最終更新日：2025/12/06
(rail transport, mechanical engineering) A device that retains some air pressure in a train's air brake cylinders even when the automatic brake valve is set to the fully-released position, used on steep downgrades to allow a degree of continuous braking effort to be maintained without depleting the pressure in the train's brakepipe (which would result in the loss of nearly all braking ability, causing a runaway).
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retaining valve
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元となった辞書の項目
retaining valve
名詞
(rail
transport,
mechanical
engineering)
A
device
that
retains
some
air
pressure
in
a
train's
air
brake
cylinders
even
when
the
automatic
brake
valve
is
set
to
the
fully-released
position,
used
on
steep
downgrades
to
allow
a
degree
of
continuous
braking
effort
to
be
maintained
without
depleting
the
pressure
in
the
train's
brakepipe
(which
would
result
in
the
loss
of
nearly
all
braking
ability,
causing
a
runaway).
日本語の意味
鉄道や機械工学の分野で用いられる装置で、列車の空気ブレーキシリンダ内の空気圧を、自動ブレーキ弁が完全に解放位置になった場合でも一定量保持し、特に急勾配走行時において、ブレーキ管の圧力を極端に低下させず、連続的なブレーキ操作を可能にする役割を果たす装置
意味（1）
(rail
transport,
mechanical
engineering)
A
device
that
retains
some
air
pressure
in
a
train's
air
brake
cylinders
even
when
the
automatic
brake
valve
is
set
to
the
fully-released
position,
used
on
steep
downgrades
to
allow
a
degree
of
continuous
braking
effort
to
be
maintained
without
depleting
the
pressure
in
the
train's
brakepipe
(which
would
result
in
the
loss
of
nearly
all
braking
ability,
causing
a
runaway).
（ plural ）
