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Siemens develops color HUD for 5 Series

One of the many innovations on the allnew 2004 BMW 5 Series is the option of a headup display in conjunction with navigation. Important information is displayed in color on a 6 x 3 in (150 x 75 mm) field in the windshield. A virtual image is projected from the top of the instrument panel in line with the end of the hood in the driver's line of sight, necessitating little diversion of attention from the road ahead. Via the iDrive monitor and controller, the driver decides what information is to be shown, and its brightness. The display can be turned on and off via a switch in the lighting control panel to the left of the steering column. Information can be displayed related to Check Control and onboard computer warnings, prioritized according to their urgency; navigation instructions; and active cruise control programmed speed. In addition to driver-selected brightness, the display is automatically regulated according to ambient light and moisture conditions via sensors that also govern the automatic headlight control and rain-sensing wipers. Settings chosen by the driver are captured by the key memory system, and are recaptured when the individual user unlocks the car. Siemens VDO Automotive AG developed the display to go with its complete driver information delivery system, which includes an instrument cluster and center console display. The head-up display projects the most relevant information such as vehicle speed, condition, or navigation information. The display's image is produced by color LED (light-emitting diode) light reflected across four mirrors positioned behind the instrument cluster and onto the specially modified windshield. Through precise mirror positioning, the image appears to freely float out in front of the hood and promotes better maintenance of driver concentration, as less time is required for the eyes to adjust to the slight distance between the road and the displayed information. Siemens successfully met BMW's challenge of developing an instrument cluster visible through a reduced steering wheel vision field and a shallow installation depth to accommodate the HUD option. The solution is a "twineye" instrument cluster design with its digital display between two large

The Siemens-supplied driver information delivery system on the new BMW 5 Series includes an instrument cluster, center console display, and a headup display that projects the most relevant information in the driver's line of sight.

Information in the 5 Series headup display is in color on a 6 x 3 in (150 x 75 mm) field in the windshield in line with the end of the hood.


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speedometer and tachometer gauges. The two gauges display vital vehicle information such as speed, engine rpm, fuel level, and instantaneous fuel consumption. The digital display shows odometer, vehicle computer data, warning messages, time, and outside temperature. Two of the six pointers placed along the instrument edges are disc pointers that show the set speed

for the adaptive cruise control around the speedometer and engine-temperature-sensitive redline around the tachometer. The Siemens-supplied 6.5-in color display in the instrument panel's center acts as a central interface for most of the assistance, navigation, and communications systems. A larger 8.8-in display is used if Professional Navigation (including

map display) and automatic climate control are specified. Both displays use transflective technology, which deflects daylight off the rear of the display, complementing active backlighting and increasing light intensity. In addition, both the center console and headup displays employ sensors to adapt the brightness of the display to current light conditions. Kevin Jost

TRW classifies Durango occupants

The 2004 Dodge Durango features a front passenger seat mass-sensing system that uses strain-gage technology to classify the occupant as infant, child, or adult. "Each strain-gage sensor--mounted at the four corners of the seat between the riser and the seat track--has four strain gages in a bridge configuration with the necessary signal conditioning and amplification circuits," said Richard Cording, Chief Engineer for Occupant Classification Systems/Electronic Safety Systems Group for TRW Automotive. For the Dodge Durango application, the strain-gage sensor requires three bolts per sensor, whereas the sensor mounting for new applications in the 2006 model year will use a single bolt interface. "In both of the designs, the sensors--although technically different-- are mounted so that the seat mass goes through the sensors in a vertical direction," said Cording. For sensor development--primarily to address sensor strength and sensitivity as well as confirm that sensor construction compensates for "off-axis' forces--TRW relied on in-house testing equipment. "We have a small bungee sled that can accelerate a seat along a 10-ft track to an adjustable stop point. The sled test allows us to simulate the forces on the sensors during a low-speed impact. We also have a six-axis seat fixture, where we can individually or in any combination adjust the z, x, or y attachment

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The TRW system uses strain-gage sensor technology, as pictured, to accurately measure the mass occupying the seat.

TRW Automotive's occupant-classification system uses occupant mass to determine whether the airbag should be deployed, and if so, in what manner.

The Dodge Durango uses the TRW Automotive occupant classification system.

position," Cording said. TRW is producing the occupant classification electronics module and seat track position sensors. "We design and manufacture all the electronics and software," said Cording. The electronics module contains a power supply microprocessor and CAN serial data bus transceiver to handle four functions: system diagnostics; occupant classification (based on weight-sensor inputs); transmission of information to the airbag control module; and communication with the vehicle data bus. "The occupant-classification module

electronics provide the power for the sensors, signal conditioning, and EMC protection, and perform sensor/system diagnostics," noted Cording. If an error is detected in the occupant classification system, an error message is sent via the CAN bus through the airbag control module to illuminate the airbag warning lamp. The passenger airbag lamp indicates the status of the passenger airbag control (either enabled or suppressed) based on occupant classification. Future occupant classification systems are in the pipeline. "It is TRW's

position that the seat-frame load path systems are the preferred approach to meeting FMVSS (Federal Motor Vehicle Safety Standard) 208 requirements at this time. We are working on a system--to launch in Europe--that uses inductive sensors. We're also working on a system--to launch in calendar year 2005--that would use a Hall-effect sensor. And we're working on vision systems," Cording said. Kami Buchholz

Delphi's adaptive cruise control technology featured on Cadillac XLR

"You drive a vehicle with adaptive cruise control for two or three days, then you try to use `base' cruise control--it's unusable in many situations," said Bill Job, Design Engineer-Chassis Electronics, General Motors. Job is responsible for the adaptive cruise control (ACC) debuting on the 2004 Cadillac XLR. "If you look at the system diagram, we're interfacing with six other control modules all over the vehicle," said Job. He has counterparts who develop the control logic for the engine-management and antilock braking systems, ensuring that the engine, brakes, and the new adaptive cruise control system are always communicating. "The heart of ACC resides in the controls integration between the radar, engine, and brake systems," he said. The XLR's ACC has several driverselectable parameters that govern

The 2004 Cadillac XLR benefits from an adaptation of Delphi's Forewarn ACC technology.


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The XLR's Delphi ACC system measures the distance and relative speed of vehicles ahead using a long-range radar sensor mounted behind the front bumper that can detect objects more than 100 m (330 ft) ahead.

important functions such as desired following distance. By teaming with the car's advanced headup display, the ACC engineers can deliver up-to-the-second information to the driver about ACC operation. The XLR's ACC is an adaptation of Delphi Corp.'s Forewarn technology, which it demonstrated at this summer's 2004 Product Preview and GM Design and Technology Showcase in Milan, MI. "Adaptive cruise control also brings a comfort and convenience feature to the driver that results in a more relaxed driving experience," said Mary Schafer, Business Line Executive for Chassis and Safety at Delphi Delco Electronics Systems. The ACC system measures the distance and relative speed of vehicles ahead using a long-range radar sensor mounted behind the front bumper of the vehicle, cruising normally when the path ahead is clear and appropriately adjusting to traffic when necessary. Delphi says that its "cruise control with intelligence" is highly reliable, making more individual measurements on each horizontal radar scan than other systems. It can help the driver detect objects more than 100 m (330 ft) ahead of the vehicle. When the lane ahead of the XLR is clear, the ACC system maintains the cruising speed set by the driver. If slower-moving traffic is detected ahead, the system maintains a driver-selected headway--adjustable between 1 and 2 s--using throttle control and limited braking. The system can detect if another vehicle crosses into its path from an adjacent lane and respond appropriately. Compared to other laser-based systems, Delphi says the radar-based technology of the XLR provides superior performance in adverse weather conditions. Kevin Jost

Fog-free 5 Series from Preh

Together with BMW, Preh-Werke, a Deutsche Beteiligungs AG company (formerly part of Rheinmetall AG), has developed and put into production fully electronic heating/ air conditioning (A/C) controls for the new 5 Series. This is Circle 246

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The fully electronic heating/air conditioning controls on the new BMW 5 Series are supplied by Preh-Werke.

The 5 Series antenna system from Hirschmann Electronics handles signals from eight antennae that are built in to the rear window glass.

The Preh defogging sensor is small enough to fit behind the rearview mirror cover.

also the first production car to be fitted with a new kind of antifogging technology that identifies the potential for screen condensation and takes steps to avoid it. The defogging sensor uses a capacitive principle to measure moisture and temperature on the inside of the windshield to identify when fogging is about to occur. Activation of the A/C to prevent fogging is defined by control algorithms that analyze the rate of change of moisture on the window. Antifogging measures are triggered as late as possible but as early as necessary to take into account occupant comfort and vehicle power management. The compact device can be mounted under the rearview mirror cover.

The Preh controls act as an interface between the driver/ passenger and the additional control units. Input signals from the A/C unit and "wellness" monitors such as the defogging sensor are analyzed by background software to determine what steps to take for enhanced occupant comfort levels. The upgraded automatic A/C option offers many additional settings and functions such as direct-control parking heater, auxiliary heating, and residual heat. Another ex-Rheinmetall company, Hirschmann Electronics, supplies an antenna system for the new BMW 5 Series that is nested into the back window. The electronic unit amplifies and identifies the best signal from four different FM antennae built into the rear window. Another four antennae built into the rear glass deliver signals for AM radio, TV, central locking, and remote parking heater. The module has built-in diagnosis functions that report back to a tester the status of the entire system and each of its antenna. David Alexander

Valeo starter/alternator for PSA

In 2004, PSA Peugeot Citroën will be the first automaker to equip a production model with Valeo's belt-driven starter/ alternator in what is expected to be the first 14-volt application. Valeo's easy-to-install unit, through electronic control, not only efficiently generates electrical energy but also is capable of performing the function of a conventional starter motor. The system enables a fuel-saving start-stop mode that automatically cuts off the engine when the vehicle is at a standstill and instantaneously restarts it when the driver engages a gear or releases the brake. The flexible bolt-on solution, which uses existing alternator engine mountings, does not affect powertrain design as much as an integrated starter/alternator, which is located

Valeo's starter/alternator has a standard claw-pole alternator and enough power to crank large gasoline engines of up to 4.2 L.


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Flexible 42 V Test Technology

between the engine and transmission and requires extensive system redesign. Benefits cited by Valeo are up to 10% fuel savings, reduced noise levels while cranking, as well as no noise and zero emissions at standstill, which in congested urban traffic conditions can be greater than 30% of driving time. Valeo's starter/alternator adopts a standard claw-pole alternator similar to that of the 12 million units the company produces each year. It has sufficient power to crank large gasoline engines of up to 4.2 L. Valeo says it has the interest of many vehicle manufacturers that

appreciate the compact, flexible, and easy-to-install design. The company hopes to announce details of further contracts later this year. It has many demonstrator vehicles fitted with a production version of the starter/ alternator with the start-stop function, the earliest example having now successfully covered over 70,000 km (43,500 mi) of city driving. More than 30 customer demonstration vehicles have been equipped with the technology for most OEMs in Japan, Europe, and North America. Kevin Jost

Honda specifies Gracenote for first audio/navigation hard drive

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Gracenote's CDDB music-recognition services will be used in the industry's first OEM car audio and navigation device to offer hard-drive technology--in Honda Civics sold in Japan. These system will provide "smarter" car audio and navigation services by storing vast quantities of information locally. The embedded version of Gracenote CDDB will provide for quick database updates via a cell phone connection to the Internet. The music-recognition service enables listeners to see artist, album, and track name listings, instead of the customary "disc and track number," and provides intuitive ways for users to categorize and access their music. The CDDB is the foundation for Gracenote Music Management System, developed to provide a "complete listening experience" in music devices. In addition to the millions of consumer electronics devices, software media players, and digital music encoders that access CDDB via the Internet, the service is increasingly available in off-line devices by analyzing music based on regional popularity and creating geographically customized databases that are embedded directly onto hard drives and updated periodically.

According to Honda Motor Co., Ltd., its rewritable, hard-drivebased, voice-activated navigation system has double the data capacity of the previous generation. In addition, the new Honda HDD navigation system offers faster searches and route planning along with enhanced display capabilities and a variety of audio-visual functions. The improved functionality includes the capability to save audio CD tracks on the hard disk in MP3 format for later playback, and playback of DVD video. Map data are updated for free for two years after a new-car purchase. With the release of the new navigation system, Honda has also enhanced its InterNavi Premium Club information service, including the world's first "floating car data" service that transmits real-time information to an operations center when the member's car is on a road for which information is not available. Data are used to provide the driver with more precise information on traffic congestion and a new function having the ability to automatically select parking areas based on such parameters as cost and hours of operation. Kevin Jost

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