In a cooling device for cooling charge air from a compressor (3) in an engine (9) and hydraulic oil from a retarder (14), a first coolant flow (m1) is provided in a coolant conduit (20). The engine (9) is cooled by the whole first coolant flow (m1). The co...

In a cooling water passage structure for a water-cooled type internal combustion engine, to ensure that the flow of cooling water in a hot water riser passage extending from a thermostat valve toward a carburetor can be assuredly caused and stopped without...