Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1996-12-12
1999-08-24
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
285226, 285299, F02B 3702
Patent
active
059410728
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a turbocharged combustion engine comprising a cylinder block which is provided with an inlet manifold having an inlet, an exhaust manifold having an outlet and a compressor unit made up of a turbine portion and a compressor portion, which compressor unit presents a turbine inlet communicating with the outlet of the exhaust manifold and a turbine outlet communicating with the inlet of the inlet manifold.
BACKGROUND OF THE INVENTION
Combustion engines of the above-mentioned type known to date have compressor units rigidly mounted directly to the connecting flange of the exhaust manifold around the exhaust outlet so that differences in thermal expansion between the exhaust manifold and the cylinder block which creates relative displacement between the compressor unit and the cylinder block has no effect on the mounting of the compressor unit. The relative displacement between the compressor outlet and the inlet of the inlet manifold is compensated for by means of a flexible conduit between said outlet and inlet. A limitation of the known embodiment is that a possibly desirable connection between the compressor unit and a drive or driving arrangement rigidly associated with the cylinder block requires the use of universal joints or similar to compensate for the above-mentioned relative displacement.
SUMMARY OF THE INVENTION
The object of the present invention is generally to provide a combustion engine of the above-mentioned type in which the compressor unit is so arranged that a connection between the compressor unit and a drive or driving arrangement associated therewith which is rigidly connected to the cylinder block can be maintained without the need for universal joints or the like. More particularly, the object is to provide a combustion engine with a compressor installation which allows driving of the compressor unit from the cam shaft of the engine using an intermediate transmission rigidly bolted to the flywheel casing of the engine for gearing adjustment of the rotation speed of the compressor unit relative to the speed of rotation of the cam shaft.
This is achieved according to the invention by means of the compressor unit being rigidly affixed to the cylinder block and its turbine inlet communicating with the outlet of the exhaust manifold via a conduit which permits certain relative displacement between the compressor and the exhaust manifold.
In a preferred embodiment of the invention, the outlet of the exhaust manifold and the turbine inlet of the compressor unit communicate with each other via a folded metal tube, the ends of which are each provided with a sealing lip, with each lip abutting a respective ring-shaped surface on facing flanges around the outlet of the exhaust manifold and the turbine inlet of the compressor unit respectively. The one ring-shaped surface hereby forms the base of a depression which accommodates a portion of the folded tube and locates it in a transverse direction.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in greater detail by way of example and with reference to the attached drawings in which
FIGS. 1 and 2 show a schematic elevational view and a half front view respectively of an engine according to the invention,
FIG. 3 shows a partial sectional view of an embodiment of the connection between the exhaust manifold of the engine and the compressor unit, and
FIG. 4 shows a partial sectional elevational view of a transmission integrally constructed with the compressor unit.
DETAILED DESCRIPTION OF THE INVENTION
In FIGS. 1 and 2, reference numeral 1 denotes a multicylinder diesel engine having a compressor unit generally denoted by 2 having a turbine portion 3 and a compressor portion 4. The compressor unit 2 is rigidly supported by a bracket 6 bolted to the cylinder block 5 and has its turbine inlet 7 (FIG. 3) connected to the exhaust manifold 8 of the engine via a flexible connection 9 which will be described in greater detail with reference to FIG. 3 and which permits certa
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patent: 1921907 (1933-08-01), Buchi
patent: 2305809 (1942-12-01), Maisch
patent: 3692337 (1972-09-01), Mischel
patent: 3739572 (1973-06-01), Duerr
patent: 4372120 (1983-02-01), Ford et al.
patent: 4559783 (1985-12-01), Ampferer
patent: 4697423 (1987-10-01), Conrad et al.
Arnell Jan
Dahlgren Magnus
AB Volvo
Koczo Michael
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