| VELOSTER(FS) >2013 > G 1.6 T-GDI > Body Electrical System > Button Engine Start System>Description and Operation |
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System Overview
The System offers the
following features:
The RKE and SMART KEY
functions are not considered part of this Button Engine Start system and
are specified in separated system.
System Main Function
Button Engine Start System
The Button Start System
allows the driver to operate the vehicle by simply pressing a button
(called as SSB) instead of using a standard mechanical key.
If the driver press the
SSB while prerequisites on brakes, fob authentication and transmission
status are satisfied, the BES System will proceed with the
locking/unlocking of the steering column, the control of the terminal, and
the cranking of the engine.
The driver can release
the SSB as soon as this sequence initiated. After positive response from
immobilizer interrogation, the system will activate the starter motor and
communicate with the EMS to check the engine running status for starter
release.
The driver will be able
to stop the engine by a short push on the SSB if the vehicle is already in
standstill. Emergency engine stop will be possible by a long press of the
SSB or 3 consecutive presses in case the vehicle is in ENGINE
RUNNING.
If the conditions for
engine cranking are not satisfied while a push on the SSB is detected and
a valid fob authenticated, the system will unlock the steering column and
switch the terminals to IGN. Another push on the SSB will be necessary to
start the engine.
In case of a vehicle
equipped with SMART KEY system, fob authentication will not require any
action from the driver. For limp home start or in case of vehicle without
SMART KEY, the driver will have to insert the fob into the fob
holder.
Indicator ON/OFF Condition At Ignition
Key Off Condition
Indicator ON/OFF Condition According
To Ignition Key's Position
Smart Key Unit
The SMK manages all
function related to:
The unit behaves as
Master role in the whole system.
In case of SMART KEY
application, for example “Passive Access”, “Passive Locking” and “Passive
Authorization are integrated for Terminal switching
Operations”.
It collects information
about vehicle status from other modules (vehicle speed, alarm status,
driver door open...), reads the inputs (e.g. SSB, Capacitive Sensor / Lock
Button, PARK position Switch), controls the outputs (e.g. exterior and
interior antennas), and communicates with others devices via the CAN
network as well as a single line interfaces.
The diagnosis and
learning of the components of the BES System are also handled by the
SMK.
The SMK manages the
functions related to the "terminal control" by activating external relays
for ACC, IGN1 and IGN2. This unit is also responsible for the control of
the STARTER relay.
The SMK is also
controlling the illumination of the SSB as well as the "system status
indicator", which consists of 2 LEDs of different color. The illumination
of the fob holder is also managed by the SMK.
The SMK reads the inputs
(Engine fob in, vehicle speed, relays contact status), controls the
outputs (Engine relay output drivers), and communicates with others
devices via the CAN.
The internal
architecture of the SMK is defined in a way that the control of the
terminal is secured even in case of failure of one of the two
microcontrollers, system inconsistency or interruption of communication on
the CAN network.
In case, failure of one
of the two controllers, the remaining controller shall disable the starter
relay. The IGN1 and IGN2 terminals relays shall be maintained in the state
memorized before the failure and the driver shall be able to switch those
IGN terminals off by pressing the SSB with EMERGENCY_STOP pressing
sequence. However, engine restart will not be allowed. The state of the
ACC relay will depend on the type of failure.
The main functions of
the SMK are:
Start/Stop Button (SSB)
A single stage push
button is used for the driver to operate the vehicle. Pressing this button
allows:
The contact will be
insured by a micro-switch and a backlighting is provided to highlight the
marking of the button whenever necessary.
Two (2) LED colors are
located in the center of the button to display of the status of the
system. Another illumination LED is also integrated into the SSB for the
lighting of the "Engine Start/Stop" characters.
BES(Button Engine Start) System State
Chart
System STATES in LEARNT MODE
In learnt mode, the BES
System can be set in 6 different sates, depending on the status of the
terminals and Engine status:
Referring to the
terminals, the system states described in the table above are same as
those one found in a system based on a mechanical ignition
switch.
The one of distinction
with Mechanical-Ignition-Switch based system is that the BES system allows
specific transition from [OFF] to [START] without going through [ACC] and
[IGN] states.
System STATES IN VIRGIN MODE
The BES System can be
set in 5 different states (OFF LOCKED is not available in virgin mode),
depending on the status of the terminals and Engine status :
Referring to the
terminals, the system states described in the table above are same as
those one found in a system based on a mechanical ignition switch.
The one of distinction
with Mechanical-Ignition-Switch based system is that the BES system allows
specific transition from [OFF] to [START] without going through [ACC] and
[IGN] states. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
