo housing provided downstream of the bypass passage.