| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake structure of an on-vehicle engine which can suppress a rise of an intake air temperature.SOLUTION: In an intake system of an engine 1, there are arranged a first intake duct 2 having an outside air introduction port 2a opened to the outside of a vehicle, and a second intake duct 3 having a second intake port 3a opened inside an engine compartment. Portions of the first intake duct 2 and the second intake duct 3 which are vertically aligned are partially overlapped on each other in the vertical direction. By this constitution, it is inhibited that air is sucked into the engine 1 from the second intake port 3a of the second intake duct 3 by a flow of air from the first intake duct 2. Accordingly, it is suppressed that high-temperature air inside the engine compartment is sucked into the engine 1 via the second intake port 3a, while effectively sucking air (outside air) at the outside of the vehicle which is low in temperature into the engine 1 from the outside air introduction port 2a. As a result, a rise of an intake air temperature of the engine 1 is suppressed. |
