JPS6432426U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a schematic diagram of a conventional supercharged internal combustion engine. 1...Engine, 2...Exhaust pipe line, 3...Turbine, 4...Compressor, 5...Suction side pipe line,
6... Discharge side pipe line, 7... Exhaust pipe line, 8... Bypass pipe line for swirl formation, 9... Switching valve, 10...
...Switching valve control means.

Claims (1)

[Scope of utility model registration request] In an internal combustion engine with a supercharger, in which a turbine is driven by engine exhaust gas, and air is supercharged to the engine by a compressor installed coaxially with the turbine, the suction side pipe of the compressor is A bypass pipe line that is branched and rejoins the suction side pipe line at a position close to the compressor blade of the compressor, the bypass pipe line being for forming a swirl that rotates the compressor blade in the supercharging direction toward the compressor blade. a swirl-forming bypass conduit in which a nozzle is formed, and a first air supply that is disposed at a branch point between the swirl-forming bypass conduit and the suction-side conduit and passes through the suction-side conduit. a switching valve for opening either one of the air supply route and a second air supply route passing through the swirl forming bypass pipe, and the second air supply route when the engine is started or operated at low load. open the
A supercharged internal combustion engine comprising switching valve control means for controlling the switching valve to open the first air supply path during operations other than the start or low load operation.