The invention relates to an internal combustion engine with a 2-stage exhaust gas turbo loader and with a supercharger intercooler in the connection conduit between the compressor of the low pressure stage and the compressor of the high pressure stage.
An internal combustion engine with such features is known, for example, from DE 19961610 A1. With regard to this disclosure, a supercharger intercooler is, in fact, provided between the compressor of the low pressure stage and that of the high pressure stage; however, it remains open how this supercharger intercooler is configured.
It is therefore the object of this invention to provide a supercharger intercooler that takes into account the space-constrained relationships in the internal combustion engine between the low pressure- and high pressure-compressors.
This object is solved for an internal combustion machine of the state of the art having, in accordance with the invention, by a supercharger intercooler having the characteristics as set forth in claim 1.
Advantageous embodiments of the inventive solution are characterized in the dependent claims.
The inventive supercharger intercooler is characterized via extremely small but nonetheless effective configurations. In view of the fact that the cooling unit can be built in in the manner of a cartridge in a specially configured section of the connection conduit between the ATL-low pressure compressor and the ATL-high pressure compressor and this section of the connection conduit forms the outer wall of the supercharger intercooler, a simple manufacturing of this component is, on the one hand, possible and, on the other hand, a simple mounting of this same component between the pair of ATL-stages is possible. A sufficiently large cooling effect is thus achieved, because the cooling pipes are provided exteriorly with a plurality of cooling ribs that operate to effect a corresponding heat exchange.
The inventive supercharger intercooler is described in more detail hereinafter with reference to an embodiment illustrated in the drawings. The drawings show:
In
In accordance with the invention, the supercharger intercooler 14 is configured—see
As can be well seen in
The connection conduit 13 is comprised, in each section 16 forming the supercharger intercooler 14, of a substantially straight cooling pipe section 16 and two elbows 30, 31 each on a respective end region of the straight cooling pipe section and laterally deviating therefrom before the axial ends 28, 29 thereof. In this manner, the cooling unit 15, which is configured in the manner of a cartridge, is disposable during its final assembly through an open end 28 of the straight section 16 of the connection conduit 13 into the interior volume of the connection conduit, whereby the cooling unit is, via the sealing tubes 25 on the cooling pipes 19, 20, 21, inserted in a sealing manner into retaining bores 32 formed in the axial ends 29 of the section 16 that are oppositely disposed to the cooling pipes and, thereafter, is, via several bolts 33, secured with its base plate 18 on an axial end 28 in a leak-free manner. Thereafter, the straight section 16 of the connection conduit 13 is closed on its ends 29 neighboring the sealing tubes 25 via a securable cover 34 disposed thereat. This cover 34 comprises, internally, a distribution channel 36 that can be supplied from the exterior—see arrow 35—with cooling medium, the distribution channel being communicated with a portion of the cooling pipes—namely, the cooling pipes 20, 21. Furthermore, the cover 34 comprises, internally, a return flow channel 38 connected with an external cooling medium return conduit—designated via arrow 37, the other one remaining cooling pipe or the other remaining cooling pipes—here, namely, the one remaining cooling pipe 19—communicating with the return flow channel.
In the illustrated example, the inventive cooling unit 15 comprises three cooling pipes 19, 20, 21 arranged in a plane in parallel neighboring relationship to one another with limited spacing from one another and having the same length and configuration—see
With its wall 17, the connection conduit 13 encloses within its straight channel section 16 the built in cooling unit 15 at a predetermined, not large spacing therefrom that is smaller than the outer diameter of the cooling pipes 19, 20, 21.
Via this inventive supercharger intercooler 14, an adequate cooling effect is achieved, despite the very small size of the supercharger intercooler, by virtue of the intensive flow through the cooling pipes 19, 20, 21 of the cooling medium and the inner contact of the charge air, which flows through the cooling unit 15 in the connection channel-section 16, with the cooling ribs of the cooling pipes 19, 20, 21.
Number | Date | Country | Kind |
---|---|---|---|
102 23 080.3 | Mar 2002 | DE | national |
A1238/2003 | Aug 2003 | AT | national |