US 5,535,710 AGranted

Arrangement of valves and valve drives in an internal combuston engine having an overhead camshaft

AssigneeFEV Motorentechnik GmbH & Co. Kommanditgesellschaft

InventorsArmin Zoschke, Manfred Arnold, Franz Fischinger

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Abstract

In an internal combustion engine there is provided a cylinder head; a plurality of cylinder head bolts for securing the cylinder head to a cylinder block; at least one engine cylinder; at least two intake valves and two exhaust valves controlling the flow of gases into and from the engine cylinder. A plane defined by the intake valves and a plane defined by the exhaust valves extend at an angle of between 0.degree. and 15.degree. to one another and have an inclined orientation to the longitudinal engine axis. An overhead camshaft extends parallel to the engine axis and is situated in a zone bounded by the cylinder head bolts. Respective valve bridges interconnect the intake valves with one another and the exhaust valves with one another, and rocker arms connect respective cams of the camshaft with the valve bridges, whereby the intake valves are simultaneously operated by one cam and the exhaust valves are simultaneously operated by another cam.

Claims11

Dependent claims

An internal combustion engine having a longitudinal engine axis and comprising

(a) a cylinder head;
(b) a plurality of cylinder head bolts for securing the cylinder head to a cylinder block;
(c) at least one engine cylinder;
(d) at least two intake valves controlling the flow of intake gases into said engine cylinder;
said intake valves having respective longitudinal axes defining a first plane;
(e) at least two exhaust valves controlling the flow of exhaust gases from said engine cylinder;
said exhaust valves having respective longitudinal axes defining a second plane;
said first and second planes extending at an angle of between 0.degree. and 15.degree. to one another and having an inclined orientation to said longitudinal engine axis;
(f) an overhead camshaft extending parallel to said longitudinal engine axis and being supported by said cylinder head;
said camshaft being situated in a zone bounded by said cylinder head bolts;
said camshaft having a longitudinal axis and first and second axially spaced cams;
(g) first and second movable valve bridges respectively interconnecting said intake valves with one another and said exhaust valves with one another;
(h) first support means for positioning said first and second movable valve bridges on said cylinder head;
(i) first and second rocker arms connecting said first cam with said first movable valve bridge and said second cam with said second movable valve bridge, respectively, whereby said intake valves are simultaneously operated by said first cam and said exhaust valves are simultaneously operated by said second cam;
(j) second support means for positioning said first and second rocker arms on said cylinder head;
(k) a bearing supporting said camshaft;
and
(l) a bearing cap secured to said cylinder head and having an opening for one of said cylinder head bolts.

15 more elements

Dependencies are inferred from the claim text.