Last Updated：2025/11/23
(automotive) A type of internal combustion engine design which has the inlet and exhaust valves in the cylinder head (and therefore above the piston). The camshaft can be beside the pistons (with pushrods and rockers operating the valves) or above the valves, with the latter usually referred to as overhead cam.
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overhead valve
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Source Word
overhead valve
Noun
(automotive)
A
type
of
internal
combustion
engine
design
which
has
the
inlet
and
exhaust
valves
in
the
cylinder
head
(and
therefore
above
the
piston).
The
camshaft
can
be
beside
the
pistons
(with
pushrods
and
rockers
operating
the
valves)
or
above
the
valves,
with
the
latter
usually
referred
to
as
overhead
cam.
Japanese Meaning
シリンダーヘッド内に吸気弁と排気弁を配置した内燃機関の設計方式（ピストン上部にバルブが位置する構造）
Sense（1）
(automotive)
A
type
of
internal
combustion
engine
design
which
has
the
inlet
and
exhaust
valves
in
the
cylinder
head
(and
therefore
above
the
piston).
The
camshaft
can
be
beside
the
pistons
(with
pushrods
and
rockers
operating
the
valves)
or
above
the
valves,
with
the
latter
usually
referred
to
as
overhead
cam.
（ plural ）
