Toyota CAMRY CNG User manual

TOYOTA CAMRY CNG
EMERGENCY
RESPONSE G UIDE

FOREWORD
Unlike the conventional gasoline model, the CAMRY CNG
operates
on compressed natural gas .
Natural gas is a colorless, transparent gas that is lighter than
air .
This model requires special procedures that
must be
fol-
lowed not only when performing ordinary service on the ve-
hicle but also for rescuing people or handling the vehicle in
the event that the vehicle is damaged in an accident or a di-
saster .
Read the contents of this manual carefully to prevent injuries
and secondary disasters .
TOYOTA MOTOR CORPORATION
©1999 TOYOTA MOTOR
CORPORATION
All rights
reserved . This book may not be repro-
duced or
copied, in whole or in part, without the
written permission
of
Toyota Motor Corporation .

TABLE OF CONTENTS
CHARACTERISTICS OF THE CAMRY CNG . . . . . . . . . . . 2
FUEL SYSTEM AND PARTS LAYOUT DIAGRAM . . . . . . 4
COMPRESSED NATURAL GAS (CNG) . . . . . . . . . . . . . . . 6
EMERGENCY HANDLING

. . . . . . . . . . . . . . . . . . . . . . . . . 6
PRECAUTIONS
TO
BE OBSERVED
WHEN SERVICING
THE VEHICLE . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . 8

Fuel Tank
When the fuel tank
is full,
the pressure of the natural gas is
approximately 24,800 kPa (3,600 psi) .
equivalent to 135 liters (35 .7 gal-
Ions, 29 .7 Imperial gallons) of water .
The highly
compressed
gas from
the fuel
tank
undergoes
pressure reduction at the
regulator .
Then, the
proper amount
of this gas is injected through the
injectors into the engine .

FUEL SYSTEM AND PARTS
LAYOUT DIAGRAM

Fuel Receptacle
Fuel Tank
Manual Shutoff Valve
Fuel Filter
Fuel Pressure Regulator
Fuel Shutoff Valve
Fuel
Shutoff Valve
Injector
Inlet Check Valve
Fuel Shutoff Valve
Pressure Relief Valve
Vent Pipe

COMPRESSED NATURAL GAS
(CNG)
Natural gas is a colorless, transparent gas with
methane as its
main
component
.
No matter how much
it is
compressed at
room
temperature, it remains in the gaseous state . Because it
is
lighter than air, it will dissipate upward when released
without remaining on the ground .
EMERGENCY HANDLING
In case the vehicle has sustained damage :
(1) Beware of any fire, sparks, or electrostatic charges be-
fore approaching the vehicle .
(2)
Close
the manual shutoff valve and check the fuel sys-
tem
near the damaged area for any gas leaks . (If the ve-
hicle is located indoors, close the manual shutoff valve
and open the windows and doors to introduce fresh air .
Do not carelessly turn on the lights or electric fans be-
cause natural gas, which is lighter than air, tends to settle
upward .)
(3) Open all the doors
of the vehicle to introduce fresh air,
and turn the
ignition switch OFF .
(4) Beware that the gas remaining in the pipes could leak
out, depending on the area of the damage, even after the
ignition switch has been turned OFF or the manual shut-
off valve has been closed .
(5) Check the fuel system again
for any gas leaks . After veri-
fying the absence of
any leaks, proceed to the next opera-
tion
.

The method for extinguishing
a fire is basically the
same
as
for
gasoline-engine vehicles .
However, beware that the fuel
tank of
the CAMRY
CNG
is
provided with a pressure relief
valve to prevent the
fuel tank from bursting . This valve melts
at approximately 100 °
C
(212 ° F) to release the gas into the
atmosphere
before the tank could burst . (The gas is
dis-
charged downward and out of the vehicle through a vent pipe
in
the floor located ahead of the fuel tank .)
For this reason, if there is a fire behind
the vehicle or in the
back of
the vehicle's cabin, the gas
in the tank will be dis-
charged upon the melting of the pressure
relief valve . If this
gas is ignited, the fire
could become even more extensive .
Take this factor into
consideration if the fire-fighting opera-
tion takes
longer time than anticipated, and take appropriate
measures
such as fighting
the lire from a distance .