초록 ▼

A two-stage exhaust-driven supercharger aggregate is disclosed which comprises a low-pressure supercharger and a high-pressure supercharger. Each of the two superchargers is provided with a compressor driven by a respective turbine. Each of these superchargers is arranged on a separate shaft. In ord

A two-stage exhaust-driven supercharger aggregate is disclosed which comprises a low-pressure supercharger and a high-pressure supercharger. Each of the two superchargers is provided with a compressor driven by a respective turbine. Each of these superchargers is arranged on a separate shaft. In order to provide sufficient space for auxiliary components such as supercharger-air coolers, a bypass system and the like, and to obtain one compact structural unit, the pressure ratio of the low-pressure compressor is made greater than the pressure ratio of the high-pressure compressor by at least 40%. In this way, the geometrical exterior dimensions of the high-pressure supercharger becomes substantially smaller than the dimensions of the low-pressure supercharger. The shaft of the high-pressure supercharger is arranged such that it is parallel to, and offset laterally relative to the shaft of the low-pressure supercharger. Due to the smaller size of the high-pressure supercharger at least a portion of the auxiliary components are arranged in a radial direction next to the high-pressure supercharger without extending beyond an enveloping profile of the low-pressure supercharger. By the present invention, a very compact exhaust-driven supercharger aggregate is formed.

대표청구항 ▼

A supercharger for an internal combustion engine comprising: a high-pressure compressor and turbine arranged on a first axis, the high-pressure turbine being directly driven by exhaust gas from an internal combustion engine; a low-pressure compressor and turbine arranged on a second axis, the low-pr

A supercharger for an internal combustion engine comprising: a high-pressure compressor and turbine arranged on a first axis, the high-pressure turbine being directly driven by exhaust gas from an internal combustion engine; a low-pressure compressor and turbine arranged on a second axis, the low-pressure turbine being driven by exhaust from the high-pressure turbine; the low-pressure compressor and turbine has greater exterior dimensions than the high-pressure compressor and turbine; and the first axis being arranged radially offset from the second axis such that the exterior dimensions of the high-pressure compressor and turbine will be substantially within an extension of the exterior dimensions of the low-pressure compressor and turbine.