Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1992-01-31
1995-08-15
Koczo, Micahel
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
606051, F02B 3702
Patent
active
054408814
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to an intake system for internal-combustion engines supercharged in one or two stages in which taken-in combustion air, is led from the compressors of the exhaust gas turbochargers through interposed charge air coolers to an air collecting housing of the internal-combustion engine and finally from there to the inlet ducts of the cylinder heads of the internal-combustion engine.
An intake system of this general type is known from the German Patent Document DE-OS 20 59 220. In the case of this internal-combustion engine with a V-shaped arrangement of the cylinders in two banks, an exhaust gas turbocharger is assigned to each cylinder bank for the one-stage charging. The combustion air, which is compressed by the compressors, arrives in collecting pipes extending along the internal-combustion engine in which the charge air coolers are integrated. By means of a series connection of several block-shaped heat exchanger elements, a low overall height of the collecting pipes is achieved. It is not indicated, however, how a space-saving arrangement of an intake system is to be designed with exhaust gas turbochargers, charge air coolers and collecting housings at constructional expenditures that are as low as possible when the internal-combustion engine is to be changed into an internal-combustion engine which is supercharged in two stages.
The instant invention is based on the object of providing an intake system which, while only a few different components are used, can be used for a one-stage as well as for a two-stage supercharging, and as a result offers logistical advantages, which, in addition, makes it possible to render the dimensions of the engine variants and the mounting of the intake systems largely uniform, and which is also favorable with respect to air flow guiding.
This object is achieved in the case of a construction of the intake system for use in one-stage or two-stage supercharging, of having at least one exhaust gas turbocharger, one charge air cooler and one air collecting housing, with connecting pipes therebetween and to the inlet ducts of the cylinder heads. Accordingly, the exhaust gas turbochargers, the charge air coolers and the air collecting housings as well as the pipes to the inlet ducts of the cylinder heads are used in the same arrangement in one-stage supercharging as in two-stage supercharging. Naturally, in the case of a two-stage supercharging, a low-pressure charge air cooler must be added. Instead of the charge air cooler used in the case of the one-stage supercharging, a high-pressure charge air cooler is provided. And instead of the exhaust gas turbochargers used in a one-stage supercharging, high-pressure exhaust gas turbochargers are provided. In one-stage supercharging, the flow housing forms an intake housing with an intake funnel, and in the two-stage supercharging, the flow housing encloses the cooling element of the low-pressure charge air cooler. Both flow housings are constructed with an identical bottom part which is arranged at the same point on the engine in one-stage and in two-stage supercharging. This standardization leads to logistical advantages with a corresponding cost reduction. The assembly is simplified and the space requirement is similar in the case of the one-stage and two-stage supercharging. The intake system is also favorable with respect to air flow guiding. A particularly low space requirement and an optimal flow guidance with a good distribution of the flow to the cylinders is obtained if the air collecting housing extends between cylinder banks arranged in a V-shape along the internal-combustion engine and if system parts can be arranged on the top side of the air collecting housing. In one-stage supercharging, an intake funnel and a charge air cooler are arranged next to one another on the air collecting housing. In two-stage supercharging, a high-pressure charge air cooler and a low-pressure charge air cooler are arranged next to one another on the air collecting housing. Having
REFERENCES:
patent: 2739440 (1956-03-01), Seifert
patent: 3027706 (1962-04-01), Sprick
patent: 4458491 (1984-07-01), Deutschmann
Schier Karl
Sudmanns Hans
Koczo Micahel
MTU Motor- und Turbinen-Union Friedrichshafen
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