Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Ing. H.c.f. Porsche Ag

Winfried Distelrath

Hans-Joachim Esch

Manfred Batzill

Roland-Dieter Zebli

Hans Mezger

Albrecht Reustle

Roland Hauf

Gerhard Koller

Kurt Trieb

An opposed-cylinder internal-combustion engine, includes a cylinder block and crankcase which is longitudinally divided in the center of the crankshaft bearing. A bearing support is connected with the crankcase by way of cylinder head bolts. The cylinder block and crankcase has a joint vertical junction plane with the bearing support. Both bearing support halves are, on the one hand, connected with one another by way of bearing block screws and, on the other hand, the bearing support is held by way lo of cylinder head bolts between the crankcase halves arranged at both sides of the bearing support while forming oil ducts. At the same time, cylinder heads can be fastened on the crankcase by way of the screws.

Internal combustion engine

For avoiding exterior, cooling-water-carrying ducts, an internal-combustion engine comprising two mutually opposite cylinder banks has integrated ducts for the feeding and removal of the cooling water to the cooling jackets and the cylinder heads.

Internal-combustion engine comprising two cylinder banks

An internal-combustion engine which has an intermediate shaft extending in parallel to the crankshaft, comprises a basin which is arranged between the shafts and which guides lubricating oil released by the crankshaft drive into an oil sump. This basin has struts which project downwardly away and which surround the intermediate shaft in such a manner that it is secured against the admission of lubricating oil of the crankshaft drive. As a result, this lubricating oil arrives in an oil tank in a largely unfoamed state.

Arrangement for guiding lubricating oil in an internal-combustion engine

A cylinder head is composed of a basic housing resting on a cylinder block, said housing having gas exchange channels and valves, a bearing housing supporting camshafts and cup tappets, and a cylinder head cover. This cover is made integral with the upper parts of the camshaft bearings. The arrangement has a single separating plane, at which both the basic housing with elevated outside walls and the bearing housing and the cylinder head cover abut. This arrangement has high rigidity and is easy to assemble.

Cylinder head arrangement of an internal-combustion engine

An internal combustion engine with two rows of cylinders with a V-angle of 180 degrees has a crankshaft provided with a flywheel, said crankshaft having a drive for a parallel intermediate shaft adjacent to the flywheel. One camshaft of each row of cylinders is driven respectively from the two ends of this intermediate shaft. The arrangement of the drive for the intermediate shaft near the flywheel avoids the transmission of rotary oscillations from the crankshaft to the intermediate shaft.

Internal-Combustion engine with two rows of cylinders

A crankshaft for an internal-combustion engine has crankshaft webs provided with recesses. The recesses are molded into the crankshaft webs in each case symmetrically with respect to a vertical longitudinal center plane oppositely within a clear outer contour of the crankshaft webs. In the area of the recesses, the sections are constructed as a U-shaped profile with side legs. Between the recesses of the crankshaft webs arranged above one another, a reinforcing rib is arranged in the overlapping area of the crank pin and the journal. As a result of the recesses in each crankshaft web which are arranged in a targeted manner, a reduction in weight is made possible with effective mass compensation. The recesses are arranged above one another such that in the endangered area of each crankshaft web, a cross-section is built up that is as large as possible and can absorb the flexural and torsional load in a defined manner, despite the maximally large recesses.

Crankshaft for an internal-combustion engine

An intake duct in a cylinder head of an internal-combustion engine has a defined flow profile by which the flow rate of the gas flow is accelerated continuously, specifically up to a first intake duct segment of the intake duct which, as viewed in the flow direction, is situated in front of the valve stem. Subsequently, in a second intake duct segment, the flow rate of the gas flow is reduced continuously, whereby a lower approach flow rate of the valve is achieved. This results in an optimized volumetric efficiency which has a favorable influence on the performance and consumption of the internal-combustion engine.

Intake duct

A flow duct, particularly an intake duct in an intake system and a cylinder head of an internal-combustion engine has a defined flow profile by means of which the flow rate of the gas flow is accelerated continuously, specifically until it reaches a cross-sectional transition area of the intake duct which--viewed in the flow direction--is situated upstream of a valve stem. After that, the flow rate of the gas flow is reduced whereby a lower approach flow speed of the valve is achieved. This causes an optimized volumetric efficiency which has a favorable effect on the power and the consumption of the internal-combustion engine.

Flow duct for an internal combustion engine

A suction installation for a multi-cylinder internal combustion engine which includes a vessel-like manifold device from which suction pipes extend toward a cylinder head of the internal combustion engine. The shape of the entire manifold device corresponds to a sphere whereby the suction pipes are aligned toward the center of the sphere; the air is conducted to the cylinders of the internal combustion engine from the interior space of the sphere.

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Stuttgart, Germany

Winfried Distelrath