PGS. TS. ĐỖ VĂN DŨNG
235
Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
Nn

N (gear selector) = NEUTRAL: Số
N trong dãy số của hộp số tự
động
nail punch n. = DRIFT PUNCH: Kìm
nhổ đinh
natural frequency n. frequency at
which an object, circuit or system
oscillates or vibrates when set in
free vibration: Tần số dao động
tự do
 natural gas n. alternative,
environmentally friendly fuel
(mainly methane) which can be
stored under pressure in the boot
as compressed natural gas (CNG):
Khí đốt thiên nhiên
 naturally aspirated engine n.
conventional engine that takes in
air at normal pressure, i. e. not
turbocharged or supercharged:
Động cơ không tăng áp
(NOTE: opposite is forced-
induction engine)
 natural oxide film or skin n.
transparent film which forms
naturally on an aluminium surface

khí thải bằng tia hồng ngoại.
NDT method n. non-destructive
testing method, such as ultrasonic
testing, X-ray testing, dye-
penetrant testing: Phương pháp
nghiên cứu không phá hủy như
dùng siêu âm, X-quang…
nearside (n/s) n. the side of a
vehicle nearest the kerb (when
driving): Phía xe gần sát với lề
đường.
necking n. when ductile test
specimens are subjected to a
tensile test, they exhibit necking
when the tensile force exceeds the
yield strength of the material;
necking results in a reduction of
area, measured in percent after
break of the specimen: Phần thắt
lại của vật mẫu khi thử sức căng
N

necking

PGS. TS. ĐỖ VĂN DŨNG
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Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
needle n. (a) indicator or pointer on
an instrument or gauge: Kim chỉ
báo, kim đồng hồ

trục bánh xe hướng về trước
(góc castor âm)
 negative electrode n. =
NEGATIVE PLATE: Bản cực
âm (ắc quy)
 negative plate n. during
battery discharge, the grey plate
which acts as anode: Bản cực âm
(bình ắc-quy)
(NOTE: opposite is positive
plate)
 negative spark n. a spark that
jumps from the negative centre
electrode to the positive earth
electrode of the sparking plug,
allowing a reduction in the high
voltage require: Tia lửa điện
phóng từ điện cực giữa của
bougie với điện thế âm sang
điện cực bìa với điện thế dương.
 negative suction head n. =
SUCTION LIFT: Chiều cao cột
hút âm
 negative terminal n. black
battery terminal with a minus
symbol indicating negative
polarity: Cọc âm
 negative transducer EGR
valve n. valve used on engines
with a relatively low back

free-energy change of the overall
reaction: Công thức Nernst tính
sức điện động của pin khô
neutral 1 a. (a) not having any
marked characteristics: Không có
đặc điểm rõ rệt.
 neutral handling = having
neither oversteer nor understeer:
Bẻ lái không dư cũng không
thiếu
(b) having a pH of 7, i. e. neither
alkaline nor acid: Trung tính
(hoá)
2 n. position of the gearbox in
which no gear is engaged;
indicated by the letter N on
automatic gear selectors: Tay số
N (số mo)
new-old-stock (NOS) part n. new
genuine spares for older models,
referring mostly to spare parts that
are normally no longer produced:
Phụ tùng mới cho các xe đời cũ
không còn sản xuất.
NiCaSil n. nickel-silicon plating used
e. g. on the cylinder walls of
certain light-weight high-
performance engines; reduces
weight and friction and improves
heat transfer: Lớp mạ nickel-

gold, silver, mercury, platinum)
which conducts electricity very
well, resists corrosion and is inert;
some are used as catalysts in
catalytic converters: Kim loại quý
no-claims bonus n. reduction in
insurance premiums because no
claims have been made: Tiền
thưởng (giảm tiền bảo hiểm)
nhờ lái xe an toàn
noise cancellation or reduction n. the
reduction of noise by means of
anti-noise loudspeakers: Khử
tiếng ồn
Nernst equation

noise cancellation

PGS. TS. ĐỖ VĂN DŨNG
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Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
 noise cancellation system
(NCS) = ANTI-NOISE SYSTEM:
Hệ thống khử tiếng ồn
nominal capacity n. = RATED
CAPACITY: Dung lượng đònh
mức
 nominal diameter n.
characteristic value used for
pipeline systems to identify parts

 non-ferrous metal n. metal that
is not based on iron; includes
aluminium, copper, magnesium,
etc.: Kim loại màu
non-self-priming pump n. a
centrifugal pump which is unable
to evacuate and prime the suction
line without external assistance:
Bơm ly tâm không tự mồi
(NOTE: opposite is self-priming
pump)
non-servo brake n. drum brake
design; each brake shoe is
anchored, therefore no one shoe
can assist in the application of the
other; one shoe is self-energizing,
the other is not: Phanh không trợ
lực
Nordberg key n. round key: Chìa
khóa tròn
Nordic Anti-Corrosion Code n. (for
passenger cars) code developed
by the Scandinavian automobile
and consumer associations which
stipulates that, as of January 1983,
all cars must be free of surface
corrosion for three years and free
of perforation and weakening
damage for six years: Luật bảo
vệ người tiêu dùng ở một số

rush-hour traffic; bumper-to-
bumper: Xe chạy nối đuôi nhau
 nose-up a. description of the
towing vehicle if the vehicle being
towed is too heavy: Tình trạng
của xe kéo nếu xe được kéo quá
nặng
 nose dive n. = BRAKE DIVE:
Phanh bò đâm
 nosepiece n. insert for pop-rivet
pliers that is used to allow various
pop-rivet diameters to be used:
Đầu nạp đi vê
nose protector n.cover, usually of
black soft plastic sheeting with
flannel-like backing, that fits
around the front end of a car: Vật
bảo vệ mũi xe bằng chất dẻo
(NOTE: also called nose bra)
nose weight n. vertical weight on the
centre of the towing ball exerted
by the vehicle being towed (on
level ground): Trọng lượng đứng
ở tâm móc kéo khi kéo xe
no-spin differential n. = LIMITED-
SLIP DIFFERENTIAL: Bộ
truyền động vi sai giới hạn trượt
notchy a. (changing of gears) not
smooth, causing a slight crashing
of gears; often caused by the

ký (bảng số xe ô tô)
(NOTE: US English is license
plate)
 numberplate lamp = lamp
providing white illumination of
the rear numberplate: Đèn bảng
số
nut n. small, metal block with a
threaded central hole so that it can
be screwed on to a bolt, screw,
etc.: Đai ốc
NOS

nut
PGS. TS. ĐỖ VĂN DŨNG
240
Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
 nut cracker or splitter = tool
used to crack open stubborn nuts
without damaging the bolt or stud
thread: Dụng cụ đục đai ốc (khi
mở khó)
 nut driver or spinner =
SOCKET DRIVER: Cần siết nụ
 nut starter = tool used to hold
nuts for easy placement in tight
locations: Dụng cụ giữ đai ốc khi
siết những chỗ hẹp
 nut thread = internal thread of
a nut: Đường ren bên trong của

ocean liner blast horn n. horn which
imitates the deep bellow of an
ocean liner horn: Còi xe bắt
chước tiếng còi hơi của tàu biển
octagonal (head) bolt n. bolt with
an eight-sided head: Bu-lông đầu
bát giác
 octagon nut n. nut with
eight-sided: Đai ốc bát giác
octane number (ON) or octane
rating n. the measure of a
fuel’s anti-knock rating; the
average of Research Octane
Number (RON) and Motor Octane
Number (MON): Chỉ số ôctan
OD = OVERDRIVE: Số cao nhất
trong hộp số tự động, số OD
OUTER DIAMETER: Đường kính
ngoài.
odometer n. incorporated in the
speedometer, the odometer
indicates total mileage of the
vehicle, in miles or kilometres,
either mechanically or
electronically: Đồng hồ đo
quãng đường đã đi của xe.
OE (M) = ORIGINAL EQUIPMENT
(MANUFACTURER): Thiết bò
chính hãng (nhà sản xuất)
offer up v. to bring a part close to or

có thể dương, âm hoặc bằng
không)
offset angle n. angle of the offset
crankpins in V-engines: Góc lệch
khuỷu (trong động cơ chữ V).
offset crankshaft n. crankshaft
layout whereby the axes of the
obstruction spanner

of
fset crankshaft
PGS. TS. ĐỖ VĂN DŨNG
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Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
crankshaft and the piston pin do
not intersect: Kiểu trục khuỷu
mà trên hình chiếu tâm của trục
khuỷu không cắt ắc piston.
offset handle n. drive handle for use
with sockets, with one end set at
90
o
to the handle: Tay quay dùng
cho tuýp có đầu lệch 90
o
.
 offset power steering n. =
LINKAGE POWER STEERING:
Lái có trợ lực liên kết bằng
thanh lái

động bánh xe ngoài xe
(NOTE: opposite is on-the-car
balancing)
off-the-dolly panel beating n.
metalworking technique used to
hammer out dents in the
bodywork: Gò không dùng đe
OHC = OVERHEAD CAMSHAFT:
Trục cam trên nắp máy
ohmmeter n. instrument designed for
measuring electric resistance:
Ôm kế
OHV-engine n. = OVERHEAD
VALVE ENGINE: Động cơ có
súpap trên nắp máy
oil n. the oil used to lubricate an
engine (engine oil) is refined
from crude oil and apart from
reducing friction and wear, cools
high-temperature parts like
bearings and piston rings (as well
as sealing the latter against blow-
by) and helps to keep engines
clean and free from corrosion
caused by combustion gases: Dầu
(nhớt) bôi trơn động cơ, nhớt
oil additive n. any one of a variety
of chemicals added to engine oils
to improve their performance:
Các chất phụ gia của dầu (nhớt)

oil circulation n. passing of oil
round the engine: Sự lưu thông
dầu (nhớt) trong động cơ
oil consumption n. amount of oil an
engine uses: Độï tiêu hao nhớt
trong động cơ
 oil control orifice valve n.
valve located in the feed line
between cylinder head: Van tiết
lưu dầu (nhớt).
 oil control ring = OIL
SCRAPER RING: Vòng găng
gạt dầu (nhớt) (xéc-măng dầu
(nhớt))
oil cooler n. small, air- or coolant-
cooler, radiator-like device
designed too decrease the
temperature of the oil in the
engine to approx 185
o
F: Bình
giải nhiệt dầu (nhớt) (bằng nước
hoặc gió)
 oil cooler bypass valve = oil-
temperature controlled valve
which closes the oil circuit thought
the oil is still cold; similar function
as the thermostat in the engine
cooling system: Van hằng nhiệt
trong bình (két) giải nhiệt dầu

a bypass filter with the filter
elementmade of pleated paper,
gauze, ceramic or fine wire mesh:
Bộ lọc dầu (nhớt)
 oil filter bypass valve = valve
in or near the oil filter which
routes the oil unfiltered directly to
the lubricating points; it comes
into operation when the oil filter is
clogged so that pressure across the
filter is higher than the pressure
needed to overcome the oil filter
oil can

oil filter bypass valve

PGS. TS. ĐỖ VĂN DŨNG
244
Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
bypass valve spring: Van an toàn
trong lọc dầu (nhớt)
 oil filter cartridge = (i) the
type of oil filter usually used on
automotive engines which comes
complete with filter and housing,
and where both components are
replaced together (ii) a paper or
textile insert for the oil filter
housing (quite commonly used on
motorcycle engines where e.g. the

transport lubricant: Rãnh dẫn dầu
(nhớt) để bôi trơn
 oil immersed clutch n. =
WET CLUTCH: Ly hợp ngâm
trong dầu (nhớt) (ly hợp ướt)
 oil level n. depth of oil in
sump, gearbox or rear axle: Mực
dầu (nhớt), mức dầu (nhớt)
 oil level gauge = dial on the
instrument panel that indicates the
oil level; operates when the
ignition is switched on and stops
shortly after the engine starts to
run: Đồng hồ báo mực dầu
 oil level sensor = sensor
mounted in the sump that supplies
information on the engine oil level
to the corresponding on the engine
oil level to the corresponding
gauge: Cảm biến mực dầu (nhớt)
 oil pan n. US = SUMP:
Máng dầu (nhớt)
 oil pick-up (pipe) n. pipe or
tube from the strainer to the oil
pump in the sump: (Ống dẫn) dầu
(nhớt) về các te tư ølọc
 oil pressure n. the lubrication
point of the engine will only be
lubricated sufficiently if, in
addition to the oil quantity

suất dầu (nhớt)
oil pump n. pump which circulates oil
under pressure to the moving parts
of an engine; normally bolted to
the crankcase and located in the
sump; usually a gear pump: Bơm
dầu (nhớt) bôi trơn
 oil pump strainer = coarse-
mesh metal screen on the bottom
of the pick-up pipe that prevents
foreign matter (such as lost
washers, nuts and bolts) from
entering the oil pump: Vỉ lọc dưới
bơm dầu (nhớt)
oil rail n. the part of the oil ring
responsible for the seal between
piston and cylinder wall and thus
for the actual ‘scraping off’ of the
oil: Gờ của bạc nhớt để gạt
nhớt.
oil scraper ring n. piston ring
whose primary function is to
control the amount of oil that
remains on the cylinder walls:
Xéc-măng dầu (nhớt)
oil screen n. = OIL PUMP
STRAINER: Lưới lọc dưới bơm
dầu (nhớt)
 oil seal n. any seal that
prevents the leakage of oil but

HYDROPNEUMATIC
SUSPENSION: Hệ thống treo
thuỷ khí
ON = OCTANE NUMBER: Chỉ số
ôctan
on-board computer n. electronic
component used to control vehicle
electrical circuits, etc. and to
process data for instrument panel
oil pressure switch

on
-
board computer

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gauges: Máy tính trung tâm
dùng để kiểm soát mạch điện và
xử lý số liệu cho tableau
 on-board diagnostic system n.
indicating devices on the car that
alert the driver when something is
wrong in the system: Hệ thống
chẩn đoán trên xe
one-coat finish n. finish consisting
of a single coat of paint: Lớp sơn
cuối (một lớp)
one-off n. a car or spare part of

on-line a. state in which a piece of
equipment or subsystem is directly
connected with or incorporated
into the main system: Sự nối trực
tiếp
 on-line painting = painting of
components within the actual
painting line: Sự sơn trên dây
chuyền
on-the-car balancing n. balancing the
wheel whilst it is still attached to
the car: Cân bằng bánh xe không
tháo bánh
(NOTE: opposite is off-the-car
balancing)
on-the-dolly panel beating n.
metalworking technique used to
tap out dents in the bodywork: Gò
khung dùng đe
on-the-road charges n. extra charges,
in addition to the list price of a
new car, to cover delivery,
numberplates and road fund
licence (tax disc): Phí lưu hành
opacimeter n. instrument for
measuring the content of
particulate suspended in a fluid:
Dụng cụ đo độ đục của chất lỏng
open coil or open element glow plug
n. = WIRE GLOW PLUG: Bougie

courtesy light mounted on the
central pillar: Đèn trang trí
operating costs n. the costs of running
a car: Chi phí vận hành
operating piston n. (automatic
gearbox) piston which cause its
respective clutch (es), band or
multi-disc brakes to be applied by
converting fluid pressure into
mechanical force and movement:
Piston trong mạch dầu thuỷ lực
(hộp số tự động)
opposite lock n. turning the steering
wheel in the opposite direction to
that of the oversteer; i.e. turning
the wheel to the left if the result
of going round a right-hand bend
too fast has caused the rear end of
the car to skid: Sự trượt đuôi xe
khi đánh vòng ngược tay lái
optical check n. either a (less
thorough) visual inspection or an
examination by means of optical
instruments: Kiểm tra chi tiết
bằng các thiết bò quang học.
optimize n. to set at the best possible
value: Tối ưu hoá.
optional equipment n. those parts
and systems of a vehicle which
are not supplied as standard

phân tử nhựa khi bò kéo.
original condition n. description of
the condition of a car; the car is in
the state in which it left the
factory; it may be worn but has
neither been resprayed nor
reupholstered nor has extensive
welding been carried out or
open
-
loop

original condition PGS. TS. ĐỖ VĂN DŨNG
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Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
modern accessories fitted to
change its standard specifications:
Tình trạng ban đầu (của xe).
original equipment (OE) n. part used
in the manufacture of the vehicle,
rather than those added
afterwards: Trang thiết bò gốc
(dùng ở nơi sản xuất xe)
O-ring n. annular seal, of round or
rectangular cross section and
almost any diameter; made of
rubber, neoprene, etc. , or of soft

cơ đốt trong)
outboard a. away from the centre
of the vehicle: Xa tâm xe
outdoor or outside temperature
gauge (otg) n. gauge which
indicates the ambient air
temperature outside the vehicle:
Dụng cụ đo nhiệt độ ngoài trời
 outer dead centre see
BOTTOM DEAD CENTRE:
Điểm chết dưới
 outer diameter (OD) n.
external diameter of a cylinder or
tube: Đường kính ngoài
 outer electrode n. (a) =
OUTER TERMINAL: Cực ngoài
(b) = EARTH ELECTRODE:
Điện cực bìa
 outer envelope n. (of gas
discharge lamps) bulb which
protects and supports the arc tube;
either filled with gas or evacuated
to avoid oxidation of the arc tube:
Vỏ bóng đèn nạp khí.
 outer headlight: Đèn pha phía
ngoài
 outer terminal n. electrode on
the inside of the distributor cap,
one outer terminal being assigned
to each sparking plug; the

pipe: Ống ra của bơm.
 outlet side = that side of the
pump or pumping system on which
the liquid pumped leaves the
pump or system: Bên xả
(NOTE: opposite is suction side)
 outlet valve n. (a) =
EXHAUST VALVE: Sú páp thải
(b) = DISCHARGE VALVE:
Van thoát
outline v. to mould plastic material
around something: Phủ nhựa
out of round a. not circular: Không
tròn
 out of true a. inaccurately
made or incorrectly adjusted, e.g.
of a wheel with side –to-side
deviation or wobble: Lắp sai,
chỉnh sai
 out of tune a. poorly tuned:
Hiệu chỉnh sai
output speed n. speed of the
transmission output shaft which is
transmitted to the driven wheels
via the final drive; as the final
drive provides a constant gear
ratio, output speed is proportional
to vehicle road speed: Tốc độ
trục ra của hộp số
outrigger n. a short angle or box

turns faster than the transmission
input shaft: Trục ra hộp số quay
nhanh hơn trục vào.
(b) separate transmission installed
in the (rear) drive train giving an
overdrive reduction to direct or
direct and intermediate gears;
usually selected electro-
outer wrap

overdrive
PGS. TS. ĐỖ VĂN DŨNG
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Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
mechanically by means of a
button or switch located either in
the instrument panel or at the gear
lever: Số OD
overflow hose/pipe n. pipe to drain
off excess fluid, e.g. between the
radiator and the coolant reserve
tank, or in the float chamber if the
specified fuel level is substantially
exceeded due to a leaking needle
valve: Ống thoát, ống xả, ống
tràn
overhang n. distance between the
outermost front or rear point of a
vehicle and the wheel centres of
the respective axle: Khoảng cách

overlap n. = VALVE OVERLAP:
Góc trùng điệp của sú páp.
overlay n. upper layer of a plain
bearing insert: Lớp vỏ ngoài của
ổ bi.
overload spring n. (chassis) spring
which acts only under heavy load;
prevents bottoming: Lò xo chòu
tải
overrev v. to run engine above the
maximum recommended rpm:
Chạy quá vòng quay tối đa cho
phép (động cơ)
overrun (a) n.& v. a vehicle travelling
with no throttle and the engine
acting as a brake is said to be ‘on
the overrun’ or ‘overrunning’: Sự
chạy theo trớn
(b) v. (of a towed vehicle) to travel
faster than the towing vehicle: Xe
bò kéo chạy theo trớn nhanh hơn
xe kéo
overrun control valve n. valve in a
crossover pipe between the
compressor suction and discharge
sides of some turbocharger
systems: Van kiểm soát vượt tốc
của bộ tăng áp.
overrun cut-off/ shut-off n. =
DECELERATION FUEL CUT-

guide with a slightly larger outside
diameter than the standard valve
guide, used to repair worn valve
guides after their bores have been
reamed: Ống kềm sú páp có kích
thước lớn để thay ống kềm sú
páp bò mòn.
overspray n. Undesirable spray
residues on adjacent panels and
car parts beyond the resprayed
area (countered by careful
masking): Lớp sơn lan sang chỗ
khác
over square engine n. Engine where
the bore size is lager than the
stroke: Động cơ có đường kính
piston lớn hơn hành trình.
oversteer 1 v. (of a vehicle) to turn
more sharply than the driver
intends (possibly causing the rear
of the vehicle to slide wide):
Quay vòng thừa
2 n. action of oversteering: Sự
quay vòng thừa
(NOTE: opposite is understeer)
overtake v. To pass another vehicle
going in the same direction: Vượt
overthin v. To add too much thinner
to paint: Cho quá nhiều xăng
thơm khi pha loãng sơn.

 oxidizer or oxidizing agent =
compound which gives up oxygen
easily, removes hydrogen from
overrunning clutch starter

oxidizer

PGS. TS. ĐỖ VĂN DŨNG
252
Tự điển Anh – Việt chuyên ngành Công nghệ Ô tô
another compound, or attracts
electrons: Tác nhân ôxi hóa
 oxidizing catalyst = catalyst
which decreases CO and HC
levels using excess air: Chất xúc
tác để ôxi hóa CO và HC trong
khí thải
 oxidizing converter =
converter with a conventional
oxidation catalyst that needs a
secondary air supply to convert
hydrocarbons and carbon
monoxide and water; does not
control NOx emissions: Bộ hoá
khử có bơm khí
oxyacetylene welding n. = gas
welding: Hàn hơi (ôxi –
axêtylen)
oxygen (O) n. Gaseous element
essential for life and the

electrical apparatus, such as arc
welding equipment); particularly
harmful to tyres.: Khí ôzôn oxidizing catalyst

ozone