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Chassis Systems Control
AB12 – New generation
of airbag control units
Characteristics
The airbag control units AB12 base and AB12 plus are
fl exible and scalable with respect to the number of fi
ring loops and sensor interfaces for peripheral crash
sensors. The airbag control units can trigger up to 32 fi
ring loops and control 12 PSI5 sensor interfaces. There
is also the option to expand the control units to trigger
up to 48 fi ring loops and control up to 18 sensor
interfaces.
High-g sensors and optional rollover sensors are
already integrated into the control unit of the variant
AB12 base. With the AB12 plus variant Bosch has
developed a concept which integrates the airbag
control and the ESP® inertial sensors into one compact
airbag control unit, saving both space and cost. There
is also the option of extending the AB12 plus variant
with a complete set of angular rate and acceleration
sensors for all three dimensions (6D), meaning that
Customer benefits
chassis systems are also supported in addition to the
Configurable for all markets, vehicle segments and
ESP® and rollover-protection features.
platforms
Flexibility in the use of connector systems
The AB12 control units evaluate the data from the
Integration of inertial sensors possible
pressure sensors to detect side crashes and from the
Modular integration of both established and new
acceleration sensors to detect side, front and rear-end
algorithms
crashes. In accordance with the PSI5 standard, the
Safety concept compliant with ISO 26262
peripheral sensors can be operated either on a
Use of Bosch electronic components
sensor bus or via a point-to-point connection.
The accuracy of the algorithms used to detect front,
With AB12, Bosch off ers airbag control units that are
rear-end and side crashes as well as rollovers has been
scalable for all markets, vehicle segments and plat-
further improved in comparison with the previous
forms. These occupant protection electronic modules
version, partly as a result of the addition of a new
can be adapted for varying customer hardware and
algorithm based on the parameters of the
functionality requirements.
kinetic energy absorption in crash (KEC).
Chassis Systems Control | AB12 – New generation of airbag control units
Configuration AB base
Configuration AB plus
ESP® Ω Z
Low-g a x,y
Roll rate
Low-g a y,z
scalable
µC family
Scalable ASIC family
• Power supply
• I/O
• Safety controller
• up to 16 ﬁring loops
• up to 6 sensor
interfaces
Roll rate
Low-g a y,z
scalable
µC family
High-g a x,z
Scalable ASIC family
• Power supply
• I/O
• Safety controller
• up to 16 ﬁring loops
• up to 6 sensor
interfaces
High-g a x,z
Scalable ASIC family
• Power supply
• I/O
• Safety controller
• up to 16 ﬁring loops
• up to 6 sensor
interfaces
---- optional
Scalable ASIC family
• Power supply
• I/O
• Safety controller
• up to 16 ﬁring loops
• up to 6 sensor
interfaces
---- optional
Following a crash, the airbag control not only sends a
All airbag control units from Bosch use the integrated
signal to interrupt the fuel supply. The crash information
safety controller (SCON). With its watchdog function,
is also provided to other vehicle systems, such as to an
the SCON monitors the program flow in the microcon-
eCall system, which automatically triggers an emergency
troller, preventing undesirable system behavior.
call when an airbag is activated, or to the braking control
system,
which can bringbase配置
the vehicle to a standstill to
标准型气囊电控单元AB
avoid further collisions (Secondary Collision Mitigation).
There is also the option to integrate advanced passive
滚转率
safety features such as the Early
Pole Crash Detection or
低 g a y,z use the vehicle
pre-crash functions. These functions
The
new airbag control plus配置
units are lead-free and have
升级型气囊电控单元AB
been developed compliant with ISO 26262. They are
ESP® Ω Z
based on over 40 years of experience
and expertise in
低载荷 a x,y
the development of components for the automotive
滚转率
electronics industry.
低 g a y,z
可升级
dynamic
sensors or surround sensors to provide optiµC
系列 of the restraint高devices
g a x,z and other actuators
mum control
可升级 Sensor Interface
Peripheral
高 g a(PSI5)
µC
系列
x,z
The Peripheral
Sensor Interface
is an interface
if the vehicle is about to crash. Reversible and irrevers-
for automotive sensor applications. PSI5 is an open
ible
actuators
the AIDA
algorithm.
可升级的
系列
可升级的
系列controlled by
ASIC
ASICare
• 电源
• 电源
• 输入/输出
• 输入/输出
For
the AB12 control units, the
software functions can
• 安全控制器
• 安全控制器
be put together in a flexible manner, including, for
• 最多16个点火回路
• 最多16个点火回路
example,
the integration of an• occupant-classification
最多6个传感器接口
• 最多6个传感器接口
system or an electronic pedestrian-protection system
standard
on existing sensor
interfaces
for
可升级的
可升级的based
ASIC系列
ASIC系列
peripheral
airbag sensors, which
has been validated
• 电源
• 电源
• 输入/输出
• 输入/输出
already
in millions of airbag systems.
Main features of
• 安全控制器
• 安全控制器
the PSI5 are high speed and high reliability data transfer
• 最多16个点火回路
• 最多16个点火回路
at• lowest
possible implementation
overhead. PSI5
• 最多6个传感器接口
最多6个传感器接口
covers the requirements of digital automotive interfaces
that uses the data from acceleration sensors or a
---- 可选
Pressure Tube Sensor in the bumper. In addition, the
and
---- offers
可选 a universal and flexible solution for multiple
sensor applications.
airbag control units can be used as an event data
recorder, if required.
Hardware and system concept
The AB12 control units have a new mechanical design
consisting of a metal base plate and a plastic housing.
The platform design enables customerspecific design of
the base plate, the connector system and the level of
ingress protection (IP54; optionally up to IP58).
Robert Bosch GmbH
Chassis Systems Control
455 Xing Long Street Suzhou Industrial
Park 215024
www.bosch-automotivetechnology.com
Printed in China
292000P0Z6-C/CCA-201211-En
© Robert Bosch GmbH 2012. All rights reserved, also regarding any disposal, exploitation,
reproduction, editing, distribution, as well as in the event of registration for industrial property rights.