Samba_Asia_Brio_TA01Z005_EN.pdf
(
97 KB
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Pobierz
M.T.M. s.r.l.
Via La Morra, 1
12062 - Cherasco (Cn) - Italy
Tel. ++39 0172 48681
Fax ++39 0172 488237
Samba
Asia
Brio
- installer’s handbook -
09.2003
TA01Z005I
Asia
Brio
2
Samba
CONTENTS
Samba
1. PRESENTATION
2. ECU FUNCTIONS
2.1. CHANGEOVER FUNCTIONS
2.1.1. P
ETROL FORCED MODE
2.1.2. P
ETROL
-
GAS AUTOMATIC CHANGEOVER MODE
2.1.3. G
AS FORCED MODE
2.2. LEVEL GAUGING
2.3. TROUBLESHOOTING
3. ECU CALIBRATION
3.1. ACCESS TO THE CALIBRATION DOMAIN
3.2. CALIBRATION DOMAINS
3.3. MEMORISATION OF CALIBRATION PARAMETERS
3.4. CALIBRATION OF CHANGEOVER RPM THRESHOLD
4. ELECTRICAL CONNECTIONS
Asia
1. PRESENTATION
2. ECU FUNCTIONS
2.1. CHANGEOVER FUNCTIONS
2.1.1. P
ETROL FORCED MODE
2.1.2. P
ETROL
-
GAS AUTOMATIC CHANGEOVER MODE
2.1.3. G
AS FORCED MODE
2.2. LOW FUEL INDICATION
3.
CALIBRATION OF CHANGEOVER RPM THRESHOLD
4. ELECTRICAL CONNECTIONS
Brio
1. PRESENTATION
2. ECU FUNCTIONS
2.1. CHANGEOVER FUNCTIONS
2.1.1. P
ETROL FORCED MODE
2.1.2. P
ETROL
-
GAS CHANGEOVER MODE
(
CUP EMPTYING
)
2.1.3. G
AS FORCED MODE
2.1.4. G
AS
-
PETROL CHANGEOVER MODE
2.2. LEVEL GAUGING
2.2.1. V
ERSION WITH COMPLETE INDICATION
2.2.2. V
ERSION WITH LOW FUEL INDICATION
4. ELECTRICAL CONNECTIONS
Samba
3
changes over to gas if a given rpm
threshold is exceeded and there is
through the connection to the BRC
level sensor of the resistive type (0-
90 ohm). Beside the changeover
button and above the TWO-
COLOUR LED there is a level
gauge consisting of a high-bril-
liance three-GREEN LED bar (ECU
front view: fig.1).
Three GREEN LEDs lit mean
that the tank is full, while the first
below GREEN LED flashing means
that it is in reserve.
The level indicator is pre-cali-
brated but it is possible to calibrate
the thresholds to adapt them to the
equipment fitted (par. 3).
Samba
code 06LB00001240
1. PRESENTATION
Destined to the injection vehi-
cles, Samba is a changeover ECU
for gas systems based on a micro-
controller that can be built-in on the
dashboard.
Commutazione automatica
a subsequent rpm drop (decelera-
tion condition).
It is possible to calibrate the fuel
overlapping time while changing
over (par. 3).
With the engine running on
petrol the TWO-COLOUR LED
turns red (blinking in absence of
rpm and fixed in presence of rpm),
orange when the given changeover
threshold is exceeded and fixed
green after changing over to gas.
2.3. TROUBLESHOOTING
The Samba ECU is able to
make a diagnosis of its working in
real time and to trace errors or
faulty operations on the GREEN
LEDs of the changeover switch.
In particular, in the event of the
engine being turned off accidental-
ly, even with the key contact con-
nected, the ECU closes the gas
solenoid valves to prevent any gas
leakage (“safety” function) and noti-
fies the accidental cut-out through
a shifting GREEN LED lit.
2. ECU FUNCTIONS
It fulfils the following functions:
changeover, gas level gauging and
safety indication.
2.1. CHANGEOVER FUNC-
TIONS
2.1.1. P
ETROL FORCED MODE
2.1.3. G
AS FORCED MODE
3. ECU CALIBRA-
TION
The Samba ECU enables to
freely define parameters such as
the control of the tank level and the
changeover, by selecting proper
calibration ranges from the switch.
The changeover rpm threshold
can be adjusted from a trimmer.
Gas forced mode
Petrol forced mode
With the switch in its
“Gas
forced”
position, the engine only
runs on gas. The TWO-COLOUR
LED turns fixed green during the
“starter” function (opening of the
solenoid valves for a certain lapse
of time, to enable the direct starting
on gas), then blinking green waiting
for the engine start-up and fixed
green again with the engine start-
ed.
With the switch in its
“Petrol
forced”
position, the vehicle can
regularly run on petrol as if there
was no gas equipment fitted. The
TWO-COLOUR LED turns red
(orange when the rpm are beyond
the changeover threshold), the gas
solenoid valves are closed and the
contact for the petrol injector cut is
closed (petrol injectors are work-
ing).
3.1. ACCESS TO THE CALI-
BRATION DOMAIN
To accede to the calibration
domain it is necessary to follow the
below process:
- changeover switch in its cen-
tral position;
- switch the instrument board
This is to be considered as an
emergency solution
, only to be
used in the event of faulty operation
of the petrol supply or of starting
failure.
2.1.2. P
ETROL
-
GAS AUTOMATIC
CHANGEOVER MODE
With the switch in its central
position
“Automatic changeover”
(
recommended position for pow-
ering the vehicle by gas
), the
vehicle starts up on petrol, and
2.2. LEVEL GAUGING
The Samba ECU is devised for
the gas level gauging function,
on;
- verify that the TWO-COLOUR
LED turns blinking red;
4
Samba
3.3. MEMORISATION OF
CALIBRATION PARAME-
TERS
1st domain: minimum tank level
calibration
With the tank empty and the
switch in its petrol position (TWO-
COLOUR LED is fixed green) the
value has been acquired and the
changeover switch can be in its
central position (TWO-COLOUR
LED is blinking green).
It is not possible to acquire a
minimum level value higher than
the maximum level value.
- make three transitions from the
petrol to the central position during
six seconds (approx. one second
for each shifting of the switch), with
the changeover switch in its central
position after the last transition;
- the third GREEN LED (ECU
front view: fig.1) blinking means the
access to the first calibration
domain (the TWO-COLOUR LED
is switched off if the minimum level
calibration has never been made,
whereas it is blinking green if the
calibration has been made at least
once);
- this way we enter the 1st cali-
bration domain (minimum tank
level).
this value. The blinking green
TWO-COLOUR LED shows the
correct acquisition of the new
value.
The default calibration is 6/10 of
second (second GREEN LED).
4th domain: parameter set-up
This domain is used to reset the
ECU default parameters.
With the switch in its petrol posi-
tion, wait approx. 5 seconds: the 3
fixed GREEN LEDs mean that the
default values have been reset.
IMPORTANT
After every calibration operation
it is necessary to switch off and on
the panel.
2nd domain: maximum tank level
calibration (4/4)
With the tank full (4/4) and the
changeover switch in its petrol posi-
tion (TWO-COLOUR is fixed green)
the value has been acquired and
the changeover switch can be in its
central position (TWO-COLOUR
LED is blinking green).
It is not possible to acquire a
maximum level value lower than
the minimum level value.
3.2.
CALIBRATION
DOMAINS
The various calibration domains
are in the following order.
3.4. CALIBRATION OF
CHANGEOVER RPM
THRESHOLD
The Samba ECU is calibrated to
have a changeover threshold of
approx. 2000 rpm (with a standard
ignition system).
Should this value be modified, it
is convenient to turn the proper
trimmer positioned behind the
GREEN LEDs completely clock-
wise.
To set the changeover threshold
it is necessary to have the switch in
its petrol position (fixed red TWO-
COLOUR LED), start the engine, fix
the rpm for changing over and turn
the trimmer very slowly anti-clock-
wise (always at steady rpm), until
the TWO-COLOUR LED turns from
red to orange.
1. minimum tank
level
2. maximum tank
level
3rd domain: fuel overlapping
time calibration
With the changeover switch in
its petrol position, the GREEN
LEDs show the current overlapping
time for 3 seconds, according to the
following encoding:
- GREEN LEDs turned off: no
overlapping
- first GREEN LED: 3/10 of sec-
ond
- second GREEN LED: 6/10 of
second
- third GREEN LED: 9/10 of sec-
ond
3. fuel overlap-
ping time
4. parameter
set-up
The GREEN LEDs are blinking
during calibration. The TWO-
COLOUR LED has the following
meanings:
- switched off: calibration
domain never calibrated;
- blinking green: calibration
domain parameter already calibrat-
ed;
- fixed green: while memorising
data.
IMPORTANT
Turning the trimmer anti-clock-
wise the changeover threshold is
decreased, whereas turning it
clockwise the changeover threshold
is increased.
IMPORTANT:
- You can pass from a calibra-
tion domain to another one by
changing over from the central to
the gas position.
- At every passage the
changeover switch should be in its
central position to memorise the
corresponding parameter.
After 3 seconds, the level LEDs
start shifting, following the encoding
indicated above in a cyclic way and
the TWO-COLOUR LED turns fixed
green (acquisition of a new value).
When the LED showing the given
overlapping time is lit, the
changeover switch should be in its
central position again to acquire
Samba
5
4. ELECTRICAL CONNECTIONS
CABLE COLOUR
CONNECTION
BROWN
POSITIVE KEY CONTACT
BLACK
ENGINE GROUND
GREY
IGNITION IMPULSES
GREEN
GAS SOLENOID VALVES
ORANGE
INJECTOR SUPPLY IN
VIOLET
INJECTOR SUPPLY OUT
WHITE/BLACK
TANK LEVEL
NOTE:
The grey wire can be indifferently connected to:
- the ignition coil negative;
- the square wave signals available between the ignition ECU and the cor-
responding power module (provided that they have sufficient amplitude) or
direct to the revolution counter.
Do not twist the wire as an antenna on the high voltage cables.
To the injectors
Orange
Green
"
Violet
Injector con-
trol c
a
ble
Further Gas
S.V.
Petrol injection
ECU
Reducer
S.V.
Black
Engine ground
White/Black
To the BRC level resistive
Sensor (0 - 90 ohm)
Gas S.V.
-
+
+ 12V
Key
contact
Brown
Grey
7
,5 A
Coil
WARNING
Never allow the petrol tank to
become empty so as to avoid
dry-running the pump. It is nec-
essary to maintain a petrol quan-
tity corresponding to 1/4 or 1/2
of the tank at all times and to
renew it periodically.
Samba
Changeover threshold
adjusting Trimmer
- ECU front view -
M.T.M. S.r.l. declines all respon-
sibility for any improper installa-
tion or use of this product that
may cause serious injury and/or
property damage.
3° LED
Level gauging green LEDs
2° LED
1° LED
Two-colour LED
Fig. 1
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