Advance Safety and SRS Sytems
Advance Safety Electronics
Advanced Safety Electronics ASE is the passive safety system on the E85. The system is based on the same technology as the Intelligent Safety and Integration System (ISIS) of the
E65/E66.
The ASE system consists of the Safety Information Module SIM and several control units, called satellites, that are linked across the byteflight bus. In the case of the MRS system
there was only one central control unit. On the E85, the acceleration sensors are integrated into the satellites.
The actuators are directly connected to the satellites and are activated by the satellites. The satellites are fitted at strategic points in the car. The distributed sensor system in the car
enables measurement of the accelerations occurring as close as possible to the outer shell of the body and at the location of the collision.
The direct recording and processing of the information in the control unit mean that significantly shorter reaction times can be achieved. The mechanical time lag within the body to
a central control unit is eliminated.
The distributed sensors in the satellites provide redundant information that is interchanged via the byteflight. This leads to even more reliable trigger decisions. In comparison to the
MRS systems used to date, the ASE enables, (for example in the event of a side-on collision) earlier triggering.
Advantages of the ASE System
Networked airbag control system with optical bus byteflight
More exact crash detection regarding the direction and strength ofthe impact
Battery cable diagnosis with cutoff of the safety battery terminal when required
Airbag switch for deactivation/activation of the front airbags on passenger side, side airbags and knee airbag on US models
Deployment of a knee airbag for driver and passenger on US model
The crash situation is detected more precisely than on the multiple restraint system MRS. In the event of a crash, only those actuators are triggered that are necessary for optimum
protection of the driver and passenger. This leads to lower repair costs and thus more favourable insurance classifications.
A number of acceleration sensors in the vehicle record the vehicle deceleration. The satellites exchange acceleration data. This provides an exact picture of the crash situation,
enabling a timely and selective triggering of the actuators depending on the crash situation.
System Components
The ASE system consists of the following components:
• Byteflight bus
• Control Units
SIM - With acceleration sensors
SBSL - satellite b-pillar on left side of vehicle
SBSR - satellite b-pillar on right side of vehicle
• Sensors
STVL - pressure sensor left door
STVR - pressure sensor right door
Seat occupancy sensor
B+ Cable Monitoring
Seat Belt Switches -Driver and Passenger
Airbag Switch
• Actuators
Driver’s Side Airbag (2 stage)
Passenger Side Airbag (2 stage)
Side Airbags (2)
Knee Airbag Driver’s Side
Knee Airbag Passenger Side
Seat Belt Tensionsers (2)
BST
Airbag Indicator Light
Byteflight
The increasing complexity of in-car electronics and the growing amount of sensors, actuators and electronic control units place higher demands on the high-speed data communciation protocols.
None of the communication solutions available until now have been able to fulfill all these demands. BMW together with several semi-conductor companies have developed byteflight a new protocol for safety-critical applications in automotive vehicles.
The byteflight is the bus system used exclusively for the ASE System (Intelligent Safety Integration System). This ASE Sytem of the E85 contains the Safety and Information
Module (SIM) and 4 additional satellite control modules.
The ASE System is a bus composed of Fiber Optic cables and control modules arranged in a STAR pattern with the SIM at the center of the system.
Since the byteflight is a star structure as opposed to the continious ring structure of the MOST bus, the fiber optic cables carry the data bi-directionally, a single fiber optic cable connects each satellite directly to the SIM.
Each satellite contains a transmitter/receiver module for receiving and sending data to the SIM. The SIM contains 4 transmitter receiver modules for communication with the satellites simultaneously.
All information from each satellite is made available to every other satellite by the SIM.
Note:
Repairs to the byteflight fiber-optic cable are not permitted. Damaged cables must be replaced with new fiber optic cables.
Advanced Safety Electronics ASE is the passive safety system on the E85. The system is based on the same technology as the Intelligent Safety and Integration System (ISIS) of the
E65/E66.
The ASE system consists of the Safety Information Module SIM and several control units, called satellites, that are linked across the byteflight bus. In the case of the MRS system
there was only one central control unit. On the E85, the acceleration sensors are integrated into the satellites.
The actuators are directly connected to the satellites and are activated by the satellites. The satellites are fitted at strategic points in the car. The distributed sensor system in the car
enables measurement of the accelerations occurring as close as possible to the outer shell of the body and at the location of the collision.
The direct recording and processing of the information in the control unit mean that significantly shorter reaction times can be achieved. The mechanical time lag within the body to
a central control unit is eliminated.
The distributed sensors in the satellites provide redundant information that is interchanged via the byteflight. This leads to even more reliable trigger decisions. In comparison to the
MRS systems used to date, the ASE enables, (for example in the event of a side-on collision) earlier triggering.
Advantages of the ASE System
Networked airbag control system with optical bus byteflight
More exact crash detection regarding the direction and strength ofthe impact
Battery cable diagnosis with cutoff of the safety battery terminal when required
Airbag switch for deactivation/activation of the front airbags on passenger side, side airbags and knee airbag on US models
Deployment of a knee airbag for driver and passenger on US model
The crash situation is detected more precisely than on the multiple restraint system MRS. In the event of a crash, only those actuators are triggered that are necessary for optimum
protection of the driver and passenger. This leads to lower repair costs and thus more favourable insurance classifications.
A number of acceleration sensors in the vehicle record the vehicle deceleration. The satellites exchange acceleration data. This provides an exact picture of the crash situation,
enabling a timely and selective triggering of the actuators depending on the crash situation.
System Components
The ASE system consists of the following components:
• Byteflight bus
• Control Units
SIM - With acceleration sensors
SBSL - satellite b-pillar on left side of vehicle
SBSR - satellite b-pillar on right side of vehicle
• Sensors
STVL - pressure sensor left door
STVR - pressure sensor right door
Seat occupancy sensor
B+ Cable Monitoring
Seat Belt Switches -Driver and Passenger
Airbag Switch
• Actuators
Driver’s Side Airbag (2 stage)
Passenger Side Airbag (2 stage)
Side Airbags (2)
Knee Airbag Driver’s Side
Knee Airbag Passenger Side
Seat Belt Tensionsers (2)
BST
Airbag Indicator Light
Byteflight
The increasing complexity of in-car electronics and the growing amount of sensors, actuators and electronic control units place higher demands on the high-speed data communciation protocols.
None of the communication solutions available until now have been able to fulfill all these demands. BMW together with several semi-conductor companies have developed byteflight a new protocol for safety-critical applications in automotive vehicles.
The byteflight is the bus system used exclusively for the ASE System (Intelligent Safety Integration System). This ASE Sytem of the E85 contains the Safety and Information
Module (SIM) and 4 additional satellite control modules.
The ASE System is a bus composed of Fiber Optic cables and control modules arranged in a STAR pattern with the SIM at the center of the system.
Since the byteflight is a star structure as opposed to the continious ring structure of the MOST bus, the fiber optic cables carry the data bi-directionally, a single fiber optic cable connects each satellite directly to the SIM.
Each satellite contains a transmitter/receiver module for receiving and sending data to the SIM. The SIM contains 4 transmitter receiver modules for communication with the satellites simultaneously.
All information from each satellite is made available to every other satellite by the SIM.
Note:
Repairs to the byteflight fiber-optic cable are not permitted. Damaged cables must be replaced with new fiber optic cables.
