<s>
A	O
throttle	B-Algorithm
position	I-Algorithm
sensor	I-Algorithm
(	O
TPS	O
)	O
is	O
a	O
sensor	O
used	O
to	O
monitor	O
the	O
air	O
intake	O
of	O
an	O
engine	O
.	O
</s>
<s>
For	O
example	O
,	O
an	O
extra	O
"	O
closed	O
throttle	B-Algorithm
position	I-Algorithm
sensor	I-Algorithm
"	O
(	O
CTPS	O
)	O
may	O
be	O
employed	O
to	O
indicate	O
that	O
the	O
throttle	O
is	O
completely	O
closed	O
.	O
</s>
<s>
Some	O
engine	B-Device
control	I-Device
units	I-Device
(	O
ECUs	O
)	O
also	O
control	O
the	O
throttle	O
position	O
by	O
electronic	O
throttle	O
control	O
(	O
ETC	O
)	O
or	O
"	O
drive	O
by	O
wire	O
"	O
systems	O
,	O
and	O
if	O
that	O
is	O
done	O
,	O
the	O
position	O
sensor	O
is	O
used	O
in	O
a	O
feedback	O
loop	O
to	O
enable	O
that	O
control	O
.	O
</s>
<s>
These	O
modern	O
non	O
contact	O
TPS	O
include	O
Hall	B-Algorithm
effect	I-Algorithm
sensors	I-Algorithm
,	O
inductive	B-Algorithm
sensors	I-Algorithm
,	O
magnetoresistive	O
and	O
others	O
.	O
</s>
<s>
In	O
the	O
potentiometric	B-Device
type	O
sensors	O
,	O
a	O
multi-finger	O
metal	O
brush/rake	O
is	O
in	O
contact	O
with	O
a	O
resistive	O
strip	O
,	O
while	O
the	O
butterfly	O
valve	O
is	O
turned	O
from	O
the	O
lower	O
mechanical	O
stop	O
(	O
minimum	O
air	O
position	O
)	O
to	O
WOT	O
,	O
there	O
is	O
a	O
change	O
in	O
the	O
resistance	O
and	O
this	O
change	O
in	O
resistance	O
is	O
given	O
as	O
the	O
input	O
to	O
the	O
ECU	O
.	O
</s>
<s>
Non	O
contact	O
type	O
TPS	O
work	O
on	O
the	O
principle	O
of	O
Hall	O
effect	O
or	O
inductive	B-Algorithm
sensors	I-Algorithm
,	O
or	O
magnetoresistive	O
technologies	O
,	O
wherein	O
generally	O
the	O
magnet	O
or	O
inductive	O
loop	O
is	O
the	O
dynamic	O
part	O
which	O
is	O
mounted	O
on	O
the	O
butterfly	O
valve	O
throttle	O
spindle/shaft	O
gear	O
and	O
the	O
sensor	O
&	O
signal	O
processing	O
circuit	O
board	O
is	O
mounted	O
within	O
the	O
ETC	O
gear	O
box	O
cover	O
and	O
is	O
stationary	O
.	O
</s>
