Patent ID: 9217394
Filing Date: 2015-12-22
Classification: F02B,F02C,F02M,Y02T

Abstract:
1. A multi-stage supercharging apparatus comprising: a first supercharger and a second supercharger which are driven by an exhaust gas of an engine; and an exhaust gas manifold entirely upstream of the first supercharger; the first supercharger including the second supercharger including the second supercharger is supported by the first supercharger by placing an opening of the second exhaust inlet of the second supercharger on an opening of the first exhaust outlet of the first supercharger; a first flange at the opening of the first exhaust outlet of the first supercharger and having a surface, a second flange at the opening of the second exhaust inlet of the second supercharger and having a surface, the surfaces of the first flange of the first supercharger and the second flange of the second supercharger are horizontally and directly connected to each other, a by-pass channel integrally formed in the first supercharger, detouring around the first turbine accommodating section of the first supercharger and communicating the first exhaust inlet of the first supercharger with the second exhaust inlet of the second turbocharger; a downstream end of the by-pass channel is provided at the same flange surface as the first flange of the first supercharger, wherein the by-pass channel is separated from the first exhaust outlet of the first supercharger until a position of the surface of the first flange of the first supercharger in a direction of the exhaust gas flow; and a flow rate adjusting valve which adjusts a flow rate of the exhaust gas in the by-pass channel and which is provided at the downstream end of the by-pass channel.