Cylinder head for an internal-combustion engine
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsHans-Joachim Esch, Willi Schultz
Life of this patent
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Abstract
A cylinder head of an internal-combustion engine has three intake valves on one side of a longitudinal center plane and has two exhaust valves on the other side. The intake valves are arranged in a circumferential direction of a cylinder of the internal-combustion engine, and a first intake valve arranged close to the edge of a combustion chamber is permanently driven by a camshaft by means of a space-saving actuating lever. The other intake valves are connected successively or isochronously according to the requirements. When the load is low, a fuel-saying load movement is achieved by the tangential inflow through the first intake valve, while, when the load requirements are higher, an optimized mixture flow rate is possible via the connected valves.
Claims16
A cylinder head for an internal-combustion engine comprising:
- a first group of charge cycle valves arranged on one side of a cylinder head longitudinal center plane;
- said first group of charge cycle valves being spaced from one another along a circumferential direction about a central axis of an engine cylinder when the cylinder head is in an operative position on an engine;
- a first camshaft for actuating the first group of charge valves;
- an operating lever operatively connected to the first camshaft for continuously acting on one charge valve of the first group, remaining charge valves of the first group being selectively actuated by the first camshaft;
- wherein said one charge valve continuously acted on by the operating lever is first in said circumferential direction;
- a second group of charge cycle valves arranged on an opposite side of the longitudinal center plane with respect to the first group;
- a second camshaft for actuating the second group of charge valves;
- and
- wherein all other charge cycle valves are actuated by the camshafts by means of bucket tappets.
Dependencies are inferred from the claim text.